Mybatis多参数封装到一个类中模糊查询

1.创建QueryValueObject实体类

package com.william.domain;import org.omg.PortableInterceptor.USER_EXCEPTION;/*** @author ：lijunxuan* @date ：Created in 2019/7/12  12:09* @description ：* @version: 1.0*/
public class QueryValueObject {private User user;private Integer  startIndex;private Integer  pageSize;public User getUser() {return user;}public void setUser(User user) {this.user = user;}public Integer getStartIndex() {return startIndex;}public void setStartIndex(Integer startIndex) {this.startIndex = startIndex;}public Integer getPageSize() {return pageSize;}public void setPageSize(Integer pageSize) {this.pageSize = pageSize;}
}

2.UserMapper接口

package com.william.dao;import com.william.domain.QueryValueObject;
import com.william.domain.User;import java.util.List;public interface UserMapper {/*** 封装到一个类中查询* @param queryValueObject* @return*/public List<User> findByCondition(QueryValueObject queryValueObject);}

3.UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.william.dao.UserMapper"><!--多参数封装到一个类中多条件查询--><select id="findByCondition" parameterType="QueryValueObject" resultType="user">select * from user where username like "%"#{user.username}"%" and sex=#{user.sex}limit #{startIndex},#{pageSize}</select>
</mapper>

4.TestCrud测试类

package com.william;import com.william.dao.UserMapper;
import com.william.domain.QueryValueObject;
import com.william.domain.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 javax.annotation.Resource;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;/*** @author ：lijunxuan* @date ：Created in 2019/7/12  10:16* @description ：* @version: 1.0*/
public class TestCrud {/*** 多参数封装到一个类中，多条件查询* @throws IOException*/@Testpublic void findByCondition() throws IOException {InputStream inputStream = Resources.getResourceAsStream("Mybatis-configuration.xml");SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);SqlSession sqlSession = sqlSessionFactory.openSession();//获取某接口的动态代理对象（获取某接口的一个实现类）UserMapper userMapper = sqlSession.getMapper(UserMapper.class);QueryValueObject queryValueObject = new QueryValueObject();User user = new User();user.setUsername("a");user.setSex("男");queryValueObject.setPageSize(5);queryValueObject.setStartIndex(0);queryValueObject.setUser(user);List<User> userMapperByCondition = userMapper.findByCondition(queryValueObject);for (User user1 : userMapperByCondition) {System.out.println(user1);}sqlSession.close();}
}