spring boot相关注解说明

2018-11-19springboot点击

1、@RestController

Spring4之后新加入的注解，原来返回json需要@ResponseBody和@Controller配合。

即@RestController是@ResponseBody和@Controller的组合注解。

2、@RequestMapping 配置url映射

3、@PathVariable url参数化

package com.study.spring;

import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("hello")
public class helloDemo {
	
    /**
     * http://localhost:8083/spring-boot-study/hello/info?name=tom&sex=%E7%94%B7
     * @param info
     * @param request
     * @return
     */
    @RequestMapping("{info}")
    public Map<String, String> info(@PathVariable String info, HttpServletRequest request) {
        Map<String, String> map = new HashMap<>();

        String name = request.getParameter("name");
        String sex = request.getParameter("sex");

        map.put("name", name);
        map.put("sex", sex);
        return map;
    }
	
    /**
     * http://localhost:8081/spring-boot-study/hello/is/tom
     * @param username
     * @return
     */
    @RequestMapping("is/{username}")
    public String getUser(@PathVariable String username){
        return "hello, " + username;
    }
}