MyBatis注解开发

简单CRUD

package com.ttpfx.dao;

import com.ttpfx.domain.User;
import org.apache.ibatis.annotations.*;

import java.util.List;

public interface UserDao {
    @Select("select id, username, birthday, sex, address from user")
    List<User> getUserList();

    @Select("select id, username, birthday, sex, address from user where username like #{keyword}")
    List<User> getUserListByName(String keyword);

    @Select("select id, username, birthday, sex, address from user where id = #{id}")
    User getUserById(Integer id);

    @Insert("insert into user (username, birthday, sex, address) values (#{username}, #{birthday}, #{sex}, #{address})")
    int addUser(User user);

    @Update("update user set username=#{username}, birthday=#{birthday}, sex=#{sex}, address=#{address} where id=#{id}")
    int updateUser(User user);

    @Delete("delete from user where id=#{id}")
    int deleteUser(Integer id);
}

关联查询之一对一

package com.ttpfx.dao;

import com.ttpfx.domain.Account;
import com.ttpfx.domain.User;
import org.apache.ibatis.annotations.*;
import org.apache.ibatis.mapping.FetchType;

import java.util.List;

public interface AccountDao {
    @Select("select id, uid, money from account")
    @Results(id = "accountUserMap", value = {
            @Result(id = true, column = "id", property = "id"),
            @Result(column = "uid", property = "uid"),
            @Result(column = "money", property = "money"),
            @Result(column = "uid", property = "user", javaType = User.class, one = @One(select = "com.ttpfx.dao.UserDao.getUserById", fetchType = FetchType.EAGER))
    })
    List<Account> getAccountList();

    @Select("select id, uid, money from account where id=#{id}")
    @ResultMap({"accountUserMap"})
    Account getAccountById(Integer id);
}

关联查询之一对多

package com.ttpfx.dao;

import com.ttpfx.domain.User;
import org.apache.ibatis.annotations.*;
import org.apache.ibatis.mapping.FetchType;

import java.util.List;

public interface UserDao {
    @Select("select id, username, birthday, sex, address from user")
    @Results(id = "userAccountMap", value = {
            @Result(id = true, column = "id", property = "id"),
            @Result(column = "username", property = "username"),
            @Result(column = "birthday", property = "birthday"),
            @Result(column = "sex", property = "sex"),
            @Result(column = "address", property = "address"),
            @Result(column = "id", property = "accounts", many = @Many(select = "com.ttpfx.dao.AccountDao.getAccountListByUid", fetchType = FetchType.LAZY))
    })
    List<User> getUserList();
}