简易web

1说明

　　监听某端口，当浏览器请求过来时，返回网页信息

2显示效果

3代码

package _1;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;
import java.util.Map;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.OutputStream;
public class wewe {
    /**
     * 启动监听
     * 
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {
        new wewe().demo();
    }
    private void demo() throws IOException {
        String path = getClass().getClassLoader().getResource("").getPath();
        ServerSocket serverSocket = new ServerSocket(666);
        System.out.println("Server is starting " + serverSocket);
        Socket socket = null;
        while (true) {
            socket = serverSocket.accept();
            InputStream is = socket.getInputStream();
            String configs = inputStream2String(is);
            dealConfigs(configs, path, socket);
 
        }
    }
    /**
     * 获取输入
     * 
     * @param in
     * @return
     * @throws IOException
     */
    public String inputStream2String(InputStream in) throws IOException {
        StringBuffer out = new StringBuffer();
        byte[] b = new byte[4096];
        in.read(b);
        out.append(new String(b));
 
        return out.toString();
    }
    /**
     * 处理页面响应
     * 
     * @param configs
     * @throws IOException
     */
    public void dealConfigs(String _configs, String path, Socket socket) throws IOException {
        String[] configs = _configs.split("\r\n");
        Map<String, String> request = new HashMap<>();
        for (String config : configs) {
            if ("".equals(config.trim())) {
                continue;
            }
            if (config.contains(":")) {
                String[] temp = config.split(":");
                request.put(temp[0], temp[1]);
            } else {
                String[] temp = config.split(" ");
                request.put("METHOD", temp[0]);
                request.put("URL", temp[1]);
                request.put("HTTP", temp[2]);
            }
        }
        System.out.println(request);
        if (request.containsKey("URL")) {
            String filepath = path.substring(1, path.length() - 1) + request.get("URL");
            byte[] file = getBytes(filepath);
            output(file, socket);
        }
    }
    /**
     * 把文件转成byte[]
     * 
     * @author wangw40
     * @date 2015年12月14日 下午6:15:06
     * @explain
     * @param filePath
     * @return
     */
    private static byte[] getBytes(String filePath) {
        byte[] buffer = null;
        try {
            File file = new File(filePath);
            FileInputStream fis = new FileInputStream(file);
            ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
            byte[] b = new byte[1000];
            int n;
            while ((n = fis.read(b)) != -1) {
                bos.write(b, 0, n);
            }
            fis.close();
            bos.close();
            buffer = bos.toByteArray();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return buffer;
    }
    public void output(byte[] buff2, Socket socket) throws IOException {
        // response.addHeader("Content-Length", buff2.length + ""); // 设置下载文件大小
        // response.setContentType("image/png");
        // 获取输出流
        OutputStream outputStream = null;
        try {
            outputStream = new BufferedOutputStream(socket.getOutputStream());
            outputStream.write(buff2, 0, buff2.length);
        } finally {
            if (outputStream != null) {
                outputStream.close();
            }
        }
    }
}