Mybatis使用（3）

1.example类的使用

generatorConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE generatorConfiguration PUBLIC   
"-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"  
 "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
	<!-- 引入配置文件 -->
	<properties resource="db.properties" />

	<!-- 加载数据库驱动 -->
	<classPathEntry location="${class_path}" />
	
	<!-- context:生成一组对象的环境 
			id:必选，上下文id，用于在生成错误时提示 
			defaultModelType:指定生成对象的样式 
				 1，conditional：类似hierarchical；
				 2，flat：所有内容（主键，blob）等全部生成在一个对象中，推荐使用； 
		  		 3，hierarchical：主键生成一个XXKey对象(key class)，Blob等单独生成一个对象，其他简单属性在一个对象中(record class) 
		  	targetRuntime: 
		  		 1，MyBatis3：默认的值，生成基于MyBatis3.x以上版本的内容，包括XXXBySample； 
		         2，MyBatis3Simple：类似MyBatis3，只是不生成XXXBySample； 
     -->
	<context id="context1" targetRuntime="MyBatis3"	defaultModelType="flat">
	
	    <!-- 生成的Java文件的编码 -->
    	<property name="javaFileEncoding" value="UTF-8"/>
	
	
		<commentGenerator>
			<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
			<property name="suppressAllComments" value="false" />
			<!-- 阻止注释中包含时间戳 true：是 ： false:否 -->
			<property name="suppressDate" value="true" />
			<!--  注释是否包含数据库表的注释信息  true：是 ： false:否 -->
			<property name="addRemarkComments" value="true" />
		</commentGenerator>
		
		<!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
		<jdbcConnection driverClass="${jdbc_driver}"
			connectionURL="${jdbc_url}" userId="${jdbc_username}" password="${jdbc_password}" />


        <!-- java模型创建器，是必须要的元素   负责：1，key类（见context的defaultModelType）；2，java类；3，查询类
        	targetPackage：生成的类要放的包，真实的包受enableSubPackages属性控制；
        	targetProject：目标项目，指定一个存在的目录下，生成的内容会放到指定目录中，如果目录不存在，MBG不会自动建目录
     	-->
		<javaModelGenerator targetPackage="com.enjoylearning.mybatis.entity" targetProject="${project_src}">
			<!-- 设置一个根对象，
	                      如果设置了这个根对象，那么生成的keyClass或者recordClass会继承这个类；在Table的rootClass属性中可以覆盖该选项
	                      注意：如果在key class或者record class中有root class相同的属性，MBG就不会重新生成这些属性了，包括：
	                1，属性名相同，类型相同，有相同的getter/setter方法；
	         -->
			<property name="rootClass" value="com.enjoylearning.mybatis.entity.BaseEntity" />
		</javaModelGenerator>


		<!-- 生成SQL map的XML文件生成器，
            targetPackage：生成的类要放的包，真实的包受enableSubPackages属性控制；
        	targetProject：目标项目，指定一个存在的目录下，生成的内容会放到指定目录中，如果目录不存在，MBG不会自动建目录
         -->
		<sqlMapGenerator targetPackage="." targetProject="${project_mapper_xml}">
		</sqlMapGenerator>
		
		
		 <!-- 对于mybatis来说，即生成Mapper接口，注意，如果没有配置该元素，那么默认不会生成Mapper接口 
		        type：选择怎么生成mapper接口（在MyBatis3/MyBatis3Simple下）：
		            1，ANNOTATEDMAPPER：会生成使用Mapper接口+Annotation的方式创建（SQL生成在annotation中），不会生成对应的XML；
		            2，MIXEDMAPPER：使用混合配置，会生成Mapper接口，并适当添加合适的Annotation，但是XML会生成在XML中；
		            3，XMLMAPPER：会生成Mapper接口，接口完全依赖XML；
		        注意，如果context是MyBatis3Simple：只支持ANNOTATEDMAPPER和XMLMAPPER
		    -->		
    	<javaClientGenerator  targetPackage="com.enjoylearning.mybatis.mapper"	targetProject="${project_src}" type="XMLMAPPER" />




		<!-- shema 数据库 tableName表明 -->
		<table schema="${jdbc_username}" tableName="%" >
			<generatedKey column="id" sqlStatement="MySql"/>
		</table>


	</context>
</generatorConfiguration>

context标签中，targetRuntime=“MyBatis3”

<table schema="${jdbc_username}" tableName="t_job_history"
			 enableCountByExample="false"
			enableUpdateByExample="false" enableDeleteByExample="false"
			enableSelectByExample="false" selectByExampleQueryId="false">
		</table>

将配置改为enableCountByExample = “true”，或者不写（默认为true）

生成的文件：

1）TUserExample.java

package com.enjoylearning.mybatis.entity;

import java.util.ArrayList;
import java.util.List;

public class TUserExample {
    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database table t_user
     *
     * @mbg.generated
     */
    protected String orderByClause;

    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database table t_user
     *
     * @mbg.generated
     */
    protected boolean distinct;

    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database table t_user
     *
     * @mbg.generated
     */
    protected List<Criteria> oredCriteria;

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public TUserExample() {
        oredCriteria = new ArrayList<Criteria>();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public void setOrderByClause(String orderByClause) {
        this.orderByClause = orderByClause;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public String getOrderByClause() {
        return orderByClause;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public void setDistinct(boolean distinct) {
        this.distinct = distinct;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public boolean isDistinct() {
        return distinct;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public List<Criteria> getOredCriteria() {
        return oredCriteria;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public void or(Criteria criteria) {
        oredCriteria.add(criteria);
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public Criteria or() {
        Criteria criteria = createCriteriaInternal();
        oredCriteria.add(criteria);
        return criteria;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public Criteria createCriteria() {
        Criteria criteria = createCriteriaInternal();
        if (oredCriteria.size() == 0) {
            oredCriteria.add(criteria);
        }
        return criteria;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    protected Criteria createCriteriaInternal() {
        Criteria criteria = new Criteria();
        return criteria;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public void clear() {
        oredCriteria.clear();
        orderByClause = null;
        distinct = false;
    }

    /**
     * This class was generated by MyBatis Generator.
     * This class corresponds to the database table t_user
     *
     * @mbg.generated
     */
    protected abstract static class GeneratedCriteria {
        protected List<Criterion> criteria;

        protected GeneratedCriteria() {
            super();
            criteria = new ArrayList<Criterion>();
        }

        public boolean isValid() {
            return criteria.size() > 0;
        }

        public List<Criterion> getAllCriteria() {
            return criteria;
        }

        public List<Criterion> getCriteria() {
            return criteria;
        }

        protected void addCriterion(String condition) {
            if (condition == null) {
                throw new RuntimeException("Value for condition cannot be null");
            }
            criteria.add(new Criterion(condition));
        }

        protected void addCriterion(String condition, Object value, String property) {
            if (value == null) {
                throw new RuntimeException("Value for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition, value));
        }

        protected void addCriterion(String condition, Object value1, Object value2, String property) {
            if (value1 == null || value2 == null) {
                throw new RuntimeException("Between values for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition, value1, value2));
        }

        public Criteria andIdIsNull() {
            addCriterion("id is null");
            return (Criteria) this;
        }

        public Criteria andIdIsNotNull() {
            addCriterion("id is not null");
            return (Criteria) this;
        }

        public Criteria andIdEqualTo(Integer value) {
            addCriterion("id =", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdNotEqualTo(Integer value) {
            addCriterion("id <>", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdGreaterThan(Integer value) {
            addCriterion("id >", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdGreaterThanOrEqualTo(Integer value) {
            addCriterion("id >=", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdLessThan(Integer value) {
            addCriterion("id <", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdLessThanOrEqualTo(Integer value) {
            addCriterion("id <=", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdIn(List<Integer> values) {
            addCriterion("id in", values, "id");
            return (Criteria) this;
        }

        public Criteria andIdNotIn(List<Integer> values) {
            addCriterion("id not in", values, "id");
            return (Criteria) this;
        }

        public Criteria andIdBetween(Integer value1, Integer value2) {
            addCriterion("id between", value1, value2, "id");
            return (Criteria) this;
        }

        public Criteria andIdNotBetween(Integer value1, Integer value2) {
            addCriterion("id not between", value1, value2, "id");
            return (Criteria) this;
        }

        public Criteria andUserNameIsNull() {
            addCriterion("user_name is null");
            return (Criteria) this;
        }

        public Criteria andUserNameIsNotNull() {
            addCriterion("user_name is not null");
            return (Criteria) this;
        }

        public Criteria andUserNameEqualTo(String value) {
            addCriterion("user_name =", value, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameNotEqualTo(String value) {
            addCriterion("user_name <>", value, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameGreaterThan(String value) {
            addCriterion("user_name >", value, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameGreaterThanOrEqualTo(String value) {
            addCriterion("user_name >=", value, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameLessThan(String value) {
            addCriterion("user_name <", value, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameLessThanOrEqualTo(String value) {
            addCriterion("user_name <=", value, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameLike(String value) {
            addCriterion("user_name like", value, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameNotLike(String value) {
            addCriterion("user_name not like", value, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameIn(List<String> values) {
            addCriterion("user_name in", values, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameNotIn(List<String> values) {
            addCriterion("user_name not in", values, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameBetween(String value1, String value2) {
            addCriterion("user_name between", value1, value2, "userName");
            return (Criteria) this;
        }

        public Criteria andUserNameNotBetween(String value1, String value2) {
            addCriterion("user_name not between", value1, value2, "userName");
            return (Criteria) this;
        }

        public Criteria andRealNameIsNull() {
            addCriterion("real_name is null");
            return (Criteria) this;
        }

        public Criteria andRealNameIsNotNull() {
            addCriterion("real_name is not null");
            return (Criteria) this;
        }

        public Criteria andRealNameEqualTo(String value) {
            addCriterion("real_name =", value, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameNotEqualTo(String value) {
            addCriterion("real_name <>", value, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameGreaterThan(String value) {
            addCriterion("real_name >", value, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameGreaterThanOrEqualTo(String value) {
            addCriterion("real_name >=", value, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameLessThan(String value) {
            addCriterion("real_name <", value, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameLessThanOrEqualTo(String value) {
            addCriterion("real_name <=", value, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameLike(String value) {
            addCriterion("real_name like", value, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameNotLike(String value) {
            addCriterion("real_name not like", value, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameIn(List<String> values) {
            addCriterion("real_name in", values, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameNotIn(List<String> values) {
            addCriterion("real_name not in", values, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameBetween(String value1, String value2) {
            addCriterion("real_name between", value1, value2, "realName");
            return (Criteria) this;
        }

        public Criteria andRealNameNotBetween(String value1, String value2) {
            addCriterion("real_name not between", value1, value2, "realName");
            return (Criteria) this;
        }

        public Criteria andSexIsNull() {
            addCriterion("sex is null");
            return (Criteria) this;
        }

        public Criteria andSexIsNotNull() {
            addCriterion("sex is not null");
            return (Criteria) this;
        }

        public Criteria andSexEqualTo(Byte value) {
            addCriterion("sex =", value, "sex");
            return (Criteria) this;
        }

        public Criteria andSexNotEqualTo(Byte value) {
            addCriterion("sex <>", value, "sex");
            return (Criteria) this;
        }

        public Criteria andSexGreaterThan(Byte value) {
            addCriterion("sex >", value, "sex");
            return (Criteria) this;
        }

        public Criteria andSexGreaterThanOrEqualTo(Byte value) {
            addCriterion("sex >=", value, "sex");
            return (Criteria) this;
        }

        public Criteria andSexLessThan(Byte value) {
            addCriterion("sex <", value, "sex");
            return (Criteria) this;
        }

        public Criteria andSexLessThanOrEqualTo(Byte value) {
            addCriterion("sex <=", value, "sex");
            return (Criteria) this;
        }

        public Criteria andSexIn(List<Byte> values) {
            addCriterion("sex in", values, "sex");
            return (Criteria) this;
        }

        public Criteria andSexNotIn(List<Byte> values) {
            addCriterion("sex not in", values, "sex");
            return (Criteria) this;
        }

        public Criteria andSexBetween(Byte value1, Byte value2) {
            addCriterion("sex between", value1, value2, "sex");
            return (Criteria) this;
        }

        public Criteria andSexNotBetween(Byte value1, Byte value2) {
            addCriterion("sex not between", value1, value2, "sex");
            return (Criteria) this;
        }

        public Criteria andMobileIsNull() {
            addCriterion("mobile is null");
            return (Criteria) this;
        }

        public Criteria andMobileIsNotNull() {
            addCriterion("mobile is not null");
            return (Criteria) this;
        }

        public Criteria andMobileEqualTo(String value) {
            addCriterion("mobile =", value, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileNotEqualTo(String value) {
            addCriterion("mobile <>", value, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileGreaterThan(String value) {
            addCriterion("mobile >", value, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileGreaterThanOrEqualTo(String value) {
            addCriterion("mobile >=", value, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileLessThan(String value) {
            addCriterion("mobile <", value, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileLessThanOrEqualTo(String value) {
            addCriterion("mobile <=", value, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileLike(String value) {
            addCriterion("mobile like", value, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileNotLike(String value) {
            addCriterion("mobile not like", value, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileIn(List<String> values) {
            addCriterion("mobile in", values, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileNotIn(List<String> values) {
            addCriterion("mobile not in", values, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileBetween(String value1, String value2) {
            addCriterion("mobile between", value1, value2, "mobile");
            return (Criteria) this;
        }

        public Criteria andMobileNotBetween(String value1, String value2) {
            addCriterion("mobile not between", value1, value2, "mobile");
            return (Criteria) this;
        }

        public Criteria andEmailIsNull() {
            addCriterion("email is null");
            return (Criteria) this;
        }

        public Criteria andEmailIsNotNull() {
            addCriterion("email is not null");
            return (Criteria) this;
        }

        public Criteria andEmailEqualTo(String value) {
            addCriterion("email =", value, "email");
            return (Criteria) this;
        }

        public Criteria andEmailNotEqualTo(String value) {
            addCriterion("email <>", value, "email");
            return (Criteria) this;
        }

        public Criteria andEmailGreaterThan(String value) {
            addCriterion("email >", value, "email");
            return (Criteria) this;
        }

        public Criteria andEmailGreaterThanOrEqualTo(String value) {
            addCriterion("email >=", value, "email");
            return (Criteria) this;
        }

        public Criteria andEmailLessThan(String value) {
            addCriterion("email <", value, "email");
            return (Criteria) this;
        }

        public Criteria andEmailLessThanOrEqualTo(String value) {
            addCriterion("email <=", value, "email");
            return (Criteria) this;
        }

        public Criteria andEmailLike(String value) {
            addCriterion("email like", value, "email");
            return (Criteria) this;
        }

        public Criteria andEmailNotLike(String value) {
            addCriterion("email not like", value, "email");
            return (Criteria) this;
        }

        public Criteria andEmailIn(List<String> values) {
            addCriterion("email in", values, "email");
            return (Criteria) this;
        }

        public Criteria andEmailNotIn(List<String> values) {
            addCriterion("email not in", values, "email");
            return (Criteria) this;
        }

        public Criteria andEmailBetween(String value1, String value2) {
            addCriterion("email between", value1, value2, "email");
            return (Criteria) this;
        }

        public Criteria andEmailNotBetween(String value1, String value2) {
            addCriterion("email not between", value1, value2, "email");
            return (Criteria) this;
        }

        public Criteria andNoteIsNull() {
            addCriterion("note is null");
            return (Criteria) this;
        }

        public Criteria andNoteIsNotNull() {
            addCriterion("note is not null");
            return (Criteria) this;
        }

        public Criteria andNoteEqualTo(String value) {
            addCriterion("note =", value, "note");
            return (Criteria) this;
        }

        public Criteria andNoteNotEqualTo(String value) {
            addCriterion("note <>", value, "note");
            return (Criteria) this;
        }

        public Criteria andNoteGreaterThan(String value) {
            addCriterion("note >", value, "note");
            return (Criteria) this;
        }

        public Criteria andNoteGreaterThanOrEqualTo(String value) {
            addCriterion("note >=", value, "note");
            return (Criteria) this;
        }

        public Criteria andNoteLessThan(String value) {
            addCriterion("note <", value, "note");
            return (Criteria) this;
        }

        public Criteria andNoteLessThanOrEqualTo(String value) {
            addCriterion("note <=", value, "note");
            return (Criteria) this;
        }

        public Criteria andNoteLike(String value) {
            addCriterion("note like", value, "note");
            return (Criteria) this;
        }

        public Criteria andNoteNotLike(String value) {
            addCriterion("note not like", value, "note");
            return (Criteria) this;
        }

        public Criteria andNoteIn(List<String> values) {
            addCriterion("note in", values, "note");
            return (Criteria) this;
        }

        public Criteria andNoteNotIn(List<String> values) {
            addCriterion("note not in", values, "note");
            return (Criteria) this;
        }

        public Criteria andNoteBetween(String value1, String value2) {
            addCriterion("note between", value1, value2, "note");
            return (Criteria) this;
        }

        public Criteria andNoteNotBetween(String value1, String value2) {
            addCriterion("note not between", value1, value2, "note");
            return (Criteria) this;
        }

        public Criteria andPositionIdIsNull() {
            addCriterion("position_id is null");
            return (Criteria) this;
        }

        public Criteria andPositionIdIsNotNull() {
            addCriterion("position_id is not null");
            return (Criteria) this;
        }

        public Criteria andPositionIdEqualTo(Integer value) {
            addCriterion("position_id =", value, "positionId");
            return (Criteria) this;
        }

        public Criteria andPositionIdNotEqualTo(Integer value) {
            addCriterion("position_id <>", value, "positionId");
            return (Criteria) this;
        }

        public Criteria andPositionIdGreaterThan(Integer value) {
            addCriterion("position_id >", value, "positionId");
            return (Criteria) this;
        }

        public Criteria andPositionIdGreaterThanOrEqualTo(Integer value) {
            addCriterion("position_id >=", value, "positionId");
            return (Criteria) this;
        }

        public Criteria andPositionIdLessThan(Integer value) {
            addCriterion("position_id <", value, "positionId");
            return (Criteria) this;
        }

        public Criteria andPositionIdLessThanOrEqualTo(Integer value) {
            addCriterion("position_id <=", value, "positionId");
            return (Criteria) this;
        }

        public Criteria andPositionIdIn(List<Integer> values) {
            addCriterion("position_id in", values, "positionId");
            return (Criteria) this;
        }

        public Criteria andPositionIdNotIn(List<Integer> values) {
            addCriterion("position_id not in", values, "positionId");
            return (Criteria) this;
        }

        public Criteria andPositionIdBetween(Integer value1, Integer value2) {
            addCriterion("position_id between", value1, value2, "positionId");
            return (Criteria) this;
        }

        public Criteria andPositionIdNotBetween(Integer value1, Integer value2) {
            addCriterion("position_id not between", value1, value2, "positionId");
            return (Criteria) this;
        }
    }

    /**
     * This class was generated by MyBatis Generator.
     * This class corresponds to the database table t_user
     *
     * @mbg.generated do_not_delete_during_merge
     */
    public static class Criteria extends GeneratedCriteria {

        protected Criteria() {
            super();
        }
    }

    /**
     * This class was generated by MyBatis Generator.
     * This class corresponds to the database table t_user
     *
     * @mbg.generated
     */
    public static class Criterion {
        private String condition;

        private Object value;

        private Object secondValue;

        private boolean noValue;

        private boolean singleValue;

        private boolean betweenValue;

        private boolean listValue;

        private String typeHandler;

        public String getCondition() {
            return condition;
        }

        public Object getValue() {
            return value;
        }

        public Object getSecondValue() {
            return secondValue;
        }

        public boolean isNoValue() {
            return noValue;
        }

        public boolean isSingleValue() {
            return singleValue;
        }

        public boolean isBetweenValue() {
            return betweenValue;
        }

        public boolean isListValue() {
            return listValue;
        }

        public String getTypeHandler() {
            return typeHandler;
        }

        protected Criterion(String condition) {
            super();
            this.condition = condition;
            this.typeHandler = null;
            this.noValue = true;
        }

        protected Criterion(String condition, Object value, String typeHandler) {
            super();
            this.condition = condition;
            this.value = value;
            this.typeHandler = typeHandler;
            if (value instanceof List<?>) {
                this.listValue = true;
            } else {
                this.singleValue = true;
            }
        }

        protected Criterion(String condition, Object value) {
            this(condition, value, null);
        }

        protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {
            super();
            this.condition = condition;
            this.value = value;
            this.secondValue = secondValue;
            this.typeHandler = typeHandler;
            this.betweenValue = true;
        }

        protected Criterion(String condition, Object value, Object secondValue) {
            this(condition, value, secondValue, null);
        }
    }
}

2）TUserMapper.java

package com.enjoylearning.mybatis.mapper;

import com.enjoylearning.mybatis.entity.TUser;
import com.enjoylearning.mybatis.entity.TUserExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;

public interface TUserMapper {
    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    long countByExample(TUserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    int deleteByExample(TUserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    int deleteByPrimaryKey(Integer id);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    int insert(TUser record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    int insertSelective(TUser record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    List<TUser> selectByExample(TUserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    TUser selectByPrimaryKey(Integer id);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    int updateByExampleSelective(@Param("record") TUser record, @Param("example") TUserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    int updateByExample(@Param("record") TUser record, @Param("example") TUserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    int updateByPrimaryKeySelective(TUser record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbg.generated
     */
    int updateByPrimaryKey(TUser record);
}

3）TUserMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.enjoylearning.mybatis.mapper.TUserMapper">
  <resultMap id="BaseResultMap" type="com.enjoylearning.mybatis.entity.TUser">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    <id column="id" jdbcType="INTEGER" property="id" />
    <result column="user_name" jdbcType="VARCHAR" property="userName" />
    <result column="real_name" jdbcType="VARCHAR" property="realName" />
    <result column="sex" jdbcType="TINYINT" property="sex" />
    <result column="mobile" jdbcType="VARCHAR" property="mobile" />
    <result column="email" jdbcType="VARCHAR" property="email" />
    <result column="note" jdbcType="VARCHAR" property="note" />
    <result column="position_id" jdbcType="INTEGER" property="positionId" />
  </resultMap>
  <sql id="Example_Where_Clause">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    <where>
      <foreach collection="oredCriteria" item="criteria" separator="or">
        <if test="criteria.valid">
          <trim prefix="(" prefixOverrides="and" suffix=")">
            <foreach collection="criteria.criteria" item="criterion">
              <choose>
                <when test="criterion.noValue">
                  and ${criterion.condition}
                </when>
                <when test="criterion.singleValue">
                  and ${criterion.condition} #{criterion.value}
                </when>
                <when test="criterion.betweenValue">
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                </when>
                <when test="criterion.listValue">
                  and ${criterion.condition}
                  <foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
                    #{listItem}
                  </foreach>
                </when>
              </choose>
            </foreach>
          </trim>
        </if>
      </foreach>
    </where>
  </sql>
  <sql id="Update_By_Example_Where_Clause">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    <where>
      <foreach collection="example.oredCriteria" item="criteria" separator="or">
        <if test="criteria.valid">
          <trim prefix="(" prefixOverrides="and" suffix=")">
            <foreach collection="criteria.criteria" item="criterion">
              <choose>
                <when test="criterion.noValue">
                  and ${criterion.condition}
                </when>
                <when test="criterion.singleValue">
                  and ${criterion.condition} #{criterion.value}
                </when>
                <when test="criterion.betweenValue">
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                </when>
                <when test="criterion.listValue">
                  and ${criterion.condition}
                  <foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
                    #{listItem}
                  </foreach>
                </when>
              </choose>
            </foreach>
          </trim>
        </if>
      </foreach>
    </where>
  </sql>
  <sql id="Base_Column_List">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    id, user_name, real_name, sex, mobile, email, note, position_id
  </sql>
  <select id="selectByExample" parameterType="com.enjoylearning.mybatis.entity.TUserExample" resultMap="BaseResultMap">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    select
    <if test="distinct">
      distinct
    </if>
    <include refid="Base_Column_List" />
    from t_user
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
    <if test="orderByClause != null">
      order by ${orderByClause}
    </if>
  </select>
  <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    select 
    <include refid="Base_Column_List" />
    from t_user
    where id = #{id,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    delete from t_user
    where id = #{id,jdbcType=INTEGER}
  </delete>
  <delete id="deleteByExample" parameterType="com.enjoylearning.mybatis.entity.TUserExample">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    delete from t_user
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </delete>
  <insert id="insert" parameterType="com.enjoylearning.mybatis.entity.TUser">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    <selectKey keyProperty="id" order="BEFORE" resultType="java.lang.Integer">
      SELECT LAST_INSERT_ID()
    </selectKey>
    insert into t_user (id, user_name, real_name, 
      sex, mobile, email, 
      note, position_id)
    values (#{id,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR}, #{realName,jdbcType=VARCHAR}, 
      #{sex,jdbcType=TINYINT}, #{mobile,jdbcType=VARCHAR}, #{email,jdbcType=VARCHAR}, 
      #{note,jdbcType=VARCHAR}, #{positionId,jdbcType=INTEGER})
  </insert>
  <insert id="insertSelective" parameterType="com.enjoylearning.mybatis.entity.TUser">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    <selectKey keyProperty="id" order="BEFORE" resultType="java.lang.Integer">
      SELECT LAST_INSERT_ID()
    </selectKey>
    insert into t_user
    <trim prefix="(" suffix=")" suffixOverrides=",">
      id,
      <if test="userName != null">
        user_name,
      </if>
      <if test="realName != null">
        real_name,
      </if>
      <if test="sex != null">
        sex,
      </if>
      <if test="mobile != null">
        mobile,
      </if>
      <if test="email != null">
        email,
      </if>
      <if test="note != null">
        note,
      </if>
      <if test="positionId != null">
        position_id,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      #{id,jdbcType=INTEGER},
      <if test="userName != null">
        #{userName,jdbcType=VARCHAR},
      </if>
      <if test="realName != null">
        #{realName,jdbcType=VARCHAR},
      </if>
      <if test="sex != null">
        #{sex,jdbcType=TINYINT},
      </if>
      <if test="mobile != null">
        #{mobile,jdbcType=VARCHAR},
      </if>
      <if test="email != null">
        #{email,jdbcType=VARCHAR},
      </if>
      <if test="note != null">
        #{note,jdbcType=VARCHAR},
      </if>
      <if test="positionId != null">
        #{positionId,jdbcType=INTEGER},
      </if>
    </trim>
  </insert>
  <select id="countByExample" parameterType="com.enjoylearning.mybatis.entity.TUserExample" resultType="java.lang.Long">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    select count(*) from t_user
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </select>
  <update id="updateByExampleSelective" parameterType="map">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    update t_user
    <set>
      <if test="record.id != null">
        id = #{record.id,jdbcType=INTEGER},
      </if>
      <if test="record.userName != null">
        user_name = #{record.userName,jdbcType=VARCHAR},
      </if>
      <if test="record.realName != null">
        real_name = #{record.realName,jdbcType=VARCHAR},
      </if>
      <if test="record.sex != null">
        sex = #{record.sex,jdbcType=TINYINT},
      </if>
      <if test="record.mobile != null">
        mobile = #{record.mobile,jdbcType=VARCHAR},
      </if>
      <if test="record.email != null">
        email = #{record.email,jdbcType=VARCHAR},
      </if>
      <if test="record.note != null">
        note = #{record.note,jdbcType=VARCHAR},
      </if>
      <if test="record.positionId != null">
        position_id = #{record.positionId,jdbcType=INTEGER},
      </if>
    </set>
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByExample" parameterType="map">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    update t_user
    set id = #{record.id,jdbcType=INTEGER},
      user_name = #{record.userName,jdbcType=VARCHAR},
      real_name = #{record.realName,jdbcType=VARCHAR},
      sex = #{record.sex,jdbcType=TINYINT},
      mobile = #{record.mobile,jdbcType=VARCHAR},
      email = #{record.email,jdbcType=VARCHAR},
      note = #{record.note,jdbcType=VARCHAR},
      position_id = #{record.positionId,jdbcType=INTEGER}
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByPrimaryKeySelective" parameterType="com.enjoylearning.mybatis.entity.TUser">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    update t_user
    <set>
      <if test="userName != null">
        user_name = #{userName,jdbcType=VARCHAR},
      </if>
      <if test="realName != null">
        real_name = #{realName,jdbcType=VARCHAR},
      </if>
      <if test="sex != null">
        sex = #{sex,jdbcType=TINYINT},
      </if>
      <if test="mobile != null">
        mobile = #{mobile,jdbcType=VARCHAR},
      </if>
      <if test="email != null">
        email = #{email,jdbcType=VARCHAR},
      </if>
      <if test="note != null">
        note = #{note,jdbcType=VARCHAR},
      </if>
      <if test="positionId != null">
        position_id = #{positionId,jdbcType=INTEGER},
      </if>
    </set>
    where id = #{id,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.enjoylearning.mybatis.entity.TUser">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    update t_user
    set user_name = #{userName,jdbcType=VARCHAR},
      real_name = #{realName,jdbcType=VARCHAR},
      sex = #{sex,jdbcType=TINYINT},
      mobile = #{mobile,jdbcType=VARCHAR},
      email = #{email,jdbcType=VARCHAR},
      note = #{note,jdbcType=VARCHAR},
      position_id = #{positionId,jdbcType=INTEGER}
    where id = #{id,jdbcType=INTEGER}
  </update>
</mapper>

Criteria为条件集合。
4）测试代码：

private SqlSessionFactory sqlSessionFactory;
	
	

	@Before
	public void init() throws IOException {
		
		String resource = "mybatis-config.xml";
		InputStream inputStream = Resources.getResourceAsStream(resource);
		// 1.读取mybatis配置文件创SqlSessionFactory
		sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
		inputStream.close();
	}


	@Test
	public void testQueryExample(){
		// 2.获取sqlSession
		SqlSession sqlSession = sqlSessionFactory.openSession();
		// 3.获取对应mapper
		TUserMapper mapper = sqlSession.getMapper(TUserMapper.class);
		// 4.执行查询语句并返回结果
		TUserExample example = new TUserExample();
		Criteria criteria = example.createCriteria();
		criteria.andEmailLike("%163.com");
		criteria.andSexEqualTo((byte) 2);
		
		List<TUser> selectByExample = mapper.selectByExample(example);
		System.out.println(selectByExample);

	}