first

README.md

@@ -24,26 +24,80 @@
 #### select(UserEntity::getId)  查询指定的字段,支持可变参数
 
 查询user表中的head_img,name和user_address表中的address,tel
-![image](https://gitee.com/best_handsome/mybatis-plus-join/raw/master/doc/select.png)
+
-对应sql  
+```java
-  
+class test {
-![image](https://gitee.com/best_handsome/mybatis-plus-join/raw/master/doc/selectSql.png)
+    void testJoin() {
+        List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
+                        .select(UserEntity::getHeadImg, UserEntity::getHeadImg)
+                        .leftJoin(UserEntity::getId, UserAddressEntity::getUserId,
+                                right -> right.select(UserAddressEntity::getAddress, UserAddressEntity::getTel))
+                , UserDTO.class);
+    }
+}
+```
+
+对应sql
+
+```sql
+SELECT t0.head_img, t0.head_img, t1.address, t1.tel
+FROM user t0
+         LEFT JOIN user_address t1 ON t0.id = t1.user_id
+```
 
 #### selectAll(UserEntity.class) 查询UserEntity全部字段
 
 查询user全部字段和user_address表中的address,tel
-![image](https://gitee.com/best_handsome/mybatis-plus-join/raw/master/doc/selectAll.png)
+
-对应sql  
+```java
-  
+class test {
-![image](https://gitee.com/best_handsome/mybatis-plus-join/raw/master/doc/selectAllSql.png)
+    @Resource
+    private UserMapper userMapper;
+
+    void testJoin() {
+        List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
+                        .selectAll(UserEntity.class)
+                        .leftJoin(UserEntity::getId, UserAddressEntity::getUserId,
+                                right -> right.select(UserAddressEntity::getAddress, UserAddressEntity::getTel))
+                , UserDTO.class);
+    }
+}
+```
+
+对应sql
+
+```sql
+SELECT t0.name, t0.sex, t0.head_img, t0.id, t1.address, t1.tel
+FROM user t0
+         LEFT JOIN user_address t1 ON t0.id = t1.user_id
+```
 
 #### as(UserEntity::getHeadImg,UserDTO::getUserHeadImg)
 
 查询字段head_img as userHeadImg
-![image](https://gitee.com/best_handsome/mybatis-plus-join/raw/master/doc/selectAs.png)
+
-对应sql  
+```java
-  
+class test {
-![image](https://gitee.com/best_handsome/mybatis-plus-join/raw/master/doc/selectAsSql.png)
+    @Resource
+    private UserMapper userMapper;
+
+    void testJoin() {
+        List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
+                        .as(UserEntity::getHeadImg, UserDTO::getUserHeadImg)
+                        .leftJoin(UserEntity::getId, UserAddressEntity::getUserId,
+                                right -> right.select(UserAddressEntity::getAddress, UserAddressEntity::getTel))
+                , UserDTO.class);
+    }
+}
+```
+
+对应sql
+
+```sql
+SELECT t0.head_img AS userHeadImg, t1.address, t1.tel
+FROM user t0
+         LEFT JOIN user_address t1 ON t0.id = t1.user_id
+```
 
 #### 左连接 leftJoin(UserEntity::getId,UserAddressEntity::getUserId,right -> right)
 
@@ -53,10 +107,32 @@ user left join user_address on user.id = User_address.user_id
 
 #### 条件查询eq()
 
-![image](https://gitee.com/best_handsome/mybatis-plus-join/raw/master/doc/selectEq.png)
+```java
-对应sql  
+class test {
-  
+    @Resource
-![image](https://gitee.com/best_handsome/mybatis-plus-join/raw/master/doc/selectEqSql.png)
+    private UserMapper userMapper;
+
+    void testJoin() {
+        List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
+                        .selectAll(UserEntity.class)
+                        .leftJoin(UserEntity::getId, UserAddressEntity::getUserId,
+                                right -> right.select(UserAddressEntity::getAddress, UserAddressEntity::getTel))
+                        .eq(true, UserEntity::getId, 1)
+                        .like(UserAddressEntity::getTel, "1")
+                        .eq(UserEntity::getId, UserAddressEntity::getUserId)
+                , UserDTO.class);
+    }
+}
+```
+
+对应sql
+
+```sql
+SELECT t0.name, t0.sex, t0.head_img, t0.id, t1.address, t1.tel
+FROM user t0
+         LEFT JOIN user_address t1 ON t0.id = t1.user_id
+WHERE (t0.id = ? AND t1.tel LIKE ? AND t0.id = t1.user_id)
+```
 
 #### [参考测试类](https://gitee.com/best_handsome/mybatis-plus-join/blob/master/src/test/java/com/example/mp/MpJoinTest.java)
 

src/test/java/com/example/mp/MpJoinTest.java

@@ -113,14 +113,44 @@ class MpJoinTest {
 
 
     @Test
-    void test4() {
+    void select() {
-        userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
+        List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
+                        .select(UserEntity::getHeadImg, UserEntity::getHeadImg)
+                        .leftJoin(UserEntity::getId, UserAddressEntity::getUserId,
+                                right -> right.select(UserAddressEntity::getAddress, UserAddressEntity::getTel))
+                , UserDTO.class);
+    }
+
+    @Test
+    void selectAll() {
+        List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
+                        .selectAll(UserEntity.class)
+                        .leftJoin(UserEntity::getId, UserAddressEntity::getUserId,
+                                right -> right.select(UserAddressEntity::getAddress, UserAddressEntity::getTel))
+                , UserDTO.class);
+    }
+
+    @Test
+    void selectAs() {
+        List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
                         .as(UserEntity::getHeadImg, UserDTO::getUserHeadImg)
                         .leftJoin(UserEntity::getId, UserAddressEntity::getUserId,
                                 right -> right.select(UserAddressEntity::getAddress, UserAddressEntity::getTel))
                 , UserDTO.class);
     }
 
+    @Test
+    void selectEq() {
+        List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
+                        .selectAll(UserEntity.class)
+                        .leftJoin(UserEntity::getId, UserAddressEntity::getUserId,
+                                right -> right.select(UserAddressEntity::getAddress, UserAddressEntity::getTel))
+                        .eq(true, UserEntity::getId, 1)
+                        .like(UserAddressEntity::getTel, "1")
+                        .eq(UserEntity::getId, UserAddressEntity::getUserId)
+                , UserDTO.class);
+    }
+
 
     private void log(String format, String... args) {
         System.err.println(String.format(format, args));