1

我正在关注“Struts 2 in Action”一书，在该书的第一章下，有一个要开发的示例基本应用程序。我试图跟随它，但动作类没有正确调用。但是我可以查看成功结果JSP页面。当我使用调试模式并尝试调试动作类的执行方法时，它没有调用。我正在使用struts-2.3.15.1库来开发这个应用程序。

我的动作类如下：

package manning.chapterTwo;

import org.apache.struts2.config.Result;

import com.opensymphony.xwork2.ActionSupport;



@Result(name="SUCCESS", value="/chapterTwo/HelloWorld.jsp" )
public class AnnotatedHelloWorldAction extends ActionSupport{


private static final long serialVersionUID = 1L;

private static final String GREETING = "Hello ";


public String execute()  {

    setCustomGreeting( GREETING + getName() );

    return "SUCCESS";
}

private String name;


public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

private String customGreeting;

public String getCustomGreeting()
{
    return customGreeting;
}

public void setCustomGreeting( String customGreeting ){
    this.customGreeting = customGreeting;
}
}

获取输入的 JSP 页面如下所示（NameCollector.jsp）：

<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>

<head>
<title>Name Collector</title>
</head>

<body>
    <hr>
    <h4>Enter your name so that we can customize a greeting just for you!</h4>  
    <s:form action="annotatedHelloWorld">
    <s:textfield name="name" label="Your name"/>
    <s:submit/>
    </s:form>
    <hr>
</body>

    </html>

输出 JSP：

<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>HelloWorld</title>
</head>

<body>

  <hr>
    <h3>Custom Greeting Page</h3>      
    <h4><s:property value="customGreeting"/></h4>
  <hr>
</body>
   </html>

web.xml文件 ：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>Struts2HelloWorldXML</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>

  <filter>
    <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    <init-param>
    <param-name>actionPackages</param-name>
    <param-value>manning</param-value>
    </init-param>
   </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

如何解决？

4

1 回答 1

0

您应该在动作类或方法中添加动作注释

@ParentPackage("chapterTwo");
@Action(value="HelloWorld", results=@Result(name="SUCCESS", value="/chapterTwo/HelloWorld.jsp" ))
public class AnnotatedHelloWorldAction extends ActionSupport {

假设作者使用约定来映射您的操作或在勘误表中添加操作注释。还添加了动作所属的父包注解。并且不要忘记将添加到库集中，因为在示例中它被遗漏了。

于 2013-08-23T08:36:46.067 回答