logtag.java

来自「一个java写的加密算法」· Java 代码 · 共 52 行

/*
 * Copyright 2004-2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

package samples.webapps.simple.beans.examples;


import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

import java.io.IOException;

/**
 * Log the contents of the body. Could be used to handle errors etc. 
 */
public class LogTag 
    extends ExampleTagBase
    implements BodyTag 
{
    boolean toBrowser = false;
    
    public void setToBrowser(String value) {
        if (value == null)
            toBrowser = false;
        else if (value.equalsIgnoreCase("true"))
            toBrowser = true;
        else
            toBrowser = false;
    }

    public int doStartTag() throws JspException {
        return EVAL_BODY_TAG;
    }
    
    public int doAfterBody() throws JspException {
        try {
            String s = bodyOut.getString();
            System.err.println(s);
            if (toBrowser)
                bodyOut.writeOut(bodyOut.getEnclosingWriter());
            return SKIP_BODY;
        } catch (IOException ex) {
            throw new JspTagException(ex.toString());
        }
    }
}