Initial commit

ruoyi-common/src/main/java/com/ruoyi/common/utils/file/FileUtils.java

@@ -0,0 +1,51 @@
+package com.ruoyi.common.utils.file;
+
+import cn.hutool.core.io.FileUtil;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * 文件处理工具类
+ *
+ * @author Lion Li
+ */
+public class FileUtils extends FileUtil {
+
+    /**
+     * 下载文件名重新编码
+     *
+     * @param response     响应对象
+     * @param realFileName 真实文件名
+     * @return
+     */
+    public static void setAttachmentResponseHeader(HttpServletResponse response, String realFileName) throws UnsupportedEncodingException {
+        String percentEncodedFileName = percentEncode(realFileName);
+
+        StringBuilder contentDispositionValue = new StringBuilder();
+        contentDispositionValue.append("attachment; filename=")
+                .append(percentEncodedFileName)
+                .append(";")
+                .append("filename*=")
+                .append("utf-8''")
+                .append(percentEncodedFileName);
+
+        response.addHeader("Access-Control-Allow-Origin", "*");
+        response.addHeader("Access-Control-Expose-Headers", "Content-Disposition,download-filename");
+        response.setHeader("Content-disposition", contentDispositionValue.toString());
+        response.setHeader("download-filename", percentEncodedFileName);
+    }
+
+    /**
+     * 百分号编码工具方法
+     *
+     * @param s 需要百分号编码的字符串
+     * @return 百分号编码后的字符串
+     */
+    public static String percentEncode(String s) throws UnsupportedEncodingException {
+        String encode = URLEncoder.encode(s, StandardCharsets.UTF_8.toString());
+        return encode.replaceAll("\\+", "%20");
+    }
+}