利用Nginx 代理输出缩放图片

<code><span># document ppt convert  Configuration.</span>
upstream <span>document</span>.polyv.net {
    server <span>127.0</span><span>.0</span><span>.1</span>:<span>8080</span>;
}

server {
    listen <span>80</span>;
    server_name <span>document</span>.polyv.net;
    index index.html index.htm;
    charset utf-<span>8</span>;
    client_max_body_size    <span>1000</span>m;

    <span># ignore favicon.ico not exist.</span>
    location = /favicon.ico {
        log_not_found <span>off</span>;
        access_log <span>off</span>;
    }

    <span># not allow to visit hidden files.</span>
    location ~ /\. {
        deny all;
        access_log <span>off</span>;
        log_not_found <span>off</span>;
    }

    location / {
        <span>if</span> ($request_filename ~* ^.*?\.(txt|doc|pdf|rar|gz|zip|docx|exe|xlsx|ppt|pptx)$) {
            add_header Content-<span>Disposition</span>: <span>'attachment;'</span>;
            add_header Content-<span>Type</span>: <span>'APPLICATION/OCTET-STREAM'</span>;
        }

        proxy_pass <span>http</span>:<span>//</span><span>document</span>.polyv.net;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header REQUEST_HOST $host;

        <span># include proxy.conf;</span>
        charset UTF-<span>8</span>;
    }

    <span># user upload files</span>
    location <span>/images/</span> {
            <span>#expires 7d;</span>
        alias <span>/data03/ovp/blobs/</span>;
            proxy_store <span>on</span>;
            proxy_store_access <span>user</span>:rw <span>group</span>:rw <span>all</span>:rw;
            proxy_set_header Accept-Encoding <span>""</span>;
            <span>if</span> ( !-f $request_filename ) {
                proxy_pass <span>http</span>:<span>//</span><span>document</span>.polyv.net;
            }
    }

    location <span>/blobs/</span> {
            <span>#expires 7d;</span>
        alias <span>/data03/ovp/blobs/</span>;
    }

        location <span>/preview/images/</span> {
            <span>#expires 7d;</span>
            alias <span>/data03/ovp/blobs/</span>;
            proxy_store <span>on</span>;
            proxy_store_access <span>user</span>:rw <span>group</span>:rw <span>all</span>:rw;
            proxy_set_header Accept-Encoding <span>""</span>;
            <span>if</span> ( !-f $request_filename ) {
                proxy_pass <span>http</span>:<span>//</span><span>document</span>.polyv.net;
            }
        }

}



</code>

<code>package <span>com</span><span>.document</span><span>.handle</span><span>.controller</span><span>;</span>import java<span>.io</span><span>.BufferedInputStream</span><span>;</span>
import java<span>.io</span><span>.File</span><span>;</span>
import java<span>.io</span><span>.IOException</span><span>;</span>
import java<span>.io</span><span>.OutputStream</span><span>;</span>
import java<span>.net</span><span>.HttpURLConnection</span><span>;</span>
import java<span>.net</span><span>.URL</span><span>;</span>import javax<span>.servlet</span><span>.http</span><span>.HttpServletRequest</span><span>;</span>
import javax<span>.servlet</span><span>.http</span><span>.HttpServletResponse</span><span>;</span>import org<span>.apache</span><span>.commons</span><span>.lang</span>3<span>.StringUtils</span><span>;</span>
import org<span>.slf</span>4j<span>.Logger</span><span>;</span>
import org<span>.slf</span>4j<span>.LoggerFactory</span><span>;</span>
import org<span>.springframework</span><span>.stereotype</span><span>.Controller</span><span>;</span>
import org<span>.springframework</span><span>.web</span><span>.bind</span><span>.ServletRequestUtils</span><span>;</span>
import org<span>.springframework</span><span>.web</span><span>.bind</span><span>.annotation</span><span>.PathVariable</span><span>;</span>
import org<span>.springframework</span><span>.web</span><span>.bind</span><span>.annotation</span><span>.RequestMapping</span><span>;</span>import <span>com</span><span>.document</span><span>.tool</span><span>.ImageMagickUtils</span><span>;</span>
import <span>com</span><span>.document</span><span>.tool</span><span>.SystemConfig</span><span>;</span>@Controller
public class ImageAgentController {

    private static final Logger LOG = LoggerFactory<span>.getLogger</span>(ImageAgentController<span>.class</span>)<span>;</span><span>/**
     * ppt预览图片代理输出
     * @throws IOException
     */</span>
    @RequestMapping(<span>"/preview/images/{year}/{month}/{md5id}/{preview}/{filename}.{ext}"</span>)
    public void cropImage(@PathVariable String year, @PathVariable String month, @PathVariable String md5id,
            @PathVariable String preview, @PathVariable String filename, @PathVariable String ext,
            HttpServletRequest request, HttpServletResponse response) throws IOException {
        // String rootDir = <span>"/data03/ovp/blobs/"</span><span>;</span>
        String rootDir = SystemConfig<span>.getBlobDirectory</span>()<span>;</span>
        String oname = filename<span>.substring</span>(<span>1</span>, filename<span>.length</span>())<span>;// 原图文件名</span>
        String dirString = rootDir + year + <span>"/"</span> + month + <span>"/"</span> + md5id + <span>"/"</span> + oname + <span>"."</span> + ext<span>;</span>
        String targetFileString = rootDir + year + <span>"/"</span> + month + <span>"/"</span> + md5id + <span>"/preview/"</span> + filename + <span>"."</span> + ext<span>;</span>        //如果原图存在
        File originImage = new File(oname)<span>;</span>
        if(originImage<span>.exists</span>()){
            LOG<span>.info</span>(<span>"corpImage..."</span> + dirString + <span>" -> "</span> + targetFileString)<span>;</span>
            File newfile = new File(targetFileString)<span>;</span>
            String pathString = newfile<span>.getParent</span>()<span>;</span>
            LOG<span>.info</span>(<span>"pathString...{} {}"</span>, pathString)<span>;</span>
            File pathFile = new File(pathString)<span>;</span>
            if (!pathFile<span>.exists</span>()) {
                LOG<span>.info</span>(<span>"---create file---"</span>)<span>;</span>
                pathFile<span>.mkdirs</span>()<span>;</span>
            }
            boolean status = ImageMagickUtils<span>.scale</span>(dirString, targetFileString, <span>240</span>, <span>180</span>)<span>;</span>
            if (status) {
                response<span>.reset</span>()<span>;</span>
                response<span>.setContentType</span>(<span>"image/"</span> + ext)<span>;</span>                java<span>.io</span><span>.InputStream</span><span>in</span> = new java<span>.io</span><span>.FileInputStream</span>(targetFileString)<span>;</span>
                // FilenameUrlUtils<span>.getImageFilename</span>(targetFileString)<span>;</span>                if (<span>in</span> != null) {
                    byte[] b = new byte[<span>1024</span>]<span>;</span>
                    int len<span>;</span>
                    while ((len = <span>in</span><span>.read</span>(b)) != -<span>1</span>) {
                        response<span>.getOutputStream</span>()<span>.write</span>(b)<span>;</span>
                    }

                    <span>in</span><span>.close</span>()<span>;</span>
                }
            }
        }else{
            LOG<span>.info</span>(<span>"原图目录不存在-preview：{}"</span>,dirString)<span>; </span>
        }
    }


    <span>/**
     * ppt固定尺寸图片代理输出
     * @throws IOException
     * http://document.polyv.net/images/2016/03/de37d2ceb11ac068c18c5e4428541075/jpg-3/1000x540.png
     *
     * http://document.polyv.net/images/2016/03/de37d2ceb11ac068c18c5e4428541075/jpg-3.png
     */</span>
    @RequestMapping(<span>"/images/{year}/{month}/{md5id}/{filename}/{width}x{height}.{ext}"</span>)
    public void cropfixedImage(@PathVariable String year, @PathVariable String month, @PathVariable String md5id,
            @PathVariable String filename, @PathVariable Integer width, @PathVariable Integer height, @PathVariable String ext,
            HttpServletRequest request, HttpServletResponse response) throws IOException {
        // String rootDir = <span>"/data03/ovp/blobs/"</span><span>;</span>
        String rootDir = SystemConfig<span>.getBlobDirectory</span>()<span>;</span>
        //String oname = filename<span>.substring</span>(<span>1</span>, filename<span>.length</span>())<span>;// 原图文件名</span>
        String dirString = rootDir + year + <span>"/"</span> + month + <span>"/"</span> + md5id + <span>"/"</span> + ( filename + <span>"."</span> + ext)<span>;</span>
        String targetFileString = rootDir + year + <span>"/"</span> + month + <span>"/"</span> + md5id + <span>"/"</span> + filename + <span>"/"</span> + (width + <span>"x"</span> + height + <span>"."</span> + ext)<span>;</span>        //如果原图存在
        File originImage = new File(dirString)<span>;</span>
        if(originImage<span>.exists</span>()){
            File targetFileStringFile = new File(targetFileString)<span>;</span>
            if(!targetFileStringFile<span>.exists</span>()){
                LOG<span>.info</span>(<span>"corpImage..."</span> + dirString + <span>" -> "</span> + targetFileString)<span>;</span>
                File newfile = new File(targetFileString)<span>;</span>
                String pathString = newfile<span>.getParent</span>()<span>;</span>
                LOG<span>.info</span>(<span>"pathString...{} {}"</span>, pathString)<span>;</span>
                File pathFile = new File(pathString)<span>;</span>
                if (!pathFile<span>.exists</span>()) {
                    LOG<span>.info</span>(<span>"---create file---"</span>)<span>;</span>
                    pathFile<span>.mkdirs</span>()<span>;</span>
                }
                ImageMagickUtils<span>.resizeWH</span>(dirString, targetFileString,width,height)<span>;</span>
            }
            response<span>.setContentType</span>(<span>"image/"</span> + ext)<span>;</span>
            java<span>.io</span><span>.InputStream</span><span>in</span> = null<span>;</span>
            try{
                <span>in</span> = new java<span>.io</span><span>.FileInputStream</span>(targetFileString)<span>;</span>
                response<span>.setContentLength</span>(<span>in</span><span>.available</span>())<span>;</span>
                byte[] buffer = new byte[<span>1024</span>]<span>;</span>
                int count = <span>0</span><span>;</span>
                while ((count = <span>in</span><span>.read</span>(buffer)) > <span>0</span>) {
                    response<span>.getOutputStream</span>()<span>.write</span>(buffer, <span>0</span>, count)<span>;</span>
                }
                response<span>.flushBuffer</span>()<span>;</span>
            }catch(Exception e){
                e<span>.printStackTrace</span>()<span>;</span>
            }finally {
                try {
                    <span>in</span><span>.close</span>()<span>;</span>
                } catch (Exception e) {

                }
            }
        }else{
            LOG<span>.info</span>(<span>"原图目录不存在：{}"</span>,dirString)<span>;</span>
        }




    }


    <span>/**
     * 图片下载
     */</span>
    @RequestMapping(<span>"get/image/data"</span>)
    public void downloadImage(HttpServletRequest request, HttpServletResponse response) throws IOException {  
        String filePath = ServletRequestUtils<span>.getStringParameter</span>(request, <span>"filePath"</span>, <span>""</span>)<span>; //图片访问路劲</span>
        String fileName = ServletRequestUtils<span>.getStringParameter</span>(request, <span>"fileName"</span>, <span>""</span>)<span>; //名称</span>        if(StringUtils<span>.isNotBlank</span>(filePath) || StringUtils<span>.isNotBlank</span>(fileName)){
            String destUrl = filePath<span>;</span>
            //LOG<span>.info</span>(<span>"--------------"</span>+filePath)<span>; </span>
            String fileFormat=filePath<span>.substring</span>(filePath<span>.lastIndexOf</span>(<span>"."</span>))<span>;</span>
            //String name=fileName<span>.trim</span>()+fileFormat<span>;</span>
            String name=filePath<span>.substring</span>(filePath<span>.lastIndexOf</span>(<span>"/"</span>)+<span>1</span>, filePath<span>.length</span>())<span>; </span>
            //File f = new File(filePath)<span>;</span>
            //response<span>.setHeader</span>(<span>"Content-Disposition"</span>, <span>"attachment; filename="</span>+java<span>.net</span><span>.URLEncoder</span><span>.encode</span>(f<span>.getName</span>(),<span>"UTF-8"</span>))<span>;  </span>
            //LOG<span>.info</span>(<span>"--------------"</span>+f<span>.getName</span>())<span>;</span>            // 建立链接  
            URL url = new URL(destUrl)<span>;  </span>
            HttpURLConnection httpUrl = (HttpURLConnection) url<span>.openConnection</span>()<span>;  </span>
            // 连接指定的资源  
            httpUrl<span>.connect</span>()<span>;  </span>
            // 获取网络输入流  
            BufferedInputStream bis = new BufferedInputStream(httpUrl<span>.getInputStream</span>())<span>;  </span>            Integer lenf=httpUrl<span>.getContentLength</span>()<span>;</span>
            //String lenf=this<span>.getFileLength</span>(<span>4189053</span>, <span>7189053</span>)<span>;</span>
            response<span>.setContentType</span>(<span>"application/x-msdownload"</span>)<span>; </span>
            response<span>.setHeader</span>(<span>"Content-Length"</span>, lenf<span>.toString</span>())<span>;//文件大小值5几M</span>
            response<span>.setHeader</span>(<span>"Content-Disposition"</span>, <span>"attachment; filename="</span>+java<span>.net</span><span>.URLEncoder</span><span>.encode</span>(name,<span>"UTF-8"</span>))<span>;</span>
            OutputStream <span>out</span> = response<span>.getOutputStream</span>()<span>;</span>
            byte[] buf = new byte[<span>1024</span>]<span>;  </span>
            if (destUrl != null) {  
                BufferedInputStream br = bis<span>;  </span>
                int len = <span>0</span><span>;  </span>
                while ((len = br<span>.read</span>(buf)) > <span>0</span>){  
                    <span>out</span><span>.write</span>(buf, <span>0</span>, len)<span>;  </span>
                }                 
                br<span>.close</span>()<span>;  </span>
            }  
            <span>out</span><span>.flush</span>()<span>;  </span><span>out</span><span>.close</span>()<span>;  </span>
        }

    } 

}
</code>

<code><span>package</span> com.document.tool;

<span>import</span> java.io.IOException;

<span>import</span> javax.swing.ImageIcon;

<span>import</span> org.apache.commons.exec.CommandLine;
<span>import</span> org.apache.commons.exec.DefaultExecuteResultHandler;
<span>import</span> org.apache.commons.exec.DefaultExecutor;
<span>import</span> org.apache.commons.exec.ExecuteException;
<span>import</span> org.apache.commons.exec.ExecuteWatchdog;
<span>import</span> org.apache.commons.exec.Executor;
<span>import</span> org.slf4j.Logger;
<span>import</span> org.slf4j.LoggerFactory;

<span>/**
 * 使用ImageMagick对图片文件进行处理的工具类。
 *<span> @author</span> XingNing OU
 */</span><span>public</span><span>abstract</span><span><span>class</span><span>ImageMagickUtils</span> {</span><span>private</span><span>static</span><span>final</span> String EXECUTABLE_CONVERT = <span>"/usr/bin/convert"</span>; <span>// convert命令</span><span>private</span><span>static</span><span>final</span> String EXECUTABLE_COMPOSITE = <span>"/usr/bin/composite"</span>; <span>// composite命令</span><span>private</span><span>static</span><span>final</span><span>long</span> EXECUTE_TIMEOUT = <span>30</span> * <span>60</span> * <span>1000</span>L; <span>// 30 minutes</span><span>private</span><span>static</span><span>final</span> Logger LOG = LoggerFactory.getLogger(ImageMagickUtils.class);

    <span>/**
     * 执行图片处理的命令。
     *<span> @param</span> cmdLine 待执行的命令
     *<span> @return</span> exitValue，一般等于0时表示正常运行结束
     *<span> @throws</span> ExecuteException 命令执行失败时抛出此异常
     *<span> @throws</span> IOException 当发生IO错误时抛出此异常
     *<span> @throws</span> InterruptedException 当等待异步返回结果被中断时抛出此异常
     */</span><span>public</span><span>static</span><span>int</span><span>executeCommandLine</span>(CommandLine cmdLine) <span>throws</span> ExecuteException, IOException,
    InterruptedException {
        Executor executor = <span>new</span> DefaultExecutor();
        executor.setExitValue(<span>0</span>);

        <span>// Kill a run-away process after EXECUTE_TIME milliseconds.</span>
        ExecuteWatchdog watchdog = <span>new</span> ExecuteWatchdog(EXECUTE_TIMEOUT);
        executor.setWatchdog(watchdog);

        <span>// Execute the print job asynchronously.</span>
        DefaultExecuteResultHandler resultHandler = <span>new</span> DefaultExecuteResultHandler();
        executor.execute(cmdLine, resultHandler);

        <span>// Some time later the result handler callback was invoked.</span>
        resultHandler.waitFor();

        <span>// So we can safely request the exit value.</span><span>return</span> resultHandler.getExitValue();
    }

    <span>/**
     * 按照高宽比例缩小图片。
     *<span> @param</span> src 源图片
     *<span> @param</span> dst 目标图片
     *<span> @param</span> width 图片图片的宽度
     *<span> @param</span> height 目标图片的高度
     *<span> @return</span> 是否处理成功
     */</span><span>public</span><span>static</span><span>boolean</span><span>scale</span>(String src, String dst, <span>int</span> width, <span>int</span> height) {
        <span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_CONVERT);
        cmdLine.addArgument(src);
        cmdLine.addArgument(<span>"-scale"</span>);
        cmdLine.addArgument(width + <span>"x"</span> + height);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"缩略图片时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }

    <span>/**
     * 按照高宽比例缩小图片。
     *<span> @param</span> src 源图片
     *<span> @param</span> dst 目标图片
     *<span> @param</span> width 图片图片的宽度
     *<span> @param</span> height 目标图片的高度
     *<span> @return</span> 是否处理成功
     */</span><span>public</span><span>static</span><span>boolean</span><span>thumbnail</span>(String src, String dst, <span>int</span> width, <span>int</span> height) {
        <span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_CONVERT);
        cmdLine.addArgument(src);
        cmdLine.addArgument(<span>"-thumbnail"</span>);
        cmdLine.addArgument(width + <span>"x"</span> + height);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"缩略图片时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }

    <span>/**
     * 添加图片水印。
     *<span> @param</span> src 源图片
     *<span> @param</span> dst 目标图片
     *<span> @param</span> logofile 水印图片
     *<span> @param</span> dissolve 和水印的融合度,0-100的数字
     *<span> @param</span> gravity 叠放方向,East,West,North,South,NorthEast,NorthWest,SouthEast,SouthWest
     *<span> @return</span> 是否处理成功
     */</span><span>public</span><span>static</span><span>boolean</span><span>drawLogo</span>(String src, String dst, String logofile, <span>int</span> dissolve, String gravity) {
        <span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_COMPOSITE);
        cmdLine.addArgument(<span>"-dissolve"</span>);
        cmdLine.addArgument(dissolve + <span>"%"</span>);
        cmdLine.addArgument(<span>"-gravity"</span>);
        cmdLine.addArgument(gravity);
        cmdLine.addArgument(logofile);
        cmdLine.addArgument(src);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"添加图片水印时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }

    <span>/**
     * 添加图片水印。
     *<span> @param</span> src 源图片
     *<span> @param</span> dst 目标图片
     *<span> @param</span> logofile 水印图片
     *<span> @param</span> dissolve 和水印的融合度,0-100的数字
     *<span> @param</span> x 水印距离左下角的距离
     *<span> @param</span> y 水印距离右下角的距离
     *<span> @return</span> 是否处理成功
     */</span><span>public</span><span>static</span><span>boolean</span><span>drawLogo</span>(String src, String dst, String logofile, <span>int</span> dissolve, <span>int</span> x, <span>int</span> y) {
        ImageIcon icon = <span>new</span> ImageIcon(src);
        <span>int</span> width = icon.getIconWidth(); <span>// 源图的宽</span><span>int</span> height = icon.getIconHeight(); <span>// 源图的高</span>        String _x = String.valueOf(width - x); <span>// 在x轴上水印图片的左上顶点距离图片左上角的距离</span>
        String _y = String.valueOf(height - y); <span>// 在y轴上水印图片的左上顶点距离图片左上角的距离</span><span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_COMPOSITE);
        cmdLine.addArgument(<span>"-dissolve"</span>);
        cmdLine.addArgument(dissolve + <span>"%"</span>);
        cmdLine.addArgument(<span>"-geometry"</span>);
        cmdLine.addArgument(_x + <span>"+"</span> + _y);
        cmdLine.addArgument(logofile);
        cmdLine.addArgument(src);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"添加图片水印时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }

    <span>/**
     * 裁剪图片。
     *<span> @param</span> src 源图片
     *<span> @param</span> dst 目标图片
     *<span> @param</span> width 目标宽度
     *<span> @param</span> height 目标高度
     *<span> @param</span> left 裁剪位置：距离左边的像素
     *<span> @param</span> top 裁剪位置：距离上边的像素
     *<span> @return</span> 是否处理成功
     */</span><span>public</span><span>static</span><span>boolean</span><span>crop</span>(String src, String dst, <span>int</span> width, <span>int</span> height, <span>int</span> left, <span>int</span> top) {
        <span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_CONVERT);
        cmdLine.addArgument(src);
        cmdLine.addArgument(<span>"-crop"</span>);
        cmdLine.addArgument(width + <span>"x"</span> + height + <span>"+"</span> + left + <span>"+"</span> + top);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"裁剪图片时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }

    <span>/**
     * 获取矩形的小图。
     *<span> @param</span> src 源图片
     *<span> @param</span> dst 目标图片
     *<span> @param</span> width 目标宽度
     *<span> @param</span> height 目标高度
     *<span> @param</span> left 裁剪位置：距离左边的像素
     *<span> @param</span> top 裁剪位置：距离上边的像素
     *<span> @return</span> 是否处理成功
     */</span><span>public</span><span>static</span><span>boolean</span><span>cropRect</span>(String src, String dst, <span>int</span> width, <span>int</span> height, <span>int</span> left, <span>int</span> top) {
        ImageIcon icon = <span>new</span> ImageIcon(src);
        <span>int</span> origWidth = icon.getIconWidth();
        <span>int</span> origHeight = icon.getIconHeight();
        <span>int</span>[] s = <span>new</span><span>int</span>[<span>2</span>];
        <span>if</span> (origWidth < origHeight) { <span>// 以宽为标准</span>
            s = getSize(origWidth, origHeight, width, height, <span>1</span>);
        } <span>else</span> {<span>// 以高为标准</span>
            s = getSize(origWidth, origHeight, width, height, <span>2</span>);
        }

        <span>if</span> (thumbnail(src, dst, s[<span>0</span>], s[<span>1</span>])) {
            <span>return</span> crop(src, dst, width, height, left, top);
        }
        <span>return</span><span>false</span>;
    }

    <span>/**
     * 加边框。
     *<span> @param</span> src 源图片
     *<span> @param</span> dst 目标图片
     *<span> @param</span> borderWidth 边框的宽度
     *<span> @param</span> borderHeight 边框的高度
     *<span> @param</span> borderColor 边框的颜色
     *<span> @return</span> 是否处理成功
     */</span><span>public</span><span>static</span><span>boolean</span><span>border</span>(String src, String dst, <span>int</span> borderWidth, <span>int</span> borderHeight, String borderColor) {
        <span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_CONVERT);
        cmdLine.addArgument(<span>"-bordercolor"</span>);
        cmdLine.addArgument(borderColor);
        cmdLine.addArgument(<span>"-border"</span>);
        cmdLine.addArgument(borderWidth + <span>"x"</span> + borderHeight);
        cmdLine.addArgument(src);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"加图片边框时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }

    <span>/**
     * 转换图片格式。
     *<span> @param</span> src 源图片
     *<span> @param</span> dst 目标图片
     *<span> @param</span> format 转换的格式
     *<span> @return</span> 是否处理成功
     */</span><span>public</span><span>static</span><span>boolean</span><span>format</span>(String src, String dst, String format) {
        <span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_CONVERT);
        cmdLine.addArgument(src);
        cmdLine.addArgument(<span>"-format"</span>);
        cmdLine.addArgument(<span>"'"</span> + format + <span>"'"</span>);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"转换图片格式时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }

    <span>/**
     * 转换无限极的TIFF图片。
     */</span><span>public</span><span>static</span><span>boolean</span><span>convertTiff</span>(String src, String dst) {        
     <span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_CONVERT);
        cmdLine.addArgument(src);
        cmdLine.addArgument(<span>"-colorspace"</span>);
        cmdLine.addArgument(<span>"RGB"</span>);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"转换图片格式时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }


    <span>/**
     * 获得要压缩图片的大小。
     *<span> @param</span> w 图片的原宽度
     *<span> @param</span> h 图片的原高度
     *<span> @param</span> width 标准宽
     *<span> @param</span> height 标准高
     *<span> @param</span> type 类型 1-以宽为标准压缩 2-以高为标准压缩 3-以比例大小压缩
     *<span> @return</span> size[0]-要压缩的宽度， size[1]-要压缩的高度
     */</span><span>public</span><span>static</span><span>int</span>[] <span>getSize</span>(<span>double</span> w, <span>double</span> h, <span>double</span> width, <span>double</span> height, <span>int</span> type) {
        <span>if</span> (w < width) {<span>// 如果原宽度比标准宽度小</span>
            width = w;
        }
        <span>if</span> (h < height) {<span>// 如果原高度比标准高度小</span>
            height = h;
        }
        <span>double</span> scale = w / h;
        <span>switch</span> (type) {
            <span>case</span><span>1</span>:
                height = width / scale;
                <span>break</span>;
            <span>case</span><span>2</span>:
                width = height * scale;
                <span>break</span>;
            <span>case</span><span>3</span>:
                <span>if</span> (width / height > scale) {
                    width = height * scale;
                } <span>else</span><span>if</span> ((width / height) < scale) {
                    height = width / scale;
                }
                <span>break</span>;
        }
        <span>int</span>[] size = <span>new</span><span>int</span>[<span>2</span>];
        size[<span>0</span>] = (<span>int</span>) width;
        size[<span>1</span>] = (<span>int</span>) height;
        <span>return</span> size;
    }


    <span>/**
     * 指定宽度。
     *<span> @param</span> src
     *<span> @param</span> width
     *<span> @param</span> dst
     */</span><span>public</span><span>static</span><span>boolean</span><span>resize</span>(String src, <span>int</span> width, String dst) {
        <span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_CONVERT);
        cmdLine.addArgument(src);
        cmdLine.addArgument(<span>"-resize"</span>);
        cmdLine.addArgument(width + <span>""</span>);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"缩略图片时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }

    <span>/**
     * 指定宽度、高度。
     *<span> @param</span> src
     *<span> @param</span> width
     *<span> @param</span> dst
     */</span><span>public</span><span>static</span><span>boolean</span><span>resizeWH</span>(String src,String dst, <span>int</span> width, <span>int</span> height ) {
        <span>// 构建命令</span>
        CommandLine cmdLine = <span>new</span> CommandLine(EXECUTABLE_CONVERT);
        cmdLine.addArgument(src);
        cmdLine.addArgument(<span>"-resize"</span>);
        cmdLine.addArgument(width + <span>"x"</span> + height +<span>"!"</span>);
        cmdLine.addArgument(dst);

        <span>try</span> {
            executeCommandLine(cmdLine);
            <span>return</span><span>true</span>;
        } <span>catch</span> (Exception e) {
            LOG.error(<span>"缩略图片时发生异常，Cause: "</span>, e);
            <span>return</span><span>false</span>;
        }
    }
}
</code>