add login

pom.xml

@@ -50,6 +50,11 @@
             <artifactId>orika-core</artifactId>
             <version>1.5.4</version>
         </dependency>
+        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

src/main/java/com/sport/sportsmailserver/controller/UserController.java

@@ -0,0 +1,38 @@
+package com.sport.sportsmailserver.controller;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.sport.sportsmailserver.dto.RestModel;
+import com.sport.sportsmailserver.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author itning
+ * @date 2020/2/12 11:39
+ */
+@RestController
+public class UserController {
+    private final UserService userService;
+
+    @Autowired
+    public UserController(UserService userService) {
+        this.userService = userService;
+    }
+
+    /**
+     * 用户登录
+     *
+     * @param username 用户名
+     * @param password 密码
+     * @return ResponseEntity
+     * @throws JsonProcessingException See {@link UserService#login(String, String)}
+     */
+    @PostMapping("/login")
+    public ResponseEntity<?> login(@RequestParam String username,
+                                   @RequestParam String password) throws JsonProcessingException {
+        return RestModel.ok(userService.login(username, password));
+    }
+}

src/main/java/com/sport/sportsmailserver/exception/ErrorHandler.java

@@ -0,0 +1,42 @@
+package com.sport.sportsmailserver.exception;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.web.servlet.error.ErrorAttributes;
+import org.springframework.boot.web.servlet.error.ErrorController;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.context.request.ServletWebRequest;
+import org.springframework.web.context.request.WebRequest;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.Map;
+
+/**
+ * 错误处理器
+ *
+ * @author itning
+ */
+@RestController
+public class ErrorHandler implements ErrorController {
+    private final ErrorAttributes errorAttributes;
+
+    @Autowired
+    public ErrorHandler(ErrorAttributes errorAttributes) {
+        this.errorAttributes = errorAttributes;
+    }
+
+    @Override
+    public String getErrorPath() {
+        return "/error";
+    }
+
+    @RequestMapping(value = "/error", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
+    public String error(HttpServletRequest request) {
+        WebRequest webRequest = new ServletWebRequest(request);
+        Map<String, Object> errorAttributes = this.errorAttributes.getErrorAttributes(webRequest, true);
+        String msg = errorAttributes.getOrDefault("error", "not found").toString();
+        String code = errorAttributes.getOrDefault("status", 404).toString();
+        return "{\"code\":" + code + ",\"msg\":\"" + msg + "\",\"data\":\"\"}";
+    }
+}

src/main/java/com/sport/sportsmailserver/exception/IdNotFoundException.java

@@ -0,0 +1,15 @@
+package com.sport.sportsmailserver.exception;
+
+import org.springframework.http.HttpStatus;
+
+/**
+ * 主键不存在
+ *
+ * @author itning
+ * @date 2020/2/12 11:34
+ */
+public class IdNotFoundException extends BaseException {
+    public IdNotFoundException(String msg) {
+        super(msg, HttpStatus.NOT_FOUND);
+    }
+}

src/main/java/com/sport/sportsmailserver/exception/NullFiledException.java

@@ -0,0 +1,15 @@
+package com.sport.sportsmailserver.exception;
+
+import org.springframework.http.HttpStatus;
+
+/**
+ * 传入的参数为空
+ *
+ * @author itning
+ * @date 2020/2/12 11:34
+ */
+public class NullFiledException extends BaseException {
+    public NullFiledException(String msg) {
+        super(msg, HttpStatus.BAD_REQUEST);
+    }
+}

src/main/java/com/sport/sportsmailserver/service/UserService.java

@@ -0,0 +1,21 @@
+package com.sport.sportsmailserver.service;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+
+/**
+ * 用户服务
+ *
+ * @author itning
+ * @date 2020/2/12 11:29
+ */
+public interface UserService {
+    /**
+     * 用户登录
+     *
+     * @param username 用户名
+     * @param password 密码
+     * @return jwt token
+     * @throws JsonProcessingException JWT构建失败
+     */
+    String login(String username, String password) throws JsonProcessingException;
+}

src/main/java/com/sport/sportsmailserver/service/impl/UserServiceImpl.java

@@ -0,0 +1,59 @@
+package com.sport.sportsmailserver.service.impl;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.sport.sportsmailserver.dto.LoginUser;
+import com.sport.sportsmailserver.entity.Role;
+import com.sport.sportsmailserver.entity.User;
+import com.sport.sportsmailserver.exception.IdNotFoundException;
+import com.sport.sportsmailserver.exception.NullFiledException;
+import com.sport.sportsmailserver.exception.SecurityServerException;
+import com.sport.sportsmailserver.repository.RoleRepository;
+import com.sport.sportsmailserver.repository.UserRepository;
+import com.sport.sportsmailserver.service.UserService;
+import com.sport.sportsmailserver.util.JwtUtils;
+import com.sport.sportsmailserver.util.OrikaUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+/**
+ * @author itning
+ * @date 2020/2/12 11:31
+ */
+@Service
+@Transactional(rollbackFor = Exception.class)
+public class UserServiceImpl implements UserService {
+    private final UserRepository userRepository;
+
+    @Autowired
+    public UserServiceImpl(UserRepository userRepository, RoleRepository roleRepository) {
+        this.userRepository = userRepository;
+        if (!roleRepository.existsById(Role.ROLE_ADMIN_ID)) {
+            Role role = new Role();
+            role.setId(Role.ROLE_ADMIN_ID);
+            role.setName("管理员");
+            roleRepository.save(role);
+        }
+        if (!roleRepository.existsById(Role.ROLE_USER_ID)) {
+            Role role = new Role();
+            role.setId(Role.ROLE_USER_ID);
+            role.setName("用户");
+            roleRepository.save(role);
+        }
+    }
+
+    @Override
+    public String login(String username, String password) throws JsonProcessingException {
+        if (StringUtils.isAnyBlank(username, password)) {
+            throw new NullFiledException("用户名/密码不能为空");
+        }
+        User user = userRepository.findById(username).orElseThrow(() -> new IdNotFoundException("用户名不存在"));
+        if (!password.equals(user.getPassword())) {
+            throw new SecurityServerException("密码错误", HttpStatus.BAD_REQUEST);
+        }
+        LoginUser loginUser = OrikaUtils.a2b(user, LoginUser.class);
+        return JwtUtils.buildJwt(loginUser);
+    }
+}