pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.henu</groupId><artifactId>mybatis01_plus</artifactId><version>1.0-SNAPSHOT</version><packaging>jar</packaging><dependencies><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.4.5</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.6</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.10</version></dependency></dependencies></project>

MybatisConfig.xml

<?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><typeAliases><typeAlias type="com.henu.bean.User" alias="User" /></typeAliases><environments default="mysql"><environment id="mysql"><transactionManager type="JDBC"></transactionManager><dataSource type="POOLED"><property name="driver" value="com.mysql.jdbc.Driver"></property><property name="url" value="jdbc:mysql://localhost:3306/mybatisplus"></property><property name="username" value="root"></property><property name="password" value="123456"></property></dataSource></environment></environments><mappers><mapper resource="com/henu/bean/User.xml"></mapper></mappers></configuration>

User.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.henu.bean.User"><insert id="insertUser">insert into user values (3,'往冬','123456')</insert><insert id="addUser" parameterType="User">insert into user values (#{id},#{username},#{password})</insert><delete id="delUser" parameterType="int">delete from user where id=#{id}</delete><update id="updUser" parameterType="User">update user set username=#{username},password=#{password} where id=#{id}</update><select id="findAll" resultType="User" >select * from user</select><select id="findUserById" parameterType="int" resultType="User" >select * from user where id=#{id}</select><select id="findUserByUsername" parameterType="String" resultType="User" >select * from user where username like concat('%',#{username},'%')</select><!-- eg:根据姓名和密码查询 --><select id="findUserByCondition" parameterType="java.util.Map" resultType="User" >select * from user where username = #{username} and password = #{password}</select></mapper>

bean

package com.henu.bean;import java.io.Serializable;/*** @author George* @description**/
public class User implements Serializable {private String id;private String username;private String password;public User() {}public User(String id, String username, String password) {this.id = id;this.username = username;this.password = password;}public String getId() {return id;}public void setId(String id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}@Overridepublic String toString() {return "User{" +"id='" + id + '\'' +", username='" + username + '\'' +", password='" + password + '\'' +'}';}
}

MybatisTest

package com.henu.test;import com.henu.bean.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;/*** @author George* @description**/
public class MybatisTest {private static InputStream is;private static SqlSessionFactoryBuilder builder;private static SqlSessionFactory factory;private static SqlSession sqlSession;@Beforepublic void init() throws IOException {is = Resources.getResourceAsStream("MybatisConfig.xml");builder = new SqlSessionFactoryBuilder();factory = builder.build(is);sqlSession = factory.openSession();}@Afterpublic void destory() throws IOException {sqlSession.close();is.close();}@Testpublic void insertUser() {sqlSession.insert("insertUser");sqlSession.commit();//针对增删改，必须提交事务System.out.println("successful commit");}@Testpublic void addUser(){User user = new User("4","李太","56345");sqlSession.insert("addUser",user);sqlSession.commit();System.out.println("success commit");}@Testpublic void delUser(){sqlSession.delete("delUser",1);sqlSession.commit();System.out.println("success commit");}@Testpublic void updUser(){User user = new User("3","天使","56345");sqlSession.delete("updUser",user);sqlSession.commit();System.out.println("success commit");}/*查询并不对表做出改变，所以不需要提交事务*/@Testpublic void findAll(){List<User> list = sqlSession.selectList("findAll");for (User user : list) {System.out.println(user);}System.out.println("success commit");}@Testpublic void findUserById(){User user = sqlSession.selectOne("findUserById",2);System.out.println(user);System.out.println("success commit");}@Testpublic void findUserByUsername(){List<User> list = sqlSession.selectList("findUserByUsername", "乔");for (User user : list) {System.out.println(user);}System.out.println("success commit");}@Testpublic void findUserByCondition(){Map map = new HashMap();map.put("username","乔治");map.put("password","123456");List<User> list = sqlSession.selectList("findUserByCondition", map);for (User user : list) {System.out.println(user);}System.out.println("success commit");}}

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mybatis实现CRUD（不使用DAO）

pom.xml

MybatisConfig.xml

User.xml

bean

MybatisTest

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