代码如下：

<span style="font-size:18px;">package test;

import java.util.Scanner;

//将输入的浮点型钱数，转成人民币读法
public class Num2Rmb {

	private static double num;
	private long zheng,xiao;
	private String[] hanArr={"零","壹","贰","叁","肆","伍","陆","柒","捌","玖"};
	private String[] danwei={"千","百","十",""};
	private String[] jinwei={"","万","亿"};
	private int[][] temp= new int[4][18];
    
	//将输入的钱数，转成小数和整数部分
	private void swp(){
		
		zheng=(long)num;
		xiao=Math.round((num-zheng)*100);
	}
	
	//将整数部分按四位划分成3个部分，不存在的补0
	private void divide(){
		
		int i,j,k=0;
		for(i=0;i<3;i++){
			
			long t1=zheng%10000;
			int t=(int) t1;
			zheng=zheng/10000;
			for(j=3;j>=0;j--){
				temp[i][j]=t%10;
				t=t/10;
			}
		}
	}
	
	//检测是否要对当前的四位进行处理
	private int check(int i){
		
	     for(int j=0;j<4;j++)
	    	 if(temp[i][j]!=0)
	    		 return 1;
	     return 0;
	}
	
	//打印结果
	private void print(){
		
		//先处理整数部分
	    //flag用于表示当前部分是否要处理前导0
		int i,j,k,flag=0,cnt=0,flag2=0;
		for(i=2;i>=0;i--){
			if(check(i)==0){
				if(flag==1&&cnt==0){
					System.out.print("零");
					cnt++;
				}
				flag=0;
				continue;
			}
			//处理前导0
			for(j=0;j<4;j++)
				if(temp[i][j]!=0)
					break;
			flag2=1;
			if(j!=0&&flag==1)
				System.out.print("零");
			int d;
			//将末尾的0去掉
			for(d=3;d>=0;d--)
				if(temp[i][d]!=0)
					break;
			for(k=j;k<=d;k++){
				if(temp[i][k]!=0)
				   System.out.print(hanArr[temp[i][k]]+danwei[k]);
				else if(k-1>=0&&temp[i][k-1]!=0){
					System.out.print(hanArr[0]);
				}
			}
			flag=1;
			System.out.print(jinwei[i]);
		}
		if(flag2==1)
		  System.out.print("元");
		//处理小数部分
		if(xiao/10!=0)
			System.out.print(hanArr[(int)xiao/10]+"角");
		if(xiao%10!=0)
			System.out.print(hanArr[(int)xiao%10]+"分");
		System.out.println();
		
	}
	
	//对外的运行接口
	public void run(){
		
		swp();
		divide();
		print();
	}
	
	public static void main(String[] args){
		
	    Scanner sc= new Scanner(System.in);
	    System.out.println("请输入钱数:");
		while(sc.hasNext()){
			
			num = sc.nextDouble();
			Num2Rmb nr =new Num2Rmb();
			/*
			//调试部分
		    nr.swp(); 
			System.out.println(nr.zheng+" "+nr.xiao);
		    nr.divide();
			for(int i=2;i>=0;i--){
				
				for(int j=0;j<4;j++)
					System.out.print(nr.temp[i][j]);
				System.out.println();
			}
			nr.print();
			*/
			nr.run();
		    System.out.println("请输入钱数:");
		}
	}
}
</span>

java程序---将一个浮点数转换成人民币读法