Socket通信

项目需求java客户端与C++服务端进行通信，本人对这方面是小白一枚，经过多天查资料，整理了一点，特贴出来，万一哪天用到了，回来瞅一眼，代码如下：

public static final String IP_ADDR = "127.0.0.1";//服务器地址
public static final int PORT = 4999;//服务器端口号
private static DataOutputStream outStr = null;
private static InputStream inStr = null;

public AjaxJson socketMsg() throws IOException {
    AjaxJson ajaxJson = new AjaxJson();
    // String str = new BufferedReader(new InputStreamReader(System.in)).readLine();
    String str = "abc";
    Socket socket = null;
    try {
        //创建一个流套接字并将其连接到指定主机上的指定端口号
        socket = new Socket(IP_ADDR, PORT);
        //读取服务器端数据
        // DataInputStream input = new DataInputStream(socket.getInputStream());
        inStr = socket.getInputStream();
        //向服务器端发送数据
        outStr = new DataOutputStream(socket.getOutputStream());
        outStr.writeUTF(str);
        // String ret = input.readUTF();
        byte[] b = new byte[1024];
        int r = inStr.read(b);
        String ret = "";
        if (r > -1) {
            ret = new String(b);
            System.out.println("服务器端返回过来的是: " + ret);
            System.out.println("客户端将关闭连接");
            ajaxJson.setMsg("请求成功");
            ajaxJson.setSuccess(true);

        }

    } catch (Exception e) {
        System.out.println("客户端异常:" + e.getMessage());
        ajaxJson.setMsg("服务器异常");
        ajaxJson.setSuccess(false);
    }finally {
        outStr.close();
        inStr.close();
        socket.close();
    }
    return ajaxJson;
}