Question

当我尝试使用值a4j:commandButton为<<命名时像那样

<a4j:commandButton id="myButton" 
    value="<<"
    render="myGrid"
    styleClass="style_btn"
    disabled="false" />

发生错误

我的调试跟踪

Error Traced[line: 88] The value of attribute "value" associated with an element type "null" must not contain the '<' character.] with root cause
javax.faces.view.facelets.FaceletException: Error Parsing /screens/s1.xhtml: Error Traced[line: 88] The value of attribute "value" associated with an element type "null" must not contain the '<' character.
    at com.sun.faces.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:390)
    at com.sun.faces.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:364)

Answer 1

使用XML/HTML entities在XML文件中插入<或>：

value="&lt;&lt;"

我该如何使用'＆lt;'在组件的value属性中

1 个答案: