错误java.lang.NoClassDefFoundError：org / apache / http / client / methods / HttpUriRequest

Question

我正在Dynamic Web项目中使用Eclipse Java EE IDE。 运行我的servlet“ Controleur2”后，会发生此错误：

ERROR HTTP 500
javax.servlet.ServletException: L''exécution de la servlet a lancé une exception
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

cause mère 
java.lang.NoClassDefFoundError: org/apache/http/client/methods/HttpUriRequest
    servlets.ControleurForm.doPost(ControleurForm.java:44)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

cause mère 
java.lang.ClassNotFoundException: org.apache.http.client.methods.HttpUriRequest
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    servlets.ControleurForm.doPost(ControleurForm.java:44)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

这是我的servlet：

Controleur2

package servlets;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


/**
 * Servlet implementation class Controleur2
 */
@WebServlet("/Controleur2")
public class Controleur2 extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public Controleur2() {
        super();

    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        request.setAttribute("orga","salut");
        this.getServletContext().getRequestDispatcher("/index.jsp").forward(request, response);
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        this.doGet(request, response);
    }

}

ControleurForm

    package servlets;

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

import org.apache.http.client.methods.HttpUriRequest;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import dataPackage.Data;
import dataPackage.Model;

/**
 * Servlet implementation class ControleurForm
 */
@WebServlet("/ControleurForm")
public class ControleurForm extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public ControleurForm() {
        super();
        // TODO Auto-generated constructor stub
    }
    public void init() throws ServletException {
        // TODO Auto-generated method stub
        super.init();
        }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request,response);
    }
    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        String orga = request.getParameter("orga"); //lecture des données fournies par l'utilisateur
        Data data = new Data("2018-10-04","2018-10-05","ELECTRICITE DE France","0fe13821-9014-4cc5-a5f9-469a5a04b2e9"); //création de l'objet Data en fonction
        Map<String, Object> map = data.getData(); //appel de la méthode pour récupérer la réponse
        request.setAttribute("datamap",map);
        this.getServletContext().getRequestDispatcher("/charts.jsp").forward(request, response);
    }

}

这是我的JSP文件：

索引

    <?xml version="1.0" encoding="ISO-8859-1" ?>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>StatsAPIViewer</title>
</head>
<body>
<p>Ceci est une page générée depuis une JSP.</p>

<% String attribut = (String) request.getAttribute("orga");
out.println(attribut);%>

        <form method="post" action="controleurform">
   <p>
       <label for="orga">API :</label><br />
       <select name="orga" id="orga">
           <option value="ELECTRICITE">ELECTRICITE</option>
           <option value="ELECTRICITEOA">ELECTRICITEOA</option>
       </select>
   </p>
   <input type="submit" value="Envoyer" />
</form>

</body>
</html>

图表

    <?xml version="1.0" encoding="ISO-8859-1" ?>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

<%@page import="java.util.*" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Your chart</title>
</head>
<body>
Page de graphes
        <p>
        <% 
            String attribut2 = (String) request.getAttribute("data");
            out.println( attribut2 );
            %></p>
</body>
</html>

这是我的java类：

数据类

package dataPackage;

import java.io.IOException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Map;

import org.apache.http.HttpStatus;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;



public class Data {

    private String from;
    private String to;
    private String orga;
    private String client;


    public Data(String pFrom, String pTo, String pOrga, String pClient) {
        from = pFrom;
        to = pTo;
        orga = pOrga;
        client = pClient;
      }



    public Map<String, Object> getData() throws IOException {

        Map<String, Object> mapApp = null;
        String organization = URLEncoder.encode(this.orga, "UTF-8");

        try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
            System.setProperty("jsse.enableSNIExtension", "false");

            final String url = "https://vespa-prd-api1-gmg.rte-france.com/api/portal/v1.3/metrics/reports/api/summary/0?from="+ this.from+"T22%3A00%3A00Z&to="+this.to+"T13%3A23%3A58Z&organization="+organization+"&client="+this.client+"&reportsubtype=trafficAll";
            final HttpGet get = new HttpGet(url);
            get.addHeader("Authorization", "Basic YXBpYWRtaW46Y2hhbmdlbWU=");
            //System.out.println("here");
            //System.out.println(get);
            try (final CloseableHttpResponse response = httpClient.execute(get)) {

                if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
                    System.out.println("Erreur : "+response.getStatusLine().getStatusCode());
                }

                String jsonResponse = EntityUtils.toString(response.getEntity());

                ObjectMapper objectmapper = new ObjectMapper();
                ArrayList<Object> jsonList = objectmapper.readValue(jsonResponse,ArrayList.class);
                //System.out.println(jsonList);

                //JSON PARSER
                final GsonBuilder builder = new GsonBuilder();
                builder.setPrettyPrinting();
                builder.disableHtmlEscaping();
                builder.serializeNulls();
                builder.setLenient();
                final Gson gson = builder.create();

                ArrayList<Object> listFailures = new ArrayList<>();
                ArrayList<Object> listTime = new ArrayList<>();
                ArrayList<Object> listSuccesses = new ArrayList<>();
                ArrayList<Object> listExceptions = new ArrayList<>();
                ArrayList<Object> listNumMessages = new ArrayList<>();




                for(Object truc : jsonList) {
                    String jsonInString = gson.toJson(truc); /**on force à ce qu'il soit reconnu comme json */
                    mapApp = gson.fromJson(jsonInString, new TypeToken<Map<String, Object>>() {}.getType()); //on l'insère dans une map
                    //mapApp.forEach((x,y)-> System.out.println("key : " + x + " , value : " + y));
                    //System.out.println(mapApp.get("totalNumMessages"));
                    listFailures.add(mapApp.get("totalFailures")); //on ajoute la donnée voulue dans la liste
                    listTime.add(mapApp.get("totalProcessingTimeAvg"));
                    listTime.add(mapApp.get("totalNumMessages"));
                    listSuccesses.add(mapApp.get("totalSuccesses"));
                    listExceptions.add(mapApp.get("totalExceptions"));
                    listNumMessages.add(mapApp.get("totalNumMessages"));
                }
            }
            catch (IOException e) {
                System.out.println(e);
            }
        }

        return mapApp;
    }


    public static double sumData(ArrayList<Object> list) {
        double somme=0;
        for (Object objet : list) {
            somme = somme + Double.parseDouble(objet.toString());
        }
        return somme;
    }

    public static double sumTime(ArrayList<Object> list) {
        double somme=0;
        int n = list.size();
        for (int i=0; i<(n-1); i++) {
            i=i+1;
            somme = somme + (Double.parseDouble(list.get(i-1).toString())*(Double.parseDouble(list.get(i).toString())));
        }
        double moy = somme/(n/2);
        return moy;
    }

    public static Map<String, Object> getTimeline(String from, String to, String orga, String client) throws IOException {

        Map<String, Object> mapApp = null;
        String organization = URLEncoder.encode(orga, "UTF-8");

        try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
            System.setProperty("jsse.enableSNIExtension", "false");

            final String url;

            if (client == null) {
                url = "https://vespa-prd-api1-gmg.rte-france.com/api/portal/v1.3/metrics/reports/app/timeline/0/numMessages?from="+from+"T22%3A00%3A00Z&to="+to+"T14%3A46%3A58Z&organization="+organization+"&reportsubtype=trafficAll";
            }
            else {
                url = "https://vespa-prd-api1-gmg.rte-france.com/api/portal/v1.3/metrics/reports/app/timeline/0/numMessages?from="+from+"T22%3A00%3A00Z&to="+to+"T14%3A46%3A58Z&organization="+orga+"&client="+client+"&reportsubtype=trafficAll";
            }

            final HttpGet get = new HttpGet(url);
            get.addHeader("Authorization", "Basic YXBpYWRtaW46Y2hhbmdlbWU=");
            try (final CloseableHttpResponse response = httpClient.execute(get)) {

                if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
                    System.out.println("Erreur : "+response.getStatusLine().getStatusCode());
                }

                String jsonResponse = EntityUtils.toString(response.getEntity());

                ObjectMapper objectmapper = new ObjectMapper();
                objectmapper.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true);
                ArrayList<Object> jsonList = objectmapper.readValue(jsonResponse,ArrayList.class);

                //JSON PARSER
                final GsonBuilder builder = new GsonBuilder();
                builder.setPrettyPrinting();
                builder.disableHtmlEscaping();
                builder.serializeNulls();
                builder.setLenient();
                final Gson gson = builder.create();

                ArrayList<Object> listData= new ArrayList<>();


                for(Object truc : jsonList) {
                    String jsonInString = gson.toJson(truc);
                    mapApp = gson.fromJson(jsonInString, new TypeToken<Map<String, Object>>() {}.getType()); //on l'insère dans une map
                    //mapApp.forEach((x,y)-> System.out.println("key : " + x + " , value : " + y));
                    String jsonSeries = gson.toJson(mapApp.get("series"));

                    ArrayList<Object> jsonList2 = objectmapper.readValue(jsonSeries, ArrayList.class);

                    for (Object truc2 : jsonList2) {
                        String jsonString = gson.toJson(truc2);
                        Map<String, Object> mapApp2 = gson.fromJson(jsonString, new TypeToken<Map<String, Object>>() {}.getType());
                        //mapApp2.forEach((x, y) -> System.out.println("key : " + x + " , value : " + y));
                        listData.add(mapApp2.get("data"));
                    }
                }
                //System.out.println(listData);
            }
        }
        return mapApp;
    }

}

这是我的类路径文件（由Eclipse自动生成）：

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="src"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jre1.8.0_181">
        <attributes>
            <attribute name="owner.project.facets" value="java"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.eclipse.jst.server.tomcat.runtimeTarget/Apache Tomcat v7.0 (2)">
        <attributes>
            <attribute name="owner.project.facets" value="jst.web"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
    <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/gson-2.6.2.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/gson-2.8.5-javadoc.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/jackson-annotations-2.6.0.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/jackson-core-2.6.3.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/jackson-databind-2.6.3.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/jackson-dataformat-csv-2.1.2.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/commons-codec-1.10.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/commons-logging-1.2.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/fluent-hc-4.5.6.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/httpclient-4.5.6.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/httpclient-cache-4.5.6.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/httpclient-win-4.5.6.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/httpcore-4.4.10.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/httpmime-4.5.6.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/jna-4.4.0.jar"/>
    <classpathentry kind="lib" path="C:/Users/piriouame/eclipse-workspace/lib/httpcomponents-client-4.5.6/lib/jna-platform-4.4.0.jar"/>
    <classpathentry kind="output" path="WebContent/WEB-INF/classes"/>
</classpath>

在此先感谢您的帮助：）

Answer 1

请确保将Apache httpclient lib加载到您的类路径中。如果您使用的是maven / gradle，请检查是否已在其中添加了给定的lib。

Answer 2

即使我添加了 httpclient ，使用 keycloak-quickstarts \ app-springboot 时我也遇到了同样的问题：

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.12</version>
            <!-- <scope>test</scope> -->
        </dependency>

所以我刚刚评论了<scope>test</scope>这行，并且效果很好。