jstl <c:foreach>标签进行数据遍历

<%--
<c:forEach ></c:forEach>标签
items="${xx}"  ：需要被遍历的变量
var ="xx" 这里是本次遍历出来的临时变量
需要用${xx}显示
--%>
<c:forEach items="${HanBlog_Classes}" var="key">
<tr>
<td>${key.id}</td>
<td>${key.name }</td>
<td>${key.introduction }</td>
<td><button dataid="${key.id }"
class="btn btn-primary btn-xs hanblog_edit">修改</button>  
<button dataid="${key.id }"
class="btn btn-primary btn-danger btn-xs hanblog_delete">删除</button></td>
</tr>
</c:forEach>

如果出现下面问题：则是因为 {使用错误。

HTTP Status 500 - /WEB-INF/jsp/Home/House/ClassManager.jsp (line: 59, column: 48) equal symbol expected

type Exception report

message /WEB-INF/jsp/Home/House/ClassManager.jsp (line: 59, column: 48) equal symbol expected

description The server encountered an internal error that prevented it from fulfilling this request.

exception
org.apache.jasper.JasperException: /WEB-INF/jsp/Home/House/ClassManager.jsp (line: 59, column: 48) equal symbol expected
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:41)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:275)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:91)
org.apache.jasper.compiler.Parser.parseAttribute(Parser.java:220)
org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:163)
org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:154)
org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1241)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1460)
org.apache.jasper.compiler.Parser.parse(Parser.java:139)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:227)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:100)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:199)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:356)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:336)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:323)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:585)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:363)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1246)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1029)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:973)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

note The full stack trace of the root cause is available in the Apache Tomcat/8.0.33 logs.

Apache Tomcat/8.0.33