【注意点】

choose与if区别，只取第一个符合条件password并没有进入sql语句中

//【请注意】增删改必须提交事务。。。。。。。。。。。。。。。。。

在批量更新中需要将deconfig的配置文件url的尾部添加
即url=jdbc:mysql://localhost:3306/mybatisplus?allowMultiQueries=true

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>mybatis02_activeSql</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><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.12</version></dependency></dependencies></project>

dbconfig.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/mybatisplus?allowMultiQueries=true
name=root
password=123456

log4j.properties

# Global logging configuration
log4j.rootLogger=debug, stdout
# MyBatis logging configuration...
log4j.logger.cn.wolfcode.mybatis=TRACE
# 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

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><properties resource="dbconfig.properties"></properties><typeAliases><typeAlias type="com.henu.bean.User" alias="User" /><typeAlias type="com.henu.dao.UserDao" alias="UserDao" /></typeAliases><environments default="mysql"><environment id="mysql"><transactionManager type="JDBC"></transactionManager><dataSource type="POOLED"><property name="driver" value="${driver}"></property><property name="url" value="${url}"></property><property name="username" value="${name}"></property><property name="password" value="${password}"></property></dataSource></environment></environments><mappers><mapper resource="com/henu/dao/UserDao.xml"></mapper></mappers></configuration>

User

UserDao

package com.henu.dao;import com.henu.bean.User;import java.util.List;/*** @author George* @description**/
public interface UserDao {/*** 查询全部* @return*/List<User> findAll();/*** 根据不同条件查询* @return*/List<User> findUserByCondition(User user);/*** 根据不同条件查询* @return*/List<User> findUserByChoose(User user);/*** 更新用户* @param user* @return*/int updateUserBySet(User user);/*** 批量删除* @param list* @return*/int deleteUserByforeach(List<Integer> list);/*** 批量插入* @param list* @return*/int insertUserByForeach(List<User> list);/*** 批量更新* @param list* @return*/int updateUserByForeach(List<User> list);
}

UserDao.xml

MybatisTest

package com.henu.test;import com.henu.bean.User;
import com.henu.dao.UserDao;
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.ArrayList;
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 findAll(){UserDao userDao = sqlSession.getMapper(UserDao.class);List<User> users = userDao.findAll();for (User user : users) {System.out.println(user);}}@Testpublic void findUserByCondition(){UserDao userDao = sqlSession.getMapper(UserDao.class);User user = new User();user.setUsername("乔治");user.setPassword("123456");List<User> users = userDao.findUserByCondition(user);for (User u : users) {System.out.println(u);}}@Testpublic void findUserByChoose(){UserDao userDao = sqlSession.getMapper(UserDao.class);User user = new User();user.setUsername("乔治");//select * from user where 1 = 1 and username=?/*choose与if区别，只取第一个符合条件password并没有进入sql语句中*/user.setPassword("123456");List<User> users = userDao.findUserByChoose(user);for (User u : users) {System.out.println(u);}}@Testpublic void UpdateUserBySet(){UserDao userDao = sqlSession.getMapper(UserDao.class);User user = new User("2","魔鬼","56345");userDao.updateUserBySet(user);//【请注意】增删改必须提交事务。。。。。。。。。。。。。。。。。sqlSession.commit();System.out.println("success");}@Testpublic void deleteUserByforeach(){UserDao userDao = sqlSession.getMapper(UserDao.class);List<Integer> list = new ArrayList<Integer>();list.add(3);list.add(4);userDao.deleteUserByforeach(list);//【请注意】增删改必须提交事务。。。。。。。。。。。。。。。。。sqlSession.commit();System.out.println("success");}@Testpublic void insertUserByForeach(){UserDao userDao = sqlSession.getMapper(UserDao.class);List<User> list = new ArrayList<User>();list.add(new User("10","贝弗利","1224"));list.add(new User("11","黑贝","1224"));userDao.insertUserByForeach(list);//【请注意】增删改必须提交事务。。。。。。。。。。。。。。。。。sqlSession.commit();System.out.println("success");}@Testpublic void updateUserByForeach(){UserDao userDao = sqlSession.getMapper(UserDao.class);List<User> list = new ArrayList<User>();list.add(new User("10","ooxx","56345"));list.add(new User("11","xxoo","56345"));userDao.updateUserByForeach(list);sqlSession.commit();System.out.println("success");}}

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【注意点】

dbconfig.properties

log4j.properties

MybatisConfig.xml

User

UserDao

UserDao.xml

MybatisTest

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