CloseableHttpClient类httpclient方法执行linux命令报错

[shirui8653719]

我用httpclient方法执行linux命令时，有些命令可以执行并返回结果，有些命令则返回报错的结果，比如：
我输入‘date’命令，打印出的结果是：{"result":"Wed Aug 3 10:19:17 CST 2016\n","resultCode":"0"}，
而我输入查询端口的命令，‘netstat -tln’，返回的结果就是报错信息，如最下面的红色信息，谁知道这是什么原因，如果我想执行查询端口的命令，应该怎么写，或是添加什么变量？

package touda_web;

import java.io.IOException;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import com.alibaba.fastjson.JSON;
import com.google.common.base.Strings;
import com.google.common.collect.Maps;

public class HttpClientTest {

	public static void main(String[] args) {
		Map<String, String> body = Maps.newHashMap();
		body.put("command", "netstat -tln");// 返回报错信息
                //body.put("command", "date");// 返回正确信息：  {"result":"Wed Aug  3 10:19:17 CST 2016\n","resultCode":"0"}

		body.put("output", "true");
		Map<String, Map<String, String>> requestMap = Maps.newHashMap();
		requestMap.put("Body", body);
		String result = sendRequest("/exec", "182.180.80.101", requestMap);
		System.out.println(result);

	}

	public static String sendRequest(String path, String ip,
			Map<String, Map<String, String>> requestMap) {

		CloseableHttpClient httpclient = null;
		try {
			httpclient = HttpClients.createDefault();

			String port = System.getProperty("httpPort");
			if (Strings.isNullOrEmpty(port)) {
				port = "8787";
			}
			HttpPost post = new HttpPost("http://" + ip + ":" + port + path);
			RequestConfig requestConfig = RequestConfig.custom()
					.setSocketTimeout(5000).setConnectTimeout(5000).build();// 设置请求和传输超时时间
			post.setConfig(requestConfig);

			StringEntity entity = new StringEntity(
					JSON.toJSONString(requestMap));
			post.setEntity(entity);
			HttpResponse response = httpclient.execute(post);
			HttpEntity resEntity = response.getEntity();
			if (response.getStatusLine().getStatusCode() != 200) {
				//System.out.println("The responseCode of {} is {} "+post.getURI()+response.getStatusLine().getStatusCode());
				return null;
			}
			String responseStr = EntityUtils.toString(resEntity, "utf-8");
			EntityUtils.consume(resEntity);
			return responseStr;
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("Failed to sendPublishRequest");
		} finally {
			try {
				httpclient.close();
			} catch (IOException e) {
				// ignore
			}
		}
		return null;

	}
}

下面为报错信息：
{"error":{"@type":"java.util.concurrent.ExecutionException","cause":{"@type":"java.io.IOException","cause":{"@type":"java.io.IOException","localizedMessage":"error=2, No such file or directory","message":"error=2, No such file or directory","stackTrace":[{"className":"java.lang.UNIXProcess","fileName":"UNIXProcess.java","lineNumber":-2,"methodName":"forkAndExec","nativeMethod":true},{"className":"java.lang.UNIXProcess","fileName":"UNIXProcess.java","lineNumber":186,"methodName":"<init>","nativeMethod":false},{"className":"java.lang.ProcessImpl","fileName":"ProcessImpl.java","lineNumber":130,"methodName":"start","nativeMethod":false},{"className":"java.lang.ProcessBuilder","fileName":"ProcessBuilder.java","lineNumber":1028,"methodName":"start","nativeMethod":false},{"className":"java.lang.Runtime","fileName":"Runtime.java","lineNumber":617,"methodName":"exec","nativeMethod":false},{"className":"java.lang.Runtime","fileName":"Runtime.java","lineNumber":485,"methodName":"exec","nativeMethod":false},{"className":"com.pccc.touda.vmclient.http.impl.ExecRunner","fileName":"ExecRunner.java","lineNumber":46,"methodName":"call","nativeMethod":false},{"className":"com.pccc.touda.vmclient.http.impl.ExecRunner","fileName":"ExecRunner.java","lineNumber":1,"methodName":"call","nativeMethod":false},{"className":"java.util.concurrent.FutureTask","fileName":"FutureTask.java","lineNumber":262,"methodName":"run","nativeMethod":false},{"className":"java.util.concurrent.ThreadPoolExecutor","fileName":"ThreadPoolExecutor.java","lineNumber":1145,"methodName":"runWorker","nativeMethod":false},{"className":"java.util.concurrent.ThreadPoolExecutor$Worker","fileName":"ThreadPoolExecutor.java","lineNumber":615,"methodName":"run","nativeMethod":false},{"className":"java.lang.Thread","fileName":"Thread.java","lineNumber":745,"methodName":"run","nativeMethod":false}],"suppressed":[]},"localizedMessage":"Cannot run program \"netstat -tln\": error=2, No such file or directory","message":"Cannot run program \"netstat -tln\": error=2, No such file or directory","stackTrace":[{"className":"java.lang.ProcessBuilder","fileName":"ProcessBuilder.java","lineNumber":1047,"methodName":"start","nativeMethod":false},{"className":"java.lang.Runtime","fileName":"Runtime.java","lineNumber":617,"methodName":"exec","nativeMethod":false},{"className":"java.lang.Runtime","fileName":"Runtime.java","lineNumber":485,"methodName":"exec","nativeMethod":false},{"className":"com.pccc.touda.vmclient.http.impl.ExecRunner","fileName":"ExecRunner.java","lineNumber":46,"methodName":"call","nativeMethod":false},{"className":"com.pccc.touda.vmclient.http.impl.ExecRunner","fileName":"ExecRunner.java","lineNumber":1,"methodName":"call","nativeMethod":false},{"className":"java.util.concurrent.FutureTask","fileName":"FutureTask.java","lineNumber":262,"methodName":"run","nativeMethod":false},{"className":"java.util.concurrent.ThreadPoolExecutor","fileName":"ThreadPoolExecutor.java","lineNumber":1145,"methodName":"runWorker","nativeMethod":false},{"className":"java.util.concurrent.ThreadPoolExecutor$Worker","fileName":"ThreadPoolExecutor.java","lineNumber":615,"methodName":"run","nativeMethod":false},{"className":"java.lang.Thread","fileName":"Thread.java","lineNumber":745,"methodName":"run","nativeMethod":false}],"suppressed":[]},"localizedMessage":"java.io.IOException: Cannot run program \"netstat -tln\": error=2, No such file or directory","message":"java.io.IOException: Cannot run program \"netstat -tln\": error=2, No such file or directory","stackTrace":[{"className":"java.util.concurrent.FutureTask","fileName":"FutureTask.java","lineNumber":122,"methodName":"report","nativeMethod":false},{"className":"java.util.concurrent.FutureTask","fileName":"FutureTask.java","lineNumber":202,"methodName":"get","nativeMethod":false},{"className":"com.pccc.touda.vmclient.http.impl.ExecHandler","fileName":"ExecHandler.java","lineNumber":41,"methodName":"handler","nativeMethod":false},{"className":"com.pccc.touda.vmclient.http.HttpHandler","fileName":"HttpHandler.java","lineNumber":67,"methodName":"handle","nativeMethod":false},{"className":"org.eclipse.jetty.server.handler.HandlerWrapper","fileName":"HandlerWrapper.java","lineNumber":116,"methodName":"handle","nativeMethod":false},{"className":"org.eclipse.jetty.server.Server","fileName":"Server.java","lineNumber":370,"methodName":"handle","nativeMethod":false},{"className":"org.eclipse.jetty.server.AbstractHttpConnection","fileName":"AbstractHttpConnection.java","lineNumber":494,"methodName":"handleRequest","nativeMethod":false},{"className":"org.eclipse.jetty.server.AbstractHttpConnection","fileName":"AbstractHttpConnection.java","lineNumber":982,"methodName":"content","nativeMethod":false},{"className":"org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler","fileName":"AbstractHttpConnection.java","lineNumber":1043,"methodName":"content","nativeMethod":false},{"className":"org.eclipse.jetty.http.HttpParser","fileName":"HttpParser.java","lineNumber":865,"methodName":"parseNext","nativeMethod":false},{"className":"org.eclipse.jetty.http.HttpParser","fileName":"HttpParser.java","lineNumber":240,"methodName":"parseAvailable","nativeMethod":false},{"className":"org.eclipse.jetty.server.AsyncHttpConnection","fileName":"AsyncHttpConnection.java","lineNumber":82,"methodName":"handle","nativeMethod":false},{"className":"org.eclipse.jetty.io.nio.SelectChannelEndPoint","fileName":"SelectChannelEndPoint.java","lineNumber":696,"methodName":"handle","nativeMethod":false},{"className":"org.eclipse.jetty.io.nio.SelectChannelEndPoint$1","fileName":"SelectChannelEndPoint.java","lineNumber":53,"methodName":"run","nativeMethod":false},{"className":"org.eclipse.jetty.util.thread.QueuedThreadPool","fileName":"QueuedThreadPool.java","lineNumber":608,"methodName":"runJob","nativeMethod":false},{"className":"org.eclipse.jetty.util.thread.QueuedThreadPool$3","fileName":"QueuedThreadPool.java","lineNumber":543,"methodName":"run","nativeMethod":false},{"className":"java.lang.Thread","fileName":"Thread.java","lineNumber":745,"methodName":"run","nativeMethod":false}],"suppressed":[]},"resultCode":"1"}
[/code]

[CooyMaster]

我这访问不到你提供的IP，故运行到httpclient.execute(post)就会报错， 运行了你提供的两条命令，在运行到httpclient.execute(post)之前 都不会报错，你可以提供一下你服务端的处理方法

[shirui8653719]

引用 3 楼 asd4393950 的回复:

我这访问不到你提供的IP，故运行到httpclient.execute(post)就会报错， 运行了你提供的两条命令，在运行到httpclient.execute(post)之前 都不会报错，你可以提供一下你服务端的处理方法

嗯，确实，我在服务器端有一个代理服务器，代码比较多。

[CooyMaster]

问题应该出在你服务端，你在排查排出

[qq_15915835]

你这是调用别的的接口吧。和httpclient木有关系啊。还是查查这接口怎么写的吧

[shirui8653719]

引用 1 楼 qq_15915835 的回复:

你这是调用别的的接口吧。和httpclient木有关系啊。还是查查这接口怎么写的吧

不是别人的接口，就是CloseableHttpClient里面的方法，有些命令能执行，有些命令不能执行。