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SpringBoot @PostMapping接收HTTP請求的流數(shù)據(jù)問題

更新時間：2023年02月27日 09:01:42 作者：lookbbs

這篇文章主要介紹了SpringBoot @PostMapping接收HTTP請求的流數(shù)據(jù)問題，具有很好的參考價值，希望對大家有所幫助。如有錯誤或未考慮完全的地方，望不吝賜教

@PostMapping接收HTTP請求的流數(shù)據(jù)

@PostMapping("/test")
public String pushMessage(@RequestBody byte[] data) throws Exception {
    String json = URLDecoder.decode(new String(data, DEFAULT_CHARSET), DEFAULT_CHARSET);
    log.info(">>> 接收CP推送的消息：{}", json);
 
    JSONObject jsonObject = JacksonUtils.jsonToBean(json, JSONObject.class);
    System.out.println(jsonObject.get("key"));
    return “success”
}

Client 請求

try {
    //創(chuàng)建連接
    URL url = new URL(ADD_URL);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setDoOutput(true);
    connection.setDoInput(true);
    connection.setRequestMethod("POST");
    connection.setUseCaches(false);
    connection.setInstanceFollowRedirects(true);
    //application/x-javascript 
    //text/xml->xml數(shù)據(jù) 
    //application/x-javascript->json對象 
    //application/x-www-form-urlencoded->表單數(shù)據(jù) 
    //application/json;charset=utf-8 -> json數(shù)據(jù)
    connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    connection.setRequestProperty("accept", "*/*");
    connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
 
    connection.connect();
 
    //POST請求
    DataOutputStream out = new DataOutputStream(connection.getOutputStream());
 
    JSONObject data = new JSONObject();
    data.element("key", "這是一條測試數(shù)據(jù)");
    
    out.writeBytes(data.toString());
    out.flush();
    out.close();
 
    //讀取響應
    BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
    String lines;
    StringBuffer sb = new StringBuffer("");
    while ((lines = reader.readLine()) != null) {
        lines = new String(lines.getBytes(), "utf-8");
        sb.append(lines);
    }
    System.out.println(sb);
    reader.close();
    // 斷開連接
    connection.disconnect();
} catch (MalformedURLException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (UnsupportedEncodingException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

關(guān)于@PostMapping注解解析

開發(fā)過程IDEA提示如將@RequestMapping(value="/abc" , method = “RequestMethod.POST”)替換成@PostMapping?，F(xiàn)對@PostMapping的實現(xiàn)。

@PostMapping是一個復合注解，Spring framework 4.3引入了@RequestMapping注釋的變體，以更好地表示帶注釋的方法的語義，作為@RequestMapping(method = RequestMethod.POST)的快捷方式。

也就是可以簡化成@PostMapping(value="/abc" )即可，主要是方便識記。

下面很多方法都是對應著@RequestMapping的標記的別名。

@RequestMapping(value = “”, path = “”, params = “”, headers = “”,consumes = “”, produces = “”)

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@RequestMapping(method = RequestMethod.POST)
public @interface PostMapping {

	/**
	 * RequestMapping 的別名，
	 */
	@AliasFor(annotation = RequestMapping.class)
	String name() default "";

	/**
	 *RequestMapping#value的別名， 默認為空字符串，一般需要自己填寫
	 */
	@AliasFor(annotation = RequestMapping.class)
	String[] value() default {};

	/**
	 * RequestMapping#path的別名
	 */
	@AliasFor(annotation = RequestMapping.class)
	String[] path() default {};

	/**
	 * RequestMapping#params的別名
	 */
	@AliasFor(annotation = RequestMapping.class)
	String[] params() default {};

	/**
	 * RequestMapping#headers的別名
	 */
	@AliasFor(annotation = RequestMapping.class)
	String[] headers() default {};

	/**
	 * RequestMapping#consumes的別名
	 */
	@AliasFor(annotation = RequestMapping.class)
	String[] consumes() default {};

	/**
	 * RequestMapping#produces的別名
	 */
	@AliasFor(annotation = RequestMapping.class)
	String[] produces() default {};

}

其他變體如下：

@GetMapping、@PutMapping、@PatchMapping和@DeleteMapping，與@PostMapping實現(xiàn)類似