spring boot+mybatis逆向生成

1.添加依赖

        <!-- mybatis -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
          <!-- MyBatis 生成器 -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.3</version>
        </dependency>

2.自定义注释生成器

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.dom.java.Field;
import org.mybatis.generator.internal.DefaultCommentGenerator;
import org.mybatis.generator.internal.util.StringUtility;

import java.util.Properties;

/**
 * 自定义注释生成器
 * Created by macro on 2018/4/26.
 */
public class CommentGenerator extends DefaultCommentGenerator {
    private boolean addRemarkComments = false;

    /**
     * 设置用户配置的参数
     */
    @Override
    public void addConfigurationProperties(Properties properties) {
        super.addConfigurationProperties(properties);
        this.addRemarkComments = StringUtility.isTrue(properties.getProperty("addRemarkComments"));
    }

    /**
     * 给字段添加注释
     */
    @Override
    public void addFieldComment(Field field, IntrospectedTable introspectedTable,
                                IntrospectedColumn introspectedColumn) {
        String remarks = introspectedColumn.getRemarks();
        //根据参数和备注信息判断是否添加备注信息
        if(addRemarkComments&&StringUtility.stringHasValue(remarks)){
            //文档注释开始
            field.addJavaDocLine("/**");
            //获取数据库字段的备注信息
            String[] remarkLines = remarks.split(System.getProperty("line.separator"));
            for(String remarkLine:remarkLines){
                field.addJavaDocLine(" * "+remarkLine);
            }
            addJavadocTag(field, false);
            field.addJavaDocLine(" */");
        }
    }
}

2.用于生产MBG的代码（执行操作的代码）

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * 用于生产MBG的代码
 * Created by macro on 2018/4/26.
 */
public class Generator {
    public static void main(String[] args) throws Exception {
        //MBG 执行过程中的警告信息
        List<String> warnings = new ArrayList<String>();
        //当生成的代码重复时，覆盖原代码
        boolean overwrite = true;
        //读取我们的 MBG 配置文件
        InputStream is = Generator.class.getResourceAsStream("/generatorConfig.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(is);
        is.close();

        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        //创建 MBG
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        //执行生成代码
        myBatisGenerator.generate(null);
        //输出警告信息
        for (String warning : warnings) {
            System.out.println(warning);
        }
    }
}

3.数据库连接配置文件（generator.properties）

jdbc.driverClass=oracle.jdbc.OracleDriver
jdbc.connectionURL=jdbc:oracle:thin:@localhost:3306:orcl
jdbc.userId=root
jdbc.password=root

4.生成策略配置文件

<?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>
   <properties resource="generator.properties"/>
    <context id="MySqlContext" targetRuntime="MyBatis3Simple" defaultModelType="flat">

        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>
        <property name="javaFileEncoding" value="UTF-8"/>

        <!-- 为模型生成序列化方法-->
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>
        <!-- 为生成的Java模型创建一个toString方法 -->
        <plugin type="org.mybatis.generator.plugins.ToStringPlugin"/>

        <commentGenerator type="com.edu.cms.CommentGenerator">
            <!-- 是否去除自动生成的注释 true：是 ： false:否  不要轻易修改，关系到生成文件是否重复问题-->
            <property name="suppressAllComments" value="false"/>
            <property name="suppressDate" value="true"/>
            <property name="addRemarkComments" value="false"/>
        </commentGenerator>

        <jdbcConnection driverClass="oracle.jdbc.OracleDriver"
                        connectionURL="jdbc:oracle:thin:@10.111.96.21:1521:orcl"
                        userId="edugw5"
                        password="edugw5">
        </jdbcConnection>

		<!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL 和NUMERIC 类型解析为java.math.BigDecimal
		 	Oracle中number类型要设置长度，>18或者不设置长度将自动转换成BigDecimal-->
		<javaTypeResolver type="org.mybatis.generator.internal.types.JavaTypeResolverDefaultImpl">
			<property name="forceBigDecimals" value="false"/>
		</javaTypeResolver>


		<javaModelGenerator targetPackage="com.edu.cms.entity" targetProject=".\src\main\java"/>

        <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources"/>

        <javaClientGenerator type="XMLMAPPER" targetPackage="com.edu.cms.dao"
                             targetProject=".\src\main\java"/>
        <!--生成全部表tableName设为%，表名后面的参数表示不生成Example类文件-->
        <table tableName="table" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false"
			   enableSelectByExample="false" selectByExampleQueryId="false" >
			<!--<generatedKey column="id" sqlStatement="select SEQ_{1}.nextval from dual" identity="false" type="pre"/>-->
        </table>
    </context>
</generatorConfiguration>