【发布时间】：2018-08-24 21:08:21
【问题描述】：
我一直在尝试使用 Java 1.8 使用 RestHighLevelClient 连接到弹性搜索（6.2.4）。我已经添加了所有依赖项，并且在一个简单的 jsp 中使用了以下代码。
sample.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@page import="java.util.*" %>
<%@page import="java.io.*" %>
<%@page import="com.google.gson.*" %>
<%@page import="org.apache.http.*"%>
<%@page import= "org.elasticsearch.client.*"%>
<%@page import= "org.elasticsearch.common.document.*"%>
<%@page import= "org.elasticsearch.index.query.*"%>
<%@page import= "org.elasticsearch.action.get.*"%>
<%@page import= "org.elasticsearch.search.*"%>
<%@page import= "org.elasticsearch.search.fetch.subphase.*"%>
<%@page import= "org.elasticsearch.search.builder.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Elastic Report</title>
</head>
<body>
<%
RestHighLevelClient client=null;
Gson gson = new Gson();
try{
client = new RestHighLevelClient(
RestClient.builder(new HttpHost("xx.yy.xx.zz", 9201, "http")));
GetRequest getRequest = new GetRequest(
"samples",
"sample",
"xxxxxxxxxx");
String[] includes = new String[]{"ip"};
String[] excludes = {};
FetchSourceContext fetchSourceContext =
new FetchSourceContext(true, includes, excludes);
getRequest.fetchSourceContext(fetchSourceContext);
GetResponse getResponse = client.get(getRequest);
if(getResponse.isExists()){
Map<String,DocumentField> fields = getResponse.getFields();
String json = gson.toJson(fields);
out.write(json);
}
client.close();
}
catch(Exception ex){
ex.printStackTrace();
}
%>
</body>
</html>
添加了所有依赖项，这是我的 Eclipse 快照
但是，一旦我在 Eclipse 上启动我的 tomcat，我会立即收到以下错误
org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/elasticsearch/common/logging/Loggers
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:462)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/elasticsearch/common/logging/Loggers
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:916)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:845)
org.apache.jsp.elasticsearch_jsp._jspService(elasticsearch_jsp.java:140)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
jar中没有Loggers类（6.2.4版本）
但是，一旦我刷新页面，我就会收到以下错误
org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.common.ParseField
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:462)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
javax.servlet.ServletException: java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.common.ParseField
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:916)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:845)
org.apache.jsp.elasticsearch_jsp._jspService(elasticsearch_jsp.java:140)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
我已经能够在扩展包中找到 ParseField 类。但是应用程序失败并出现 No class found 错误
谁能告诉我我在这里犯了什么错误？另外，谁能指出我使用 RestHighlevelclient 并包含所有依赖项（jar）的完整示例项目？
感谢任何帮助。
【问题讨论】：
标签： elasticsearch