Question

请教java高手，jsp表单提交了，但是进入不了提交的方法断点

function delete_onclick(idValue){
document.all.creditRankInfoId.value = idValue;
document.forms("creditItemsForm").actions.value= "deleteCreditRankInfo";
document.forms("creditItemsForm").submit();
alert(111);
}
已经弹出111了，但是没进入我的deleteCreditRankInfo方法，struts的配置文件里面检查了下，方法名没错。看了下tomcat的日志，得到如下的异常报告

2011-01-26 17:53:57 StandardWrapperValve[struts1]: Servlet.service() for servlet struts1 threw exception
java.lang.NullPointerException
at org.apache.commons.beanutils.PropertyUtilsBean.getIndexedProperty(PropertyUtilsBean.java:427)
at org.apache.commons.beanutils.PropertyUtilsBean.getIndexedProperty(PropertyUtilsBean.java:340)
at org.apache.commons.beanutils.PropertyUtilsBean.getNestedProperty(PropertyUtilsBean.java:684)
at org.apache.commons.beanutils.PropertyUtilsBean.getProperty(PropertyUtilsBean.java:715)
at org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:884)
at org.apache.commons.beanutils.BeanUtilsBean.populate(BeanUtilsBean.java:811)
at org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:298)
at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:493)
at org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:816)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.ajaxanywhere.AAFilter.doFilter(AAFilter.java:46)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at com.lenovo.platform.security.acegi.MyAuthenticationProcessingFilter.doFilter

另外我跟断点到我的MyAuthenticationProcessingFilter类里面的doFilter方法，得到异常javax.servlet.ServletException: BeanUtils.populate
rootCause是
java.lang.NullPointerException
如果我把按钮提交的方法改为超链接
window.location.href = "<%=servletName%>/creditItems.do?actions=deleteCreditRankInfo&creditRankInfoId="+idValue;
这样是会提交并进入方法的断点，虽然可以解决问题，但是我另外有一个保存的方法也是这样，保存方法的数据很多，不可能用参数传递过去，很纠结

Answer 1

是你的取值有问题。
取值尽量不要用document.all***document.forms**之类的。
尽量用document.getElementById("..").value方法。
因为id是不可以重复的。name是可以重复的。

还有你如果取Form表单的话。你可以给form一个name值。比如thisForm
然后document.thisForm.action = "deleteCreditRankInfo";
document.thisForm.submit();

搞定。。

Answer 2

document.forms("creditItemsForm").actions.value= "deleteCreditRankInfo";
document.forms("creditItemsForm").submit();
改为：
document.creditItemsForm.action.value= "deleteCreditRankInfo";
document.creditItemsForm.submit();

Answer 3

改成下面的试试
function delete_onclick(idValue){
document.creditItemsForm.action= "deleteCreditRankInfo.action";
document.creditItemsForm.submit();
alert(111);
}

Answer 4

这个问题一定要提交表单。
1，提交内容多，所以要放在表单里。如果不提交表单，则无法提交后获得表单内容。
2，可以把您的表单外内容缓存入REQUEST,或session （不建议）

Answer 5

菜鸟，也遇到同样问题