Python 官方文档:入门教程 => 点击学习
如何实现?主要分为以下两步骤 1.通过 Mapper 代理实现⾃定义接口 2.编写与方法相对应的 Mapper.xml 1.自定义接口Account
如何实现?主要分为以下两步骤
package repository;
import entity.Account;
import java.util.List;
public interface AccountRepository {
public int save(Account account);
public int update(Account account);
public int deleteById(long id);
public List<Account> findAll();
public Account findById(long id);
}
statement 标签可根据 SQL 执⾏的业务选择 insert、delete、update、select。 mybatis 框架会根据规则⾃动创建接⼝实现类的代理对象
规则:
<?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">
<mapper namespace="repository.AccountRepository">
<insert id="save" parameterType="entity.Account">
insert into t_account(username,passWord,age) values (#{username},#{password},#{age});
</insert>
<update id="update" parameterType="entity.Account">
update t_account set username=#{username},password=#{password},age=#{age} where id=#{id};
</update>
<delete id="deleteById" parameterType="long">
delete from t_account where id=#{id};
</delete>
<select id="findAll" resultType="entity.Account">
select * from t_account;
</select>
<select id="findById" parameterType="long" resultType="entity.Account">
select * from t_account where id =#{id};
</select>
</mapper>
<mappers>
<mapper resource="mapper/AccountMapper.xml"></mapper>
<mapper resource="repository/AccountRepository.xml"></mapper>
</mappers>
package Test;
import entity.Account;
import org.apache.ibatis.io.ResolverUtil;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import repository.AccountRepository;
import java.io.InputStream;
import java.util.List;
public class Test1 {
public static void main(String[] args) {
InputStream inputStream= ResolverUtil.Test.class.getClassLoader().getResourceAsStream("config.xml");
SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(inputStream);
SqlSession sqlSession = sqlSessionFactory.openSession();
AccountRepository accountRepository=sqlSession.getMapper(AccountRepository.class);
// List<Account> list=accountRepository.findAll();
// for(Account account:list){
// System.out.println(account);
// }
// sqlSession.close();
//添加
// Account account=new Account(3L,"wangwu","555555",122);
// accountRepository.save(account);
// sqlSession.commit();
//通过id查找对象
// Account account=accountRepository.findById(3L);
// System.out.println(account);
// sqlSession.close();
//通过id改对象
// Account account=accountRepository.findById(2L);
// account.setUsername("alibaba");
// account.setPassword("12345678");
// account.setAge(11);
// int result=accountRepository.update(account);
// sqlSession.commit();
// System.out.println(result);
// sqlSession.close();
//删除
int result=accountRepository.deleteById(3L);
sqlSession.commit();
System.out.println(result);
sqlSession.close();
}
}
以上就是java应用开发之Mybatis通过Mapper代理自定义接口的实现的详细内容,更多关于Mybatis通过Mapper代理自定义接口的资料请关注编程网其它相关文章!
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