HttpClient uses the post method to submit the data source code:
The code copy is as follows:
package post;
import Java.io.IOException;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.PostMethod;
public class PostHttp {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
HttpClient httpClient = new HttpClient();
String url = "http://193.167.13.21/setup.cgi";
PostMethod postMethod = new PostMethod(url);
//Fill in the values of each form field
NameValuePair[] data = {
new NameValuePair("ID", "11"),
new NameValuePair("mtg", "0"),
new NameValuePair("haveCookie", "0"),
new NameValuePair("backID", "30"),
new NameValuePair("psw", "password")
};
// Put the value of the form into the postMethod
postMethod.setRequestBody(data);
// Execute postMethod
int statusCode = 0;
try {
statusCode = httpClient.executeMethod(postMethod);
} catch (HttpException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// HttpClient cannot automatically handle forwarding for requests that require subsequent services such as POST and PUT.
// 301 or 302
if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_MOVED_TEMPORARILY)
{
// Take out the address of the steering from the beginning
Header locationHeader = postMethod.getResponseHeader("location");
String location = null;
if (locationHeader != null) {
location = locationHeader.getValue();
System.out.println("The page was redirected to:" + location);
}
else {
System.err.println("Location field value is null.");
}
return;
}
else
{
System.out.println(postMethod.getStatusLine());
String str = "";
try {
str = postMethod.getResponseBodyAsString();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(str);
}
postMethod.releaseConnection();
return ;
}
}
//This is the login information of a user authentication process
The required jar package:
1. commons-httpclient-3.1-rc1.zip http://jakarta.apache.org/commons/httpclient/downloads.html
2. commons-codec-1.3.jar http://jakarta.apache.org/site/downloads/downloads_commons-codec.cgi
3. commons-logging-api.jar In the Tomcat 5.5/bin directory in tomcat5.5 or http://jakarta.apache.org/site/downloads/downloads_commons-logging.cgi