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struts2 依赖注入boolean类型的属性时报错

發布時間：2024/4/13 编程问答 29 豆豆

生活随笔收集整理的這篇文章主要介紹了 struts2 依赖注入boolean类型的属性时报错小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

使用IDE：eclipse；

struts2的版本：2.3.4.1

登錄界面代碼如下：

Html代碼??

<?xml?version="1.0"?encoding="UTF-8"??>??

<%@?page?language="java"?contentType="text/html;?charset=UTF-8"??

????pageEncoding="UTF-8"%>??

<%??

String?path?=?request.getContextPath();??

String?basePath?=?request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";??

%>??

<%@?taglib?prefix="s"?uri="/struts-tags"%>??

<!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>??

<title>login</title>??

</head>??

<body>??

<center>??

<h1>login?platform</h1>??

<s:form?action="/login"?method="post"?>??

????<table>??

????<tr><td>username:</td>?<td><s:textfield?name="user.username"??></s:textfield>?</td></tr>??

????<tr><td>password:</td>?<td><s:textfield?name="user.password"??></s:textfield>?</td></tr>??

????<tr><td>age:</td>?<td><s:textfield?name="user.age"??></s:textfield>?</td></tr>??

????<tr><td>isBoy:</td>?<td><s:textfield?name="user.isBoy"??></s:textfield>?</td></tr>??

????<tr>?<td?colspan="2"><s:submit?value="login"?></s:submit>?</td></tr>??

??????

????</table>??

????</s:form>??

</center>??

</body>??

</html>??

對應的bean中有一個成員變量是：private boolean?isBoy;（是boolean 類型的）

Java代碼??

package?com.jn.bean;??

public?class?LoginUser?{??

????private?int?age;??

????private?String?username;??

????private?String?password;??

????/***?

?????*?是否是男性?

?????*/??

????private?boolean?isBoy;??

????public?LoginUser()?{??

????????super();??

????}??

????public?int?getAge()?{??

????????return?age;??

????}??

????public?void?setAge(int?age)?{??

????????this.age?=?age;??

????}??

????public?String?getUsername()?{??

????????return?username;??

????}??

????public?void?setUsername(String?username)?{??

????????this.username?=?username;??

????}??

????public?String?getPassword()?{??

????????return?password;??

????}??

????public?void?setPassword(String?password)?{??

????????this.password?=?password;??

????}??

????public?boolean?isBoy()?{??

????????return?isBoy;??

????}??

????public?void?setBoy(boolean?isBoy)?{??

????????this.isBoy?=?isBoy;??

????}??

}??

?其中的getter，setter方法都是使用eclipse自動生成的。

對應的action為：

Java代碼??

package?com.jn.action;??

import?com.jn.bean.LoginUser;??

import?com.opensymphony.xwork2.ActionSupport;??

public?class?LoginVerifyAction?extends?ActionSupport?{??

????private?static?final?long?serialVersionUID?=?-5532496750392156543L;??

????private?LoginUser?user;??

????@Override??

????public?String?execute()?throws?Exception?{??

????????System.out.println("user?information:");??

????????System.out.println("username:"+user.getUsername());??

????????System.out.println("password:"+user.getPassword());??

????????System.out.println("age:"+user.getAge());??

????????System.out.println("isBoy:"+user.isBoy());??

????????return?super.execute();??

????}??

??????

????public?LoginUser?getUser()?{??

????????return?user;??

????}??

????public?void?setUser(LoginUser?user)?{??

????????this.user?=?user;??

????}??

??????

}??

?

?

但是登錄時報錯：

Xml代碼??

警告:?Error?setting?expression?'user.isBoy'?with?value?'[Ljava.lang.String;@863941'??

ognl.NoSuchPropertyException:?com.jn.bean.LoginUser.isBoy?[java.lang.IllegalAccessException:?Class?ognl.OgnlRuntime?can?not?access?a?member?of?class?com.jn.bean.LoginUser?with?modifiers?"private"]??

????at?ognl.OgnlRuntime.setFieldValue(OgnlRuntime.java:1682)??

????at?ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java:87)??

????at?ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java:162)??

????at?com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.setProperty(ObjectAccessor.java:27)??

????at?ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2315)??

????at?ognl.ASTProperty.setValueBody(ASTProperty.java:127)??

????at?ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)??

????at?ognl.SimpleNode.setValue(SimpleNode.java:301)??

????at?ognl.ASTChain.setValueBody(ASTChain.java:227)??

????at?ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)??

????at?ognl.SimpleNode.setValue(SimpleNode.java:301)??

????at?ognl.Ognl.setValue(Ognl.java:737)??

????at?com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:217)??

????at?com.opensymphony.xwork2.ognl.OgnlValueStack.trySetValue(OgnlValueStack.java:186)??

????at?com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:173)??

????at?com.opensymphony.xwork2.ognl.OgnlValueStack.setParameter(OgnlValueStack.java:151)??

????at?com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:317)??

????at?com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:228)??

????at?com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:236)??

????at?com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:90)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)??

????at?com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:192)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)??

????at?com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)??

????at?org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)??

????at?org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:511)??

????at?org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)??

????at?org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)??

????at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)??

????at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)??

????at?org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)??

????at?org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)??

????at?org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)??

????at?org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)??

????at?org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)??

????at?org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)??

????at?org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)??

????at?org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)??

????at?org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)??

????at?org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)??

????at?org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)??

????at?java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)??

????at?java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)??

????at?java.lang.Thread.run(Thread.java:662)??

Caused?by:?java.lang.IllegalAccessException:?Class?ognl.OgnlRuntime?can?not?access?a?member?of?class?com.jn.bean.LoginUser?with?modifiers?"private"??

????at?sun.reflect.Reflection.ensureMemberAccess(Reflection.java:65)??

????at?java.lang.reflect.Field.doSecurityCheck(Field.java:960)??

????at?java.lang.reflect.Field.getFieldAccessor(Field.java:896)??

????at?java.lang.reflect.Field.set(Field.java:657)??

????at?ognl.OgnlRuntime.setFieldValue(OgnlRuntime.java:1674)??

????...?67?more??

/--?Encapsulated?exception?------------\??

java.lang.IllegalAccessException:?Class?ognl.OgnlRuntime?can?not?access?a?member?of?class?com.jn.bean.LoginUser?with?modifiers?"private"??