java 图片裁剪代码

package com.actionsoft.apps.addons.invoice.pc.test;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;

import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;

import jodd.log.Logger;
import jodd.log.LoggerFactory;

public class JavaTest {

public static void main(String[] args) {
// System.out.println(",1,2,3,4,5,张三,李四,".replaceAll("张三,",""));
new JavaTest().cutImage("C:/Users/Administrator/Pictures/5.jpg", "D:/",200, 300, 400, 300);
}

private Logger log = LoggerFactory.getLogger(getClass());

private static String DEFAULT_CUT_PREVFIX = "cut_";

/**
* Description: 依据原图与裁切size截取局部图片
* @param srcImg 源图片
* @param output 图片输出流
* @param rect 须要截取部分的坐标和大小
*/
public void cutImage(File srcImg, OutputStream output,java.awt.Rectangle rect) {
if (srcImg.exists()) {
java.io.FileInputStream fis = null;
ImageInputStream iis = null;
try {
fis = new FileInputStream(srcImg);
// ImageIO 支持的图片类型 : [BMP, bmp, jpg, JPG, wbmp, jpeg, png, PNG,
// JPEG, WBMP, GIF, gif]
String types = Arrays.toString(ImageIO.getReaderFormatNames())
.replace("]", ",");
String suffix = null;
// 获取图片后缀
if (srcImg.getName().indexOf(".") > -1) {
suffix = srcImg.getName().substring(srcImg.getName().lastIndexOf(".") + 1);
}// 类型和图片后缀所有小写。然后推断后缀是否合法
if (suffix == null
|| types.toLowerCase().indexOf(suffix.toLowerCase() + ",") < 0) {
log.error("Sorry, the image suffix is illegal. the standard image suffix is {}."+ types);
return;
}
// 将FileInputStream 转换为ImageInputStream
iis = ImageIO.createImageInputStream(fis);
// 依据图片类型获取该种类型的ImageReader
ImageReader reader = ImageIO.getImageReadersBySuffix(suffix).next();
reader.setInput(iis, true);
ImageReadParam param = reader.getDefaultReadParam();
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param);
ImageIO.write(bi, suffix, output);
log.info("图片生成成功，请到文件夹下查看");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (fis != null)
fis.close();
if (iis != null)
iis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
} else {
log.warn("the src image is not exist.");
}
}

//生成目标文件路径
public void cutImage(File srcImg, String destImgPath,java.awt.Rectangle rect) {
File destImg = new File(destImgPath);
if (destImg.exists()) {
String p = destImg.getPath();
try {
if (!destImg.isDirectory())
p = destImg.getParent();
if (!p.endsWith(File.separator))
p = p + File.separator;
cutImage(srcImg,new java.io.FileOutputStream(p + DEFAULT_CUT_PREVFIX+ "_"+ srcImg.getName()), rect);
} catch (FileNotFoundException e) {
log.warn("the dest image is not exist.");
}
} else
log.warn("the dest image folder is not exist.");
}

public void cutImage(String srcImg, String destImg, int x, int y, int width,
int height) {
cutImage(new File(srcImg), destImg, new java.awt.Rectangle(x, y, width, height));
}

}