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;istr.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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