金额转换程序 - 黑马程序员技术交流社区

private char[] zhDigital =new char[]{'零','壹','贰','叁','肆','伍','陆','柒','捌','玖'}; //用数组进行数字匹配
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
str = new StringBuffer();
if (check()) {
String num = new StringBuffer(removeZero(textField.getText())).reverse().toString();
String bin = transformNum(num);
textField_1.setText(bin);
}
}
private boolean check() {
if (textField.getText().equals("")) {
Toolkit.getDefaultToolkit().beep();
JOptionPane.showMessageDialog(getContentPane(), "字符不能为空", "", JOptionPane.WARNING_MESSAGE);
return false;
}
final String Digits = "(\\p{Digit}+)";
final String fpRegex = ("[\\x00-\\x20]*(" + Digits+ "(\\.)?"+ "\\p{Digit}{1,2}" +")|" + Digits + "[\\x00-\\x20]*");
if (!Pattern.matches(fpRegex, textField.getText())) {
Toolkit.getDefaultToolkit().beep();
JOptionPane.showMessageDialog(getContentPane(), "不能含有非数字字符\n且输入数字不低于分", "", JOptionPane.WARNING_MESSAGE);
return false;
}
return true;
}
//符合要求的数字进行转换
private String transformNum(String num) {
int dot = num.indexOf(".");
if (num.equals("0")) {
str.append('零');
str.append('圆');
return str.toString();
}
if (dot == -1) {
str.append('整');
str.append('圆');
zhDigital(num);
}else {
String dotBefore = num.substring(0, dot);
String dotAfter = num.substring(dot+1);
if (removeZero(dotAfter).equals("0") && removeZero(dotBefore).equals("0")) {
str.append('零');
str.append('圆');
return str.toString();
}
boolean addYuan = false;
for (int weiShu = 0;weiShu < dotBefore.length();weiShu++) {
int numTem = Integer.parseInt(String.valueOf(dotBefore.charAt(weiShu)));
if (dotBefore.length() == 2) {
if (weiShu == 0 && numTem != 0) {
str.append('分');
}
if (weiShu == 1 && numTem != 0) {
str.append('角');
}
}else {
if (numTem != 0) {
str.append('角');
}
}
if (numTem != 0) {
addYuan = true;
str.append(zhDigital[numTem]);
}
}
if (!removeZero(dotAfter).equals("0")) {
if (!addYuan) {
str.append('整');
}
str.append('圆');
if (!zhDigital(dotAfter)) {
return null;
}
}
}
return str.reverse().toString();
}
//判断在数字前面是否加上单位
private void zhUnit(int weiShu,int num) {
if ((weiShu == 1 || weiShu == 5 || weiShu == 9) && num != 0) {
str.append('拾');
}else if ((weiShu == 2 || weiShu == 6 || weiShu == 10) && num != 0) {
str.append('佰');
}else if ((weiShu == 3 || weiShu == 7 || weiShu == 11) && num != 0) {
str.append('仟');
}
if (weiShu == 4) {
str.append('万');
}
if (weiShu == 8) {
str.append('亿');
}
}
//将数字进行转换的判断方法
private boolean zhDigital(String num) {
int numTem;
boolean gWeiShu = false;
boolean wWeiShu = false;
boolean yWeishu = false;
boolean addWanWei = false;
if (num.length() >12) {
Toolkit.getDefaultToolkit().beep();
JOptionPane.showMessageDialog(getContentPane(), "数字过大，\n无法完成转换！！", "", JOptionPane.WARNING_MESSAGE);
return false;
}
for (int weiShu = 0;weiShu < num.length();weiShu++) {
numTem = Integer.parseInt(String.valueOf(num.charAt(weiShu)));
zhUnit(weiShu,numTem);
if (weiShu<4) {
if (numTem != 0 || gWeiShu || num.length() == 1) {
gWeiShu = true;
str.append(zhDigital[numTem]);
}
if (numTem == 0) {
gWeiShu = false;
}
}else if (weiShu >= 4 && weiShu < 8) {
if (numTem != 0 || wWeiShu) {
addWanWei = true;
wWeiShu = true;
str.append(zhDigital[numTem]);
}
if (numTem == 0) {
wWeiShu = false;
}
}else {
if (!addWanWei) {
str = str.deleteCharAt(str.lastIndexOf("万"));
addWanWei = true;
}
if (numTem != 0 || yWeishu) {
yWeishu = true;
str.append(zhDigital[numTem]);
}
if (numTem == 0) {
yWeishu = false;
}
}
}
return true;
}
private String removeZero(String num) {
int beginIndex = 0;
boolean index = false;
for (int i = 0;i < num.length();i++) {
if (num.charAt(i) == '0') {
beginIndex = i+1;
}else {
index = true;
break;
}
}
if (index) {
return num.substring(beginIndex);
}
return "0";
}
});

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public static void main(String[] args) {
System.out.println("请输入要转换的金额，1-12位数字，ENTER确认");//友好提示
Scanner scanner = new Scanner(System.in);
String inputNum = scanner.next();
//简单判断
if(inputNum.length()>12){
System.out.println("土豪，我们做朋友好不好？");
}else{
System.out.println(mainMethod(inputNum));
}
}
private static String mainMethod(String s){
//定义单位数组
String[]units={"亿","万","圆整"};
String result="";
//在字符串前面补零，使字符串长度为4的倍数
int length=s.length()%4;
if(length==1){
s="000"+s;
}else if(length==2){
s="00"+s;
}else if(length==3){
s="0"+s;
}
//转成数组
char[]ch=s.toCharArray();
//获得数组长度除以4的结果，从而决定有几个子数组和几次循环
int mod=ch.length/4;
for(int i=0, i_units=3-mod;i<mod;i++,i_units++){
char[]ch2=Arrays.copyOfRange(ch, i*4, (i*4)+4);//从左往右每次取4位组成新数组
//如果一个子数组返回结果为零，那么后面不加单位
if(read(ch2).equals("零")){//此处不能用“==”
result=result+read(ch2);
}else if(i==0&&read(ch2).startsWith("零")){//最前面的结果不能有零
result=result+read(ch2).substring(1)+units[i_units];
}else{//正常的结果
result=result+read(ch2)+units[i_units];
}
}
return result;
}
private static String read(char[]ch){
String[]num={"零","壹","贰","叁","肆","伍","陆","柒","捌","玖","拾"};
String [] units={"仟","佰","拾",""};
String ss="";
//遍历
for(int i=0;i<4;i++){
String s=ch[i]+"";
//将数组内字节转换成数字
int i_num=Integer.parseInt(s);
//结合条件使用查表法获取结果
if((i_num==0&&i==3)||(i_num==0&&i==0)){
ss=ss;
}else if(i_num==0||i==3){
ss=ss+num[i_num];
}else {
ss=ss+num[i_num]+units[i];
}
}
//使用正则，对多余的零去掉
ss=ss.replaceAll("(.)\\1+","$$$$$$$$1");
return ss;
}
}

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