java 如何在swing中使用用户名和密码从tomcat服务器上传，下载文件
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/7608428/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
how to upload, download file from tomcat server with username,password in swing
提问by NSR
I want to make a program in swing which connect to tomcat server running locally. with username,password authentication, then user able to upload file in server directory. ie.http://localhost:8080/uploadfiles. from user defined file path , and same as download to the local directory.
我想在swing中制作一个连接到本地运行的tomcat服务器的程序。使用用户名，密码验证，然后用户可以在服务器目录中上传文件。即 http://localhost:8080/uploadfiles。来自用户定义的文件路径，与下载到本地目录相同。
回答by Maurice Perry
Here is one possibility: Download:
这是一种可能性：下载：
URL url = new URL("http://localhost:8080/uploadfiles");
HttpURLConnection con = (HttpURLConnection)url.openConnection();
try {
con.addRequestProperty("Authorization",
"Basic " + encode64(username + ":" + password));
InputStream in = con.getInputStream();
try {
OutputStream out = new FileOutputStream(outFile);
try {
byte buf[] = new byte[4096];
for (int n = in.read(buf); n > 0; n = in.read(buf)) {
out.write(buf, 0, n);
}
} finally {
out.close();
}
} finally {
in.close();
}
} finally {
con.disconnect();
}
Upload:
上传：
URL url = new URL("http://localhost:8080/uploadfiles");
HttpURLConnection con = (HttpURLConnection)uploadUrl.openConnection();
try {
con.setDoOutput(true);
con.setRequestMethod("POST");
con.addRequestProperty("Authorization",
"Basic " + encode64(username + ":" + password));
OutputStream out = con.getOutputStream();
try {
InputStream in = new FileInputStream(inFile);
try {
byte buffer[] = new byte[4096];
for (int n = in.read(buffer); n > 0; n = in.read(buffer)) {
out.write(buffer, 0, n);
}
} finally {
in.close();
}
} finally {
out.close();
}
int code = con.getResponseCode();
if (code != HttpURLConnection.HTTP_OK) {
String msg = con.getResponseMessage();
throw new IOException("HTTP Error " + code + ": " + msg);
}
} finally {
con.disconnect();
}
Now, on the server side, you will need to distinguish between GET and POST requests and handle them accordingly. You will need a library to handle uploads, such as apache FileUpload
现在，在服务器端，您需要区分 GET 和 POST 请求并相应地处理它们。您将需要一个库来处理上传，例如 apache FileUpload
Oh, and on the client side, you will need a library that does Base64 encoding such as apache commons codec
哦，在客户端，您将需要一个执行 Base64 编码的库，例如 apache commons 编解码器
