org.apache.commons.httpclient的jar包的使用
1.创建HttpClient实例HttpClient client = new HttpClient();
2.创建某种连接方法的实例（post或get）
PostMethod postMethod = new PostMethod(url);
// 填入各个表单域的值
NameValuePair[] data = { new NameValuePair("name", "root"), new NameValuePair("password","pwd")};
// 将表单的值放入postMethod中
postMethod.setRequestBody(data);
// 执行postMethod
int statusCode = httpClient.executeMethod(postMethod);
//读取内容
byte[] responseBody = postMethod.getResponseBody();
//转换
collectionResult = new String(responseBody);
System.out.println("返回值为:"+collectionResult);
//释放链接
postMethod.releaseConnection();
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