?? getrequestparameterhandler.java
字號:
package scwcd.lab12.taglib;
import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.jsp.*;
import javax.servlet.ServletRequest;
import java.io.IOException;
public class GetRequestParameterHandler extends TagSupport {
String name= "";
public void setName(String name) {
this.name = name;
}
public int doStartTag() throws JspException {
ServletRequest request = pageContext.getRequest();
String paramValue = request.getParameter(name);
JspWriter out = pageContext.getOut();
try {
if ( paramValue==null | paramValue.length()==0 ) {
out.print("N/A");
}
out.print(paramValue);
} catch (IOException ioe) {
throw new JspException(ioe);
}
return SKIP_BODY;
}
public int doEndTag() {
return EVAL_PAGE;
}
public void release() {
name = "";
}
}
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