Question

我是Spring Boot的新手我正在学习本教程 https://github.com/netgloo/spring-boot-samples/tree/master/spring-boot-mysql-springdatajpa-hibernate

我所做的就是下载这个jar并构建它并在localhost：8080

上运行它

我的Application.java是主文件，如下所示：

package netgloo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

  public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
  }

}

我的主控制器如下：

package netgloo.controllers;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class MainController {

  @RequestMapping("/")
  @ResponseBody
  public String index() {
    return "Proudly handcrafted by " + 
        "<a href='http://netgloo.com/en'>netgloo</a> :)";
  }

}

我的用户控制器如下：

package netgloo.controllers;

import netgloo.models.User;
import netgloo.models.UserDao;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping(value="/user")
public class UserController {

  @Autowired
  private UserDao _userDao;

  @RequestMapping(value="/delete")
  @ResponseBody
  public String delete(long id) {
    try {
      User user = new User(id);
      _userDao.delete(user);
    }
    catch(Exception ex) {
      return ex.getMessage();
    }
    return "User succesfully deleted!";
  }

  @RequestMapping(value="/get-by-email")
  @ResponseBody
  public String getByEmail(String email) {
    String userId;
    try {
      User user = _userDao.getByEmail(email);
      userId = String.valueOf(user.getId());
    }
    catch(Exception ex) {
      return "User not found";
    }
    return "The user id is: " + userId;
  }

  @RequestMapping(value="/save")
  @ResponseBody
  public String create(String email, String name) {
    try {
      User user = new User(email, name);
      _userDao.save(user);
    }
    catch(Exception ex) {
      return ex.getMessage();
    }
    return "User succesfully saved!";
  }

} // class UserController

当我输入localhost：8080时，我看到主控制器中定义的消息。

当我在UserController中键入任何其他端点时，例如 localhost：8080 / user 或 localhost：8080 / get-by-email？email=a@gmail.com 它会抛出404.

请告知我在此代码中缺少的内容。

Answer 1

您正在尝试使用错误的网址。

试试这些：

localhost:8080/user/save?email=a@gmail.com&name=a
localhost:8080/user/get-by-email?email=a@gmail.com

由于您在类@RequestMapping("/user")上使用UserController注释，因此路径"/user"会在此类中的所有请求映射上添加前缀。有关详细信息，请参阅here。

具有Hibernate端点的Spring Boot返回404

1 个答案: