自定义标签的使用 明天

一、配置：
<?xml version="1.0" encoding="gb2312"?>
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN" "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
<tlib-version>1.0</tlib-version>
<jsp-version>1.2</jsp-version>
<short-name>Short-Name</short-name>

<tag>
<name>printTag</name>
<tag-class>util.PrintTag</tag-class>
<body-content>jsp</body-content>

<attribute>
<name>content</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>

<tag>
......
</tag>
</taglib>

二、处理程序：
package util;
import java.io.IOException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import org.apache.commons.logging.Log;
import common.web.GenericTag;

public class PrintTag extends GenericTag {

private static final long serialVersionUID = 1L;
private String content;

public String getContent() {
return content;
}

public void setContent(String content) {
this.content = content;
}

@Override
public int doAfterBody() throws JspException {
return 0;
}

@Override
public int doEndTag() throws JspException {
return 0;
}

@Override
public int doStartTag() throws JspException {
JspWriter out = pageContext.getOut();
try {
out.write(content);
} catch (IOException e) {
e.printStackTrace();
}
return 0;
}

@Override
public Log getLog() {
return null;
}

}

三、配置web.xml

<jsp-config>

    <taglib>

        <taglib-uri>/mytaglib</taglib-uri>

        <taglib-location>/WEB-INF/mytaglib.tld</taglib-location>

    </taglib>

  </jsp-config>

四、导入使用
<%@ taglib prefix="arts" uri="/arts.tld" %> 导入
<arts:printTag content="测试测试"></arts:printTag> 标签使用