HttpClient使用例子

HttpClient client = new HttpClient();
String url = http://localhost:8080/ana/workFlowOaInterface.do?action=oaTask;
PostMethod postMethod = new PostMethod(url);
//设置参数编码为gbk
post.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"gbk");
//构造键值对参数
NameValuePair[] data = { new NameValuePair("processInstanceId", "230"), new NameValuePair("approveFlag", "1") }; 
// 把参数值放入postMethod中 
postMethod.setRequestBody(data);
//执行

int code = client.executeMethod(postMethod);//获取执行结果代码

//读取内容
    byte[] responseBody = postMethod.getResponseBody();
    //处理内容
    System.out.println(new String(responseBody));
        System.out.println("getStatusLine:"+postMethod.getStatusLine());
        System.out.println("~~~"+postMethod.getResponseBodyAsString());
        System.out.println("statusCode:"+statusCode);
        //打印结果页面
        String response =  new String(postMethod.getResponseBodyAsString().getBytes("utf-8"));
       //打印返回的信息
        System.out.println("response:"+response);
//释放连接
postMethod.releaseConnection();