NginxX输出缩放图片的方法

本文实例为大家分享了NginxX输出缩放图片的具体代码，供大家参考，具体内容如下

nginx 配置文件：

# document ppt convert Configuration.

upstream document.polyv.net {

server 127.0.0.1:8080;

}

server {

listen 80;

server_name document.polyv.net;

index index.html index.htm;

charset utf-8;

client_max_body_size 1000m;

# ignore favicon.ico not exist.

location = /favicon.ico {

  log_not_found off;

  access_log off;

}

# not allow to visit hidden files.

location ~ /\. {

  deny all;

  access_log off;

  log_not_found off;

}

location / {

  if ($request_filename ~* ^.*?\.(txt|doc|pdf|rar|gz|zip|docx|exe|xlsx|ppt|pptx)$) {

   add_header Content-Disposition: ‘attachment;’;

   add_header Content-Type: ‘APPLICATION/OCTET-STREAM’;

  }

  proxy_pass http://document.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;

  # include proxy.conf;

  charset UTF-8;

}

# user upload files

location /images/ {

   #expires 7d;

  alias /data03/ovp/blobs/;

   proxy_store on;

   proxy_store_access user:rw group:rw all:rw;

   proxy_set_header Accept-Encoding “”;

   if ( !-f $request_filename ) {

    proxy_pass http://document.polyv.net;

   }

}

location /blobs/ {

   #expires 7d;

  alias /data03/ovp/blobs/;

}

  location /preview/images/ {

   #expires 7d;

   alias /data03/ovp/blobs/;

   proxy_store on;

   proxy_store_access user:rw group:rw all:rw;

   proxy_set_header Accept-Encoding “”;

   if ( !-f $request_filename ) {

    proxy_pass http://document.polyv.net;

   }

  }

}</pre>

</div>

<p>X输出缩放图片</p>

<div class=”jb51code”>

<pre class=”brush:java;”>

package com.document.handle.controller;

import java.io.BufferedInputStream;

import java.io.File;

import java.io.IOException;

import java.io.OutputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.ServletRequestUtils;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import com.document.tool.ImageMagickUtils;

import com.document.tool.SystemConfig;

@Controller

public class ImageAgentController {

private static final Logger LOG = LoggerFactory.getLogger(ImageAgentController.class);

/**

  * ppt预览图片X输出

  * @throws IOException

  */

@RequestMapping(“/preview/images/{year}/{month}/{md5id}/{preview}/{filename}.{ext}”)

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 = “/data03/ovp/blobs/”;

  String rootDir = SystemConfig.getBlobDirectory();

  String oname = filename.substring(1, filename.length());// 原图文件名

  String dirString = rootDir + year + “/” + month + “/” + md5id + “/” + oname + “.” + ext;

  String targetFileString = rootDir + year + “/” + month + “/” + md5id + “/preview/” + filename + “.” + ext;

  //如果原图存在

  File originImage = new File(oname);

  if(originImage.exists()){

   LOG.info(“corpImage…” + dirString + ” -> ” + targetFileString);

   File newfile = new File(targetFileString);

   String pathString = newfile.getParent();

   LOG.info(“pathString…{} {}”, pathString);

   File pathFile = new File(pathString);

   if (!pathFile.exists()) {

    LOG.info(“—create file—“);

    pathFile.mkdirs();

   }

   boolean status = ImageMagickUtils.scale(dirString, targetFileString, 240, 180);

   if (status) {

    response.reset();

    response.setContentType(“image/” + ext);

    java.io.InputStream in = new java.io.FileInputStream(targetFileString);

    // FilenameUrlUtils.getImageFilename(targetFileString);

    if (in != null) {

     byte[] b = new byte[1024];

     int len;

     while ((len = in.read(b)) != -1) {

      response.getOutputStream().write(b);

     }

     in.close();

    }

   }

  }else{

   LOG.info(“原图目录不存在-preview：{}”,dirString);

  }

}

/**

  * ppt固定尺寸图片X输出

  * @throws IOException

  * http://document.polyv.net/images/2022/03/de37d2ceb11ac068c18c5e4428541075/jpg-3/1000×540.png

  *

  * http://document.polyv.net/images/2022/03/de37d2ceb11ac068c18c5e4428541075/jpg-3.png

  */

@RequestMapping(“/images/{year}/{month}/{md5id}/{filename}/{width}x{height}.{ext}”)

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 = “/data03/ovp/blobs/”;

  String rootDir = SystemConfig.getBlobDirectory();

  //String oname = filename.substring(1, filename.length());// 原图文件名

  String dirString = rootDir + year + “/” + month + “/” + md5id + “/” + ( filename + “.” + ext);

  String targetFileString = rootDir + year + “/” + month + “/” + md5id + “/” + filename + “/” + (width + “x” + height + “.” + ext);

  //如果原图存在

  File originImage = new File(dirString);

  if(originImage.exists()){

   File targetFileStringFile = new File(targetFileString);

   if(!targetFileStringFile.exists()){

    LOG.info(“corpImage…” + dirString + ” -> ” + targetFileString);

    File newfile = new File(targetFileString);

    String pathString = newfile.getParent();

    LOG.info(“pathString…{} {}”, pathString);

    File pathFile = new File(pathString);

    if (!pathFile.exists()) {

     LOG.info(“—create file—“);

     pathFile.mkdirs();

    }

    ImageMagickUtils.resizeWH(dirString, targetFileString,width,height);

   }

   response.setContentType(“image/” + ext);

   java.io.InputStream in = null;

   try{

    in = new java.io.FileInputStream(targetFileString);

    response.setContentLength(in.available());

    byte[] buffer = new byte[1024];

    int count = 0;

    while ((count = in.read(buffer)) > 0) {

     response.getOutputStream().write(buffer, 0, count);

    }

    response.flushBuffer();

   }catch(Exception e){

    e.printStackTrace();

   }finally {

    try {

     in.close();

    } catch (Exception e) {

    }

   }

  }else{

   LOG.info(“原图目录不存在：{}”,dirString);

  }

}

/**

  * 图片下载

  */

@RequestMapping(“get/image/data”)

public void downloadImage(HttpServletRequest request, HttpServletResponse response) throws IOException {

  String filePath = ServletRequestUtils.getStringParameter(request, “filePath”, “”); //图片访问路劲

  String fileName = ServletRequestUtils.getStringParameter(request, “fileName”, “”); //名称

  if(StringUtils.isNotBlank(filePath) || StringUtils.isNotBlank(fileName)){

   String destUrl = filePath;

   //LOG.info(“————–“+filePath);

   String fileFormat=filePath.substring(filePath.lastIndexOf(“.”));

   //String name=fileName.trim()+fileFormat;

   String name=filePath.substring(filePath.lastIndexOf(“/”)+1, filePath.length());

   //File f = new File(filePath);

   //response.setHeader(“Content-Disposition”, “attachment; filename=”+java.net.URLEncoder.encode(f.getName(),”UTF-8”));

   //LOG.info(“————–“+f.getName());

   // 建立链接

   URL url = new URL(destUrl);

   HttpURLConnection httpUrl = (HttpURLConnection) url.openConnection();

   // 连接指定的资源

   httpUrl.connect();

   // 获取网络输入流

   BufferedInputStream bis = new BufferedInputStream(httpUrl.getInputStream());

   Integer lenf=httpUrl.getContentLength();

   //String lenf=this.getFileLength(4189053, 7189053);

   response.setContentType(“application/x-msdownload”);

   response.setHeader(“Content-Length”, lenf.toString());//文件大小值5几M

   response.setHeader(“Content-Disposition”, “attachment; filename=”+java.net.URLEncoder.encode(name,”UTF-8”));

   OutputStream out = response.getOutputStream();

   byte[] buf = new byte[1024];

   if (destUrl != null) {

    BufferedInputStream br = bis;

    int len = 0;

    while ((len = br.read(buf)) > 0){

     out.write(buf, 0, len);

    }     

    br.close();

   }

   out.flush();

   out.close();

  }

}

}图片缩放的业务

package com.document.tool;

import java.io.IOException;

import javax.swing.ImageIcon;

import org.apache.commons.exec.CommandLine;

import org.apache.commons.exec.DefaultExecuteResultHandler;

import org.apache.commons.exec.DefaultExecutor;

import org.apache.commons.exec.ExecuteException;

import org.apache.commons.exec.ExecuteWatchdog;

import org.apache.commons.exec.Executor;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

* 使用ImageMagick对图片文件进行处理的工具类。

* @author XingNing OU

*/

public abstract class ImageMagickUtils {

private static final String EXECUTABLE_CONVERT = “/usr/bin/convert”; // convert命令

private static final String EXECUTABLE_COMPOSITE = “/usr/bin/composite”; // composite命令

private static final long EXECUTE_TIMEOUT = 30 * 60 * 1000L; // 30 minutes

private static final Logger LOG = LoggerFactory.getLogger(ImageMagickUtils.class);

/**

  * 执行图片处理的命令。

  * @param cmdLine 待执行的命令

  * @return exitValue，一般等于0时表示正常运行结束

  * @throws ExecuteException 命令执行失败时抛出此异常

  * @throws IOException 当发生IO错误时抛出此异常

  * @throws InterruptedException 当等待异步返回结果被中断时抛出此异常

  */

public static int executeCommandLine(CommandLine cmdLine) throws ExecuteException, IOException,

InterruptedException {

  Executor executor = new DefaultExecutor();

  executor.setExitValue(0);

  // Kill a run-away process after EXECUTE_TIME milliseconds.

  ExecuteWatchdog watchdog = new ExecuteWatchdog(EXECUTE_TIMEOUT);

  executor.setWatchdog(watchdog);

  // Execute the print job asynchronously.

  DefaultExecuteResultHandler resultHandler = new DefaultExecuteResultHandler();

  executor.execute(cmdLine, resultHandler);

  // Some time later the result handler callback was invoked.

  resultHandler.waitFor();

  // So we can safely request the exit value.

  return resultHandler.getExitValue();

}

/**

  * 按照高宽比例缩小图片。

  * @param src 源图片

  * @param dst 目标图片

  * @param width 图片图片的宽度

  * @param height 目标图片的高度

  * @return 是否处理成功

  */

public static boolean scale(String src, String dst, int width, int height) {

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT);

  cmdLine.addArgument(src);

  cmdLine.addArgument(“-scale”);

  cmdLine.addArgument(width + “x” + height);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“缩略图片时发生异常，Cause: “, e);

   return false;

  }

}

/**

  * 按照高宽比例缩小图片。

  * @param src 源图片

  * @param dst 目标图片

  * @param width 图片图片的宽度

  * @param height 目标图片的高度

  * @return 是否处理成功

  */

public static boolean thumbnail(String src, String dst, int width, int height) {

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT);

  cmdLine.addArgument(src);

  cmdLine.addArgument(“-thumbnail”);

  cmdLine.addArgument(width + “x” + height);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“缩略图片时发生异常，Cause: “, e);

   return false;

  }

}

/**

  * 添加图片水印。

  * @param src 源图片

  * @param dst 目标图片

  * @param logofile 水印图片

  * @param dissolve 和水印的融合度,0-100的数字

  * @param gravity 叠放方向,East,West,North,South,NorthEast,NorthWest,SouthEast,SouthWest

  * @return 是否处理成功

  */

public static boolean drawLogo(String src, String dst, String logofile, int dissolve, String gravity) {

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_COMPOSITE);

  cmdLine.addArgument(“-dissolve”);

  cmdLine.addArgument(dissolve + “%”);

  cmdLine.addArgument(“-gravity”);

  cmdLine.addArgument(gravity);

  cmdLine.addArgument(logofile);

  cmdLine.addArgument(src);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“添加图片水印时发生异常，Cause: “, e);

   return false;

  }

}

/**

  * 添加图片水印。

  * @param src 源图片

  * @param dst 目标图片

  * @param logofile 水印图片

  * @param dissolve 和水印的融合度,0-100的数字

  * @param x 水印距离左下角的距离

  * @param y 水印距离右下角的距离

  * @return 是否处理成功

  */

public static boolean drawLogo(String src, String dst, String logofile, int dissolve, int x, int y) {

  ImageIcon icon = new ImageIcon(src);

  int width = icon.getIconWidth(); // 源图的宽

  int height = icon.getIconHeight(); // 源图的高

  String _x = String.valueOf(width – x); // 在x轴上水印图片的左上顶点距离图片左上角的距离

  String _y = String.valueOf(height – y); // 在y轴上水印图片的左上顶点距离图片左上角的距离

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_COMPOSITE);

  cmdLine.addArgument(“-dissolve”);

  cmdLine.addArgument(dissolve + “%”);

  cmdLine.addArgument(“-geometry”);

  cmdLine.addArgument(_x + “+” + _y);

  cmdLine.addArgument(logofile);

  cmdLine.addArgument(src);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“添加图片水印时发生异常，Cause: “, e);

   return false;

  }

}

/**

  * 裁剪图片。

  * @param src 源图片

  * @param dst 目标图片

  * @param width 目标宽度

  * @param height 目标高度

  * @param left 裁剪位置：距离左边的像素

  * @param top 裁剪位置：距离上边的像素

  * @return 是否处理成功

  */

public static boolean crop(String src, String dst, int width, int height, int left, int top) {

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT);

  cmdLine.addArgument(src);

  cmdLine.addArgument(“-crop”);

  cmdLine.addArgument(width + “x” + height + “+” + left + “+” + top);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“裁剪图片时发生异常，Cause: “, e);

   return false;

  }

}

/**

  * 获取矩形的小图。

  * @param src 源图片

  * @param dst 目标图片

  * @param width 目标宽度

  * @param height 目标高度

  * @param left 裁剪位置：距离左边的像素

  * @param top 裁剪位置：距离上边的像素

  * @return 是否处理成功

  */

public static boolean cropRect(String src, String dst, int width, int height, int left, int top) {

  ImageIcon icon = new ImageIcon(src);

  int origWidth = icon.getIconWidth();

  int origHeight = icon.getIconHeight();

  int[] s = new int[2];

  if (origWidth < origHeight) { // 以宽为标准

   s = getSize(origWidth, origHeight, width, height, 1);

  } else {// 以高为标准

   s = getSize(origWidth, origHeight, width, height, 2);

  }

  if (thumbnail(src, dst, s[0], s[1])) {

   return crop(src, dst, width, height, left, top);

  }

  return false;

}

/**

  * 加边框。

  * @param src 源图片

  * @param dst 目标图片

  * @param borderWidth 边框的宽度

  * @param borderHeight 边框的高度

  * @param borderColor 边框的颜色

  * @return 是否处理成功

  */

public static boolean border(String src, String dst, int borderWidth, int borderHeight, String borderColor) {

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT);

  cmdLine.addArgument(“-bordercolor”);

  cmdLine.addArgument(borderColor);

  cmdLine.addArgument(“-border”);

  cmdLine.addArgument(borderWidth + “x” + borderHeight);

  cmdLine.addArgument(src);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“加图片边框时发生异常，Cause: “, e);

   return false;

  }

}

/**

  * 转换图片格式。

  * @param src 源图片

  * @param dst 目标图片

  * @param format 转换的格式

  * @return 是否处理成功

  */

public static boolean format(String src, String dst, String format) {

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT);

  cmdLine.addArgument(src);

  cmdLine.addArgument(“-format”);

  cmdLine.addArgument(“‘” + format + “‘”);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“转换图片格式时发生异常，Cause: “, e);

   return false;

  }

}

/**

  * 转换无限极的TIFF图片。

  */

public static boolean convertTiff(String src, String dst) {  

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT);

  cmdLine.addArgument(src);

  cmdLine.addArgument(“-colorspace”);

  cmdLine.addArgument(“RGB”);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“转换图片格式时发生异常，Cause: “, e);

   return false;

  }

}

/**

  * 获得要压缩图片的大小。

  * @param w 图片的原宽度

  * @param h 图片的原高度

  * @param width 标准宽

  * @param height 标准高

  * @param 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

  * @return size[0]-要压缩的宽度， size[1]-要压缩的高度

  */

public static int[] getSize(double w, double h, double width, double height, int type) {

  if (w < width) {// 如果原宽度比标准宽度小

   width = w;

  }

  if (h < height) {// 如果原高度比标准高度小

   height = h;

  }

  double scale = w / h;

  switch (type) {

   case 1:

    height = width / scale;

    break;

   case 2:

    width = height * scale;

    break;

   case 3:

    if (width / height > scale) {

     width = height * scale;

    } else if ((width / height) < scale) {

     height = width / scale;

    }

    break;

  }

  int[] size = new int[2];

  size[0] = (int) width;

  size[1] = (int) height;

  return size;

}

/**

  * 指定宽度。

  * @param src

  * @param width

  * @param dst

  */

public static boolean resize(String src, int width, String dst) {

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT);

  cmdLine.addArgument(src);

  cmdLine.addArgument(“-resize”);

  cmdLine.addArgument(width + “”);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“缩略图片时发生异常，Cause: “, e);

   return false;

  }

}

/**

  * 指定宽度、高度。

  * @param src

  * @param width

  * @param dst

  */

public static boolean resizeWH(String src,String dst, int width, int height ) {

  // 构建命令

  CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT);

  cmdLine.addArgument(src);

  cmdLine.addArgument(“-resize”);

  cmdLine.addArgument(width + “x” + height +”!”);

  cmdLine.addArgument(dst);

  try {

   executeCommandLine(cmdLine);

   return true;

  } catch (Exception e) {

   LOG.error(“缩略图片时发生异常，Cause: “, e);

   return false;

  }

}

}服务器上要安装imagemagick。

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