当MyBatis的xml文件中sql语句查询多个对象时该怎么写

今天学习MyBatis时写sql遇到了问题，所以就写了，咋们废话不多说直接上代码：

首先使数据库方面sql代码：

use mybatis;
create table t_account(
	id int primary key auto_increment,
	username VARCHAR(11),
	password VARCHAR(11),
	age int 
)

运行结果

我这边添加数据后：

 

定义字段的Account：

package com.fzf.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Account {
    private long  id;
    private String username;
    private String password;
    private int age;
}

AccountRepository接口类

package com.fzf.repository;

import com.fzf.entity.Account;

import java.util.List;

public interface AccountRepository {
    public Account findByNameAndAge(String name,int age);
}

测试的Test2

package com.fzf.test;

import com.fzf.entity.Account;
import com.fzf.repository.AccountRepository;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.InputStream;
import java.util.List;

public class Test2 {
    public static void main(String[] args) {
        InputStream inputStream=Test.class.getClassLoader().getResourceAsStream("config.xml");
        SqlSessionFactoryBuilder sqlSessionFactoryBuilder=new SqlSessionFactoryBuilder();
        SqlSessionFactory sqlSessionFactory=sqlSessionFactoryBuilder.build(inputStream);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //获取实现接口的代理对象
        AccountRepository accountRepository=sqlSession.getMapper(AccountRepository.class);

        System.out.println(accountRepository.findByNameAndAge("张三",22));
        sqlSession.close();

    }
}

AccountRepository.xml

    
        select * from t_account where username = #{param0}and age = #{param1}
    

书写方法就是AccountRepository.xml中select写法，#{}里面写param1，param2或者写arg0，arg1，不然就会报错：

最后我们查询成功，nice！