mybatis-基于anno的crud
作者：互联网
创建maven工程
mybatis-anno/
|-src/
| |-main/
| | |-java/
| | |-resources/
| |-test/
|-pom.xml
- mybatis-anno/：项目目录
- mybatis-anno/src/：java类路径
- mybatis-anno/src/main/：此处就是java代码，如pojo，mapper
- mybatis-anno/src/resources/：此处存放mybatis-config.xml（mybatis主配置文件）和（jdbcConfig.properties数据库连接文件）...
- mybatis-anno/src/test/：测试
添加依赖
在pom.xml文件中，添加需要的依赖
<?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>org.example</groupId>
<artifactId>mybatis-anno</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>9</maven.compiler.source>
<maven.compiler.target>9</maven.compiler.target>
</properties>
<dependencies>
<!-- mybatis 核心依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.7</version>
</dependency>
<!-- mysql8驱动依赖-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.25</version>
</dependency>
<!-- junit4测试依赖-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>RELEASE</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
创建pojo类
在main/java/中创建com/mybatis_anno/pojo/User类
main/java/com/mybatis_anno/pojo/User.class
package com.mybatis_anno.pojo;
public class User implements Serializable{//对应user表
private Integer uid; //对应uid
private String uname;//对应uname
private String usex;//对应usex
private Integer uage;//对应uage
public User() {
}
public User(Integer uid, String uname, String usex, Integer uage) {
this.uid = uid;
this.uname = uname;
this.usex = usex;
this.uage = uage;
}
public Integer getUid() {
return uid;
}
public void setUid(Integer uid) {
this.uid = uid;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getUsex() {
return usex;
}
public void setUsex(String usex) {
this.usex = usex;
}
public Integer getUage() {
return uage;
}
public void setUage(Integer uage) {
this.uage = uage;
}
@Override
public String toString() {
return "User{" +
"uid=" + uid +
", uname='" + uname + '\'' +
", usex='" + usex + '\'' +
", uage=" + uage +
'}';
}
}
创建mapper接口
在main/java/中创建com/mybatis_anno/mapper/IUserMapper接口
main/java/com/mybatis_anno/mapper/IUserMapper.class
package com.mybatis_anno.mapper;
import com.mybatis_anno.pojo.User;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import java.util.List;
public interface IUserMapper {
@Select("select * from user")
List<User> findUserAll();
@Select("select * from user where uid=#{uid}")
User findUserById(Integer userId);
@Select("select * from user where uname like #{uname}")
List<User> findUserByName(String userName);
@Insert("insert into user(uname,usex,uage) value(#{uname},#{usex},#{uage})")
int saveUser(User user);
@Update("update user set uname=#{uname},usex=#{usex},uage=#{uage} where uid=#{uid}")
int updateUser(User user);
@Delete("delete from user where uid=#{uid}")
int deleteUser(Integer userId);
@Select("select count(*) from user")
int findUserAllTotal();
}
创建主配置文件
在resources中创建mybatis-config.xml和jdbcConfig.properties
resources/mybatis-config.xml
resources/jdbcConfig.properties
<?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>
<!-- 配置数据库连接-->
<properties resource="jdbcConfig.properties"></properties>
<!-- 配置别名-->
<typeAliases>
<package name="com.mybatis_anno.pojo"/>
</typeAliases>
<!-- 配置环境-->
<environments default="mysql">
<environment id="mysql">
<transactionManager type="JDBC"></transactionManager>
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<!-- 配置映射文件-->
<mappers>
<package name="com.mybatis_anno.mapper"/>
</mappers>
</configuration>
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC
jdbc.username=root
jdbc.password=root
创建测试类
在test/java中创建TestDemo.class
test/java/TestDemo.class
import com.mybatis_anno.mapper.IUserMapper;
import com.mybatis_anno.pojo.User;
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.After;
import org.junit.Before;
import org.junit.Test;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
public class TestDemo {
private InputStream is;
private SqlSessionFactory sqlSessionFactory;
private SqlSession session;
private IUserMapper userMapper;
@Before
public void init() throws IOException {
String resource = "mybatis-config.xml";
is = Resources.getResourceAsStream(resource);
session = new SqlSessionFactoryBuilder().build(is).openSession();
userMapper = session.getMapper(IUserMapper.class);
}
@After
public void destory() throws IOException {
session.commit();
session.close();
is.close();
}
@Test
public void testFindUserAll(){
List<User> users = userMapper.findUserAll();
System.out.println(users);
}
@Test
public void testFindUserById(){
User user = userMapper.findUserById(14);
System.out.println(user);
}
@Test
public void testFindUserByName(){
List<User> users = userMapper.findUserByName("%a%");
System.out.println(users);
}
@Test
public void testSaveUser(){
User user = new User();
user.setUname("afaf");
user.setUsex("afa");
user.setUage(24);
userMapper.saveUser(user);
}
@Test
public void testUpdateUser(){
User user = new User();
user.setUid(14);
user.setUname("akfka");
user.setUsex("sf");
user.setUage(141);
userMapper.updateUser(user);
}
@Test
public void testDelUser(){
userMapper.deleteUser(12);
}
@Test
public void testFindUserAllTotal(){
int total = userMapper.findUserAllTotal();
System.out.println(total);
}
}
标签：crud,anno,uname,user,mybatis,import,public 来源： https://www.cnblogs.com/bright-future/p/14800936.html