Java设置打印时的纸张尺寸并支持自定义尺寸

package news;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.print.Book;

import java.awt.print.PageFormat;

import java.awt.print.Paper;

import java.awt.print.Printable;

import java.awt.print.PrinterException;

import java.awt.print.PrinterJob;

import java.text.DecimalFormat;

import java.text.NumberFormat;

import javax.print.PrintService;

import javax.print.PrintServiceLookup;

import javax.print.attribute.HashAttributeSet;

import javax.print.attribute.standard.PrinterName;

public class PrintWarranty implements P