package com.jdbc.demo;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class UseJDBC {
public static void main(String[] args){
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "system", "bruce123");
String sql = "select * from student where id = ?";
PreparedStatement ps = conn.prepareStatement(sql);
ps.setInt(1, 1);
ResultSet rs = ps.executeQuery();
while(rs.next()){
System.out.println(rs.getString("id") + "-" + rs.getString("name"));
}
} catch (ClassNotFoundException | SQLException e) {
e.printStackTrace();
}
}
}
package com.mybatis.demo;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import com.mybatis.domain.Student;
import com.mybatis.utils.SessionFactoryUtil;
public class StudentMybatis {
@Test
public void queryStudent(){
SqlSession sqlSession = SessionFactoryUtil.getSessionFactory().openSession(true);
Student s = sqlSession.selectOne("student.selectbyid", 5);
System.out.println(s);
sqlSession.close();
}
@Test
public void queryStudentsByIds(){
SqlSession sqlSession = SessionFactoryUtil.getSessionFactory().openSession(true);
//Integer[] ids = new Integer[]{1,2,3,4,5};
Map<String,Object> map = new HashMap<String, Object>();
map.put("ids", new Integer[]{1,2,3,4,5});
List<Integer> list = new ArrayList<Integer>();
list.add(1);
list.add(2);
list.add(3);
//map.put("ids", list);
List<Object> students = sqlSession.selectList("student.queryStudentsByIds", map);
for(Object s : students){
System.out.println(s);
}
sqlSession.close();
}
@Test
public void queryStus(){
SqlSession sqlSession = SessionFactoryUtil.getSessionFactory().openSession(true);
//List<Object> students = sqlSession.selectList("student.querybyname", "李小明");
List<Object> students = sqlSession.selectList("student.querybyname", "%小明%");
for(Object s : students){
System.out.println(s);
}
sqlSession.close();
}
@Test
public void queryStus2(){
SqlSession sqlSession = SessionFactoryUtil.getSessionFactory().openSession(true);
List<Object> students = sqlSession.selectList("student.querybyname2", "小明");
for(Object s : students){
System.out.println(s);
}
sqlSession.close();
}
@Test
public void queryStus3(){
SqlSession sqlSession = SessionFactoryUtil.getSessionFactory().openSession(true);
Student s = new Student();
//s.setId(12);
s.setName("%小明%");
//s.setBirthday(new Date());
//s.setSex("F");
//s.setAddress("北京市");
List<Object> students = sqlSession.selectList("student.querybyStudent", s);
for(Object o : students){
System.out.println(o);
}
sqlSession.close();
}
@Test
public void addStudent(){
SqlSession sqlSession = SessionFactoryUtil.getSessionFactory().openSession(true);
Student s = new Student();
s.setId(12);
s.setName("tom");
//s.setBirthday(new Date());
s.setSex("F");
//s.setAddress("北京市");
int code = sqlSession.insert("student.addStudent",s);
System.out.println(code);
sqlSession.close();
}
@Test
public void updateStudent(){
SqlSession sqlSession = SessionFactoryUtil.getSessionFactory().openSession(true);
Student s = new Student();
s.setId(10);
s.setName("jack");
//s.setBirthday(new Date());
//s.setSex("F");
s.setAddress("北京市西城区");
int code = sqlSession.update("student.updateStudent",s);
System.out.println(code);
sqlSession.close();
}
@Test
public void deleteStudent(){
SqlSession sqlSession = SessionFactoryUtil.getSessionFactory().openSession(true);
int code = sqlSession.delete("student.deleteStudent",2);
System.out.println(code);
sqlSession.close();
}
}
package com.mybatis.domain;
import java.util.Date;
public class Student {
private Integer id;
private String name;
private Date birthday;
private String sex;
private String address;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "Student [id=" + id + ", name=" + name + ", birthday="
+ birthday + ", sex=" + sex + ", address=" + address + "]";
}
}
package com.mybatis.utils;
import java.io.IOException;
import java.io.InputStream;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
public class SessionFactoryUtil {
public static SqlSessionFactory getSessionFactory(){
SqlSessionFactory sqlSessionFactory = null;
try {
// 1.加载核心配置文件
InputStream inputStream = Resources.getResourceAsStream("mybatis-config.xml");
// 2.读取配置文件的内容
SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
sqlSessionFactory = builder.build(inputStream);
} catch (IOException e) {
e.printStackTrace();
}
return sqlSessionFactory;
}
}
<?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="student">
<select id="selectbyid" parameterType="int" resultType="com.mybatis.domain.Student">
select * from student where id = #{id}
</select>
<select id="queryStudentsByIds" resultType="com.mybatis.domain.Student" parameterType="java.util.Map">
<!-- select * from student where id in #{ids} fail-->
<!-- select * from student where id in ${ids} fail-->
select * from student where id in
<foreach collection="ids" item="id" open="(" close=")" separator=",">
#{id}
</foreach>
</select>
<select id="querybyname" parameterType="string" resultType="com.mybatis.domain.Student">
select * from student where name like #{name}
</select>
<select id="querybyname2" parameterType="string" resultType="com.mybatis.domain.Student">
select * from student where name like '%${value}%'
</select>
<select id="querybyStudent" parameterType="com.mybatis.domain.Student" resultType="com.mybatis.domain.Student">
select * from student where 1=1
<if test= "id != null and id !=''">and id = #{id} </if>
<if test= "name != null and name !=''">and name like #{name} </if>
<if test= "sex != null and sex !=''">and sex = #{sex} </if>
</select>
<insert id="addStudent" parameterType="com.mybatis.domain.Student">
<!-- insert into student (id,name,birthday,sex,address) values (#{id},#{name},#{birthday},#{sex},#{address})-->
insert into student
<trim prefix= "(" suffix= ")" suffixOverrides= ",">
<if test= "id != null">id,</if>
<if test= "name != null">name,</if>
<if test= "birthday != null">birthday,</if>
<if test= "sex != null">sex,</if>
<if test= "address != null">address,</if>
</trim>
<trim prefix= "values (" suffix= ")" suffixOverrides= ",">
<if test= "id != null">#{id},</if>
<if test= "name != null">#{name},</if>
<if test= "birthday != null">#{birthday},</if>
<if test= "sex != null">#{sex},</if>
<if test= "address != null">#{address},</if>
</trim>
</insert>
<update id="updateStudent" parameterType="com.mybatis.domain.Student">
<!-- update student set name =#{name}, birthday=#{birthday},sex=#{sex},address=#{address} where id = #{id} -->
update student
<trim prefix="set" suffixOverrides=",">
<if test="name != null">name=#{name},</if>
<if test="birthday != null">birthday=#{birthday},</if>
<if test="sex != null">sex=#{sex},</if>
<if test="address != null">address=#{address},</if>
</trim>
where id = #{id}
</update>
<delete id="deleteStudent" parameterType="int">
delete from student where id = #{id}
</delete>
</mapper>
log4j.rootLogger=DEBUG,stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%l] [%p]:%m%n
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 运行环境配置 -->
<!--default属性：指定使用哪一个运行环境 -->
<environments default="development">
<!--id属性：唯一标识一个运行环境 -->
<environment id="development">
<!-- 事务管理器配置，type="JDBC"：mybatis框架默认使用jdbc事务 -->
<transactionManager type="JDBC" />
<!--数据源配置，type="POOLED"：mybatis框架提供的连接池 -->
<dataSource type="POOLED">
<property name="driver" value="oracle.jdbc.driver.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl" />
<property name="username" value="system" />
<property name="password" value="bruce123" />
</dataSource>
</environment>
</environments>
<!-- 加载映射文件 -->
<mappers>
<mapper resource="com/mybatis/xmlmapper/StudentMapper.xml"/>
</mappers>
</configuration>
