修复问题

yxt-common/yxt-common-base/src/main/java/com/yxt/common/base/utils/WordConvertUtils.java

@@ -10,8 +10,11 @@ import com.jacob.com.Dispatch;
 import freemarker.template.Configuration;
 import freemarker.template.Template;
 import freemarker.template.Version;
+import org.apache.pdfbox.io.MemoryUsageSetting;
+import org.apache.pdfbox.multipdf.PDFMergerUtility;
 
 import java.io.*;
+import java.util.List;
 import java.util.Map;
 
 /**
@@ -205,4 +208,28 @@ public class WordConvertUtils {
             return false;
         }
     }
+
+    /**
+     * pdf合并
+     *
+     * @param files      源文件的相对路径 例：["D:\anrui\upload\template\pdf\111.pdf","D:\anrui\upload\template\222.pdf"]
+     * @param targetPath 输出的pdf的路径 D:\anrui\upload\template\pdf\333.pdf
+     * @return
+     * @throws Exception
+     */
+    public static File mulFile2One(List<File> files, String targetPath) throws Exception {
+        PDFMergerUtility mergePdf = new PDFMergerUtility();
+        for (File f : files) {
+            if (f.exists() && f.isFile()) {
+                // 循环添加要合并的pdf
+                mergePdf.addSource(f);
+            }
+        }
+        // 设置合并生成pdf文件名称
+        mergePdf.setDestinationFileName(targetPath);
+        // 合并pdf
+        mergePdf.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
+        //ToDo:根据需求实现是否要删除源文件
+        return new File(targetPath);
+    }
 }