diff --git a/content/docs/API/HRO签名DEMO.md b/content/docs/API/HRO签名DEMO.md
new file mode 100644
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+# HRO签名DEMO
+
+
+```java
+import org.junit.Test;
+
+import java.io.UnsupportedEncodingException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Base64;
+
+/**
+ * @Author: Alawn
+ * @Description:
+ * @Date: Create in 6:40 下午 2021/1/20
+ */
+public class SignDemo {
+
+    private final static String secret = "Giur9quiuD";
+    private final static String charSet = "UTF-8";
+
+    @Test
+    public void sign() throws NoSuchAlgorithmException, UnsupportedEncodingException {
+        String reqBody = "<root><head><version>v1.0</version><serviceName>diskApply</serviceName><requestId>20210104000000000001</requestId><requestTime>20200104235959</requestTime></head><body><applyDate>20201229</applyDate><diskNo>20201229000000000000000000000001</diskNo><filePath>/data/send/20201229000000000000000000000001</filePath><fileVersion>v1</fileVersion><customerId>OHJEMIA1EINGUGAH0AITHOHNUEYAHWOO</customerId><titleId>1000001</titleId><md5>c5950a259435d3e51262539a10a22910</md5></body></root>";
+
+        MessageDigest md5Digest = MessageDigest.getInstance("MD5");
+
+        String md5 = byteArrayToHexString(md5Digest.digest(reqBody.getBytes(charSet)));
+
+        MessageDigest shaDigest = MessageDigest.getInstance("SHA-256");
+
+        byte[] signBuf = new byte[md5.getBytes(charSet).length + secret.getBytes(charSet).length];
+
+        System.arraycopy(md5.getBytes(charSet),0,signBuf,0,md5.getBytes(charSet).length);
+
+        System.arraycopy(secret.getBytes(charSet),0,signBuf,0,secret.getBytes(charSet).length);
+
+        String sign = String.valueOf(Base64.getEncoder().encodeToString(shaDigest.digest(signBuf)));
+
+        System.out.println("Sign:[" + sign + "]");
+    }
+
+    @Test
+    public void verifySign() throws NoSuchAlgorithmException, UnsupportedEncodingException {
+
+        String respBody = "<head><respCode>000000</respCode><respMessage>交易成功</respMessage><respTime>20210104235959</respTime></head>";
+        String respSign = "PcPrQVDIsguzP6ASffQM2zFtznHqi7Bz1RhZhALMnTs=";
+
+
+        MessageDigest md5Digest = MessageDigest.getInstance("MD5");
+
+        String md5 = byteArrayToHexString(md5Digest.digest(respBody.getBytes(charSet)));
+
+        MessageDigest shaDigest = MessageDigest.getInstance("SHA-256");
+
+        byte[] signBuf = new byte[md5.getBytes(charSet).length + secret.getBytes(charSet).length];
+
+        System.arraycopy(md5.getBytes(charSet), 0, signBuf, 0, md5.getBytes(charSet).length);
+
+        System.arraycopy(secret.getBytes(charSet), 0, signBuf, 0, secret.getBytes(charSet).length);
+
+        String sign = Base64.getEncoder().encodeToString(shaDigest.digest(signBuf));
+
+        if (!respSign.equals(sign)) {
+            System.out.println("验签失败；请求签名:[" + respSign + "] 验证签名: [" + sign + "]");
+        }
+        else{
+            System.out.println("验签成功");
+        }
+
+    }
+
+    public static String byteArrayToHexString(byte b[]) {
+        StringBuffer resultSb = new StringBuffer();
+        for (int i = 0; i < b.length; i++) {
+            resultSb.append(byteToHexString(b[i]));
+        }
+
+        return resultSb.toString();
+    }
+
+    private static String byteToHexString(byte b) {
+        int n = b;
+        if (n < 0) {
+            n += 256;
+        }
+        int d1 = n / 16;
+        int d2 = n % 16;
+        return hexDigits[d1] + hexDigits[d2];
+    }
+
+    private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
+            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
+
+}
+```
diff --git a/content/docs/API/文件压缩解压.md b/content/docs/API/文件压缩解压.md
new file mode 100644
index 0000000..97fc0e5
--- /dev/null
+++ b/content/docs/API/文件压缩解压.md
@@ -0,0 +1,40 @@
+# 文件压缩/解压
+
+## Maven配置
+
+```xml
+<dependency>
+    <groupId>net.lingala.zip4j</groupId>
+    <artifactId>zip4j</artifactId>
+    <version>2.6.4</version>
+</dependency>
+```
+
+## 压缩
+
+```java
+ZipParameters zipParameters = new ZipParameters();
+zipParameters.setEncryptFiles(true);
+zipParameters.setEncryptionMethod(EncryptionMethod.AES);
+// Below line is optional. AES 256 is used by default. You can override it to use AES 128. AES 192 is supported only for extracting.
+zipParameters.setAesKeyStrength(AesKeyStrength.KEY_STRENGTH_256); 
+
+List<File> filesToAdd = Arrays.asList(
+    new File("somefile"), 
+    new File("someotherfile")
+);
+
+ZipFile zipFile = new ZipFile("filename.zip", "password".toCharArray());
+zipFile.addFiles(filesToAdd, zipParameters);
+```
+
+
+## 解压
+
+```java
+new ZipFile("filename.zip", "password".toCharArray()).extractAll("/destination_directory");
+```
+
+## 参考
+
+[zip4j](https://github.com/srikanth-lingala/zip4j)