java2: HttpClient，实现登录，请求等操作，session保持
HttpClient，httpclient.jar包中的，我则喜欢折射成类似于dll以用的形式，知道在哪个namespace下
http://hc.apache.org/httpcomponents-client
可以从这里获取或得到些信息
实现的目标：
1.模拟登录
2.登录之后，模拟提交请求
关键点：
1.session状态保持
2.页面隐藏的属性获取
之前用HttpURLConnection，但未成功，瓶颈在于没有绕过session保持上，最终还是使用HttpClient，实现相对容易些
示例代码
（代码有删减，不见得能够跑通，需要修改）
/**
*
*/
package
httpclienttest;
import
java.io.BufferedReader;
import
java.io.BufferedWriter;
import
java.io.File;
import
java.io.FileReader;
import
java.io.FileWriter;
import
java.io.IOException;
import
java.util.ArrayList;
import
java.util.Date;
import
java.util.List;
import
java.util.Random;
import
org.apache.http.HttpEntity;
import
org.apache.http.HttpResponse;
import
org.apache.http.NameValuePair;
import
org.apache.http.client.ClientProtocolException;
import
org.apache.http.client.HttpClient;
import
org.apache.http.client.ResponseHandler;
import
org.apache.http.client.entity.UrlEncodedFormEntity;
import
org.apache.http.client.methods.HttpGet;
import
org.apache.http.client.methods.HttpPost;
import
org.apache.http.cookie.Cookie;
import
org.apache.http.impl.client.BasicResponseHandler;
import
org.apache.http.impl.client.DefaultHttpClient;
import
org.apache.http.message.BasicNameValuePair;
import
org.apache.http.protocol.HTTP;
import
com.alibaba.ccbu.parseelements.ParseTest;
/**
*
@author
forward
*
*/
public
class
LoginFormDemo {
public
static
void
DemoLoginTwo()
throws
Exception {
DefaultHttpClient httpclient
=
new
DefaultHttpClient();
HttpGet httpget
=
new
HttpGet(
http://xxxx.com/xx.htm
);
HttpResponse response
=
httpclient.execute(httpget);
HttpEntity entity
=
response.getEntity();
System.out.println(
"
Login form get:
"
+
response.getStatusLine());
if
(entity
!=
null
) {
entity.consumeContent();
}
System.out.println(
"
Initial set of cookies:
"
);
List
<
Cookie
>
cookies
=
httpclient.getCookieStore().getCookies();
if
(cookies.isEmpty()) {
System.out.println(
"
None
"
);
}
else
{
for
(
int
i
=
0
; i
<
cookies.size(); i
++
) {
System.out.println(
"
-
"
+
cookies.get(i).toString());
}
}
//
action=xxx&Password=xxxx
HttpPost httpost
=
new
HttpPost(
"http://localhost/sss
"
);
List
<
NameValuePair
>
nvps
=
new
ArrayList
<
NameValuePair
>
();
nvps.add(
new
BasicNameValuePair(
"
LoginId
"
,
"xxxx
"
));
nvps.add(
new
BasicNameValuePair(
"
Password
"
,
"
xxxxx
"
));
nvps.add(
new
BasicNameValuePair(
"
action
"
,
"
xxxx
"
));
nvps.add(
new
BasicNameValuePair(
"
eventSubmit_doPost
"
,
"
xxxx
"
));
httpost.setEntity(
new
UrlEncodedFormEntity(nvps, HTTP.UTF_8));
response
=
httpclient.execute(httpost);
entity
=
response.getEntity();
System.out.println(
"
Login form get:
"
+
response.getStatusLine());
if
(entity
!=
null
) {
entity.consumeContent();
}
System.out.println(
"
Time now:
"
+
new
Date().toString());
System.out.println(
"
-------------------1---------------------
"
);
httpget
=
new
HttpGet(http://localhost/test
);
System.out.println(
"
executing request
"
+
httpget.getURI());
//
Create a response handler
ResponseHandler
<
String
>
responseHandler
=
new
BasicResponseHandler();
String responseBody
=
httpclient.execute(httpget, responseHandler);
//
System.out.println(responseBody);
System.out.println(
"
Time now:
"
+
new
Date().toString());
System.out.println(
"
-------------------2---------------------
"
);
// 这里是为了获取页面上的hidden，用来提交的时候继续使用
hidden
=
ParseTest.testTest(responseBody);
System.out.println(csrfToken);
System.out.println(
"
Time now:
"
+
new
Date().toString());
System.out.println(
"
---------------3-post offer begin---------------
"
);
//
post offer
httpost
=
new
HttpPost("
http://local/test");
host
String keywords
=
"
001autop
"
+
randomString(
4
);
nvps
=
new
ArrayList
<
NameValuePair
>
();
//
post时，提交的form信息
nvps.add(
new
BasicNameValuePair(
"
action
"
,
"
xxxxx
"
));
nvps.add(
new
BasicNameValuePair(
"
event_submit_do_process
"
,
"
submit
"
));
nvps.add(
new
BasicNameValuePair(
"
topCatFormKey
"
,
"
58
"
));
nvps.add(
new
BasicNameValuePair(
"
names1
"
,
"xxxx"
));
nvps.add(
new
BasicNameValuePair(
"names2
"
,
"
9.00
"
));
httpost.setEntity(
new
UrlEncodedFormEntity(nvps, HTTP.UTF_8));
responseHandler
=
new
BasicResponseHandler();
responseBody
=
httpclient.execute(httpost, responseHandler);
//
System.out.println(responseBody);
writeFile(
"
E:\\result.html
"
, responseBody);
response
=
httpclient.execute(httpost);
entity
=
response.getEntity();
System.out.println(
"
Login form get:
"
+
response.getStatusLine());
if
(entity
!=
null
) {
entity.consumeContent();
}
System.out.println(
"
Time now:
"
+
new
Date().toString());
System.out.println(
"
---------------3-post offer end----------------
"
);
}
/**
* 产生随机字符串
*
*/
private
static
Random randGen
=
null
;
private
static
char
[] numbersAndLetters
=
null
;
private
static
Object initLock
=
new
Object();
public
static
final
String randomString(
int
length) {
if
(length
<
1
) {
return
null
;
}
if
(randGen
==
null
) {
synchronized
(initLock) {
if
(randGen
==
null
) {
randGen
=
new
Random();
numbersAndLetters
=
(
"
0123456789abcdefghijklmnopqrstuvwxyz
"
+
"
0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ
"
)
.toCharArray();
//
numbersAndLetters =
//
("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ").toCharArray();
}
}
}
char
[] randBuffer
=
new
char
[length];
for
(
int
i
=
0
; i
<
randBuffer.length; i
++
) {
randBuffer[i]
=
numbersAndLetters[randGen.nextInt(
71
)];
//
randBuffer[i] = numbersAndLetters[randGen.nextInt(35)];
}
return
new
String(randBuffer);
}
public
static
void
writeFile(String path, String content) {
String s
=
new
String();
String s1
=
new
String();
try
{
File f
=
new
File(path);
if
(f.exists()) {
System.out.println(
"
文件存在
"
);
f.delete();
}
else
{
}
System.out.println(
"
文件不存在，正在创建...
"
);
if
(f.createNewFile()) {
System.out.println(
"
文件创建成功！
"
);
}
else
{
System.out.println(
"
文件创建失败！
"
);
}
BufferedReader input
=
new
BufferedReader(
new
FileReader(f));
while
((s
=
input.readLine())
!=
null
) {
s1
+=
s
+
"
\n
"
;
}
//
System.out.println("文件内容：" + s1);
input.close();
s1
+=
content;
BufferedWriter output
=
new
BufferedWriter(
new
FileWriter(f));
output.write(s1);
output.close();
}
catch
(Exception e) {
e.printStackTrace();
}
}
}