JSF + tomacat + MyEclipse + hibernate javax.faces.el.EvaluationException: java.

Question

严重: java.lang.NumberFormatException: null
javax.faces.el.EvaluationException: java.lang.NumberFormatException: null
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:97)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
at javax.faces.component.UICommand.broadcast(UICommand.java:383)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:447)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.stuman.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:33)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at com.stuman.web.jsf.bean.LoginBean.login(LoginBean.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.el.parser.AstValue.invoke(AstValue.java:191)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
at org.apache.jasper.el.JspMethodExpression.invoke(JspMethodExpression.java:68)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
... 23 more
2010-3-30 14:08:01 com.sun.faces.lifecycle.InvokeApplicationPhase execute
警告: #{loginBean.login}: java.lang.NumberFormatException: null
javax.faces.FacesException: #{loginBean.login}: java.lang.NumberFormatException: null
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:107)
at javax.faces.component.UICommand.broadcast(UICommand.java:383)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:447)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.stuman.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:33)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.faces.el.EvaluationException: java.lang.NumberFormatException: null
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:97)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
... 22 more
请问下这是什么原因造成的！

Answer 1

很简单 at com.stuman.util.SetCharacterEncodingFilter 33行 或它调用的代码 对一个null做了数字转换 也就是你要转换成数字的对象是空的null值

Answer 2

#{loginBean.login}: java.lang.NumberFormatException: null 这里也注意下 是不是你的login 或者你的loginBean是空

Answer 3

严重: java.lang.NumberFormatException: null
javax.faces.el.EvaluationException: java.lang.NumberFormatException: null
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:97)你要么自己翻译一下
要么就翻译一下的
你在对数字进行转换格式的时候出现了null
你能对null进行数字格式转换么有空多翻译下给出的提示信息
不要什么都拿来问自己先看看
review一下的嘛

Answer 4

public class SetCharacterEncodingFilter implements Filter {
protected String encoding = null;
protected FilterConfig filterConfig = null;
protected boolean ignore = true;

public void destroy() {
encoding = null;
filterConfig = null;
}

//选择设置使用的字符编码
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
//选择使用的字符编码
if(ignore = true && request.getCharacterEncoding() == null){
String encoding = selectEncoding(request);
if(encoding != null){
request.setCharacterEncoding(encoding);
}
}
//将控制权交给下一个Filter
chain.doFilter(request, response);
}


public void init(FilterConfig filterConfig) throws ServletException {
this.encoding = filterConfig.getInitParameter("encoding");
String value = filterConfig.getInitParameter("ignore");
if(value == null){
this.ignore = true;
}else if(value.equalsIgnoreCase("true")){
this.ignore = true;
}else if(value.equalsIgnoreCase("yes")){
this.ignore = true;
}else{
this.ignore = false;
}
}

protected String selectEncoding(ServletRequest request){
return this.encoding;
}
就是在这个类里的问题，请问是哪里出了问题，33行是chain.doFilter(request, response);

Answer 5

if(ignore = true && request.getCharacterEncoding() == null)
这儿应该是
if(ignore == true && request.getCharacterEncoding() == null)
低级错误！