Spring Boot - 构建RESTful API与单元测试

原文

@Controller 标记该 class为处理http请求的对象

@RestController Spring4后加入的注解,原来@Controller中返回 json需要返回@ResponseBody。使用@RestController不需要配置,自动默认返回 json。

RESTful api设计：

请求类型	URL	功能说明
GET	/users	查询用户列表
POST	/users	创建一个用户
GET	/users/id	根据 id查询用户
PUT	/users/id	根据 id更新用户
DELETE	/users/id	根据 id删除用户

@RestController
@RequestMapping("/users")
public class UserController {

//创建线程安全的 map
static Map<Long, User> users = Collections.synchronizedMap(new HashMap<Long, User>());

@RequestMapping(value = "/", method = RequestMethod.GET)
public List<User> getUserList() {
ArrayList<User> users = new ArrayList<User>(UserController.users.values());
return users;
}

@RequestMapping(value = "/", method = RequestMethod.POST)
public String postUser(@ModelAttribute User user) {
users.put(user.getId(), user);
return "success";
}

@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public User getUser(@PathVariable Long id) {
return users.get(id);
}

@RequestMapping(value = "/{id}", method = RequestMethod.PUT)
public String putUser(@PathVariable Long id, @ModelAttribute User user) {
User u = users.get(id);
u.setName(user.getName());
u.setAge(user.getAge());
users.put(id, u);
return "success";
}

@RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
public String deleteUser(@PathVariable Long id) {
users.remove(id);
return "success";
}
}