jsp页面调用applet实现人民币的大小写转换
2003-04-18 16:28:09 来源：WEB开发网实现方法一
applet实现页面是rmb.jsp，此页面是通过applet来实现人民币小写转换成大写的。此页面有三个变量需要在载入classes的时候进行初始化：
<applet type="applet" id="myApplet" codebase = "." name="TestApplet"
align="middle" code="lqh.rmb.Applicate.Rmb.class"
width="560" height="25">
<param name="RGB_Back" value="241|247|251">
<param name="RGB_Fore" value="255|0|0"/>
<param name="WIGTH" value="560"/>
</applet>
变量RGB_Back是初始化背景色的，修改次变量可以使applet的背景色跟自己页面的风格一样；变量RGB_Fore是初始化字体的颜色; WIGTH要和applet的宽度一样，这个变量是保证显示的转换信息在中间显示。
此种方法不能传递值给页面trans.jsp，只能显示并且不能copy。
页面代码如下：
<html>
<head>人民币小写转换成大写</head>
<%@ page contenttype="text/html;charset=gb2312" %>
<SCRipT language=javaScript>
function trans(){
//取变量的值
var aaa=document.rmb. rmb_test.value;
//给applet赋变量的值
document.myApplet.setRMB(aaa);
document.myApplet.repaint();
return true;
}
</SCRIPT>
<body>
<form name="rmb">
输入金额：<input type=”text” name=”rmb_test” onkeyup=”trans()”><br><hr>
<%@ include file="../rmb.jsp" %>
</form>
</body>
</html>
实现方法二
applet实现页面是rmb.jsp，此页面是通过applet来实现人民币小写转换成大写的。此页面不需要变量进行初始化，在页面上不显示applet画的图像;而可以把转换的值传递给页面变量：
<applet type="applet" id="myApplet" codebase = "." name="TestApplet"
align="middle" code="lqh.rmb.Applicate.Rmb.class"
width="0" height="0">
</applet>
页面trans.jsp代码如下：
<html>
<head>人民币小写转换成大写</head>
<%@ page contenttype="text/html;charset=gb2312" %>
<%@ include file="../rmb.jsp" %>
<SCRIPT language=Javascript>
function trans(){
var aaa=document.rmb. rmb_test.value;
//得到转换的值
var rmb = document.myApplet.getRMB(aaa);
document.rmb. rmb_result.value = rmb;
return true;
}
</SCRIPT>
<body>
<form name="rmb">
输入金额：<input type=”text” name=”rmb_test” onkeyup=”trans()”><br>
转换结果：<input type=”text” name=”rmb_result” ><br>
</form>
</body>
</html>
附录
1．applet代码：
package lqh.rmb.Applicate;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import lqh.rmb.*;
public class Rmb extends Applet {
PRivate boolean isStandalone = false;
private RMBConversion rmb=new RMBConversion();
private String var0 = "";
private String re_rmb="";
private String wigth ="0";
private String back_color;
private String fore_color;
public String getParameter(String key, String def) {
return isStandalone ? System.getProperty(key, def) :
(getParameter(key) != null ? getParameter(key) : def);
}
public void paint(Graphics g) {
if(wigth.equals("0")){
wigth = "560";
}
int i= Integer.parseInt(wigth);
if(checkNum(var0)){
if(var0.endsWith(".")){
var0 = var0.substring(0,var0.length()-1);
}
re_rmb= rmb.RMB(var0);
}else{
re_rmb="输入错误："+var0;
}
int middel =(i - re_rmb.length()*12)/2;
this.setBackground(new Color(getColor(back_color)[0], getColor(back_color)[1], getColor(back_color)[2]));
this.setForeground(new Color(getColor(fore_color)[0], getColor(fore_color)[1], getColor(fore_color)[2]));
g.drawString(re_rmb,middel,20);
}
public void init() {
try {
back_color = this.getParameter("RGB_Back", "241|247|251");
}catch(Exception e) {e.printStackTrace();}
try {
fore_color = this.getParameter("RGB_Fore", "255|0|0");
}catch(Exception e) {e.printStackTrace();}
try {
wigth = this.getParameter("WIGTH", "0");
}catch(Exception e) {e.printStackTrace();}
try {
jbInit();
}catch(Exception e) { e.printStackTrace(); }
}
private void jbInit() throws Exception {
this.setBackground(new Color(getColor(back_color)[0], getColor(back_color)[1], getColor(back_color)[2]));
}
public void setRMB(String rmb_temp){
var0 = rmb_temp;
}
public String getRMB(String rmb_temp){
if(checkNum(rmb_temp)){
if(rmb_temp.endsWith(".")){
rmb_temp = rmb_temp.substring(0,rmb_temp.length()-1);
}
re_rmb= rmb.RMB(rmb_temp);
}else{
re_rmb="输入错误："+rmb_temp;
}
return re_rmb;
}
public boolean checkNum(String str){
String numChar="0123456789.";
boolean breakBoolean = false;
for(int i=0;i<str.length();i++){
if(numChar.indexOf(str.substring(i,i+1))<0){
breakBoolean =true;
}
if(breakBoolean) break;
}
if(breakBoolean){
return false;
}else{
if(str.startsWith(".")){
return false;
}else{
return true;
}
}
}
public String[][] getParameterInfo() {
String[][] pinfo =
{
{"RGB_Back", "String", ""},
{"RGB_Fore", "String", ""},
{"WIGTH", "String", ""},
};
return pinfo;
}
private int[] getColor(String rgb){
int[] rgb_return = new int[3];
int index =0,nextIndex=0,len=0;
while((index =rgb.indexOf("|",nextIndex))>-1){
rgb_return[len]=getInt(rgb.substring(nextIndex,index));
nextIndex=index+1;
len++;
}
rgb_return[len]=getInt(rgb.substring(nextIndex));
return rgb_return;
}
private int getInt(String str){
try{
return Integer.parseInt(str);
}catch(Exception e){
return 0;
}
}
}
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