footag.java

来自「一个java写的加密算法」· Java 代码 · 共 71 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.util.Hashtable;
import java.io.Writer;
import java.io.IOException;

/**
 * The simplest tag
 */
//  Collect attributes and call into some actions
//  <foo att1="..." att2="...." att3="...." />
public class FooTag 
    extends ExampleTagBase 
    implements BodyTag 
{
    private String atts[] = new String[3];
    int i = 0;
    
    private final void setAtt(int index, String value) {
        atts[index] = value;
    }
    
    public void setAtt1(String value) {
        setAtt(0, value);
    }
    
    public void setAtt2(String value) {
        setAtt(1, value);
    }

    public void setAtt3(String value) {
        setAtt(2, value);
    }
    
    /**
     * Process start tag
     *
     * @return EVAL_BODY_INCLUDE
     */
    public int doStartTag() throws JspException {
	return EVAL_BODY_TAG;
    }

    public void doInitBody() throws JspException {
        pageContext.setAttribute("member", atts[i]);
        i++;
    }
    
    public int doAfterBody() throws JspException {
        try {
            if (i == 3) {
                bodyOut.writeOut(bodyOut.getEnclosingWriter());
                return SKIP_BODY;
            } else
                pageContext.setAttribute("member", atts[i]);
            i++;
            return EVAL_BODY_TAG;
        } catch (IOException ex) {
            throw new JspTagException(ex.toString());
        }
    }
}