index.jsp
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<body>
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<a href="login2.do">登陆(struts标签)</a><br>
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</body>
struts-config.xml
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<action path="/login2"
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forward="/login_use_struts_tag.jsp"
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></action>
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<action path="/loginusetag"
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type="com.tangjian.action.LoginAction"
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name="loginForm"
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>
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<forward name="success" path="/login_success.jsp"/>
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<forward name="error" path="/login_use_struts_tag.jsp"/>
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</action>
login_use_struts_tag.jsp
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<body>
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<h1>用户登陆-使用struts标签保持数据</h1>
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<hr>
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<form action="loginusetag.do" method="post">
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用户名：<html:text property="username"/><br>
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密 码：<html:password property="password" value=""/><br>
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<input type="submit" value="提交">
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</form>
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</body>
运行之后，报了如下错误：
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严重: Servlet.service() for servlet jsp threw exception
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javax.servlet.jsp.JspException: Cannot find bean: "org.apache.struts.taglib.html.BEAN" in any scope
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at org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:935)
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at org.apache.struts.taglib.html.BaseFieldTag.prepareValue(BaseFieldTag.java:121)
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at org.apache.struts.taglib.html.BaseFieldTag.renderInputElement(BaseFieldTag.java:102)
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at org.apache.struts.taglib.html.BaseFieldTag.doStartTag(BaseFieldTag.java:81)
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at org.apache.jsp.login_005fuse_005fstruts_005ftag_jsp._jspx_meth_html_005ftext_005f0(login_005fuse_005fstruts_005ftag_jsp.java:100)
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at org.apache.jsp.login_005fuse_005fstruts_005ftag_jsp._jspService(login_005fuse_005fstruts_005ftag_jsp.java:68)
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at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
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at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
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at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
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at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
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at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
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at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
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at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
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at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
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at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
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at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461)
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at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:399)
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at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
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at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
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at org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(RequestProcessor.java:1023)
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at org.apache.struts.action.RequestProcessor.processForward(RequestProcessor.java:572)
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at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:221)
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at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
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at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
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at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
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at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
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at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
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at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
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at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
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at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
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at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
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at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
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at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
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at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
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at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:873)
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at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
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at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
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at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
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at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
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at java.lang.Thread.run(Thread.java:619)
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2010-1-11 0:17:22 org.apache.catalina.core.StandardWrapperValve invoke
一开始报错后，总感觉没错。
到最后把使用的标签全部换成struts的运行了下才好了。也就是把form标签也改成struts的标签。
更改的login_use_struts_tag.jsp
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<body>
-
<h1>用户登陆-使用struts标签保持数据</h1>
-
<hr>
-
<html:form action="loginusetag.do" method="post">
-
用户名：<html:text property="username"/><br>
-
密 码：<html:password property="password" value=""/><br>
-
<input type="submit" value="提交">
-
</html:form>
-
</body>
为什么html标签和struts的标签不能混用的原因没有去深究，只是给自己提个醒：以后页面尽量不要使用不同风格的标签，这样感觉应该不会错吧！
原文出自：http://tj-dragon.iteye.com/blog/567159
java org.apache.struts.taglib.html.BEAN 没有找到
原文：http://www.cnblogs.com/sunxun/p/4445047.html
