diff --git a/src/main/java/com/snhanyue/course/controller/api/UsersController.java b/src/main/java/com/snhanyue/course/controller/api/UsersController.java
index 643ba5766ef3aefdcf87c471f7ed610d5568a088..57b9c11ed260482df7030a4c14f595f3ae17caba 100644
--- a/src/main/java/com/snhanyue/course/controller/api/UsersController.java
+++ b/src/main/java/com/snhanyue/course/controller/api/UsersController.java
@@ -4,6 +4,7 @@ import com.snhanyue.course.dto.UsersAddNewUserDTO;
 import com.snhanyue.course.service.api.IUsersService;
 import com.snhanyue.course.util.json.JsonResult;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -15,12 +16,18 @@ public class UsersController {
     @Autowired
     private IUsersService usersService;
 
+    //注册用户
     @PostMapping("/users/add-new")
     public JsonResult addNew(UsersAddNewUserDTO usersAddNewUserDTO){
      usersService.addNewUser(usersAddNewUserDTO);
      return JsonResult.ok();
+     //http://localhost:8080/api/users/add-new?username=chenpeng
+    }
 
-     //http://localhost:8080/users/add-new?username=chenpeng
-
+    //登录用户
+    @PostMapping("/users/login")
+    public JsonResult login(UsersAddNewUserDTO usersAddNewUserDTO){
+        usersService.loginUser(usersAddNewUserDTO);
+        return JsonResult.ok();
     }
 }
diff --git a/src/main/java/com/snhanyue/course/emum/State.java b/src/main/java/com/snhanyue/course/emum/State.java
index 6a84032f49e522fd6c7f6ab281a77ec9d64e98d3..d9d2377e9f8a6b420de4c4ba95925d6a3fa508ef 100644
--- a/src/main/java/com/snhanyue/course/emum/State.java
+++ b/src/main/java/com/snhanyue/course/emum/State.java
@@ -6,7 +6,9 @@ public enum State {
     ERR_CATEGORY_NOT_FOUND(40101), // 客户端引起的--类别--数据不存在（查询参数值不正确）
     ERR_INSERT(50000), // 服务端引起的--插入数据错误
     ERR_UPDATE(50001), // 服务端引起的--更新数据错误
-    ERR_REPEAT_OF_USER_NAME(50002);//用户名冲突
+    ERR_REPEAT_OF_USER_NAME(50002),//用户名冲突
+    ERR_USER_NAME_DOES_NOT_EXIST(50003),//用户名不存在
+    ERR_PASSWORD(50004);//密码错误
 
     private Integer value;
 
diff --git a/src/main/java/com/snhanyue/course/mapper/database/UsersMapper.java b/src/main/java/com/snhanyue/course/mapper/database/UsersMapper.java
index 5997afa0a816c4947ff56b5a189f393ec748526b..7ffbec2b01cc5b576570a4f3d4f575600b5298c6 100644
--- a/src/main/java/com/snhanyue/course/mapper/database/UsersMapper.java
+++ b/src/main/java/com/snhanyue/course/mapper/database/UsersMapper.java
@@ -1,7 +1,7 @@
 package com.snhanyue.course.mapper.database;
 
 import com.snhanyue.course.entity.Users;
-import com.snhanyue.course.vo.UsersVo;
+import com.snhanyue.course.vo.UsersVO;
 import org.apache.ibatis.annotations.Param;
 import org.springframework.stereotype.Repository;
 
@@ -24,7 +24,7 @@ public interface UsersMapper {
      * @param username用户名
      * @return 查询的数据
      */
-    UsersVo getByName(String username);
+    UsersVO getByName(String username);
 
     /**
      *
diff --git a/src/main/java/com/snhanyue/course/service/api/IUsersService.java b/src/main/java/com/snhanyue/course/service/api/IUsersService.java
index 46942120400eb3d28f8625edd99597b3f5e861a2..29ba0cd5f96567997d927b9d1fa410e18c8a2388 100644
--- a/src/main/java/com/snhanyue/course/service/api/IUsersService.java
+++ b/src/main/java/com/snhanyue/course/service/api/IUsersService.java
@@ -4,4 +4,6 @@ import com.snhanyue.course.dto.UsersAddNewUserDTO;
 
 public interface IUsersService {
     void addNewUser(UsersAddNewUserDTO usersAddNewUserDTO);
+
+    void loginUser(UsersAddNewUserDTO usersAddNewUserDTO);
 }
diff --git a/src/main/java/com/snhanyue/course/service/api/impl/UsersServiceImpl.java b/src/main/java/com/snhanyue/course/service/api/impl/UsersServiceImpl.java
index 89e3c746436796c3c709ca94743781e8248d1b48..ba44b1a4a38709ac6626372630c2ae9a114aca14 100644
--- a/src/main/java/com/snhanyue/course/service/api/impl/UsersServiceImpl.java
+++ b/src/main/java/com/snhanyue/course/service/api/impl/UsersServiceImpl.java
@@ -6,7 +6,8 @@ import com.snhanyue.course.entity.Users;
 import com.snhanyue.course.exception.ServiceException;
 import com.snhanyue.course.mapper.database.UsersMapper;
 import com.snhanyue.course.service.api.IUsersService;
-import com.snhanyue.course.vo.UsersVo;
+import com.snhanyue.course.util.json.JsonResult;
+import com.snhanyue.course.vo.UsersVO;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -19,28 +20,62 @@ public class UsersServiceImpl implements IUsersService {
 
     @Override
     public void addNewUser(UsersAddNewUserDTO usersAddNewUserDTO) {
+
         //从参数中获取用户名
         String name = usersAddNewUserDTO.getUsername();
         //调用查询方法查询数据库
-        UsersVo byName = usersMapper.getByName(name);
+        UsersVO usersVO = usersMapper.getByName(name);
+//        String sqlName = usersVO.getUsername();
         //判断数据库是否有该用户名
-        if (byName != null) {
+        if ( usersVO.equals(null) ) {
             System.out.println("用户添加失败用户名" + name + "已存在");
-
+            throw new ServiceException(State.ERR_REPEAT_OF_USER_NAME,"用户名已存在");
         }
         Users users = new Users();
         //将DTO类中的数据全部复制到entity中的users里面
         BeanUtils.copyProperties(usersAddNewUserDTO, users);
         //补全状态
         users.setIs_enable(1);
+
+        //密码需要加密,功能后补
+
+
+
         //调用接口插入数据获取返回值
         int row = usersMapper.insert(users);
         //根据返回值判断是否插入成功
         if (row != 1) {
-            System.out.println("数据库信息插入失败，请稍后再试");
+//            System.out.println("数据库信息插入失败，请稍后再试");
+            throw new ServiceException(State.ERR_INSERT,"数据库信息插入失败");
+        }
 
+
+    }
+
+    @Override
+    public void loginUser(UsersAddNewUserDTO usersAddNewUserDTO) {
+        //从参数中获取用户名
+        String name = usersAddNewUserDTO.getUsername();
+        //调用查询方法查询数据库
+        UsersVO usersVO = usersMapper.getByName(name);
+        String sqlName=usersVO.getUsername();
+        //判断数据库是否有该用户名
+        if (sqlName == null) {
+            System.out.println("用户登录失败用户名" + name + "不存在");
+            throw new ServiceException(State.ERR_USER_NAME_DOES_NOT_EXIST,"用户名不存在登陆失败");
         }
+        String password = usersAddNewUserDTO.getPassword();
+        String sqlPassword=usersVO.getPassword();
+        if (password.equals(sqlPassword) && name.equals(sqlName)) {
+            System.out.println("登陆成功");
+            return;
+        }else {
+            System.out.println(password+"password");
+            System.out.println(sqlPassword+"passwords");
+            throw new ServiceException(State.ERR_PASSWORD,"密码错误");
 
+        }
 
     }
+
 }
diff --git a/src/main/java/com/snhanyue/course/vo/UsersVo.java b/src/main/java/com/snhanyue/course/vo/UsersVO.java
similarity index 93%
rename from src/main/java/com/snhanyue/course/vo/UsersVo.java
rename to src/main/java/com/snhanyue/course/vo/UsersVO.java
index 177b51a9c0d369473e1f0127acf3b46c34d7e825..021c3730a0f61aa88b9c71cf9d0423e17c89ffad 100644
--- a/src/main/java/com/snhanyue/course/vo/UsersVo.java
+++ b/src/main/java/com/snhanyue/course/vo/UsersVO.java
@@ -3,7 +3,7 @@ package com.snhanyue.course.vo;
 import lombok.Data;
 @Data
 
-public class UsersVo {
+public class UsersVO {
     private String username;
     private String password;
     private int gender;
diff --git a/src/main/resources/mybatis/mapper/UsersMapper.xml b/src/main/resources/mybatis/mapper/UsersMapper.xml
index 63f4a6d914bb5d04867a82cf9d8e2111d9369523..25ed957fddcb3ed57154b92a44fd28f58bbf0bf6 100644
--- a/src/main/resources/mybatis/mapper/UsersMapper.xml
+++ b/src/main/resources/mybatis/mapper/UsersMapper.xml
@@ -28,7 +28,7 @@
     <select id="getByName" resultMap="SimpleResultMap">
     select * from users where username=#{name}
     </select>
-    <resultMap id="SimpleResultMap" type="com.snhanyue.course.vo.UsersVo">
+    <resultMap id="SimpleResultMap" type="com.snhanyue.course.vo.UsersVO">
         <id column="id" property="id" />
         <id column="password" property="password" />
         <id column="gender" property="gender" />
diff --git a/src/test/java/com/snhanyue/mapper/UserMapperTests.java b/src/test/java/com/snhanyue/mapper/UserMapperTests.java
index 3519eb0c7fd9d4a43db95c5ab32c5a69052d430e..8b1e5201337f050ca963cd7617b9086186018dbd 100644
--- a/src/test/java/com/snhanyue/mapper/UserMapperTests.java
+++ b/src/test/java/com/snhanyue/mapper/UserMapperTests.java
@@ -3,7 +3,7 @@ package com.snhanyue.mapper;
 
 import com.snhanyue.course.entity.Users;
 import com.snhanyue.course.mapper.database.UsersMapper;
-import com.snhanyue.course.vo.UsersVo;
+import com.snhanyue.course.vo.UsersVO;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
@@ -40,7 +40,7 @@ public class UserMapperTests {
     @Test
     public void testGetByName(){
         String name="陈鹏";
-        UsersVo usersVo = mapper.getByName(name);
+        UsersVO usersVo = mapper.getByName(name);
         System.out.println(usersVo.toString());
     }