在傳統(tǒng)的開發(fā)過程中，我們的控制CONTROLL層通常需要轉(zhuǎn)向一個(gè)JSP視圖；但隨著WEB2.0相關(guān)技術(shù)的崛起，我們很多時(shí)候只需要返回?cái)?shù)據(jù)即可，而不是一個(gè)JSP頁面。

?

SPRING MVC3的@ResponseBody使Controller直接返回?cái)?shù)據(jù)，而不是直接指向具體的視圖；同時(shí)通過

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

見代碼：

@ResponseBody可以直接返回結(jié)果，

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

?

[java]?view plaincopy

@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);??

????}??

??

}??

?

?

?

轉(zhuǎn)載于:https://www.cnblogs.com/may-25/p/5485948.html

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