diff --git a/数据结构与算法/source code/securityAlgorithm/.classpath b/数据结构与算法/source code/securityAlgorithm/.classpath
index af1430be..0a1daddd 100644
--- a/数据结构与算法/source code/securityAlgorithm/.classpath	
+++ b/数据结构与算法/source code/securityAlgorithm/.classpath	
@@ -12,7 +12,7 @@
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
diff --git a/数据结构与算法/source code/securityAlgorithm/.settings/org.eclipse.jdt.core.prefs b/数据结构与算法/source code/securityAlgorithm/.settings/org.eclipse.jdt.core.prefs
index 714351ae..abec6ca3 100644
--- a/数据结构与算法/source code/securityAlgorithm/.settings/org.eclipse.jdt.core.prefs	
+++ b/数据结构与算法/source code/securityAlgorithm/.settings/org.eclipse.jdt.core.prefs	
@@ -1,5 +1,5 @@
 eclipse.preferences.version=1
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
-org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
+org.eclipse.jdt.core.compiler.compliance=1.5
 org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
-org.eclipse.jdt.core.compiler.source=1.8
+org.eclipse.jdt.core.compiler.source=1.5
diff --git a/数据结构与算法/source code/securityAlgorithm/src/main/java/com/snailclimb/ks/securityAlgorithm/DesDemo.java b/数据结构与算法/source code/securityAlgorithm/src/main/java/com/snailclimb/ks/securityAlgorithm/DesDemo.java
index cdea9be6..3339ea1c 100644
--- a/数据结构与算法/source code/securityAlgorithm/src/main/java/com/snailclimb/ks/securityAlgorithm/DesDemo.java	
+++ b/数据结构与算法/source code/securityAlgorithm/src/main/java/com/snailclimb/ks/securityAlgorithm/DesDemo.java	
@@ -27,7 +27,7 @@ public class DesDemo {
 		byte[] result;
 		try {
 			result = DesDemo.encrypt(str.getBytes(), password);
-			System.out.println("加密后：" + result);
+			System.out.println("加密后：" + new String(result));
 			byte[] decryResult = DesDemo.decrypt(result, password);
 			System.out.println("解密后：" + new String(decryResult));
 		} catch (UnsupportedEncodingException e2) {
diff --git a/数据结构与算法/source code/securityAlgorithm/src/main/java/com/snailclimb/ks/securityAlgorithm/RSADemo.java b/数据结构与算法/source code/securityAlgorithm/src/main/java/com/snailclimb/ks/securityAlgorithm/RSADemo.java
index 5234028e..c7ddf105 100644
--- a/数据结构与算法/source code/securityAlgorithm/src/main/java/com/snailclimb/ks/securityAlgorithm/RSADemo.java	
+++ b/数据结构与算法/source code/securityAlgorithm/src/main/java/com/snailclimb/ks/securityAlgorithm/RSADemo.java	
@@ -28,9 +28,9 @@ public class RSADemo {
 		System.out.println("-----------------------------------");
 		byte[] encryptByPrivateKey = encryptByPrivateKey("123456".getBytes(), privateKey);
 		byte[] encryptByPublicKey = encryptByPublicKey("123456", publicKey);
-		System.out.println(encryptByPrivateKey);
+		System.out.println(new String(encryptByPrivateKey));
 		System.out.println("-----------------------------------");
-		System.out.println(encryptByPublicKey);
+		System.out.println(new String(encryptByPublicKey));
 		System.out.println("-----------------------------------");
 		String sign = sign(encryptByPrivateKey, privateKey);
 		System.out.println(sign);
@@ -40,9 +40,9 @@ public class RSADemo {
 		System.out.println("-----------------------------------");
 		byte[] decryptByPublicKey = decryptByPublicKey(encryptByPrivateKey, publicKey);
 		byte[] decryptByPrivateKey = decryptByPrivateKey(encryptByPublicKey, privateKey);
-		System.out.println(decryptByPublicKey);
+		System.out.println(new String(decryptByPublicKey));
 		System.out.println("-----------------------------------");
-		System.out.println(decryptByPrivateKey);
+		System.out.println(new String(decryptByPrivateKey));
 
 	}