自定义标签异常错误汇总

1、未设置empty 属性

• 错误信息：

严重: Servlet.service() for servlet [jsp] in context with path [/web-exercise] threw exception [/paramTag.jsp (line: 11, column: 0) The TLD for the class taglibclass.QueryTag specifies an invalid body-content (JSP) for a SimpleTag.] with root cause
org.apache.jasper.JasperException: /paramTag.jsp (line: 11, column: 0) The TLD for the class taglibclass.QueryTag specifies an invalid body-content (JSP) for a SimpleTag.	

• web页面截图：
  

• tld配置：

<tag>
		<name>paramTag</name>
		<tag-class>taglibclass.QueryTag</tag-class>
		 
		<attribute>
			<name>driver</name>
			<required>true</required>
			<rtexprvalue>true</rtexprvalue>
		</attribute>
		<attribute>
			<name>url</name>
			<required>true</required>
			<rtexprvalue>true</rtexprvalue>
		</attribute>
		<attribute>
			<name>username</name>
			<required>true</required>
			<rtexprvalue>true</rtexprvalue>
		</attribute>
		<attribute>
			<name>password</name>
			<required>true</required>
			<rtexprvalue>true</rtexprvalue>
		</attribute>
		<attribute>
			<name>sql</name>
			<required>true</required>
			<rtexprvalue>true</rtexprvalue>
		</attribute>
	</tag>

• 解决方案：在tld配置文件中增加：<body-content>empty</body-content> 属性