java soap提交数据时乱码问题

在一个项目中，要用java访问.net写的web service。有一个功能是修改用户资料，这就涉及到数据的提交处理。

遇到提交数据时中文乱码问题。原先代码如下的：

String SOAPUrl= BaseUrl.baseUrl+"ProfileService.asmx?op=GetMemberInfoByCardNo";
	 	String SOAPAction = "...................................................";
	     String xml="............."这里省略生成的xml字符串;
	    System.out.println(xml);
	     URL url = new URL(SOAPUrl);
	     URLConnection connection = url.openConnection();
	     HttpURLConnection httpConn = (HttpURLConnection) connection;
	     // Set the appropriate HTTP parameters.
	     httpConn.setRequestProperty( "Content-Length",String.valueOf( xml.length()));
	     httpConn.setRequestProperty("Content-Type","text/xml; charset=utf-8");
	 	httpConn.setRequestProperty("SOAPAction",SOAPAction);
	     httpConn.setRequestMethod( "POST" );
	     httpConn.setDoOutput(true);
	     httpConn.setDoInput(true);
	     // Everything's set up; send the XML that was read in to b.
	     OutputStream out = httpConn.getOutputStream();
	    
	    PrintWriter writer=new PrintWriter(out);
	    osw.write(xml);
	    osw.flush();

 修改一下代码，如下：

String SOAPUrl= BaseUrl.baseUrl+"/ProfileService.asmx?op=GetMemberInfoByCardNo";
	 	String SOAPAction = "...................................................";
	     String xml=".......................";这里省略生成的xml字符串
	    System.out.println(xml);
	     URL url = new URL(SOAPUrl);
	     URLConnection connection = url.openConnection();
	     HttpURLConnection httpConn = (HttpURLConnection) connection;
	     // Set the appropriate HTTP parameters.
	     httpConn.setRequestProperty( "Content-Length",String.valueOf( xml.length()));
	     httpConn.setRequestProperty("Content-Type","text/xml; charset=utf-8");
	 	httpConn.setRequestProperty("SOAPAction",SOAPAction);
	     httpConn.setRequestMethod( "POST" );
	     httpConn.setDoOutput(true);
	     httpConn.setDoInput(true);
	     // Everything's set up; send the XML that was read in to b.
	     OutputStream out = httpConn.getOutputStream();
	     OutputStreamWriter osw=new OutputStreamWriter(out,"utf-8");





	    //PrintWriter writer=new PrintWriter(out);
	    osw.write(xml);




	    osw.flush();

 注意红色粗体部份。将原先的PrintWriter换成OutputStreamWriter，并在构造OutputStreamWriter实例时，用上"utf-8"编码（我的项目中是用utf-8）