[轉發]SPRING MVC3.2案例講解--SPRING MVC3的@ResponseBody和ResponseEntity

在傳統的開發過程中，我們的控制CONTROLL層通常需要轉向一個JSP視圖；但隨着WEB2.0相關技術的崛起，我們很多時候只需要返回數據即可，而不是一個JSP頁面。

 

SPRING MVC3的@ResponseBody使Controller直接返回數據，而不是直接指向具體的視圖；同時通過

MessageConverter和produces（如produces="text/plain;charset=UTF-8"）可以返回各種格式的數據（XML，json，RSS，TEXT，字節流等),本章只介紹最簡單的使用；

見代碼：

@ResponseBody可以直接返回結果，

而ResponseEntity 可以定義返回的HttpHeaders和HttpStatus，見文章最后的兩張圖

 

@RequestMapping(value="/response", method=RequestMethod.GET)
public class ResponseController {

//http://127.0.0.1:8010/response/annotation
    @RequestMapping("/annotation")
    public @ResponseBody String responseBody() {
        return "The String ResponseBody";
    }


    @RequestMapping("/charset/accept")
    public @ResponseBody String responseAcceptHeaderCharset() {
        return "\u3053\u3093\u306b\u3061\u306f\u4e16\u754c\uff01 (\"Hello world!\" in Japanese)";
    }

//http://127.0.0.1:8010/response/charset/produce
    @RequestMapping(value="/charset/produce", produces="text/plain;charset=UTF-8")
    public @ResponseBody String responseProducesConditionCharset() {
        return "\u3053\u3093\u306b\u3061\u306f\u4e16\u754c\uff01 (\"Hello world!\" in Japanese)";
    }

//http://127.0.0.1:8010/response/entity/status
    @RequestMapping("/entity/status")
    public ResponseEntity<String> responseEntityStatusCode() {
        return new ResponseEntity<String>("The String ResponseBody with custom status code (403 Forbidden)",
                HttpStatus.FORBIDDEN);
    }

//http://127.0.0.1:8010/response/entity/headers
    @RequestMapping("/entity/headers")
    public ResponseEntity<String> responseEntityCustomHeaders() {
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.TEXT_PLAIN);
        return new ResponseEntity<String>("The String ResponseBody with custom header Content-Type=text/plain",
                headers, HttpStatus.OK);
    }

}