java 根据坐标和宽高对图片做剪切

1import java.awt.Color;
2import java.awt.Graphics;
3import java.awt.Image;
4import java.awt.Rectangle;
5import java.awt.image.BufferedImage;
6import java.io.File;
7import java.io.FileInputStream;
8import java.io.FileNotFoundException;
9import java.io.FileOutputStream;
10import java.io.IOException;
11import java.io.OutputStream;
12import java.util.Arrays;
13import java.util.Date;
14
15import javax.imageio.ImageIO;
16import javax.imageio.ImageReadParam;
17import javax.imageio.ImageReader;
18import javax.imageio.stream.ImageInputStream;
19
20import com.lg.res.bean.common.FileData;
21
22
23
24
25public class ImageTailorUtil {
26
27    
28    private static String DEFAULT_THUMB_PREVFIX = "thumb_";
29    private static String DEFAULT_CUT_PREVFIX = "cut_";
30    private static Boolean DEFAULT_FORCE = false;
31    
32    
33    /**
34    
35     * @param srcImg    源图片
36     * @param output    图片输出流
37     * @param rect      需要截取部分的坐标和大小
38     */
39    public boolean cutImage(File srcImg, OutputStream output, Rectangle rect){
40        if(srcImg.exists()){
41            FileInputStream fis = null;
42            ImageInputStream iis = null;
43            try {
44                fis = new FileInputStream(srcImg);
45                // ImageIO 支持的图片类型 : [BMP, bmp, jpg, JPG, wbmp, jpeg, png, PNG, JPEG, WBMP, GIF, gif]
46                String types = Arrays.toString(ImageIO.getReaderFormatNames()).replace("]", ",");
47                String suffix = null;
48                // 获取图片后缀
49                if(srcImg.getName().indexOf(".") > -1) {
50                    suffix = srcImg.getName().substring(srcImg.getName().lastIndexOf(".") + 1);
51                }// 类型和图片后缀全部小写，然后判断后缀是否合法
52                if(suffix == null || types.toLowerCase().indexOf(suffix.toLowerCase()+",") < 0){
53                    System.out.println("Sorry, the image suffix is illegal. the standard image suffix is {}." + types);
54                    return false;
55                }
56                // 将FileInputStream 转换为ImageInputStream
57                iis = ImageIO.createImageInputStream(fis);
58                // 根据图片类型获取该种类型的ImageReader
59                ImageReader reader = ImageIO.getImageReadersBySuffix(suffix).next();
60                reader.setInput(iis,true);
61                ImageReadParam param = reader.getDefaultReadParam();
62                param.setSourceRegion(rect);
63                BufferedImage bi = reader.read(0, param);
64                ImageIO.write(bi, suffix, output);
65                return true;
66            } catch (FileNotFoundException e) {
67                e.printStackTrace();
68            } catch (IOException e) {
69                e.printStackTrace();
70            } finally {
71                try {
72                    if(fis != null) fis.close();
73                    if(iis != null) iis.close();
74                } catch (IOException e) {
75                    e.printStackTrace();
76                }
77            }
78        }else {
79            System.out.println("the src image is not exist.");
80        }
81        return false;
82    }
83    
84    public void cutImage(File srcImg, OutputStream output, int x, int y, int width, int height){
85        cutImage(srcImg, output, new Rectangle(x, y, width, height));
86    }
87    
88    public FileData cutImage(File srcImg, String destImgPath, Rectangle rect){
89    	FileData fd = new FileData();
90    	String middledir = "cut_pic/"+SimpleDate.getCurDateLong();//中间路径
91        File destImg = new File(destImgPath+"/"+middledir);
92        if(!destImg.exists()){
93        	System.out.println("the dest "+destImgPath+"  folder is not exist.");
94        	destImg.mkdirs();
95        	System.out.println("create "+destImgPath+" folder ");
96        }
97        String cutFolderPath = destImg.getPath();
98        try {
99        	
100            if(!destImg.isDirectory()) cutFolderPath = destImg.getParent();
101            if(!cutFolderPath.endsWith(File.separator)) cutFolderPath = cutFolderPath + File.separator;
102            String fileName = srcImg.getName();
103            String suffix = fileName.substring(fileName.lastIndexOf("."));
104            String newfileName = DEFAULT_CUT_PREVFIX + "_" + new Date().getTime() + suffix;
105            String outPutFilePath =cutFolderPath+ newfileName;
106            System.out.println(outPutFilePath);
107            boolean b = cutImage(srcImg, new FileOutputStream(outPutFilePath), rect);
108            if (b) {
109				fd.setTailorPicPath(middledir+"/"+newfileName);
110				return fd;
111			}
112        } catch (FileNotFoundException e) {
113            System.out.println("the dest "+destImgPath+"  is not exist.");
114        }
115        return null;
116    }
117    /**
118     * 
119     * @param srcImg  原图片
120     * @param destImg 存放新生成的图片的文件夹路径
121     * @param x	左上角 x轴坐标
122     * @param y	左上角 y轴坐标
123     * @param width 宽
124     * @param height 高
125     */
126    public FileData cutImage(File srcImg, String destImg, int x, int y, int width, int height){
127    	if (!srcImg.exists()) {
128			return null;
129		}
130        return cutImage(srcImg, destImg, new Rectangle(x, y, width, height));
131    }
132    /**
133     * 
134     * @param srcImg  原图片
135     * @param destImg 存放新生成的图片的文件夹路径
136     * @param x	左上角 x轴坐标
137     * @param y	左上角 y轴坐标
138     * @param width 宽
139     * @param height 高
140     */
141    public FileData cutImage(String srcImg, String destImg, int x, int y, int width, int height){
142        return cutImage(new File(srcImg), destImg, new Rectangle(x, y, width, height));
143    }
144}