从HttpServletRequest中遍历数据

ゞ浴缸里的玫瑰 2024-04-20 08:27 50阅读 0赞

### **从请求参数中遍历数据：** ###

方式一(推荐)：

@RequestMapping("/param")
        @ResponseBody
        public Object getParameterNames(HttpServletRequest request,@RequestParam Map<String, Object> params) {
            System.out.println("------------------@RequestParam------------------");
            System.out.println(params);
            return R.ok();
        }

方式二：

Map map = new HashMap();  
    	     Enumeration paramNames = request.getParameterNames();  
    	    while (paramNames.hasMoreElements()) {  
    	      String paramName = (String) paramNames.nextElement();  
    	  
    	      String[] paramValues = request.getParameterValues(paramName);  
    	      if (paramValues.length == 1) {  
    	        String paramValue = paramValues[0];  
    	        if (paramValue.length() != 0) {  
    	          System.out.println("参数：" + paramName + "=" + paramValue);  
    	          map.put(paramName, paramValue);  
    	        }  
    	      }  
    	    }

### **请求流中获取数据：** ###

方式一(通用)：

IOUtils.toString(request.getInputStream())

方式二(JSON数据时推荐)：

@RequestMapping("/json")
        @ResponseBody
        public Object login(HttpServletRequest request,@RequestBody Map<String, Object> params) throws IOException {
            System.out.println("-------------------RequestBody-----------------");
            System.out.println(params);
            return R.ok();
        }

有时候对接接口时，不确定对方传输的数据时，可以用以下方式查看请求接口的数据

@RequestMapping("/getdata")
        @ResponseBody
        public Object getdata(HttpServletRequest request,@RequestParam Map<String, Object> params) throws IOException {
            System.out.println("-------------------RequestParam-----------------");
            System.out.println(params);
            String res = IOUtils.toString(request.getInputStream());
            System.out.println("-------------------Stream-----------------");
            System.out.println(res);
            return R.ok();
        }

附图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NodzA2Mjk_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NodzA2Mjk_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/340505f111f04b98a4762d4548fd31e6.png