图片中心链接转换代码样例

PictureDTOAssembler.java

import java.io.IOException;


import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.Validate;
import org.apache.commons.lang.math.NumberUtils;
import org.springframework.beans.factory.annotation.Autowired;
import static com.google.common.base.Preconditions.checkState;

/**
 * 用于图片管理的 DTO拼装
 */

public class PictureDTOAssembler {

    private final String urlPrefix;
    private final String waterPicUrl;
    
    private static final String IMGEXTRA_STRING = "/imgextra/";
    private static final String DEFAULT_LOGO_SRC = "http://img04.taobaocdn.com/tps/i4/T10FW9Xg8hXXXXXXXX-72-72.jpg";
    public  static final String DEFAULT_LOGO = "DEFAULT_LOGO";
    
    private final String DEFAULT_REGEX = "(i[1-8]/\\d{8}/\\p{ASCII}*.(jpg|gif|png|jpeg))|(i[1-8]/\\p{ASCII}*.(jpg|gif|png|jpeg))";
    

    
    @Autowired
    public PictureDTOAssembler(final String urlPrefix,
    		final String waterPicUrl) {
        this.urlPrefix = urlPrefix;
        this.waterPicUrl = waterPicUrl;
    }

    /**
     * 从短url转化等长url
     * @param internalUrl    i1/1011104097503/T1pHpcXglJXXXXXXXX_!!111-0-software.jpg
     * @return  externalUrl  
     */
    public String getExternalUrl(String internalUrl) {
    	Validate.notEmpty(internalUrl);
    	if(internalUrl.equals(DEFAULT_LOGO)){
    		return DEFAULT_LOGO_SRC;
    	}
    	Validate.isTrue(internalUrl.matches(DEFAULT_REGEX));
        String externalUrl = replaceUrlBrokerImgId(urlPrefix, internalUrl) + IMGEXTRA_STRING + internalUrl;

        return externalUrl;
    }
    
    /**
     * 从长url转化得到短url
     * @param externalUrl    http://img01.config-vip.taobaocdn.net/imgextra/i1/1011104097503/T1pHpcXglJXXXXXXXX_!!111-0-software.jpg
     * @return  InternalUrl  
     */
    public String getInternalUrl(String externalUrl) {
    	Validate.notEmpty(externalUrl);
    	if(externalUrl.equals(DEFAULT_LOGO_SRC)){
    		return DEFAULT_LOGO;
    	}
        String[] strList = externalUrl.split(IMGEXTRA_STRING);    
        checkState(strList != null && strList.length == 2);
        checkState(strList[1].matches(DEFAULT_REGEX));     
        return strList[1];
    }
    
    /**
     * 将AppPicSrc对象由长url转化为短url
     * @param picSrc
     * @return
     */
    public AppPicSrc getAppPicSrcInternalUrl(AppPicSrc picSrc){
    	 String newSrcString = "";
    	 if(picSrc == null || StringUtil.isBlank(picSrc.appPicSrcString())){
    		 return picSrc;
    	 }
         for (String src : picSrc.appPicSrcString().split(AppPicSrc.VALUE_SEPARATOR)){
         	String[] ss = src.split(AppPicSrc.Attribute_SEPARATOR);
         	String isMain = ss.length>1?ss[1]:"0";
             newSrcString += getInternalUrl(ss[0])+AppPicSrc.Attribute_SEPARATOR+isMain+ AppPicSrc.VALUE_SEPARATOR;
         }
         if (newSrcString.length() > 0){
             newSrcString = newSrcString.substring(0,newSrcString.length() - 1);
         }
        return new AppPicSrc(newSrcString);
    }
    
    /**
     * 将AppPicSrc对象由短url转化为长url
     * @param mutipleExternalUrl
     * @return
     */
    public AppPicSrc getAppPicSrcExternalUrl(AppPicSrc picSrc){
    	 String newSrcString = "";
    	 if(picSrc == null || StringUtil.isBlank(picSrc.appPicSrcString())){
    		 return picSrc;
    	 }
         for (String src : picSrc.appPicSrcString().split(AppPicSrc.VALUE_SEPARATOR)){
         	String[] ss = src.split(AppPicSrc.Attribute_SEPARATOR);
         	String isMain = ss.length>1?ss[1]:"0";
             newSrcString += getExternalUrl(ss[0])+AppPicSrc.Attribute_SEPARATOR+isMain+ AppPicSrc.VALUE_SEPARATOR;
         }
         if (newSrcString.length() > 0){
             newSrcString = newSrcString.substring(0,newSrcString.length() - 1);
         }
        return new AppPicSrc(newSrcString);
    }

    /**
     * 拼装  请求图片多媒体平台的 入参参数
     * @param pictureInputDTO
     * @return fileAddTO
     * @throws IOException
     */
    public FileAddTO fromDTO(PictureInputDTO pictureInputDTO){
        FileAddTO fileAddTO = new FileAddTO();   
        //fileAddTO.setInputStream(pictureInputDTO.getInputStream());
        fileAddTO.setFileData(pictureInputDTO.getFileData());
        fileAddTO.setUserId(pictureInputDTO.getUserId());
        fileAddTO.setDirId(0L);

        if(pictureInputDTO.isWaterString()){
         //打水印
        	  ImageFilter filter = ImageFilter.getInstance(pictureInputDTO.getFileData());
        	  if (filter != null){
      			ImageResult ir = filter.process(pictureInputDTO.getFileData(),ImageFilter.MODE_ALL_DATA);
      			int width = ir.getWidth();
      			int height = ir.getHeight();
      			if(width<=1000 && height<=1500){
      				 //目前1000*1500分辨率的应用才能打水印
	              	  WaterMarkDO waterMarkDO = new WaterMarkDO();
	            	  waterMarkDO.setImgUrl(waterPicUrl);
	                  fileAddTO.setWaterMark(waterMarkDO);  
	                  fileAddTO.setWaterMarkOn(FileConsts.WATER_MARK_IMG);
      			}
        	  }
        }
        
       if(pictureInputDTO.isCheck()){
    	   //图片压缩
           fileAddTO.setCompressRate(0.9);
           fileAddTO.setCompressType(FileConsts.COMPRESS_BY_SCALE);
       }
        
     
        
        fileAddTO.setName("name");

        return fileAddTO;
    }

    /**
     * 替换域名中的 数字
     * @param prefix
     * @param simplePicUrl
     * @return
     */
    private static String replaceUrlBrokerImgId(String prefix, String simplePicUrl){
        Integer imgID = NumberUtils.toInt(StringUtils.substring(simplePicUrl,1,2),0);
        String idString = "0" +imgID.toString();
        return prefix.replaceFirst("0x", idString);
    }
}