目前在对Android的代码进行功能测试的时候，需要服务器返回一个数据来测试整个流程是否正确。不希望引入第三方的JAR包，因此需要一个特别简单的HTTP服务器。
网上查询了一下，找到可用的代码如下：
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import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.PrintWriter; import java.net.ServerSocket; import java.net.Socket; import java.util.Date; import java.util.StringTokenizer; // The tutorial can be found just here on the SSaurel's Blog : // https://www.ssaurel.com/blog/create-a-simple-http-web-server-in-java // Each Client Connection will be managed in a dedicated Thread public class JavaHTTPServer implements Runnable{ static final File WEB_ROOT = new File("."); static final String DEFAULT_FILE = "index.html"; static final String FILE_NOT_FOUND = "404.html"; static final String METHOD_NOT_SUPPORTED = "not_supported.html"; // port to listen connection static final int PORT = 8080; // verbose mode static final boolean verbose = true; // Client Connection via Socket Class private Socket connect; public JavaHTTPServer(Socket c) { connect = c; } public static void main(String[] args) { try { ServerSocket serverConnect = new ServerSocket(PORT); System.out.println("Server started.\nListening for connections on port : " + PORT + " ...\n"); // we listen until user halts server execution while (true) { JavaHTTPServer myServer = new JavaHTTPServer(serverConnect.accept()); if (verbose) { System.out.println("Connecton opened. (" + new Date() + ")"); } // create dedicated thread to manage the client connection Thread thread = new Thread(myServer); thread.start(); } } catch (IOException e) { System.err.println("Server Connection error : " + e.getMessage()); } } @Override public void run() { // we manage our particular client connection BufferedReader in = null; PrintWriter out = null; BufferedOutputStream dataOut = null; String fileRequested = null; try { // we read characters from the client via input stream on the socket in = new BufferedReader(new InputStreamReader(connect.getInputStream())); // we get character output stream to client (for headers) out = new PrintWriter(connect.getOutputStream()); // get binary output stream to client (for requested data) dataOut = new BufferedOutputStream(connect.getOutputStream()); // get first line of the request from the client String input = in.readLine(); // we parse the request with a string tokenizer StringTokenizer parse = new StringTokenizer(input); String method = parse.nextToken().toUpperCase(); // we get the HTTP method of the client // we get file requested fileRequested = parse.nextToken().toLowerCase(); // we support only GET and HEAD methods, we check if (!method.equals("GET") && !method.equals("HEAD")) { if (verbose) { System.out.println("501 Not Implemented : " + method + " method."); } // we return the not supported file to the client File file = new File(WEB_ROOT, METHOD_NOT_SUPPORTED); int fileLength = (int) file.length(); String contentMimeType = "text/html"; //read content to return to client byte[] fileData = readFileData(file, fileLength); // we send HTTP Headers with data to client out.println("HTTP/1.1 501 Not Implemented"); out.println("Server: Java HTTP Server from SSaurel : 1.0"); out.println("Date: " + new Date()); out.println("Content-type: " + contentMimeType); out.println("Content-length: " + fileLength); out.println(); // blank line between headers and content, very important ! out.flush(); // flush character output stream buffer // file dataOut.write(fileData, 0, fileLength); dataOut.flush(); } else { // GET or HEAD method if (fileRequested.endsWith("/")) { fileRequested += DEFAULT_FILE; } File file = new File(WEB_ROOT, fileRequested); int fileLength = (int) file.length(); String content = getContentType(fileRequested); if (method.equals("GET")) { // GET method so we return content byte[] fileData = readFileData(file, fileLength); // send HTTP Headers out.println("HTTP/1.1 200 OK"); out.println("Server: Java HTTP Server from SSaurel : 1.0"); out.println("Date: " + new Date()); out.println("Content-type: " + content); out.println("Content-length: " + fileLength); out.println(); // blank line between headers and content, very important ! out.flush(); // flush character output stream buffer dataOut.write(fileData, 0, fileLength); dataOut.flush(); } if (verbose) { System.out.println("File " + fileRequested + " of type " + content + " returned"); } } } catch (FileNotFoundException fnfe) { try { fileNotFound(out, dataOut, fileRequested); } catch (IOException ioe) { System.err.println("Error with file not found exception : " + ioe.getMessage()); } } catch (IOException ioe) { System.err.println("Server error : " + ioe); } finally { try { in.close(); out.close(); dataOut.close(); connect.close(); // we close socket connection } catch (Exception e) { System.err.println("Error closing stream : " + e.getMessage()); } if (verbose) { System.out.println("Connection closed.\n"); } } } private byte[] readFileData(File file, int fileLength) throws IOException { FileInputStream fileIn = null; byte[] fileData = new byte[fileLength]; try { fileIn = new FileInputStream(file); fileIn.read(fileData); } finally { if (fileIn != null) fileIn.close(); } return fileData; } // return supported MIME Types private String getContentType(String fileRequested) { if (fileRequested.endsWith(".htm") || fileRequested.endsWith(".html")) return "text/html"; else return "text/plain"; } private void fileNotFound(PrintWriter out, OutputStream dataOut, String fileRequested) throws IOException { File file = new File(WEB_ROOT, FILE_NOT_FOUND); int fileLength = (int) file.length(); String content = "text/html"; byte[] fileData = readFileData(file, fileLength); out.println("HTTP/1.1 404 File Not Found"); out.println("Server: Java HTTP Server from SSaurel : 1.0"); out.println("Date: " + new Date()); out.println("Content-type: " + content); out.println("Content-length: " + fileLength); out.println(); // blank line between headers and content, very important ! out.flush(); // flush character output stream buffer dataOut.write(fileData, 0, fileLength); dataOut.flush(); if (verbose) { System.out.println("File " + fileRequested + " not found"); } } } |