tw.com.javaworld.CH16.AddSimpleTag (Java2HTML)

| AddSimpleTag.java |

    1 package tw.com.javaworld.CH16;
    2
    3 import java.io.*;
    4 import javax.servlet.jsp.*;
    5 import javax.servlet.jsp.tagext.*;
    6
    7 public class AddSimpleTag extends SimpleTagSupport {
    8
    9     private int num1 = 0;
    10    private int num2 = 0;
    11
    12    public void setNum1(int num1) {
    13        this.num1 = num1;
    14    }
    15
    16    public void setNum2(int num2) {
    17        this.num2 = num2;
    18    }
    19
    20    public void doTag() throws JspException, IOException {
    21
    22        JspContext ctx = getJspContext();
    23        JspWriter out = ctx.getOut();
    24
    25        int sum = num1 + num2;
    26        ctx.setAttribute("sum", Integer.toString(sum));
    27
    28        out.println(num1 + " + " + num2 + " = " + sum);
    29    }
    30}