HttpClient模拟请求登录的jSessionId无法手动修改的问题

来源：互联网发布：外汇软件怎么买涨买跌编辑：程序博客网时间：2024/06/01 08:31

原因: 当jSessionId失效(发生改变)时必须重新new一个HttpClient

代码

import com.cotton.util.NumberUtil;import org.apache.commons.httpclient.Header;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.NameValuePair;import org.apache.commons.httpclient.methods.PostMethod;import org.apache.commons.lang3.StringUtils;import org.apache.log4j.Logger;import java.util.ArrayList;import java.util.List;import java.util.Map;public class HttpClientUtil {    private static Logger logger = Logger.getLogger(HttpClientUtil.class);    private static HttpClient client = null;    private static String theJSessionId;    public static String post(String url, String[] proxy, String jSessionId, Map<String, String> params) throws Exception {        if (!StringUtils.equals(theJSessionId, jSessionId)) {            logger.warn("new HttpClient");            client = new HttpClient();            theJSessionId = jSessionId;        }        String content = "error";        PostMethod post = new PostMethod(url);        List<Header> headers = new ArrayList<Header>();        headers.add(new Header("Cookie", "JSESSIONID=" + jSessionId));        client.getHostConfiguration().getParams().setParameter("http.default-headers", headers);        NameValuePair[] pairs = new NameValuePair[params.size()];        int i = 0;        for (Map.Entry<String, String> en : params.entrySet()) {            pairs[i] = new NameValuePair(en.getKey(), en.getValue());            i++;        }        post.addParameters(pairs);        if (proxy != null && proxy.length == 2) {            client.getHostConfiguration().setProxy(proxy[0], NumberUtil.toInt(proxy[1]));        }        int code = client.executeMethod(post);        if (code == 200) {            content = post.getResponseBodyAsString();        }        return content;    }}

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