使用URLHttpConnection访问中session的问题解决方案

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package com.custom.test;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;

/***
* 2015-1-29日20:08使用URLHttpConnection访问中session的问题解决方案
*
*/
public class PostTest {
static long sessionCreateTime = 0l;

public synchronized static void createSession() {
if (null == SessionTest.sessionid || "".equals(SessionTest.sessionid)) {
SessionTest.sessionid = getSessionId();
System.out.println("session创建！");
sessionCreateTime = new Date().getTime();
}

// 20分钟后更换session
long nowTime = new Date().getTime();
int min = (int) ((nowTime - sessionCreateTime) / (1000 * 60));
if (min >= 15) {
SessionTest.sessionid = getSessionId();
System.out.println("session重新创建！");
sessionCreateTime = new Date().getTime();
} else {
sessionCreateTime = new Date().getTime();
}

}

private static String getSessionId() {
URL _url;
String sessionid = null;
try {
_url = new URL("http://192.168.0.161:8080/kdb_server/MyJsp.jsp");

HttpURLConnection con = (HttpURLConnection) _url.openConnection();

// 取得sessionid.
String cookieval = con.getHeaderField("Set-Cookie");
System.out.println("cookieval===" + cookieval);
if (cookieval != null) {
sessionid = cookieval.substring(0, cookieval.indexOf(";"));
}
con.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
return sessionid;
}

public void testSavePs() {
try {
URL url = new URL(
"http://192.168.0.161:8080/kdb_server/cus/submitpass.action");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();

createSession();
if (null != SessionTest.sessionid
|| !"".equals(SessionTest.sessionid)) {
System.out.println(("App.sessionId=" + SessionTest.sessionid));
conn.setRequestProperty("Cookie", SessionTest.sessionid);
}
conn.setRequestMethod("POST");// 提交模式
conn.setDoOutput(true);// 是否输入参数

StringBuffer params = new StringBuffer();
// 表单参数与get形式一样
params.append("USER_TEL").append("=").append("18791473412");//
byte[] bypes = params.toString().getBytes();
conn.getOutputStream().write(bypes);// 输入参数
InputStream inStream = conn.getInputStream();
System.out.println(new String(StreamTool.readInputStream(inStream),
"gbk"));
} catch (Exception e) {
e.printStackTrace();
}
}

public void sendEms() throws Exception {
URL url = new URL(
"http://192.168.0.161:8080/kdb_server/cus/getcode.action");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();

createSession();
if (null != SessionTest.sessionid || !"".equals(SessionTest.sessionid)) {
// Log.e(App.Log.app_name,"App.sessionId="+TestSession.sessionid);
System.out.println(("App.sessionId=" + SessionTest.sessionid));
conn.setRequestProperty("Cookie", SessionTest.sessionid);
}

conn.setRequestMethod("POST");// 提交模式
// conn.setConnectTimeout(10000);//连接超时单位毫秒
// conn.setReadTimeout(2000);//读取超时单位毫秒
conn.setDoOutput(true);// 是否输入参数

StringBuffer params = new StringBuffer();
// 表单参数与get形式一样
params.append("USER_TEL").append("=").append("18791473412");// .append("&").append("btnSearch").append("=").append(btnSearch);
byte[] bypes = params.toString().getBytes();
conn.getOutputStream().write(bypes);// 输入参数
InputStream inStream = conn.getInputStream();
System.out.println(new String(StreamTool.readInputStream(inStream),
"gbk"));

testSavePs();
}

public static void main(String[] args) {
try {
new PostTest().sendEms();
} catch (Exception e) {
e.printStackTrace();
}
}

}

package com.custom.test;

import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;

public class SessionTest {
public static String sessionid;
static long sessionCreateTime = 0l;

public synchronized static void createSession() {
if (null == SessionTest.sessionid || "".equals(SessionTest.sessionid)) {
SessionTest.sessionid = getSessionId();
System.out.println("session创建！");
sessionCreateTime = new Date().getTime();
}

// 20分钟后更换session
long nowTime = new Date().getTime();
int min = (int) ((nowTime - sessionCreateTime) / (1000 * 60));
if (min >= 15) {
SessionTest.sessionid = getSessionId();
System.out.println("session重新创建！");
sessionCreateTime = new Date().getTime();
} else {
sessionCreateTime = new Date().getTime();
}

}

private static String getSessionId() {
URL _url;
String sessionid = null;
try {
_url = new URL("http://192.168.0.161:8080/kdb_server/MyJsp.jsp");

HttpURLConnection con = (HttpURLConnection) _url.openConnection();

// 取得sessionid.
String cookieval = con.getHeaderField("Set-Cookie");
System.out.println("cookieval===" + cookieval);
if (cookieval != null) {
sessionid = cookieval.substring(0, cookieval.indexOf(";"));
}
con.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
return sessionid;
}

public void postTest() {
String uriAPI = "http://192.168.0.161:8080/kdb_server/cus/getcode.action";
/* 建立HTTP Post连线 */
HttpPost httpRequest = new HttpPost(uriAPI);
createSession();
httpRequest.addHeader("Cookie", SessionTest.sessionid);
// Post运作传送变数必须用NameValuePair[]阵列储存
// 传参数服务端获取的方法为request.getParameter("name")
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("USER_TEL", "1879147342"));
try {

// 发出HTTP request
httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
// 取得HTTP response
HttpResponse httpResponse = new DefaultHttpClient()
.execute(httpRequest);

// 若状态码为200 ok
if (httpResponse.getStatusLine().getStatusCode() == 200) {
// 取出回应字串
// String
// strResult=EntityUtils.toString(httpResponse.getEntity());
// textView1.setText(strResult);
} else {
// textView1.setText("Error Response"+httpResponse.getStatusLine().toString());
}
} catch (Exception e) {
e.printStackTrace();
}
postTest2();
}

public void postTest2() {
String uriAPI = "http://192.168.0.161:8080/kdb_server/cus/submitpass.action";
/* 建立HTTP Post连线 */
HttpPost httpRequest = new HttpPost(uriAPI);
createSession();
httpRequest.addHeader("Cookie", SessionTest.sessionid);
// Post运作传送变数必须用NameValuePair[]阵列储存
// 传参数服务端获取的方法为request.getParameter("name")
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("USER_TEL", "1879147342"));
try {

// 发出HTTP request
httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
// 取得HTTP response
HttpResponse httpResponse = new DefaultHttpClient()
.execute(httpRequest);

// 若状态码为200 ok
if (httpResponse.getStatusLine().getStatusCode() == 200) {
// 取出回应字串
// String
// strResult=EntityUtils.toString(httpResponse.getEntity());
// textView1.setText(strResult);
} else {
// textView1.setText("Error Response"+httpResponse.getStatusLine().toString());
}
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
new SessionTest().postTest();
}
}

package com.custom.test;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

public class StreamTool {
/**
* 从输入流中读取数据
* @param inStream
* @return
* @throws Exception
*/
public static byte[] readInputStream(InputStream inStream) throws Exception{
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while( (len = inStream.read(buffer)) !=-1 ){
outStream.write(buffer, 0, len);
}
byte[] data = outStream.toByteArray();//网页的二进制数据
outStream.close();
inStream.close();
return data;
}
}

参考原文：http://bbs.9ria.com/thread-246113-1-1.html

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