3.1 项目程序介绍：
3.2 User.java
packagecom.ask.pojo;
importjava.io.Serializable;
importjava.util.Date;
importjava.util.List;
public classUser implements Serializable {
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
private List<Integer> ids;
public List<Integer> getIds() {
return ids;
}
public void setIds(List<Integer>ids) {
this.ids = ids;
}
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;
}
public User(String username, String sex,Date birthday, String address) {
super();
this.username = username;
this.sex = sex;
this.birthday = birthday;
this.address = address;
}
public User() {
super();
// TODO Auto-generated constructor stub
}
@Override
public String toString() {
return "User [id=" + id +", username=" + username + ", sex=" + sex
+ ", birthday=" +birthday + ", address=" + address + "]";
}
}
3.3 UserMapper.java
packagecom.ask.mapper;
importjava.util.List;
importcom.ask.pojo.User;
public interfaceUserMapper {
public List<User> getUsers(Useruser)throws Exception;
}
3.4 UserMapper.xml配置文件如下:
<?xml version="1.0"encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTDMapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ask.mapper.UserMapper">
<sql id="query_user">
<if test="id!=null andid!=''">
and id=#{id}
</if>
<!-- 模糊查询 -->
<if test="username!=nulland username!=''">
andusername like '%${username}%'
</if>
</sql>
<select id="getUsers"parameterType="user" resultType="user">
select * from user
<where>
<include refid="query_user"></include>
</where>
</select>
</mapper>
3.4 UserTest.java
package com.ask.test;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
importorg.apache.ibatis.io.Resources;
importorg.apache.ibatis.session.SqlSession;
importorg.apache.ibatis.session.SqlSessionFactory;
importorg.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;
import com.ask.mapper.UserMapper;
import com.ask.pojo.User;
public class UserTest {
//SqlSessionFactory的自动加载;
privateSqlSessionFactory sessionFactory;
@Before
public void up() throws IOException{
InputStreamis=Resources.getResourceAsStream("SQLMapConfig.xml");
sessionFactory=newSqlSessionFactoryBuilder().build(is);
}
@Test
publicvoid testGetUsers() throws Exception {
SqlSessionsession=sessionFactory.openSession();
UserMapperuserMapper=session.getMapper(UserMapper.class);
Useruser=new User();
user.setId(1);
user.setUsername("王");
List<User>users=userMapper.getUsers(user);
System.out.println(users.get(0));
}
}
3.5 db.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost/mydb?useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=root
3.6 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
3.7 SQLMAPConfig.xml
<?xml version="1.0"encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTDConfig 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<properties resource="db.properties"></properties>
<typeAliases>
<package name="com.ask.pojo"/>
</typeAliases>
<!-- 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="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<mappers>
<package name="com.ask.mapper"/>
</mappers>
</configuration>
3.8 程序运行如下：
