Java Chinese fonts are not displayed under Linux (to solve the problem of Chinese garbled characters in images)

In Java, you can use the following to determine the supported fonts

GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
String[] fontFamilies = ge.getAvailableFontFamilyNames();
for (String s : fontFamilies) {
    System.out.println(s);
}

After jdk15, just create a fallback directory under ~/jre/lib/fonts/, bake the fonts you want to use in java into this directory
 

以下方法在fc6下测试通过,假设用户的jre路径为 /usr/java/jdk1.6.0_03/jre/
#cd /usr/java/jdk1.6.0_03/jre/lib/fonts
#sudo mkdir fallback
将C:\WINDOWS\Fonts\simsun.ttc拷贝到 /usr/java/jdk1.6.0_03/jre/lib/fonts/fallback文件夹内 ok!

Not in win7, win2003 has simsun.ttc

test program

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

public class Test {

	public static void main(String[] args) throws Exception {
		int width = 100;
		int height = 100;
		System.err.println(System.getProperty("sun.jnu.encoding"));
		String s1 = "时段";
//		String s2 = new String("你好".getBytes(System.getProperty("sun.jnu.encoding")), "UTF-8");
//		String s3 = new String("你好".getBytes("GBK"), System.getProperty("sun.jnu.encoding"));
//		String s4 = new String("你好".getBytes(), System.getProperty("sun.jnu.encoding"));

		File file = new File("/home/image.jpg");

		Font font = new Font("Serif", Font.BOLD, 10);
		BufferedImage bi = new BufferedImage(width, height,
				BufferedImage.TYPE_INT_RGB);
		Graphics2D g2 = (Graphics2D) bi.getGraphics();
		g2.setBackground(Color.WHITE);
		g2.clearRect(0, 0, width, height);
		g2.setPaint(Color.RED);

		FontRenderContext context = g2.getFontRenderContext();
		Rectangle2D bounds = font.getStringBounds(s1 , context);
		double x = (width - bounds.getWidth()) / 2;
		double y = (height - bounds.getHeight()) / 2;
		double ascent = -bounds.getY();
		double baseY = y + ascent;

		g2.drawString(s1, (int) x, (int) baseY);

		ImageIO.write(bi, "jpg", file);
	}

}