im4java包处理图片

使用方法：首先要安装ImageMagick这个工具，安装好这个工具后，再下载im4java包放到项目lib目录里就行了。
package com.stu.util;  
 
import java.io.IOException;
import java.util.ArrayList;  
 
import org.im4java.core.CompositeCmd;
import org.im4java.core.ConvertCmd;
import org.im4java.core.IM4JavaException;
import org.im4java.core.IMOperation;
import org.im4java.core.IdentifyCmd;
import org.im4java.process.ArrayListOutputConsumer;  
 
public class ImagesUtil {
        /**
         * 根据坐标裁剪图片
         *
         * @param srcPath   要裁剪图片的路径
         * @param newPath   裁剪图片后的路径
         * @param x   起始横坐标
         * @param y   起始纵坐标
         * @param x1  结束横坐标
         * @param y1  结束纵坐标
         */
        public static void cutImage(String srcPath, String newPath, int x, int y, int x1,
                int y1)  throws Exception {
            int width = x1 - x;
            int height = y1 - y;
            IMOperation op = new IMOperation();
            op.addImage(srcPath);
            /**  width：裁剪的宽度    * height：裁剪的高度 * x：裁剪的横坐标 * y：裁剪纵坐标  */
            op.crop(width, height, x, y);
            op.addImage(newPath);
            ConvertCmd convert = new ConvertCmd();
            convert.run(op);
        }
        /**
         * 根据尺寸缩放图片
         * @param width  缩放后的图片宽度
         * @param height  缩放后的图片高度
         * @param srcPath   源图片路径
         * @param newPath   缩放后图片的路径
         */
        public static void zoomImage(Integer width, Integer height, String srcPath, String newPath) throws Exception {
            IMOperation op = new IMOperation();
            op.addImage(srcPath);
            if(width == null){//根据高度缩放图片
                op.resize(null, height);
            }else if(height == null){//根据宽度缩放图片
                op.resize(width, null);
            }else {
                op.resize(width, height);
            }
            op.addImage(newPath);
            ConvertCmd convert = new ConvertCmd();
            convert.run(op);
        }    
 
        /**
         * 给图片加水印
         * @param srcPath   源图片路径
         */
        public static void addImgText(String srcPath,String content) throws Exception {
            IMOperation op = new IMOperation();
            op.font("微软雅黑");
            op.gravity("southeast");
            op.pointsize(18).fill("#BCBFC8").draw("text 0,0 "+content);   //("x1 x2 x3 x4") x1 格式，x2 x轴距离 x3 y轴距离  x4名称
            op.addImage();
            op.addImage();
            ConvertCmd convert = new ConvertCmd();
            try {
              convert.run(op,srcPath,srcPath);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        /**
         * 图片水印
         *
         * @param srcImagePath   源图片
         * @param waterImagePath 水印
         * @param destImagePath  生成图片
         * @param gravity  图片位置
         * @param dissolve 水印透明度
         */
        public static void waterMark(String waterImagePath, String srcImagePath, String destImagePath, String gravity, int dissolve) {
            IMOperation op = new IMOperation();
            op.gravity(gravity);
            op.dissolve(dissolve);
            op.addImage(waterImagePath);
            op.addImage(srcImagePath);
            op.addImage(destImagePath);
            CompositeCmd cmd = new CompositeCmd();
            try {
                cmd.run(op);
            } catch (IOException e) {
                e.printStackTrace();
            } catch (InterruptedException e) {
                e.printStackTrace();
            } catch (IM4JavaException e) {
                e.printStackTrace();
            }
        }
        /**
         * 图片旋转
         *
         * @param srcImagePath
         * @param destImagePath
         * @param angle
         */
        public static void rotate(String srcImagePath, String destImagePath, double angle) {
            try {
                IMOperation op = new IMOperation();
                op.rotate(angle);
                op.addImage(srcImagePath);
                op.addImage(destImagePath);
                ConvertCmd cmd = new ConvertCmd();
                cmd.run(op);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }  
 
        /**
         * 图片信息
         *
         * @param imagePath
         * @return
         */
        public static String showImageInfo(String imagePath) {
            String line = null;
            try {
                IMOperation op = new IMOperation();
                op.format("width:%w,height:%h,path:%d%f,size:%b%[EXIF:DateTimeOriginal]");
                op.addImage(1);
                IdentifyCmd identifyCmd = new IdentifyCmd(true);
                ArrayListOutputConsumer output = new ArrayListOutputConsumer();
                identifyCmd.setOutputConsumer(output);
                identifyCmd.run(op, imagePath);
                ArrayList<String> cmdOutput = output.getOutput();
                assert cmdOutput.size() == 1;
                line = cmdOutput.get(0);  
 
            } catch (Exception e) {
                e.printStackTrace();
            }
            return line;
        }
        /**
         * 图片合成
         * @param args
         * @param maxWidth
         * @param maxHeight
         * @param newpath
         * @param mrg
         * @param type 1:横,2:竖
         */
        public static void montage(String[] args,Integer maxWidth,Integer maxHeight,String newpath,Integer mrg,String type) {
            IMOperation op = new IMOperation();
            ConvertCmd cmd = new ConvertCmd();
            String thumb_size = maxWidth+"x"+maxHeight+"^";
            String extent = maxWidth+"x"+maxHeight;
            if("1".equals(type)){
                op.addRawArgs("+append");
            }else if("2".equals(type)){
                op.addRawArgs("-append");
            }  
 
            op.addRawArgs("-thumbnail",thumb_size);
            op.addRawArgs("-gravity","center");
            op.addRawArgs("-extent",extent);  
 
            Integer border_w = maxWidth / 40;
            op.addRawArgs("-border",border_w+"x"+border_w);
            op.addRawArgs("-bordercolor","#ccc");  
 
            op.addRawArgs("-border",1+"x"+1);
            op.addRawArgs("-bordercolor","#fff");  
 
            for(String img : args){
                op.addImage(img);
            }
            if("1".equals(type)){
                Integer whole_width = ((mrg / 2) +1 + border_w + maxWidth + border_w + (mrg / 2) +1)*args.length - mrg;
                Integer whole_height = maxHeight + border_w + 1;
                op.addRawArgs("-extent",whole_width + "x" +whole_height);
            }else if("2".equals(type)){
                Integer whole_width = maxWidth + border_w + 1;
                Integer whole_height = ((mrg / 2) +1 + border_w + maxHeight + border_w + (mrg / 2) +1)*args.length - mrg;
                op.addRawArgs("-extent",whole_width + "x" +whole_height);
            }
            op.addImage(newpath);
            try {
                cmd.run(op);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }  
 
        public static void main(String[] args) throws Exception{
          //addImgText("e://a2.jpg");
            //zoomImage(300, 150, "e://a.jpg", "e://a1.jpg");
            //zoomImage(300, 150, "e://b.jpg", "e://b1.jpg");
            //zoomImage(300, 150, "e://c.jpg", "e://c1.jpg");
            //zoomImage(300, 150, "e://d.jpg", "e://d1.jpg");
            //zoomImage(300, 150, "e://e.jpg", "e://e1.jpg");
        //  zoomImage(300, 150, "e://f.jpg", "e://f1.jpg");
             //waterMark("e://cc.jpg", "e://aa.jpg", "e://bb.jpg", "southeast", 30);
            //rotate("e://aa.jpg", "e://ee.jpg", 90);
            //System.out.println(showImageInfo("e://aa.jpg"));
            String[] files = new String[5];
            files[0] = "e://a1.jpg";
            files[1] = "e://b1.jpg";
            files[2] = "e://c1.jpg";
            files[3] = "e://d1.jpg";
            files[4] = "e://e1.jpg";
            //montage(files, 280, 200, "e://liboy1.jpg", 0,"2");
            //cropImage("e://a.jpg", "e://liboy22.jpg", 1024, 727, 500, 350);
            cutImage("e://a.jpg", "e://liboy222.jpg", 5, 10, 100, 120);
        }
} 
 
//如果是在windows下运行，则需要配置ImageMagick的路径（），如果找不到convert的话，把目录下的magick.exe拷贝一份命名convert.exe

ConvertCmd convert = new ConvertCmd();
convert.setSearchPath("E:\\ImageMagick-7.0.5-Q16");
convert.run(op);