Java Socket长连接示例代码

SocketListenerPusher.java代码如下:

1. import java.io.IOException;
2. import java.net.InetSocketAddress;
3. import java.net.ServerSocket;
4. import java.net.Socket;
5. import java.util.concurrent.ExecutorService;
6. import java.util.concurrent.Executors;
7. import java.util.concurrent.ScheduledThreadPoolExecutor;
8. import java.util.concurrent.TimeUnit;
9. import org.apache.commons.configuration.ConfigurationException;
10. import org.directwebremoting.impl.DaemonThreadFactory;
11. import org.slf4j.Logger;
12. import org.slf4j.LoggerFactory;
13. import com.shihuan.dragonkeeper.common.utils.PropertiesUtil;
14. import com.shihuan.dragonkeeper.global.ConfigFile;
15. public class SocketListenerPusher implements Runnable {
16. protected static Logger logger = LoggerFactory.getLogger(SocketListenerPusher.class);
17. public static String socketlistenerserver_CONFIG = ConfigFile.SOCKETLISTENERSERVER__CONFIG + ConfigFile.SUFFIX_NAME;
18. private ServerSocket serverSocket;
19. private ExecutorService pool;
20. public SocketListenerPusher() {
21. int port = 0;
22. int poolsize = 0;
23. try {
24. port = Integer.parseInt(PropertiesUtil.getPropertiesValue(socketlistenerserver_CONFIG, "serverport"));
25. poolsize = Integer.parseInt(PropertiesUtil.getPropertiesValue(socketlistenerserver_CONFIG, "poolsize"));
26. serverSocket = new ServerSocket();
27. serverSocket.setReuseAddress(true);
28. serverSocket.bind(new InetSocketAddress(port));
29. pool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors() * poolsize);
30. //下面两句循环执行run()方法, 相当于while(true){...}
31. ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1, new DaemonThreadFactory());
32. executor.scheduleAtFixedRate(this, 1L, 1L, TimeUnit.MILLISECONDS);
33. } catch (NumberFormatException e) {
34. logger.error(e.getMessage(), e);
35. e.printStackTrace();
36. } catch (ConfigurationException e) {
37. logger.error(e.getMessage(), e);
38. e.printStackTrace();
39. } catch (IOException e) {
40. logger.error(e.getMessage(), e);
41. e.printStackTrace();
42. }
43. }
44. public void run() {
45. Socket socket = null;
46. try {
47. socket = serverSocket.accept();
48. pool.execute(new SocketListenerHandler(socket));
49. } catch (IOException e) {
50. System.out.println("线程池被关闭!!!!!!!!!!!");
51. pool.shutdown();
52. logger.error(e.getMessage(), e);
53. e.printStackTrace();
54. }
55. }

SocketListenerHandler.java代码如下:

1. import java.io.BufferedInputStream;
2. import java.io.BufferedReader;
3. import java.io.IOException;
4. import java.io.InputStreamReader;
5. import java.io.ObjectInputStream;
6. import java.net.Socket;
7. import java.sql.Connection;
8. import java.sql.SQLException;
9. import org.apache.commons.configuration.ConfigurationException;
10. import org.apache.commons.dbutils.DbUtils;
11. import org.apache.commons.dbutils.QueryRunner;
12. import org.apache.commons.io.IOUtils;
13. import org.directwebremoting.Browser;
14. import org.directwebremoting.ScriptSessions;
15. import org.slf4j.Logger;
16. import org.slf4j.LoggerFactory;
17. import com.alibaba.fastjson.JSON;
18. import com.shihuan.dragonkeeper.common.dto.DataSourceInfo;
19. import com.shihuan.dragonkeeper.common.utils.ByteArrayUtil;
20. import com.shihuan.dragonkeeper.common.utils.DataSourceMapUtil;
21. import com.shihuan.dragonkeeper.common.utils.DateFormatterUtil;
22. import com.shihuan.dragonkeeper.common.utils.PropertiesUtil;
23. import com.shihuan.dragonkeeper.global.ConfigFile;
24. import com.shihuan.dragonkeeper.server.bean.ActivityServiceBean;
25. public class SocketListenerHandler implements Runnable {
26. protected static Logger logger = LoggerFactory.getLogger(SocketListenerHandler.class);
27. private static String jdbc_CONFIG = ConfigFile.JDBC_CONFIG + ConfigFile.SUFFIX_NAME;
28. public static final int timeOut = 0*1000 ;  //设置读取操作异常为1秒
29. private final String dataRealTimeAction_id = "Agentdata_" + Math.random();
30. private static final String noData = "{'nodata':'心跳信息'}";
31. private static final String errorData = "{'error':'无法解析的请求'}";
32. private Socket connectedsocket = null;
33. public SocketListenerHandler(Socket socket){
34. this.connectedsocket = socket;
35. }
36. @Override
37. public void run() {
38. BufferedReader in = null;
39. String resultData = "";
40. try {
41. connectedsocket.setSoTimeout(timeOut);  //表示接收数据时的等待超时数据, 此方法必须在接收数据之前执行才有效. 此外, 当输入流的 read()方法抛出 SocketTimeoutException后, Socket仍然是连接的, 可以尝试再次读数据, 单位为毫秒, 它的默认值为 0(表示会无限等待, 永远不会超时)
42. connectedsocket.setKeepAlive(false);   //表示对于长时间处于空闲状态的Socket, 是否要自动把它关闭.
43. in = new BufferedReader(new InputStreamReader(connectedsocket.getInputStream()));
44. if (in.ready()) {  //判断流中是否有数据
45. resultData = getNoHeadData(in.readLine());   //从Agent端接收到的数据
46. logger.info("#### 结果DATA = "+resultData);
47. if (resultData==null || "".equals(resultData)) {
48. logger.info(dataRealTimeAction_id + " -->>> " + "内容为空!");
49. } else if (resultData.charAt(0) != '{') {  //要在客户端定时维持心跳信息
50. logger.info(dataRealTimeAction_id + " -->>> " + noData);
51. } else {
52. ActivityServiceBean asb = JSON.parseObject(resultData, ActivityServiceBean.class);
53. System.out.println("打印预处理信息Start......");
54. System.out.println(asb.getProxyname() + " -- " + asb.getIp() + " -- " + asb.getCalltime() + " -- " + asb.getAnswertime() + " -- " + asb.getCpu() + " -- " + asb.getThread() + " -- " + asb.getStatus() + " -- " + asb.getAccessaddress() + " -- " + asb.getAccessfilename() + " -- " + asb.getSql() + " -- " + asb.getContent());
55. System.out.println("打印预处理信息End......");
56. //                  parseData(ois);
57. logger.info(dataRealTimeAction_id + ": 成功处理了接收到的数据!");
58. }
59. }
60. } catch (IOException e) {
61. logger.error(e.getMessage() + " " + errorData, e);
62. e.printStackTrace();
63. } catch (NumberFormatException e) {
64. logger.error(e.getMessage(), e);
65. e.printStackTrace();
66. } finally {
67. if (in != null) {
68. try {
69. in.close();
70. } catch (IOException e) {
71. logger.error(e.getMessage(), e);
72. e.printStackTrace();
73. }
74. }
75. }
76. }

TestSocketListenerPusher.java请求端代码如下:

1. import java.io.BufferedOutputStream;
2. import java.io.IOException;
3. import java.io.OutputStream;
4. import java.net.Socket;
5. import java.net.UnknownHostException;
6. import java.util.Date;
7. import org.apache.commons.configuration.ConfigurationException;
8. import com.alibaba.fastjson.JSON;
9. import com.shihuan.dragonkeeper.common.utils.ByteArrayUtil;
10. import com.shihuan.dragonkeeper.common.utils.PropertiesUtil;
11. import com.shihuan.dragonkeeper.global.ConfigFile;
12. import com.shihuan.dragonkeeper.server.bean.ActivityServiceBean;
13. public class TestSocketListenerPusher implements Runnable {
14. private static String socketlistenerserver_CONFIG = ConfigFile.SOCKETLISTENERSERVER__CONFIG + ConfigFile.SUFFIX_NAME;
15. private Socket socketclient = null;
16. @Override
17. public void run() {
18. String serverip = "";
19. int port = 0;
20. OutputStream os = null;
21. try {
22. serverip = PropertiesUtil.getPropertiesValue(socketlistenerserver_CONFIG, "serverip");
23. port = Integer.parseInt(PropertiesUtil.getPropertiesValue(socketlistenerserver_CONFIG, "serverport"));
24. ActivityServiceBean asb = null;
25. for (int i=0; i<2; i++) {
26. asb = new ActivityServiceBean();
27. asb.setProxyname("testProxyname"+i);
28. asb.setIp("testIp"+i);
29. Date curdate = new Date();
30. asb.setCalltime(curdate);
31. asb.setAnswertime(curdate);
32. asb.setCpu("testCpu"+i);
33. asb.setThread("testThread"+i);
34. asb.setStatus("testStatus"+i);
35. asb.setAccessaddress("testAccessaddress"+i);
36. asb.setAccessfilename("testAccessfilename"+i);
37. asb.setSql("testSql"+i);
38. asb.setContent("testContent"+i);
39. String jsonStr = JSON.toJSONString(asb).trim();
40. byte[] information = (new String(ByteArrayUtil.getIntToByte(jsonStr.length()))+jsonStr).getBytes();
41. System.out.println(information.length);
42. socketclient = new Socket(serverip, port);
43. socketclient.setSoTimeout(0);
44. socketclient.setKeepAlive(false);
45. os = new BufferedOutputStream(socketclient.getOutputStream());
46. os.write(information);
47. os.flush();
48. System.out.println("Client" + i + " -->>> " + new String(ByteArrayUtil.getIntToByte(jsonStr.length()))+jsonStr);
49. os.close();
50. Thread.sleep(3000);
51. }
52. } catch (ConfigurationException e) {
53. e.printStackTrace();
54. } catch (UnknownHostException e) {
55. e.printStackTrace();
56. } catch (IOException e) {
57. e.printStackTrace();
58. } catch (InterruptedException e) {
59. e.printStackTrace();
60. } finally {
61. /*
62. try {
63. if (os != null) {
64. os.close();
65. }
66. } catch (IOException e) {
67. e.printStackTrace();
68. }
69. */
70. }
71. }
72. public static void main(String[] args) {
73. Thread t = new Thread(new TestSocketListenerPusher());
74. t.start();
75. }
76. }

源代码在笔者shihuan8@163.com邮箱网盘中J2EE代码文件夹里。 

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如果是按byte[]传输数据的情况,请参考如下代码: 

SimpleSocketServer.java代码如下:

1. package com.shihuan.socket;
2. import java.io.BufferedInputStream;
3. import java.io.IOException;
4. import java.io.InputStream;
5. import java.net.InetSocketAddress;
6. import java.net.ServerSocket;
7. import java.net.Socket;
8. public class SimpleSocketServer {
9. public static void main(String[] args) {
10. try {
11. ServerSocket ss = new ServerSocket();
12. ss.setReuseAddress(true);  //两个进程共用同一个端口的时候,一个进程关闭后,另一个进程还能够立刻重用相同端口
13. ss.setReceiveBufferSize(128*1024);  //缓冲区中允许接收的最大字节数,默认是8192
14. ss.bind(new InetSocketAddress(19990));
15. Socket client = ss.accept();
16. InputStream in = new BufferedInputStream(client.getInputStream());
17. byte tmpb = (byte)in.read();
18. System.out.println("第一个字节的byte值 --->> " + tmpb);
19. System.out.println("接收字节 --->> " + in.available());
20. byte[] bc = new byte[in.available()+1];
21. bc[0] = tmpb;
22. in.read(bc, 1, in.available());
23. System.out.println(bc.length);
24. System.out.println(new String(bc));
25. in.close();
26. } catch (IOException e) {
27. System.out.println(e.getMessage());
28. e.printStackTrace();
29. }
30. }
31. }

SimpleSocketClient.java代码如下:

1. package com.shihuan.socket;
2. import java.io.BufferedOutputStream;
3. import java.io.IOException;
4. import java.io.OutputStream;
5. import java.net.Socket;
6. import java.net.UnknownHostException;
7. public class SimpleSocketClient {
8. public static void main(String[] args) throws UnknownHostException {
9. try {
10. Socket s = new Socket("192.168.1.10", 19990);
11. OutputStream os = new BufferedOutputStream(s.getOutputStream());
12. String info = "abc!";
13. info = "大家好!";
14. byte[] bi = info.getBytes();
15. os.write(bi);
16. os.flush();
17. os.close();
18. } catch (IOException e) {
19. System.out.println(e.getMessage());
20. e.printStackTrace();
21. }
22. }
23. }

稍微复杂一点儿代码示例，处理了粘包问题： 
StartListenerTcpThread.java代码:

1. import java.io.BufferedInputStream;
2. import java.io.IOException;
3. import java.io.InputStream;
4. import java.net.InetSocketAddress;
5. import java.net.ServerSocket;
6. import java.net.Socket;
7. import java.net.SocketAddress;
8. import java.util.Vector;
9. import java.util.concurrent.ExcutorService;
10. import java.util.concurrent.Excutors;
11. import org.apache.commons.io.IUtils;
12. import org.slf4j.Logger;
13. import org.slf4j.LoggerFactory;
14. import com.shihuan.dragonkeeper.common.utils.ByteArrayUtil;
15. import com.shihuan.dragonkeeper.global.ConfigFile;
16. public class StartListenerTcpThread implements Runnable {
17. public static Logger logger = LoggerFactory.getLogger(StartListenerTcpThread.class);
18. private static ExcutorService Threadpool = Excutors.newCachedThreadPool();
19. private static boolean businessflag = true;
20. private static final int receiveBufferSize = 128;
21. private static Vector<byte[]> tmpbytes = new Vector<byte[]>();
22. private ServerSocket serverSocket = null;
23. public StartListenerTcpThread(String ip, int port){
24. try{
25. serverSocket = new ServerSocket();
26. serverSocket.setReuseAddress(true);
27. serverSocket.setReceiveBufferSize(receiveBufferSize*1024);
28. serverSocket.setSoTimeout(0);
29. SocketAddress sa = new InetSocketAddress(port);
30. serverSocket.bind(sa, 20);
31. }catch(IOException e){
32. logger.error(e.getMessage(), e);
33. }
34. }
35. public void run(){
36. Socket socket = null;
37. while(true){
38. if(businessflag){
39. try{
40. socket = serverSocket.accept();
41. System.out.println("New connection accepted " + socket.getInetAddress() + ":" + socket.getPort());
42. InputStream socketIn = new BufferedInputStream(socket.getInputStream());
43. byte tmpb = (byte)socketIn.read();
44. byte[] currentbytes = null;
45. if(tmpbytes.size() > 0){  //上一次IO流中有未处理的剩余包
46. int oldBytesLen = tmpbytes.get(0).length;
47. int socketBytesLen = socketIn.available()+1;
48. int currentLength = oldByteLen + socketBytesLen;
49. currentbytes = new byte[currentLength];
50. System.arraycopy(tmpbytes.get(0), 0, currentbytes, oldBytesLen);
51. currentbytes[oldBytesLen] = tmpb;
52. socketIn.read(currentbytes, oldBytesLen+1, socketBytesLen-1);
53. socketIn.close();
54. splitInputStreamByte(currentbytes);
55. }else{  //正常未粘包情况
56. int socketBytesLen = socketIn.available()+1;
57. currentbytes = new byte[socketBytesLen];
58. currentbytes[0] = tmpb;
59. socketIn.read(currentbytes, 1, socketBytesLen-1);
60. socketIn.close();
61. splitInputStreamByte(currentbytes);
62. }
63. }catch(IOException e){
64. logger.error(e.getMessage(), e);
65. }
66. }
67. }
68. }
69. /**
70. * 拆分byte数组并分多线程处理
71. * @param parambytes 原byte数组
72. * @return 处理后剩余部分的byte数组
73. */
74. private static void splitInputStreamByte(byte[] parambytes) {
75. if(parambytes != null){
76. if(parambytes.length > 4){
77. byte[] head = new byte[4];  //单包长度
78. System.arraycopy(parambytes, 0, head, 0, 4);
79. int bodyLength = ByteArrayUtil.getint(head);
80. if(bodyLength <= parambytes.length-4){
81. final byte[] body = new byte[bodyLength];
82. System.arraycopy(parambytes, 4, body, 0, bodyLength);
83. ThreadPool.execute(new Runnable(){
84. public void run(){
85. byte[] processDatas = body;
86. try{
87. System.out.println(IOUtils.toString(processDatas, "UTF-8").trim());
88. }catch(IOException e){
89. logger.error(e.getMessage(), e);
90. }
91. }
92. });
93. int resultLen = parambytes.length-4-bodyLength;
94. if(resultLen == 0){
95. splitInputStreamByte(null);
96. }else{
97. byte[] resultbytes = new byte[resultLen];
98. System.arraycopy(parambytes, 4+bodyLength, resultbytes, 0, resultLen);
99. splitInputStreamByte(resultbytes);
100. }
101. }else{
102. tmpbytes.clear();
103. tmpbytes.add(parambytes);
104. }
105. }else{
106. tmpbytes.clear();
107. tmpbytes.add(parambytes);
108. }
109. }
110. }
111. public static void openflag(){
112. businessflag = true;
113. }
114. public static void closeflag(){
115. businessflag = false;
116. }
117. }

TestTcpSocket.java代码：

1. import java.io.IOException;
2. import java.io.OutputStream;
3. import java.net.Socket;
4. import java.net.UnknownHostException;
5. import com.shihuan.dragonkeeper.common.utils.ByteArrayUtil;
6. import com.shihuan.dragonkeeper.global.ConfigFile;
7. public class TestTcpSocket implements Runnable{
8. private Socket socketClient = null;
9. public void run(){
10. String serverip = "192.168.1.10";
11. int port = 19990;
12. try{
13. while(true){
14. System.out.println("SocketClient start......");
15. String mystr = "hello everyone!";
16. socketClient = new Socket(serverip, port);
17. OutputStream os = socketClient.getOutputStream();
18. byte[] head = ByteArrayUtil.int2byte(mystr.length());
19. byte[] body = mystr.getBytes();
20. byte[] total = ByteArrayUtil.byteMerge(head, body);
21. os.write(total);
22. os.flush();
23. os.close();
24. Thread.sleep(1000);
25. System.out.println("SocketClient end......");
26. }
27. }catch(Exception e){
28. logger.error(e.getMessage(), e);
29. }
30. }
31. public static void main(String[] args){
32. Thread t = new Thread(new TestTcpSocket());
33. t.start();
34. }
35. }

下面写ByteArrayUtil.java代码：

1. package com.shihuan.dragonkeeper.common.utils;
2. public class ByteArrayUtil {
3. /**
4. * 将int型的数据类型转换成byte[]类型
5. */
6. public static final byte[] int2byte(int paramInt){
7. byte[] resultByte = new byte[4];
8. resultByte[3] = ((byte)(paramInt & 0xFF));
9. resultByte[2] = ((byte)(paramInt >>> 8 & 0xFF));
10. resultByte[1] = ((byte)(paramInt >>> 16 & 0xFF));
11. resultByte[0] = ((byte)(paramInt >>> 24 & 0xFF));
12. return resultByte;
13. }
14. /**
15. * 将byte型的数据类型转换成int类型
16. */
17. public static final int getint(byte[] paramArrayOfByte){
18. int result = (paramArrayOfByte[0] & 0xFF) << 24 | (paramArrayOfByte[1] & 0xFF) << 16 | (paramArrayOfByte[2] & 0xFF) << 8 | paramArrayOfByte[3] & 0xFF;
19. return result;
20. }
21. /**
22. * 合并两个byte数组到一个byte数组中
23. */
24. public static byte[] byteMerge(byte[] byte1, byte[] byte2){
25. byte[] result = new byte[byte1.length+byte2.length];
26. System.arraycopy(byte1, 0, result, 0, byte1.length);
27. System.arraycopy(byte2, 0, result, byte1.length, byte2.length);
28. return result;
29. }
30. }

http://blog.csdn.net/defonds/article/details/8782785