json入参的接口乱码问题解决

 

需求背景：由于一些接口并没有采用常规的form形式，而是用一个json作为入参，形如{"userName":"zhangsan","password":"123456"}.

这种情况下用restTemplate也行，用httpClient也行，但是restTempalte和httpClient都可能有乱码问题。我这里用最原生的UrlConnection来解决，加上一些头部信息，即可解决乱码，很爽。

 

关键代码：

 

---

public static void post(String url, String param ) throws Exception{
        String charset = "UTF-8"; 
        URLConnection connection = new URL(url).openConnection();
        connection.setDoOutput(true);  Triggers POST.
        connection.setRequestProperty("Accept-Charset", charset);
        connection.setRequestProperty("Content-Type", "application/json;charset=" + charset);

        try (OutputStream output = connection.getOutputStream()) {
          output.write(param.getBytes(charset));
        }

        InputStream response = connection.getInputStream();
        String result= InputStreamTOString(response, "UTF-8");
        System.out.println("result^_^"+result);
      }

 

---

 

final static int BUFFER_SIZE = 4096;  
       
     /  

• 将InputStream转换成某种字符编码的String  
• @param in  
• @param encoding  
• @return  
• @throws Exception  
           */  
               public static String InputStreamTOString(InputStream in,String encoding) throws Exception{  
               
              ByteArrayOutputStream outStream = new ByteArrayOutputStream();  
              byte[] data = new byte[BUFFER_SIZE];  
              int count = -1;  
              while((count = in.read(data,0,BUFFER_SIZE)) != -1)  
                  outStream.write(data, 0, count);  
               
              data = null;  
              return new String(outStream.toByteArray(),encoding);  
          }  

 

 

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具体代码我已经封装在V3架构里面的HttpClientUtil的postWithJson方法中，为了保持统一，本方法强制用UTF-8编码。

只要接受3个参数,具体看源码即可。

 

refurl:http://stackoverflow.com/questions/7181534/http-post-using-json-in-java