新增:PDF文件生成图片的像素大小，dpi 越高，图片质量越清晰，同时也会消耗更多的计算资源。

server/src/main/config/application.properties

@@ -120,13 +120,13 @@ watermark.angle = ${WATERMARK_ANGLE:10}
 
 #Tif类型图片浏览模式：tif（利用前端js插件浏览）；jpg（转换为jpg后前端显示）；pdf（转换为pdf后显示，便于打印）
 tif.preview.type = ${KK_TIF_PREVIEW_TYPE:tif}
-
 # 备案信息
-BeiAn = 
+BeiAn =
 #禁止上传类型
 prohibit =exe,dll,dat
 #删除密码
 sc.password =123456
-
-#删除 转换后OFFICE、CAD、TIFF、压缩包源文件 默认开启 节约磁盘空间 
+#删除 转换后OFFICE、CAD、TIFF、压缩包源文件 默认开启 节约磁盘空间
 delete.source.file = true
+配置PDF文件生成图片的像素大小，dpi 越高，图片质量越清晰，同时也会消耗更多的计算资源。
+pdf2jpg.dpi = 105

server/src/main/java/cn/keking/config/ConfigConstants.java

@@ -46,6 +46,7 @@ public class ConfigConstants {
     private static String[] prohibit= {};
     private static String size;
     private static String password;
+    private static int pdf2JpgDpi;
     private static Boolean deletesourcefile;
 
     public static final String DEFAULT_CACHE_ENABLED = "true";
@@ -71,6 +72,7 @@ public class ConfigConstants {
     public static final String DEFAULT_size_DISABLE = "500MB";
     public static final String DEFAULT_prohibit_DISABLE = "exe,dll";
     public static final String DEFAULT_password_DISABLE = "123456";
+    public static final String DEFAULT_PDF2_JPG_DPI_SIZE_DISABLE = "105";
     public static final String DEFAULT_Delete_Source_File_PREVIEW_TYPE = "true";
 
     public static Boolean isCacheEnabled() {
@@ -408,6 +410,19 @@ public class ConfigConstants {
         ConfigConstants.password = password;
     }
 
+
+    public static int getpdf2JpgDpi() {
+        return pdf2JpgDpi;
+    }
+    @Value("${pdf.picture.size:105}")
+    public void pdf2JpgDpi(int pdf2JpgDpi) {
+        setpdf2JpgDpiValue(pdf2JpgDpi);
+    }
+    public static void setpdf2JpgDpiValue(int pdf2JpgDpi) {
+        ConfigConstants.pdf2JpgDpi = pdf2JpgDpi;
+    }
+
+
     public static Boolean getdeletesourcefile() {
         return deletesourcefile;
     }

server/src/main/java/cn/keking/config/ConfigRefreshComponent.java

@@ -58,6 +58,7 @@ public class ConfigRefreshComponent {
                 String BeiAn;
                 String size;
                 String password;
+                int pdf2JpgDpi;
                 Boolean deletesourcefile;
                 while (true) {
                     FileReader fileReader = new FileReader(configFilePath);
@@ -87,6 +88,7 @@ public class ConfigRefreshComponent {
                     BeiAn = properties.getProperty("BeiAn", ConfigConstants.DEFAULT_BeiAn_DISABLE);
                     prohibit = properties.getProperty("prohibit", ConfigConstants.DEFAULT_prohibit_DISABLE);
                     password = properties.getProperty("sc.password", ConfigConstants.DEFAULT_password_DISABLE);
+                    pdf2JpgDpi = Integer.parseInt(properties.getProperty("pdf2jpg.dpi", ConfigConstants.DEFAULT_PDF2_JPG_DPI_SIZE_DISABLE));
                     deletesourcefile =  Boolean.parseBoolean(properties.getProperty("delete.source.file", ConfigConstants.DEFAULT_Delete_Source_File_PREVIEW_TYPE));
                     prohibitArray = prohibit.split(",");
 
@@ -111,6 +113,7 @@ public class ConfigRefreshComponent {
                     ConfigConstants.setsizeValue(size);
                     ConfigConstants.setprohibitValue(prohibitArray);
                     ConfigConstants.setpasswordValue(password);
+                    ConfigConstants.setpdf2JpgDpiValue(pdf2JpgDpi);
                     ConfigConstants.setdeletesourcefileValue(deletesourcefile);
                     setWatermarkConfig(properties);
                     bufferedReader.close();

server/src/main/java/cn/keking/service/FileHandlerService.java

@@ -8,6 +8,7 @@ import cn.keking.service.cache.NotResourceCache;
 import cn.keking.utils.EncodingDetects;
 import cn.keking.utils.KkFileUtils;
 import cn.keking.utils.WebUtils;
+import cn.keking.web.filter.BaseUrlFilter;
 import com.aspose.cad.CodePages;
 import com.aspose.cad.Color;
 import com.aspose.cad.Image;
@@ -28,8 +29,6 @@ import org.springframework.util.StringUtils;
 import javax.servlet.http.HttpServletRequest;
 import java.awt.image.BufferedImage;
 import java.io.*;
-import java.net.URL;
-import java.net.URLDecoder;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
@@ -248,8 +247,8 @@ public class FileHandlerService {
             String imageFilePath;
             for (int pageIndex = 0; pageIndex < pageCount; pageIndex++) {
                 imageFilePath = folder + File.separator + pageIndex + pdf2jpg_image_format;
-                BufferedImage image = pdfRenderer.renderImageWithDPI(pageIndex, 105, ImageType.RGB);
-                ImageIOUtil.writeImage(image, imageFilePath, 105);
+                BufferedImage image = pdfRenderer.renderImageWithDPI(pageIndex, ConfigConstants.getpdf2JpgDpi(), ImageType.RGB);
+                ImageIOUtil.writeImage(image, imageFilePath, ConfigConstants.getpdf2JpgDpi());
                 String imageUrl = this.getPdf2jpgUrl(pdfName, pageIndex);
                 imageUrls.add(imageUrl);
             }
@@ -298,6 +297,16 @@ public class FileHandlerService {
         }
         return false;
     }
+    /**
+     *
+     * @param str 原字符串（待截取原串）
+     * @param posStr 指定字符串
+     * @return 截取截取指定字符串之后的数据
+     */
+    public static String getSubString(String str, String posStr){
+        return str.substring(str.indexOf(posStr) + posStr.length());
+    }
+
 
     /**
      * 获取文件属性
@@ -311,14 +320,6 @@ public class FileHandlerService {
         FileType type;
         String fileName;
         String fullFileName = WebUtils.getUrlParameterReg(url, "fullfilename");
-        String urlStrr = null;
-        URL urll;
-        try {
-            urll = new URL(url);
-            urlStrr = URLDecoder.decode(urll.getPath(), "UTF-8");
-        } catch (Exception e) {
-
-        }
         if (StringUtils.hasText(fullFileName)) {
             fileName = fullFileName;
             type = FileType.typeFromFileName(fullFileName);