1、zimg的安装部署
最开始的时候是下载zimg的源码安装的，由于zimg依赖项众多，没有安装成功，刚好那期间在学习docker，于是docker search zimg一下，惊奇的发现有zimg镜像。
镜像名：iknow0612/zimg
docker pull iknow0612/zimg
运行zimg的方法（开发用，没有该配置，简单的做了图片存储位置的映射，重启后上传的图片还在。docker的实例名称很重要，同一主机的docker容器间通信最好用--link，IP有时候不太稳定）
docker run -it -d -p 4869:4869 -v /home/liuzhijun/zimg/images:/zimg/bin/img --name guttv_zimg iknow0612/zimg sh app.sh
2、java客户端代码
package com.guttv.common.utils;import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.ProtocolException; import java.net.URL; import java.net.URLConnection; import java.util.List;import javax.servlet.http.HttpServletRequest;import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest;import com.google.gson.Gson; import com.guttv.common.utils.ZimgClient.ZimgResult;public class ZimgClient {public static String zimgUrl = "http://192.168.1.221:4869/";public static String zimgShareUrl = "http://192.168.1.221:4869/";public static String tmpPath = "/var/guttv/logs/tmp";protected Logger logger = LoggerFactory.getLogger(getClass());public static void main(String[] args) {// 从文件上传图片ZimgResult ret0 = new ZimgClient().uploadImg("/var/guttv/logs/tmp/gophercolor.png");System.out.println(ret0.isRet() + "\r\n" + ret0.getImageUrl());// 从URL上传图片ZimgResult ret = new ZimgClient().uploadImgFromUrl("http://creatives.ftchinese.com/ads/beijing/201509/20150914_cartier_33660.gif");System.out.println(ret.isRet() + "\r\n" + ret.getImageUrl());// Send("http://192.168.1.221:4869/upload",// "c:/4c422e03jw1ejoqm5ghm0j20nl0fb76x.jpg", "jpg"); }/*** 从页面提交图片，上传到zimg* * @param request* @param fileTag* @return*/public String uploadImgToZimg(HttpServletRequest request, String fileTag) {String imgUrl = "";MultipartHttpServletRequest mhs = (MultipartHttpServletRequest) request;List<MultipartFile> files = mhs.getFiles(fileTag);if (files != null && files.size() > 0) {// 上传到图片服务器MultipartFile f = files.get(0);if (f.getSize() == 0)return "";String tmpFileName = ZimgClient.tmpPath + "/"+ f.getOriginalFilename();// mkdir("./tmp")File tmp = new File(ZimgClient.tmpPath);tmp.mkdir();tmp = new File(tmpFileName);try {// tmp.delete(); f.transferTo(tmp);} catch (Exception e) {e.printStackTrace();}ZimgResult ret = this.uploadImg(tmpFileName);logger.debug(new Gson().toJson(ret));if (ret != null && ret.isRet())imgUrl = ret.getImageUrl();// 删除文件if (tmp != null) {tmp.setWritable(true);// try {// new FileOutputStream(tmp).close();// } catch (Exception e) {// e.printStackTrace();// }System.gc();// java'bug，must be gc before delete tmp.delete();}}return imgUrl;}/*** 指定文件名，上传到zimg* * @param fileName* @return*/public ZimgResult uploadImg(String fileName) {String ext = "jpeg";int inx = fileName.lastIndexOf(".");if (inx > 0)ext = fileName.substring(inx + 1);String resp = this.Send(ZimgClient.zimgUrl + "upload", fileName, ext);return new Gson().fromJson(resp, ZimgResult.class);}public ZimgResult uploadImgFromUrl(String url) {String resp = this.SendFromUrl(url);return new Gson().fromJson(resp, ZimgResult.class);}/*** 从指定的URL下载图片并上传到zimg服务器* * @param zimgUrl* @param imgUrl* @return*/protected String SendFromUrl(String imgUrl) {// 设置文件类型默认值String ext = "jpeg";String respXML = "";try {// 获得connection对象logger.debug("zimg server url:" + ZimgClient.zimgUrl);URL zimgUL = new URL(ZimgClient.zimgUrl);URLConnection zimgConnection = zimgUL.openConnection();zimgConnection.setReadTimeout(50000);zimgConnection.setConnectTimeout(25000);HttpURLConnection zimgUC = (HttpURLConnection) zimgConnection;// 设置HTTP协议的消息头logger.debug("zimg set header");zimgUC.setRequestMethod("POST");zimgUC.setRequestProperty("Connection", "Keep-Alive");zimgUC.setRequestProperty("Cache-Control", "no-cache");zimgUC.setRequestProperty("Content-Type", ext.toLowerCase());// "jpeg");// zimgUC.setRequestProperty("COOKIE", "william");zimgUC.setDoOutput(true);zimgUC.setDoInput(true);logger.debug("zimg connect server.");// 与建立服务器连接 zimgUC.connect();// 设置传输模式为二进制logger.debug("zimg upload image in binary.");OutputStream om = zimgUC.getOutputStream();// 循环读取图片，发送到zimg服务器 ext = this.writeImage(imgUrl, om);logger.debug("image type=" + ext);// byte[] buf = new byte[8192];// while (true) {// int len = in.read(buf);// if (len <= 0)// break;// om.write(buf, 0, len);// }// 到开输入（返回信息）流InputStreamReader im = new InputStreamReader(zimgUC.getInputStream(), "UTF-8");// 循环读取，知道结束，获取返回信息logger.debug("zimg get response text.");char[] bb = new char[8192];while (true) {int length = im.read(bb);if (length == -1)break;char[] bc = new char[length];for (int i = 0; i < length; i++)bc[i] = bb[i];respXML += new String(bc);}logger.debug("zimg response:" + respXML);// 关闭上下行 im.close();zimgUC.disconnect();} catch (Exception e) {logger.debug("zimg exception :" + e.getMessage());e.printStackTrace();}return respXML;}/*** 返货图片类型* * @param data* @return*/protected String getImageType(byte[] data) {String type = null;// Png test:if (data[1] == 'P' && data[2] == 'N' && data[3] == 'G') {type = "PNG";return type;}// Gif test:if (data[0] == 'G' && data[1] == 'I' && data[2] == 'F') {type = "GIF";return type;}// JPG test:if (data[6] == 'J' && data[7] == 'F' && data[8] == 'I'&& data[9] == 'F') {type = "JPG";return type;}return type;}/*** 获取URL的输入流* * @param imgUrl* @return*/private String writeImage(String imgUrl, OutputStream om) {long totalBytes = 0;String imgType = "jpeg";try {// 获得connection对象URL imgUL = new URL(imgUrl);URLConnection imgConnection = imgUL.openConnection();imgConnection.setReadTimeout(50000);imgConnection.setConnectTimeout(25000);HttpURLConnection imgUC = (HttpURLConnection) imgConnection;// 设置HTTP协议的消息头logger.debug("set header");imgUC.setRequestMethod("GET");imgUC.setRequestProperty("Connection", "Keep-Alive");imgUC.setRequestProperty("Cache-Control", "no-cache");// imgUC.setRequestProperty("Content-Type", ext.toLowerCase());//// "jpeg");// imgUC.setRequestProperty("COOKIE", "GostLiu程序员老刘");imgUC.setDoOutput(true);imgUC.setDoInput(true);InputStream in = imgUC.getInputStream();byte[] buf = new byte[8192];boolean GotType = false;while (true) {int len = in.read(buf);if (len <= 0)break;if (!GotType) {imgType = this.getImageType(buf);GotType = true;}totalBytes += len;om.write(buf, 0, len);}in.close();} catch (Exception e) {// TODO Auto-generated catch block e.printStackTrace();return "";}if (totalBytes > 0)return imgType;elsereturn "";}/*** 将图片文件上传到zimg服务器* * @param url* @param fileName* @param ext* @return*/protected String Send(String url, String fileName, String ext) {if (ext.toLowerCase().compareTo("jpg") == 0)ext = "jpeg";String respXML = "";try {// 获得connection对象logger.debug("zimg server url:" + url);URL ul = new URL(url);URLConnection connection = ul.openConnection();connection.setReadTimeout(50000);connection.setConnectTimeout(25000);HttpURLConnection uc = (HttpURLConnection) connection;// 设置HTTP协议的消息头logger.debug("zimg set header");uc.setRequestMethod("POST");uc.setRequestProperty("Connection", "Keep-Alive");uc.setRequestProperty("Cache-Control", "no-cache");uc.setRequestProperty("Content-Type", ext.toLowerCase());// "jpeg");// uc.setRequestProperty("COOKIE", "william");uc.setDoOutput(true);uc.setDoInput(true);logger.debug("zimg connect server.");// 与建立服务器连接 uc.connect();// 设置传输模式为二进制logger.debug("zimg upload image in binary.");OutputStream om = uc.getOutputStream();// 循环读取图片，发送到zimg服务器FileInputStream in = new FileInputStream(fileName);byte[] buf = new byte[8192];while (true) {int len = in.read(buf);if (len <= 0)break;om.write(buf, 0, len);}// 到开输入（返回信息）流InputStreamReader im = new InputStreamReader(uc.getInputStream(),"UTF-8");// 循环读取，知道结束，获取返回信息logger.debug("zimg get response text.");char[] bb = new char[8192];while (true) {int length = im.read(bb);if (length == -1)break;char[] bc = new char[length];for (int i = 0; i < length; i++)bc[i] = bb[i];respXML += new String(bc);}logger.debug("zimg response:" + respXML);// 关闭上下行 im.close();uc.disconnect();} catch (Exception e) {logger.debug("zimg exception :" + e.getMessage());e.printStackTrace();}return respXML;}/********** zimg 服务器返回消息定义 ***********************************/public class ZimgError {private int code;private String message;public int getCode() {return code;}public void setCode(int code) {this.code = code;}public String getMessage() {return message;}public void setMessage(String message) {this.message = message;}}public class ZimgInfo {private String md5;public String getMd5() {return md5;}public void setMd5(String md5) {this.md5 = md5;}private int size;public int getSize() {return size;}public void setSize(int size) {this.size = size;}}public class ZimgResult {private boolean ret;private ZimgInfo info;private ZimgError error;public ZimgError getError() {return error;}public void setError(ZimgError error) {this.error = error;}public String getImageUrl() {if (this.isRet()) {return ZimgClient.zimgShareUrl + this.info.getMd5();}return "";}public boolean isRet() {return ret;}public void setRet(boolean ret) {this.ret = ret;}public ZimgInfo getInfo() {return info;}public void setInfo(ZimgInfo info) {this.info = info;}} }
3、用法
该类提供了三个用法：
a、从文件上传：
ZimgResult ret0 = new ZimgClient().uploadImg("/var/guttv/logs/tmp/gophercolor.png");
b、从url直接上传
ZimgResult ret = new ZimgClient().uploadImgFromUrl("http://creatives.ftchinese.com/ads/beijing/201509/20150914_cartier_33660.gif");
c、从页面提交上传，uploadImgToZimg
包含两个参数HttpServletRequest request和String fileTag，页面上要存在一个type是file类型的input标签，其name的值就是这里的fileTag，即下面例子中的posterFile。
本例中使用了spring的MultipartHttpServletRequest，因此调用者要支持spring。
String imgUrl = new ZimgClient().uploadImgToZimg(request,"posterFile");
