mybatis实现增删改查xml配置和后端Java编程完整教程

mybatis实现增删改查xml配置和后端编程教程

SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration><environments default="development"><environment id="development"><!-- 使用jdbc事务管理 --><transactionManager type="JDBC"/><!-- 数据库连接池 --><dataSource type="POOLED"><property name="driver" value="com.mysql.jdbc.Driver"/><property name="url" value="jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8"/><property name="username" value="root"/><property name="password" value="011220"/></dataSource></environment></environments><mappers><mapper resource="sqlmap/user.xml"/></mappers></configuration>

user.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="test"><!-- 根据用户id查询用户信息 --><select id="findUserById" parameterType="int" resultType="cn.nwtxxb.mybatis.po.User">select * from user where id = #{id}</select><!-- 根据用户名查询用户信息 --><select id="findUserByUserName" parameterType="java.lang.String" resultType="cn.nwtxxb.mybatis.po.User">select * from user where username like '%${value}%'</select><!-- 添加用户 --><insert id="insertUser" parameterType="cn.nwtxxb.mybatis.po.User"><!-- selectKey将主键返回 --><selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">select LAST_INSERT_ID()</selectKey>insert into user (username,birthday,sex,address) values (#{username},#{birthday},#{sex},#{address})</insert><!-- 删除用户 --><delete id="deleteUserById" parameterType="int">delete from user where id=#{id}</delete></mapper>

User.java

package cn.nwtxxb.mybatis.po;import java.util.Date;public class User {private int id;private String username;private String sex;private Date birthday;private String address;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}@Overridepublic String toString() {return "User [id=" + id + ", username=" + username + ", sex=" + sex + ", birthday=" + birthday + ", address="+ address + "]";}}

测试类代码：

package cn.nwtxxb.mybatis.test;
import java.io.InputStream;
import java.util.Date;
import java.util.List;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;
import cn.nwtxxb.mybatis.po.User;
public class Mybatis_first {//会话工厂private SqlSessionFactory sqlSessionFactory;@Beforepublic void createSqlSessionFactory() throws Exception{//配置文件String resource = "SqlMapConfig.xml";InputStream inputStream = Resources.getResourceAsStream(resource);//使用SqlSessionFactoryBuilder从xml配置文件中创建SqlSessionFactorysqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);}//根据id查询用户信息@Testpublic void testFindUserById(){//数据库会话实例SqlSession sqlSession = null;try {//创建数据库会话实例sqlSessionsqlSession = sqlSessionFactory.openSession();//查询单个记录，根据用户id查询用户信息User user = sqlSession.selectOne("test.findUserById",10);//输出用户信息System.out.println(user);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{if(sqlSession!=null){sqlSession.close();}}}//根据用户名查询用户信息@Testpublic void testFindUserByUsername(){//数据库会话实例SqlSession sqlSession = null;try {//创建数据库会话实例sqlSessionsqlSession = sqlSessionFactory.openSession();//根据用户名中包含"张"的条件查询用户信息List<User> list = sqlSession.selectList("test.findUserByUserName","张");System.out.println(list.size());} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{if(sqlSession!=null){sqlSession.close();}}}//添加用户信息@Testpublic void testInsert(){//数据库会话实例SqlSession sqlSession = null;try {//创建数据库会话实例sqlSessionsqlSession = sqlSessionFactory.openSession();//添加用户信息User user = new User();user.setUsername("张磊");user.setSex("1");user.setAddress("襄城");user.setBirthday(new Date());sqlSession.insert("test.insertUser",user);//提交事务sqlSession.commit();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{if(sqlSession!=null){sqlSession.close();}}}//删除用户@Testpublic void testDelete(){//数据库会话实例SqlSession sqlSession = null;try {//创建数据库会话实例sqlSessionsqlSession = sqlSessionFactory.openSession();sqlSession.delete("test.deleteUserById",26);sqlSession.commit();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{if(sqlSession!=null){sqlSession.close();}}}
}

login4j.properties

# Global logging configuration
log4j.rootLogger=DEBUG,stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

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mybatis实现增删改查xml配置和后端Java编程完整教程

mybatis实现增删改查xml配置和后端编程教程

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