转义工具类

blade-common/src/main/java/org/springblade/common/utils/SafeURLEncoder.java

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+package org.springblade.common.utils;
+
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+
+public class SafeURLEncoder {
+
+
+    public static String encodeFullUrl(String fullUrl) {
+        if (fullUrl == null || fullUrl.isEmpty()) {
+            return fullUrl;
+        }
+
+        // 查找最后一个斜杠位置
+        int lastSlashIndex = fullUrl.lastIndexOf('/');
+
+        // 如果没有斜杠，直接返回原URL
+        if (lastSlashIndex == -1) {
+            return fullUrl;
+        }
+
+        // 分割URL为基本部分和文件名
+        String baseUrl = fullUrl.substring(0, lastSlashIndex + 1);
+        String fileName = fullUrl.substring(lastSlashIndex + 1);
+
+        // 只对文件名进行安全编码
+        String safeFileName = encodeURLComponent(fileName);
+
+        // 重新组合URL
+        return baseUrl + safeFileName;
+    }
+
+
+    private static String encodeURLComponent(String input) {
+        if (input == null || input.isEmpty()) {
+            return input;
+        }
+
+        // 检查是否只包含安全字符
+        if (isSafeString(input)) {
+            return input;
+        }
+
+        // 需要编码的特殊处理
+        return encodeSpecial(input);
+    }
+
+
+    private static boolean isSafeString(String input) {
+        for (int i = 0; i < input.length(); i++) {
+            char c = input.charAt(i);
+            if (!isSafeCharacter(c)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+
+    private static boolean isSafeCharacter(char c) {
+        return (c >= 'a' && c <= 'z') ||
+                (c >= 'A' && c <= 'Z') ||
+                (c >= '0' && c <= '9') ||
+                c == '-' || c == '_' || c == '.' ||
+                c == '~' || c == '*';
+    }
+
+
+    private static String encodeSpecial(String input) {
+        try {
+            // 首先处理百分号（防止双重编码）
+            String percentFixed = input.replace("%", "%25");
+
+            // 执行URL编码
+            String encoded = URLEncoder.encode(percentFixed, StandardCharsets.UTF_8.name());
+
+            // 处理空格和修复双重编码问题
+            return encoded.replace("+", "%20")
+                    .replace("%2525", "%25");
+        } catch (Exception e) {
+            return input; // 出错时返回原始输入
+        }
+    }
+
+    // 测试用例
+    public static void main(String[] args) {
+        // 需要编码的复杂URL
+        String complexUrl = "https://xinan1.zos.ctyun.cn/huazheng2021/folderFile/8035ed7caee244a09c93fb731fd2/27e5af52344e4f0baf4b0e5d53eb1406/54.G7522天峨至北海公路（平塘至天峨广西段）№1合同段碎石垫层、4%水泥稳定碎石底基层、5%水泥稳定碎石基层.pdf";
+        System.out.println("编码后的URL: " + encodeFullUrl(complexUrl));
+
+        // 不需要编码的简单URL
+        String safeUrl = "https://example.com/reports/annual_report_2025.pdf";
+        System.out.println("安全URL: " + encodeFullUrl(safeUrl));
+
+        // 带有空格的URL
+        String withSpace = "https://example.com/reports/Q1 financial report.docx";
+        System.out.println("带空格URL: " + encodeFullUrl(withSpace));
+
+        // 只有基础URL没有文件名
+        String baseOnly = "https://example.com/downloads/";
+        System.out.println("只有基础URL: " + encodeFullUrl(baseOnly));
+
+        // 没有斜杠的URL
+        String noSlash = "downloads/annual-report.pdf";
+        System.out.println("没有斜杠: " + encodeFullUrl(noSlash));
+    }
+}