jsp页面调用applet实现人民币的大小写转换


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;

//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

1applet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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