HttpClient不能实例化的问题怎么解决

[bulajunjun]

测试使用httpclient

public class TestJetty {
public static void main(String[] args) {
HttpClient httpClient = new HttpClient();
GetMethod getMethod = new GetMethod("http://www.baidu.com/");
try {
getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler());
int statusCode = httpClient.executeMethod(getMethod);
if (statusCode != HttpStatus.SC_OK) {
System.err.println("Method failed: " + getMethod.getStatusLine());

}
//读取内容
byte[] responseBody = getMethod.getResponseBody();
//处理内容
System.out.println(new String(responseBody));
} catch (Exception e) {
e.printStackTrace();
}finally{
getMethod.releaseConnection();
}
}
}

但是执行报错：Cannot instantiate the type HttpClient，求大侠帮忙

[dingding300]

jar包没加对吧，每个版本的jar创建的对象记得不太一样，文档里面有实例，复制过来就能用

[dingding300]

new DefaultHttpClient();

[teemai]

少jar包吧？

import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;

public class TestJetty {
	public static void main(String[] args) {
		HttpClient httpClient = new HttpClient();
		GetMethod getMethod = new GetMethod("http://www.baidu.com/");
		try {
			getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
					new DefaultHttpMethodRetryHandler());
			int statusCode = httpClient.executeMethod(getMethod);
			if (statusCode != HttpStatus.SC_OK) {
				System.err.println("Method failed: "
						+ getMethod.getStatusLine());

			}
			// 读取内容
			byte[] responseBody = getMethod.getResponseBody();
			// 处理内容
			System.out.println(new String(responseBody));
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			getMethod.releaseConnection();
		}
	}
}

[身胖不怕影子歪]

我就估计会有人遇到这种问题 别用4.X版本的 用3.X的 升级后那个类变成接口了

[hxqchan]

4楼正解！！！！

[小黄帝]

为什么我的还是3.x版本依然报错呢？

[utopiala]

new DefaultHttpClient(); 正解

[CallmeCharlie]

commons-httpclient.jar这个jar包可以创建HttpClient的实例