java Graphics2D绘制文字并居中并解决服务器乱码问题

package com.test.testImage;

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

public class Graphics2DTest {

    public static void main(String[] args) {   
        try {  
            String text = "文字居中";
            int width = 500;  
            int height = 400;  
            // 创建BufferedImage对象  
            BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);  
            // 获取Graphics2D  
            Graphics2D g2d = image.createGraphics();  
            // 画图  
            g2d.setBackground(new Color(255,255,255));  
            //g2d.setPaint(new Color(0,0,0));  
            g2d.setColor(Color.red);
            g2d.clearRect(0, 0, width, height);  
            Font font=new Font("宋体",Font.PLAIN,64);  
            g2d.setFont(font);  
            // 抗锯齿
            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            // 计算文字长度，计算居中的x点坐标
            FontMetrics fm = g2d.getFontMetrics(font);
            int textWidth = fm.stringWidth(text);
            int widthX = (width - textWidth) / 2;
            // 表示这段文字在图片上的位置(x,y) .第一个是你设置的内容。
            g2d.drawString(text,widthX,100);  
            // 释放对象  
            g2d.dispose();  
            // 保存文件      
            ImageIO.write(image, "jpg", new File("D:/test.jpg"));  
        }  
        catch(Exception ex) {  
            ex.printStackTrace();  
        }   
    }   
}