使用mybatis完成增删改查日志信息
mysql数据库
create table t_user
(
uid int primary key auto_increment,
username varchar(20),
password varchar(20),
phone varchar(11),
address varchar(50)
);
insert into t_user(username,password,phone,address) values('张三','666','18965423548','南阳');
insert into t_user(username,password,phone,address) values('李四','333','18754263548','许昌');
insert into t_user(username,password,phone,address) values('小美','123','18565234759','信阳');mybatis所需jar包
创建包
在com.a.bean包在里面创建User实体类
package com.a.bean;
public class User {
private Integer uid;
private String username;
private String password;
private String phone;
private String address;
public Integer getUid() {
return uid;
}
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
public String getPhone() {
return phone;
}
public String getAddress() {
return address;
}
public void setUid(Integer uid) {
this.uid = uid;
}
public void setUsername(String username) {
this.username = username;
}
public void setPassword(String password) {
this.password = password;
}
public void setPhone(String phone) {
this.phone = phone;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "User{" +
"uid=" + uid +
", username='" + username + '\'' +
", password='" + password + '\'' +
", phone='" + phone + '\'' +
", address='" + address + '\'' +
'}';
}
}
创建mybatis.xml在里面配置环境信息
.在com.a.dao包中创建UserDao接口，在里面编写全查的代码
package com.a.dao;
import com.a.bean.User;
import java.util.List;
public interface UserDao {
List selectAll();
int userAdd(User user);
int delete(int uid);
User selectByuid(int uid);
int update(User user);
}
在com.a.dao包中创建UserDao.xml文件在里面设置映射和通过select标签进行查询
insert into t_user(username,password,phone,address) values(#{username},#{password},#{phone},#{address});
delete from t_user where uid=#{uid} ;
update t_user set username=#{username},password=#{password},phone=#{phone},address=#{address} where uid=#{uid}
在com.a.test包中创建测试类UserTest,测试查询
package com.a.test;
import com.a.bean.User;
import com.a.dao.UserDao;
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 UserTest {
//加载核心配置文件的字节输入流
InputStream stream =null;
//创建SqlSessionFactory的构建对象--框架使用的是构建者模式
SqlSessionFactoryBuilder builder = null;
//通过构建对象加载配置文件的输入流获取SqlSessionFactory
SqlSessionFactory factory = null;
//通过工厂对象获取SqlSession对象--执行JDBC的操作
SqlSession sqlSession = null;
//通过SqlSession对象获取接口对应的代理对象
UserDao userDao = null;
@Before
public void init() throws IOException {
//加载核心配置文件的字节输入流
stream = Resources.getResourceAsStream("mybatis.xml");
//创建SqlSessionFactory的构建对象--框架使用的是构建者模式
builder = new SqlSessionFactoryBuilder();
//通过构建对象加载配置文件的输入流获取SqlSessionFactory
factory = builder.build(stream);
//通过工厂对象获取SqlSession对象--执行JDBC的操作
sqlSession = factory.openSession();
//通过SqlSession对象获取接口对应的代理对象
userDao = sqlSession.getMapper(UserDao.class);
}
@Test
public void testSelectAll() throws IOException {
//通过代理对象执行查询方法
List userList = userDao.selectAll();
//遍历集合
for ( User user :userList){
System.out.println(user);
}
}
@Test
public void add() throws IOException {
User user = new User();
user.setUsername("aa");
user.setPassword("fdsf");
user.setPhone("10086");
user.setAddress("sdgdsf");
int i = userDao.userAdd(user);
if(i>0){
System.out.println("成功");
}else {
System.out.println("失败");
}
}
@Test
public void delete(){
int i = userDao.delete(1);
if(i>0){
System.out.println("删除成功");
}else {
System.out.println("删除失败");
}
}
@Test
public void selectByuid(){
User user = userDao.selectByuid(2);
System.out.println(user);
}
@Test
public void update(){
//1.数据库回显
User oldUser = userDao.selectByuid(2);
System.out.println("修改前："+oldUser);
//2.根据需要修改字段值
oldUser.setUsername("修改测试");
oldUser.setAddress("河南郑州");
//3.执行数据库更新
userDao.update(oldUser);
//4.再次查询
User newUser = userDao.selectByuid(2);
System.out.println("修改后："+newUser);
}
@After
public void drstroy() throws IOException {
sqlSession.commit();
sqlSession.close();
stream.close();
}
}
以下代码是打印日志信息所需代码
日志信息代码
新加两个properties文件
jdbc.properties
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/mydb
jdbc.user=root
jdbc.password=root
mapper.dao=com.dao.EmpDaolog4j.properties
log4j.rootLogger=TRACE,stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
#log4j.appender.stdout.Target=System.err
log4j.appender.stdout.layout=org.apache.log4j.SimpleLayout
log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.File=wocao.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %F %p %m%n
log4j.logger.mapperNS =TRACE
log4j.logger.com.mybatis=DEBUG
log4j.logger.com.mybatis.common.jdbc.SimpleDataSource=DEBUG
log4j.logger.com.mybatis.common.jdbc.ScriptRunner=DEBUG
log4j.logger.com.mybatis.sqlmap.engine.impl.SqlMapClientDelegate=DEBUG
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG
log4j.logger.java.sql.ResultSet=DEBUG
log4j.logger.org.springframework=error
log4j.logger.org.apache=ERROR
log4j.logger.org.mybatis=DEBUG mybatis.xml更新代码