use*_*412 11 java model-view-controller spring-mvc gradle spring-boot
我开始学习Spring Boot了.我正在努力找到一个包含多个RestControllers的例子,它向我表明我可能做错了什么.我正在尝试一个非常简单的例子:目标是进行如下调用:
localhost:8080/
localhost:8080/employees/bob
localhost:8080/departments
我只能得到localhost:8080 /来显示.其他调用返回响应:此应用程序没有/ error的显式映射,因此您将此视为回退.
com.demo.departments
Department.java
DepartmentController.java
com.demo.employees
Employee.java
EmployeeController.java
com.demo
BootDemoApplication.java
码:
package com.demo.departments
@RestController
@RequestMapping("/departments")
public class DepartmentController {
@RequestMapping("")
public String get(){
return "test..";
}
@RequestMapping("/list")
public List<Department> getDepartments(){
return null;
}
}
--------------------------------------------------------------------
package com.demo.employees
@RestController
@RequestMapping("/employees")
public class EmployeeController {
Employee e =new Employee();
@RequestMapping(value = "/{name}", method = RequestMethod.GET, produces = "application/json")
public Employee getEmployeeInJSON(@PathVariable String name) {
e.setName(name);
e.setEmail("employee1@genuitec.com");
return e;
}
}
-----------------------------------------------------------------------
package com.demo
@RestController
@SpringBootApplication
public class BootDemoApplication {
public static void main(String[] args) {
SpringApplication.run(BootDemoApplication.class, args);
}
@RequestMapping("/")
String home(){
return "<html> This is the home page for Boot Demo.</html>";
}
Vie*_*tDD 14
我正在尝试Spring Boot并遇到同样的问题,并且修复了它,我在这里发布我的解决方案,因为我觉得它对某些人有帮助.
首先,将应用程序类(包含main方法)放在控制器包的根目录下:
Run Code Online (Sandbox Code Playgroud)com.example.demo | +-> controller | | | +--> IndexController.java | +--> LoginController.java | +-> Application.java
Application.java
package com.example.demo;
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);
}
}
Spring将扫描演示包的子包的所有组件
IndexController.java(返回index.html视图)
package com.example.demo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping(value = {""})
public class IndexController {
@GetMapping(value = {""})
public ModelAndView index() {
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("index");
return modelAndView;
}
}
LoginController.java(返回login.html视图)
package com.example.demo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping(value = {"/login"})
public class LoginController {
@GetMapping(value = {""})
public ModelAndView login() {
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("login");
return modelAndView;
}
}
现在我可以进入索引视图:http:// localhost:8080/demo /和登录视图:http:// localhost:8080/demo/login
显然,在主类中使用@springbootApplication表示法无法看到不同包中的控制器.这里解释的解决方案,https://kamwo.me/java-spring-boot-mvc-ontroller-not-called/.
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