标签：.sql info 数据类型 har input char oid override log4
根据用户ID查询用户信息
根据用户名查找用户列表
添加用户
修改用户
删除用户
导入依赖jar包
配置SqlMapConfig.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>
<!--和spring整合后environments配置将废除-->
<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/test?useUnicode=true&characterEncoding=utf8" />
<property name="username" value="root" />
<property name="password" value="password" />
</dataSource>
</environment>
</environments>
<!--加载映射文件-->
<mappers>
<mapper resource="mybatis/user.xml"></mapper>
</mappers>
</configuration>
配置log4j.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
package com.tanlei.newer.pojo;
import java.util.Date;
/**
* @author:Mr.Tan
* @Create:2018-10-28-07-28
**/
public class User {
private int id;
private String username;// 用户姓名
private String sex;// 性别
private Date birthday;// 生日
private String address;// 地址
public User() {
}
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;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username=‘" + username + ‘\‘‘ +
", sex=‘" + sex + ‘\‘‘ +
", birthday=" + birthday +
", address=‘" + address + ‘\‘‘ +
‘}‘;
}
}
配置sql查询的映射文件
<?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"> <!--namespace:命名空间,用于隔离sql语句,后继有重要--> <!--#{}相当于jdbc的?--> <mapper namespace="user"> <!--id:sql id ,语句的唯一标识 parameterType: 入参的数据类型 resultSetType: 返回结果的数据类型 --> <select id="getUserById" parameterType="int" resultType="com.tanlei.newer.pojo.User"> SELECT id,username,birthday,sex,address FROM user WHERE id=#{id2} </select> </mapper>
编写测试程序,加载映射文件
package com.tanlei.newer.test;
import com.tanlei.newer.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.Test;
import java.io.IOException;
import java.io.InputStream;
/**
* @author:Mr.Tan
* @Create:2018-10-28-23-14
**/
public class MybatisTest {
@Test
public void testGetUserById() throws Exception {
//创建SqlSessionFactoryBuilder对象
SqlSessionFactoryBuilder ssfb=new SqlSessionFactoryBuilder();
//创建核心配置文件的输入流
InputStream inputStream=Resources.getResourceAsStream("SqlMapConfig.xml");
//通过输入流创建SqlSessionFactor对象
SqlSessionFactory sqlSessionFactor=ssfb.build(inputStream);
//创建sqlSession对象
SqlSession sqlsession=sqlSessionFactor.openSession();
//执行查询 参数一:sql id 参数二:入参=parameterType="int"
User user=sqlsession.selectOne("user.getUserById",10);
//输出用户
System.out.println(user);
//释放资源
sqlsession.close();
}
}
标签：.sql info 数据类型 har input char oid override log4
原文地址：https://www.cnblogs.com/tanlei-sxs/p/9868192.html
