修改实体位置

yzg-util-base/src/main/java/com/yanzuoguang/util/helper/RsaHelper.java

@@ -7,6 +7,7 @@ import org.slf4j.LoggerFactory;
 import org.springframework.util.Base64Utils;
 
 import javax.crypto.Cipher;
+import java.io.ByteArrayOutputStream;
 import java.security.*;
 import java.security.interfaces.RSAPrivateKey;
 import java.security.interfaces.RSAPublicKey;
@@ -27,6 +28,7 @@ public final class RsaHelper {
     private static final String ALGORITHM_SIGN = "MD5withRSA";
 
     private static final int KEYPAIR_LEN = 1024;
+    public static final int MAX_ENCRYPT_BLOCK = 64;
 
     private RsaHelper() {
         super();
@@ -100,10 +102,30 @@ public final class RsaHelper {
             PublicKey publicKey = getPublicKey(publicKeyStr);
             Cipher cipher = Cipher.getInstance(publicKey.getAlgorithm());
             cipher.init(Cipher.ENCRYPT_MODE, publicKey);
-            cipher.update(source.getBytes(SystemContants.UTF8));
-            byte[] bytes = cipher.doFinal();
-            String target = encodeBase64(bytes);
-            return target;
+
+            byte[] bytesFrom = source.getBytes(SystemContants.UTF8);
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+
+            int inputLen = bytesFrom.length;
+            int offSet = 0;
+            byte[] cache;
+            int i = 0;
+
+            // 对数据分段加密
+            while (inputLen - offSet > 0) {
+                if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
+                    cache = cipher.doFinal(bytesFrom, offSet, MAX_ENCRYPT_BLOCK);
+                } else {
+                    cache = cipher.doFinal(bytesFrom, offSet, inputLen - offSet);
+                }
+                out.write(cache, 0, cache.length);
+                i++;
+                offSet = i * MAX_ENCRYPT_BLOCK;
+            }
+            byte[] encryptedData = out.toByteArray();
+            out.close();
+
+            return encodeBase64(encryptedData);
         } catch (Exception ex) {
             throw new RuntimeException(ex);
         }