正文
java对图片的裁剪（包括来自网络的图片）
小程序：扫一扫查出行【扫一扫了解最新限行尾号】
复制小程序
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import java.util.Random; import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream; /**
* 剪裁图片(从网络上获取图片) * @description
* @time 2013-2-24下午02:07:00 * @version
*/
public class CutImageUtil { private static final String DESTIMAGEPATH = "e://";
private static final String BASE_IMAGE_URL="http://pimages3.tianjimedia.com/resources/product/";
/**剪切点X坐标*/
private static int x=16;
/**剪切点Y坐标*/
private static int y=22;
/**剪切点宽度*/
private static int width=784;
/**剪切点高度*/
private static int height=560; /**
*
* @Description: 剪切网络图片
* String
*/
public static String cutFromUrl(String imageUrl) {
String suffix=imageUrl.substring(imageUrl.lastIndexOf("."));
String fileName="";
String fileNameAndPath="";
InputStream is = null;
ImageInputStream iis = null;
String result=null;
try {
/**读取图片*/
Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName("jpg");
ImageReader reader = it.next();
/**获取图片流*/
URL url = new URL(imageUrl);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
/**设置请求方式为"GET"*/
httpConn.setRequestMethod("GET");
/**超时响应时间为5秒*/
httpConn.setConnectTimeout(5 * 1000);
httpConn.connect();
is = httpConn.getInputStream(); iis = ImageIO.createImageInputStream(is);
reader.setInput(iis, true); ImageReadParam param = reader.getDefaultReadParam();
Rectangle rect = new Rectangle(x, y, width, height);
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param); fileName=GlobalMethodUtil.createFileName(suffix);
fileNameAndPath=GlobalMethodUtil.createDir("/home/tmp/resources/product/")+fileName;
if(fileNameAndPath==null||fileNameAndPath.equals("")){
result="";
}else{
result=BASE_IMAGE_URL+fileNameAndPath.substring(fileNameAndPath.indexOf("product/")+8);
}
ImageIO.write(bi, "jpg", new File(fileNameAndPath));
} catch (Exception ex) {
ex.printStackTrace();
} finally {
try {
if (is != null) {
is.close();
}
if (iis != null) {
iis.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
return result;
} /**
*
* @Description: 剪切本地图片
* @param imagePath
* String
*/
public static String cutLocalImage(String imagePath) {
String fileName="";
String fileNameAndPath="";
FileInputStream fis = null;
ImageInputStream iis = null;
try {
/**读取图片*/
Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName("jpg");
ImageReader reader = it.next();
/**获取图片流*/
fis = new FileInputStream(imagePath);
iis = ImageIO.createImageInputStream(fis);
reader.setInput(iis, true); ImageReadParam param = reader.getDefaultReadParam();
Rectangle rect = new Rectangle(x, y, width, height);
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param); fileName=GlobalMethodUtil.createFileName("jpg");
fileNameAndPath=GlobalMethodUtil.createDir("/home/tmp/qicheInfo/resources/product/")+fileName;
ImageIO.write(bi, "jpg", new File(DESTIMAGEPATH + new Date().getTime() + "." + "jpg"));
} catch (Exception ex) {
ex.printStackTrace();
} finally {
try {
if (fis != null) {
fis.close();
}
if (iis != null) {
iis.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
return BASE_IMAGE_URL+fileNameAndPath.substring(fileNameAndPath.indexOf("product/")+8);
} private static class GlobalMethodUtil { /**
* 返回文件名(file)
* @Description:
* @return
*/
public static String createFileName(String suffix) {
/**结合目录和文件名 生成唯一标识符*/
Calendar c = Calendar.getInstance();
/**利用小时分钟毫秒和源文件的文件名生成新文件名+文件后缀*/
String name = c.get(Calendar.HOUR) + "" + c.get(Calendar.MINUTE) + "" + c.get(Calendar.SECOND)
+ c.get(Calendar.MILLISECOND) + randStr()
+ suffix;
return name;
} /**
* 利用26个字母生成随机字母组合
* @Description:
* @return
*/
public static String randStr() {
String[] rands = {"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "k", "o", "p", "q",
"r", "s", "t", "u", "v", "w", "x", "y", "z"};
String randstr = "";
/**生成8个随机字母组合*/
for (int i = 0; i < 8; i++) {
randstr += rands[new Random().nextInt(26)];
}
return randstr;
} /**
* 创建文件目录
* @Description:
* @return 文件目录路径
*/
public static String createDir(String path) {
Calendar c = Calendar.getInstance();
String dir = path;
dir += c.get(Calendar.YEAR) + "" + ((c.get(Calendar.MONTH) + 1)<10?"0"+(c.get(Calendar.MONTH) + 1):(c.get(Calendar.MONTH) + 1)) + "" + (c.get(Calendar.DATE)<10?"0"+c.get(Calendar.DATE):c.get(Calendar.DATE)) + "/";
File tempDir = new File(dir);
/**判断文件路径是否存在*/
if (!tempDir.exists()) {
/**不存在就创建文件目录*/
tempDir.mkdirs();
}
return dir;
} /**
*
* @Description: 获取分页的总页数
* @param count 数据总量
* @param size 每页分页数量
* @return
* int
*/
public static int getPageSize(int count,int size){
return count%size!=0?(count/size+1):(count/size);
} }
}
