java.lang.NoClassDefFoundError: org/apache/commons/discovery/tools/DiscoverSingleton
我已经使用 jsf 在 jsp 文件中创建了一个注册表单，并尝试将其与 Web 服务连接，以便将元素传递到数据库。
当我按下提交按钮时，出现错误。我不认为问题涉及连接代码，但我不确定。
有人能告诉我一些可能以某种方式帮助我的事情吗？
错误：
javax.servlet.ServletException: #{formabean.submitdetails}: java.lang.NoClassDefFoundError: org/apache/commons/discovery/tools/DiscoverSingleton
javax.faces.webapp.FacesServlet.service(FacesServlet.java:256)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
我的表单 jsp：
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<f:view>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>Form</title>
</head>
<body>
<div align="right" >
<p>
<br>.............
<h:commandButton value="submit" type="submit"
action="#{formabean.submitdetails}" />
</h:form>
</body>
</html>
</f:view>
我的 Bean 类“formavar”：
package org.forma;
import org.imigrant.Migration.MigrationResult;
import org.imigrant.Migration.MigrationWS_PortType;
import org.imigrant.Migration.MigrationWS_Service;
import org.imigrant.Migration.MigrationWS_ServiceLocator;
/** libraries for Web Service*/
/**
*
* @author USER
*/
public class formavar {
private String name;
private String lastname;.....
public String getName() {
return name;
}
/**
* @param name the name to set
*/
public void setName(String name) {
this.name = name;
}
/**
* @return the surname
*/
public String getLastname() {
return lastname;
}
/**
* @param surname the surname to set
*/
public void setLastname(String lastname) {
this.lastname = lastname;
}......
public String submitdetails() {
String migrationURL = "http://localhost:8080/mule-tomcat/ESB/Migration?wsdl";
MigrationResult registrationResult = new MigrationResult();
try {
MigrationWS_Service service = new MigrationWS_ServiceLocator(migrationURL);
MigrationWS_PortType port = service.getMigrationImplPort();
registrationResult = port.registerDoc(
null,
this.granting,
this.expire_date,
this.name,
this.lastname,.............
);
return "OK";
} catch (Exception ex) {
return "ERROR "+ex.getMessage();
}
//return "OK";
}
}
和配置 xml：
<managed-bean>
<managed-bean-name>formabean</managed-bean-name>
<managed-bean-class>org.forma.formavar</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
I have create a registration form in jsp file with jsf and I try to connect it with a web service in order to pass through this the elements to a database.
When I press submit button I get an error. I don't think that the problem concerns the connection code but I'm not sure.
Can anybody tell me something that maybe helps me in some way?
error:
javax.servlet.ServletException: #{formabean.submitdetails}: java.lang.NoClassDefFoundError: org/apache/commons/discovery/tools/DiscoverSingleton
javax.faces.webapp.FacesServlet.service(FacesServlet.java:256)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
my form jsp:
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<f:view>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>Form</title>
</head>
<body>
<div align="right" >
<p>
<br>.............
<h:commandButton value="submit" type="submit"
action="#{formabean.submitdetails}" />
</h:form>
</body>
</html>
</f:view>
my Bean class "formavar":
package org.forma;
import org.imigrant.Migration.MigrationResult;
import org.imigrant.Migration.MigrationWS_PortType;
import org.imigrant.Migration.MigrationWS_Service;
import org.imigrant.Migration.MigrationWS_ServiceLocator;
/** libraries for Web Service*/
/**
*
* @author USER
*/
public class formavar {
private String name;
private String lastname;.....
public String getName() {
return name;
}
/**
* @param name the name to set
*/
public void setName(String name) {
this.name = name;
}
/**
* @return the surname
*/
public String getLastname() {
return lastname;
}
/**
* @param surname the surname to set
*/
public void setLastname(String lastname) {
this.lastname = lastname;
}......
public String submitdetails() {
String migrationURL = "http://localhost:8080/mule-tomcat/ESB/Migration?wsdl";
MigrationResult registrationResult = new MigrationResult();
try {
MigrationWS_Service service = new MigrationWS_ServiceLocator(migrationURL);
MigrationWS_PortType port = service.getMigrationImplPort();
registrationResult = port.registerDoc(
null,
this.granting,
this.expire_date,
this.name,
this.lastname,.............
);
return "OK";
} catch (Exception ex) {
return "ERROR "+ex.getMessage();
}
//return "OK";
}
}
and the config xml:
<managed-bean>
<managed-bean-name>formabean</managed-bean-name>
<managed-bean-class>org.forma.formavar</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
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这仅意味着 web 应用程序的运行时类路径中缺少提到的类（或包含该类的 JAR 文件）。
正如包名称所暗示的，该类是 Apache Commons Discovery 的一部分，可以从 http://commons.apache 下载.org/discovery。如果您只是将其 JAR 文件放入 Web 应用程序的
/WEB-INF/lib中（由 Web 应用程序的运行时类路径覆盖），则此错误应该会消失。请注意，这个问题与 JSF/JSP 没有任何关系，更不用说 Java EE 了。这只是基本的Java。异常的根本原因也暗示；它属于
java.lang包。This just means that the mentioned class (or a JAR file containing the class) is missing in the webapp's runtime classpath.
As the package name hints, the class is part of Apache Commons Discovery which is available for download at http://commons.apache.org/discovery. If you just drop its JAR file(s) in
/WEB-INF/libof your webapp (which is covered by webapp's runtime classpath), then this error should disappear.Note that this problem has nothing to do with JSF/JSP, let alone Java EE. It's just basic Java. The root cause of the exception also hints that; it's of the
java.langpackage.执行测试时项目类路径中缺少指定的类。
解决方案是将以下依赖项添加到您的 pom 中：
The specified classes are missing from the project classpath at the time of execution of the test.
The solution is to add the following dependency to your pom: