feat：增加兼容远程pdf下载

2025-03-28 13:31:45 +08:00
parent b018f819d1
commit 31734adb7e
2 changed files with 109 additions and 1 deletions
--- a/src/main/java/com/dpkj/modules/print/utils/PDFUtils.java
+++ b/src/main/java/com/dpkj/modules/print/utils/PDFUtils.java
@@ -0,0 +1,88 @@
+package com.dpkj.modules.print.utils;
+
+import com.dpkj.common.exception.RRException;
+import lombok.extern.slf4j.Slf4j;
+
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+
+@Slf4j
+public class PDFUtils {
+
+    private static final String defaultPath = "D:/images";
+
+    public enum AddressType {
+        HTTP,
+        LOCAL,
+        OTHER,
+        UNKNOWN
+    }
+
+    /**
+     * 校验地址类型
+     * @param address 地址
+     */
+    public static AddressType checkAddressType(String address) {
+        if (address == null || address.isEmpty()) {
+            return AddressType.UNKNOWN;
+        }
+
+        // 检查是否为 HTTP 或 HTTPS 地址
+        if (address.startsWith("http://") || address.startsWith("https://")) {
+            return AddressType.HTTP;
+        }
+
+        // 简单判断是否为本地地址
+        // 本地地址可能以文件协议 file:// 开头，或者是一个相对路径或绝对路径
+        if (address.startsWith("file://") ||
+                (address.contains(":") && address.contains("\\")) ||
+                (address.startsWith("/"))) {
+            return AddressType.LOCAL;
+        }
+
+        return AddressType.OTHER;
+    }
+
+    public static String downloadPdf(String pdfUrl) {
+        String savePath = defaultPath + "/genera_image_" + System.currentTimeMillis() + ".pdf";
+        try {
+            // 创建 URL 对象
+            URL url = new URL(pdfUrl);
+            // 打开 HTTP 连接
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            // 设置请求方法为 GET
+            connection.setRequestMethod("GET");
+
+            // 获取响应码
+            int responseCode = connection.getResponseCode();
+            if (responseCode == HttpURLConnection.HTTP_OK) {
+                // 获取输入流
+                try (InputStream inputStream = connection.getInputStream();
+                     // 创建文件输出流
+                     FileOutputStream outputStream = new FileOutputStream(savePath)) {
+
+                    byte[] buffer = new byte[4096];
+                    int bytesRead;
+                    // 循环读取数据并写入文件
+                    while ((bytesRead = inputStream.read(buffer)) != -1) {
+                        outputStream.write(buffer, 0, bytesRead);
+                    }
+                    log.info("PDF 文件下载成功，保存路径: " + savePath);
+                }
+            } else {
+                log.error("下载失败，响应码: " + responseCode);
+            }
+            // 断开连接
+            connection.disconnect();
+        }catch (Exception e) {
+            throw new RRException("PDF文件下载失败");
+        }
+
+        return savePath;
+    }
+
+
+}