URLConnection远程服务调用

最新推荐文章于 2025-07-05 10:32:45 发布

原创最新推荐文章于 2025-07-05 10:32:45 发布 · 157 阅读

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本文介绍了一种通过HTTP POST方式实现文件上传的方法，并详细展示了客户端如何将文件发送到服务器以及服务器端如何接收并保存该文件的过程。此外还讨论了文件名的处理方式以及文件存在的冲突处理策略。

String uploadUrl="http://localhost:7001/gmap/saveFile.do";
InputStream in = item.getInputStream();
URL url = new URL(uploadUrl);
URLConnection urlConn = url.openConnection();
urlConn.setDoOutput(true);
urlConn.setDoInput(true);
//将信息写入URLConnection 中的OutputStream
OutputStream out = new BufferedOutputStream(urlConn.getOutputStream());
byte[] fileNameBytes = fileName.getBytes("utf-8");
int fileNameLen = fileNameBytes.length;
DataOutputStream dout = new DataOutputStream(out);
dout.writeInt(fileNameLen);
dout.flush();
out.write(fileNameBytes);
int len = 0;
byte[] buf = new byte[512];
while ((len = in.read(buf)) > 0) {
	out.write(buf, 0, len);
}
out.close();
in.close();

InputStream urlIn = urlConn.getInputStream(); while ((len = urlIn.read(buf)) > 0) { System.out.println(new String(buf, 0, len)); } urlIn.close();

InputStream in = new BufferedInputStream(request.getInputStream());
DataInputStream din = new DataInputStream(in);
int fileNameLen = din.readInt();
byte[] fileNameBytes = new byte[fileNameLen];
in.read(fileNameBytes);
String fileName = new String(fileNameBytes, "utf-8");
//判断当前文件名是否存在
File file = new File(filePath);
if(!file.exists()){
	byte[] buf = new byte[512];
	int len = 0;
	OutputStream out = new BufferedOutputStream(new FileOutputStream(filePath));
	try {
		while ((len = in.read(buf)) > 0) {
			out.write(buf, 0, len);
		}
		out.close();
		message = "文件读取成功！";
	}catch(Exception e){
		message = "文件[" + fileName + "]写失败！";
	}
	finally {
		in.close();
	}
}else{
	message = "文件[" + fileName + "]已存在！";
}
PrintWriter out = res.getWriter();
out.println(message);
out.close();