百度手写签名修改

eladmin-system/src/main/java/me/zhengjie/base/util/baidu/Base64Util.java

@@ -0,0 +1,77 @@
+package me.zhengjie.base.util.baidu;
+
+import java.util.Base64;
+
+/**
+ * Base64 工具类
+ */
+public class Base64Util {
+    private static final char last2byte = (char) Integer.parseInt("00000011", 2);
+    private static final char last4byte = (char) Integer.parseInt("00001111", 2);
+    private static final char last6byte = (char) Integer.parseInt("00111111", 2);
+    private static final char lead6byte = (char) Integer.parseInt("11111100", 2);
+    private static final char lead4byte = (char) Integer.parseInt("11110000", 2);
+    private static final char lead2byte = (char) Integer.parseInt("11000000", 2);
+    private static final char[] encodeTable = new char[]{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'};
+
+    public Base64Util() {
+    }
+
+    public static String encode(byte[] from) {
+        StringBuilder to = new StringBuilder((int) ((double) from.length * 1.34D) + 3);
+        int num = 0;
+        char currentByte = 0;
+
+        int i;
+        for (i = 0; i < from.length; ++i) {
+            for (num %= 8; num < 8; num += 6) {
+                switch (num) {
+                    case 0:
+                        currentByte = (char) (from[i] & lead6byte);
+                        currentByte = (char) (currentByte >>> 2);
+                    case 1:
+                    case 3:
+                    case 5:
+                    default:
+                        break;
+                    case 2:
+                        currentByte = (char) (from[i] & last6byte);
+                        break;
+                    case 4:
+                        currentByte = (char) (from[i] & last4byte);
+                        currentByte = (char) (currentByte << 2);
+                        if (i + 1 < from.length) {
+                            currentByte = (char) (currentByte | (from[i + 1] & lead2byte) >>> 6);
+                        }
+                        break;
+                    case 6:
+                        currentByte = (char) (from[i] & last2byte);
+                        currentByte = (char) (currentByte << 4);
+                        if (i + 1 < from.length) {
+                            currentByte = (char) (currentByte | (from[i + 1] & lead4byte) >>> 4);
+                        }
+                }
+
+                to.append(encodeTable[currentByte]);
+            }
+        }
+
+        if (to.length() % 4 != 0) {
+            for (i = 4 - to.length() % 4; i > 0; --i) {
+                to.append("=");
+            }
+        }
+
+        return to.toString();
+    }
+
+    public static byte[] base64ToByteArray(String base64) {
+        byte[] buffer;
+        try {
+            buffer = Base64.getDecoder().decode(base64);
+            return buffer;
+        } catch (Exception e) {
+            throw new RuntimeException("base64字符串异常或地址异常\n" + e.getMessage());
+        }
+    }
+}

eladmin-system/src/main/java/me/zhengjie/base/util/baidu/FileUtil.java

@@ -0,0 +1,72 @@
+package me.zhengjie.base.util.baidu;
+
+import java.io.*;
+
+/**
+ * 文件读取工具类
+ */
+public class FileUtil {
+
+    /**
+     * 读取文件内容，作为字符串返回
+     */
+    public static String readFileAsString(String filePath) throws IOException {
+        File file = new File(filePath);
+        if (!file.exists()) {
+            throw new FileNotFoundException(filePath);
+        } 
+
+        if (file.length() > 1024 * 1024 * 1024) {
+            throw new IOException("File is too large");
+        } 
+
+        StringBuilder sb = new StringBuilder((int) (file.length()));
+        // 创建字节输入流  
+        FileInputStream fis = new FileInputStream(filePath);  
+        // 创建一个长度为10240的Buffer
+        byte[] bbuf = new byte[10240];  
+        // 用于保存实际读取的字节数  
+        int hasRead = 0;  
+        while ( (hasRead = fis.read(bbuf)) > 0 ) {  
+            sb.append(new String(bbuf, 0, hasRead));  
+        }  
+        fis.close();  
+        return sb.toString();
+    }
+
+    /**
+     * 根据文件路径读取byte[] 数组
+     */
+    public static byte[] readFileByBytes(String filePath) throws IOException {
+        File file = new File(filePath);
+        if (!file.exists()) {
+            throw new FileNotFoundException(filePath);
+        } else {
+            ByteArrayOutputStream bos = new ByteArrayOutputStream((int) file.length());
+            BufferedInputStream in = null;
+
+            try {
+                in = new BufferedInputStream(new FileInputStream(file));
+                short bufSize = 1024;
+                byte[] buffer = new byte[bufSize];
+                int len1;
+                while (-1 != (len1 = in.read(buffer, 0, bufSize))) {
+                    bos.write(buffer, 0, len1);
+                }
+
+                byte[] var7 = bos.toByteArray();
+                return var7;
+            } finally {
+                try {
+                    if (in != null) {
+                        in.close();
+                    }
+                } catch (IOException var14) {
+                    var14.printStackTrace();
+                }
+
+                bos.close();
+            }
+        }
+    }
+}