035.[轉] 獲取HttpServletRequest請求Body中的內容

註意：

HttpServletRequest 請求中的 body 內容僅能調用 request.getInputStream()， request.getReader()和request.getParameter("key") 方法讀取一次，重覆讀取會報 java.io.IOException: Stream closed 異常。
原文：https://blog.csdn.net/pengjunlee/article/details/79416687

public String getBodyString(HttpServletRequest request) throws IOException {
        StringBuilder sb = new StringBuilder();
        InputStream inputStream = null;
        BufferedReader reader = null;
        try {
            inputStream = request.getInputStream();
            reader = new BufferedReader(new InputStreamReader(inputStream, Charset.forName("UTF-8")));
            String line = "";
            while ((line = reader.readLine()) != null) {
                sb.append(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return sb.toString().trim();
    }

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
 
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
 
public class HttpServletRequestReader
{
 
    // 字元串讀取
    // 方法一
    public static String ReadAsChars(HttpServletRequest request)
    {
 
        BufferedReader br = null;
        StringBuilder sb = new StringBuilder("");
        try
        {
            br = request.getReader();
            String str;
            while ((str = br.readLine()) != null)
            {
                sb.append(str);
            }
            br.close();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            if (null != br)
            {
                try
                {
                    br.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }
        return sb.toString();
    }
 
    // 方法二
    public static void ReadAsChars2(HttpServletRequest request)
    {
        InputStream is = null;
        try
        {
            is = request.getInputStream();
            StringBuilder sb = new StringBuilder();
            byte[] b = new byte[4096];
            for (int n; (n = is.read(b)) != -1;)
            {
                sb.append(new String(b, 0, n));
            }
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            if (null != is)
            {
                try
                {
                    is.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }
 
    }
 
    // 二進位讀取
    public static byte[] readAsBytes(HttpServletRequest request)
    {
 
        int len = request.getContentLength();
        byte[] buffer = new byte[len];
        ServletInputStream in = null;
 
        try
        {
            in = request.getInputStream();
            in.read(buffer, 0, len);
            in.close();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            if (null != in)
            {
                try
                {
                    in.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }
        return buffer;
    }
 
}

----------------------

        Enumeration enu=request.getParameterNames();  
        while(enu.hasMoreElements()){  
            String paraName=(String)enu.nextElement();  
            System.out.println(paraName+": "+request.getParameter(paraName));  
        }