最近在项目中碰到需要获取post请求中的Json格式的参数, 查阅无数博客 , 然而都以无奈告终.
一般我们获取post请求参数用注解 @RequestBody 就可以获得.
然而这次项目中 我在拦截器中获取post 请求参数 , 就用不上 注解@RequestBody.
最后查阅各大资料 , 终于发现了一篇让我 泪流满面的文章 .上代码:
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import com.alibaba.fastjson.JSONObject;
/**
* 获取请求Json数据转换类
*/
public class GetRequestJsonUtils {
public static JSONObject getRequestJsonObject(HttpServletRequest request) throws IOException {
String json = getRequestJsonString(request);
return JSONObject.parseObject(json);
}
/***
* 获取 request 中 json 字符串的内容
*
* @param request
* @return : <code>byte[]</code>
* @throws IOException
*/
public static String getRequestJsonString(HttpServletRequest request)
throws IOException {
String submitMehtod = request.getMethod();
// GET
if (submitMehtod.equals("GET")) {
return new String(request.getQueryString().getBytes("iso-8859-1"),"utf-8").replaceAll("%22", "\"");
// POST
} else {
return getRequestPostStr(request);
}
}
/* @param request
* @return
* @throws IOException
*/
public static byte[] getRequestPostBytes(HttpServletRequest request)
throws IOException {
int contentLength = request.getContentLength();
if(contentLength<0){
return null;
}
byte buffer[] = new byte[contentLength];
for (int i = 0; i < contentLength;)
{
int readlen = request.getInputStream().read(buffer, i,
contentLength - i);
if (readlen == -1) {
break;
}
i += readlen;
}
return buffer;
}
/**
* 描述:获取 post 请求内容
* <pre>
* 举例
* </pre>
* @param request
* @return
* @throws IOException
*/
public static String getRequestPostStr(HttpServletRequest request)
throws IOException {
byte buffer[] = getRequestPostBytes(request);
String charEncoding = request.getCharacterEncoding();
if (charEncoding == null) {
charEncoding = "UTF-8";
}
return new String(buffer, charEncoding);
}
}
就可以获得Json格式的参数啦!
原文地址:
http://blog.youkuaiyun.com/tengdazhang770960436/article/details/50149061