Spring Boot中如何通过@Autowired/@Inject注入访问另一个RestController的路径

需求：实现请求路径 localhost:8080/first/second/get-this，访问后控制台输出 Here You Go!，逻辑完全对齐原J2EE实现。

前置依赖 #

确保项目pom.xml中已引入Spring Web starter依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

代码实现 #

1. FirstController 对应原FirstResource #

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.context.annotation.RequestScope;

@RestController
@RequestMapping("/first")
@RequestScope
public class FirstController {

    @Autowired
    private SecondController secondController;

    @RequestMapping("/second")
    public SecondController getSecondController() {
        return secondController;
    }
}

2. SecondController 对应原SecondResource #

import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

@RequestMapping(consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
public class SecondController {

    @GetMapping("/get-this")
    public void getThisMessage() {
        System.out.println("Here You Go!");
    }
}

验证方式 #

• 启动Spring Boot项目后，访问http://localhost:8080/first/second/get-this
• 项目控制台直接打印输出Here You Go!，和原J2EE实现效果完全一致

注解映射说明 #

• JAX-RS的@Path注解对应Spring Web的@RequestMapping/@GetMapping等路径绑定注解
• JAX-RS的@RequestScoped注解对应Spring的@RequestScope请求作用域注解
• JAX-RS的@Inject注解对应Spring的@Autowired依赖注入注解
• JAX-RS的@Consumes/@Produces注解对应Spring请求映射注解中的consumes/produces属性

内容的提问来源于stack exchange，提问作者Mixon Tandukar