JasperException: /MyELTag.jsp(28,2) Unable to load tag handler class "com.icss.tag.MyTag" for tag ..

- 日理万妓 2022-06-07 07:06 154阅读 0赞

### 报错信息 ###

org.apache.jasper.JasperException: /MyELTag.jsp(28,2) Unable to load tag handler class "com.icss.tag.MyTag" for tag "mtg:student"
        org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
        org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
        org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:198)
        org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1242)
        org.apache.jasper.compiler.Parser.parseElements(Parser.java:1467)
        org.apache.jasper.compiler.Parser.parse(Parser.java:138)
        org.apache.jasper.compiler.ParserController.doParse(ParserController.java:216)
        org.apache.jasper.compiler.ParserController.parse(ParserController.java:103)
        org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:154)
        org.apache.jasper.compiler.Compiler.compile(Compiler.java:315)
        org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
        org.apache.jasper.compiler.Compiler.compile(Compiler.java:282)
        org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

### 报错原因 ###

使用jstl自定义标签时，将写好的标签(java项目)与web项目关联，在jsp页面使用标签时出错，无法为标签加载类，也就是java项目中的写好的标签类。

### 解决方法 ###

在Deployment Assembly进行项目装配部署

![这里写图片描述][SouthEast]

![这里写图片描述][SouthEast 1]

![这里写图片描述][SouthEast 2]

*更多部署配置操作详见：*[http://www.myeclipsecn.com/learningcenter/myeclipse-basics/myeclipse-deployment-assembly/][http_www.myeclipsecn.com_learningcenter_myeclipse-basics_myeclipse-deployment-assembly]

[SouthEast]: /images/20220607/fee6e70601ac4f73bff46dfa38ab99ea.png
[SouthEast 1]: /images/20220607/c4b119acd97343a6853a2375ab0edd8a.png
[SouthEast 2]: /images/20220607/4e2102cc794946b39d5b15b52b7a01f7.png
[http_www.myeclipsecn.com_learningcenter_myeclipse-basics_myeclipse-deployment-assembly]: http://www.myeclipsecn.com/learningcenter/myeclipse-basics/myeclipse-deployment-assembly/