采用Jakarta的HttpClient API模拟客户端GET和POST提交

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Java Apache Security 嵌入式应用服务器

最近搞一个扣网页内容的SessionBean，需要模拟客户端post提交，然后得到servlet返回的结果。
采用Jakarta的HttpClient API解决之.
HttpClient扩展和增强了标准java.net包，是一个内容广泛的代码库，功能极其丰富，能够构造出各
种使用HTTP协议的分布式应用，或者也可以嵌入到现有应用，为应用增加访问HTTP协议的能力

要求：
1：CLASSPATH中有commons-httpclient.jar，common-logging.jar
2：确保%JAVA_HOME% /jre/lib/security/java.security文件包含这行代码：
security.provider.2= com.sun.net.ssl.internal.ssl.Provider。

一:GET方法测试代码:

*CreatedonSep25,2006

*Tochangethetemplateforthisgeneratedfilegoto

*Window>Preferences>Java>CodeGeneration>CodeandComments

packageco.iproxy.http;

importjava.io.IOException;

importorg.apache.commons.httpclient.HttpClient;

importorg.apache.commons.httpclient.HttpException;

importorg.apache.commons.httpclient.HttpStatus;

importorg.apache.commons.httpclient.methods.GetMethod;

/**

*@authorlichunlei

*Tochangethetemplateforthisgeneratedtypecommentgoto

*Window>Preferences>Java>CodeGeneration>CodeandComments

publicclassHttpClientGetMethodTest

{

publicstaticvoidmain(String[]args)

{

HttpClientclient=newHttpClient();

Stringurl=http://192.18.0.19:9080/care/careTest/index.jsp;

GetMethodmethod=newGetMethod(url);

try

{

client.executeMethod(method);

if(method.getStatusCode()==HttpStatus.SC_OK)

{

Stringresponse=method.getResponseBodyAsString();

System.out.println(response);

}

catch(HttpExceptione)

{

e.printStackTrace();

}

catch(IOExceptione)

{

e.printStackTrace();

}

finally

{

method.releaseConnection();

method.recycle();

}

二:POST方法测试代码:

*CreatedonSep25,2006

*Tochangethetemplateforthisgeneratedfilegoto

*Window>Preferences>Java>CodeGeneration>CodeandComments

packageco.iproxy.http;

importjava.io.BufferedReader;

importjava.io.ByteArrayInputStream;

importjava.io.File;

importjava.io.FileNotFoundException;

importjava.io.FileReader;

importjava.io.IOException;

importjava.io.InputStream;

importorg.apache.commons.httpclient.DefaultMethodRetryHandler;

importorg.apache.commons.httpclient.HostConfiguration;

importorg.apache.commons.httpclient.HttpClient;

importorg.apache.commons.httpclient.HttpStatus;

importorg.apache.commons.httpclient.methods.PostMethod;

/**

*@authorlichunlei

*Tochangethetemplateforthisgeneratedtypecommentgoto

*Window>Preferences>Java>CodeGeneration>CodeandComments

publicclassHttpClientPostMethodTest

{

staticintBASE_BODY_SIZE=10240;

staticintINC_BODY_SIZE=51200;

publicstaticvoidmain(String[]args)

{

Stringrequest=null;

Stringurl=http://12.20.69.50:5080/Web/Servicelet;

Stringresult=null;

StringfilePath="D:/OPS_piese_idl36(fromcvs)/Ntelagent/co/iproxy/http/request.txt";

Filef=newFile(filePath);

FileReaderfileReader=null;

try

{

fileReader=newFileReader(f);

BufferedReaderbufferedReader=newBufferedReader(fileReader);

StringcurrentLine;

StringBuffercontent=newStringBuffer();

while((currentLine=bufferedReader.readLine())!=null)

{

content.append(currentLine);

}

request=content.toString();

}

catch(Exceptione1)

{

//TODOAuto-generatedcatchblock

e1.printStackTrace();

}

System.out.println("therequestis:"+request);

DefaultMethodRetryHandlerretryhandler=newDefaultMethodRetryHandler();

retryhandler.setRequestSentRetryEnabled(true);

retryhandler.setRetryCount(2);//retry2times

HttpClienthttpClient=newHttpClient();

PostMethodmethod=newPostMethod(url);

InputStreamdata=newByteArrayInputStream(request.getBytes());

method.setRequestBody(data);

method.setFollowRedirects(true);

method.setMethodRetryHandler(retryhandler);

try

{

//executethemethod

HostConfigurationcf=newHostConfiguration();

System.out.println("useproxy");

cf.setProxy("192.18.254.22",4480);

httpClient.setHostConfiguration(cf);

//httpClient.setTimeout(10000000);

intretcode=httpClient.executeMethod(method);

if(retcode==HttpStatus.SC_OK)

{

byte[]responseBody=newbyte[BASE_BODY_SIZE];

java.io.InputStreamistream=method.getResponseBodyAsStream();

intnpos=0;

intnread=0;

while((nread=istream.read(responseBody,npos,responseBody.length-npos))>=0)

{

npos+=nread;

if(npos>=responseBody.length)

{

byte[]tmpBuf=newbyte[npos+INC_BODY_SIZE];

System.arraycopy(responseBody,0,tmpBuf,0,npos);

responseBody=tmpBuf;

}

result=newString(responseBody,0,npos);

}

else

{

thrownewIOException("failedtosendrequest:retcode:"+retcode);

}

catch(Exceptione)

{

}

finally

{

System.out.println("lcltestinhttpClient:"+result);

}

以上两个class已经包含了大部分常用的模拟http客户端的技术了,包括设置代理服务器,提交表单,得到返回结果等.
通过上面的测试代码,已经可以初步解决扣网页的问题了.现在备份一下我的实现方法(不是很通用,需要进一步完善), 同时也供大家参考.

*CreatedonSep25,2006

*Tochangethetemplateforthisgeneratedfilegoto

*Window>Preferences>Java>CodeGeneration>CodeandComments

packageco.iproxy.http;

importjava.io.ByteArrayInputStream;

importjava.io.IOException;

importjava.io.InputStream;

importjava.net.MalformedURLException;

importorg.apache.commons.httpclient.DefaultMethodRetryHandler;

importorg.apache.commons.httpclient.HostConfiguration;

importorg.apache.commons.httpclient.HttpClient;

importorg.apache.commons.httpclient.HttpStatus;

importorg.apache.commons.httpclient.methods.PostMethod;

/**

*@authorlichunlei

*Tochangethetemplateforthisgeneratedtypecommentgoto

*Window>Preferences>Java>CodeGeneration>CodeandComments

publicclassHttpServiceimplementsServiceInterface{

privateHttpClienthttpClient=newHttpClient();

privateDefaultMethodRetryHandlerretryhandler=null;

privateStringurl=null;

staticintBASE_BODY_SIZE=10240;

staticintINC_BODY_SIZE=51200;

publicHttpService()throwsMalformedURLException{

this.createMethodRetryHandler();

this.setHostConfiguration();

}

privatevoidcreateMethodRetryHandler(){

retryhandler=newDefaultMethodRetryHandler();

retryhandler.setRequestSentRetryEnabled(true);

retryhandler.setRetryCount(2);//retry2times

}

privatevoidsetHostConfiguration()throwsMalformedURLException{

this.url=http://12.20.69.80:4080/Web/Servicelet;

Stringhost="12.21.6.81";

intport=5080;

Stringprotocol="http";

if(url!=null&&color: #000000

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EXCEL VBA]EXCEL中用递归实现任意n(3≤n ... | 使用XStream需注意的问题

2006-09-28 13:07
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