Question

我的代码不断出现错误。我正在为Neo4j创建一个简单的用户定义函数。谁能帮我这个？不管我尝试什么，我都会得到

Syntax Error: Insert "}" to complete block.

当我插入}时，它给我一个错误，指出我的代码“不可访问”，当我添加一个括号使其可访问时，它使我回到第一个错误并开始循环。

这是我的代码：

public class Join {


static Cipher cipher;

@UserFunction
@Description("example.DES ,, Decryption of any input values.")

public byte[] DES( @Name("set1") List<String> strings1) {

    for (int i = 0; i < strings1.size(); i++) {
        String dot;
        dot = strings1.get(i);

        KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
        keyGenerator.init(128);
        SecretKey secretKey = keyGenerator.generateKey();
        cipher = Cipher.getInstance("AES");


        String encryptedText = encrypt(dot, secretKey);
        System.out.println("Encrypted Text After Encryption: " + encryptedText);

    }


    public static String encrypt(String dot, SecretKey secretKey)
            throws Exception {
        byte[] plainTextByte = dot.getBytes();
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] encryptedByte = cipher.doFinal(plainTextByte);
        Base64.Encoder encoder = Base64.getEncoder();
        String encryptedText = encoder.encodeToString(encryptedByte);
        return encryptedText;
    } 

    }

Answer 1

在开始使用}方法之前，即for循环结束之后，您需要放置一个public static String encrypt(String dot, SecretKey secretKey)。

Answer 2

您缺少结束符，您的代码无法运行，如果将其添加到错误的位置，则只会导致代码中出现更多问题。我建议按照以下方式使用一些东西：

编辑：根据我的猜测，我从未使用过Cipher，如果添加右括号不起作用，则很可能是代码本身存在错误，建议您仔细检查一下并检查是否有错误。

public class Join {


static Cipher cipher;

@UserFunction
@Description("example.DES ,, Decryption of any input values.")

public byte[] DES( @Name("set1") List<String> strings1) {

    for (int i = 0; i < strings1.size(); i++) {
        String dot;
        dot = strings1.get(i);

        KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
        keyGenerator.init(128);
        SecretKey secretKey = keyGenerator.generateKey();
        cipher = Cipher.getInstance("AES");


        String encryptedText = encrypt(dot, secretKey);
        System.out.println("Encrypted Text After Encryption: " + encryptedText);

    }


    public static String encrypt(String dot, SecretKey secretKey)
            throws Exception {
        byte[] plainTextByte = dot.getBytes();
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] encryptedByte = cipher.doFinal(plainTextByte);
        Base64.Encoder encoder = Base64.getEncoder();
        String encryptedText = encoder.encodeToString(encryptedByte);
        return encryptedText;
      } 

    }

  }

Answer 3

我可以看到缺少一个}来关闭类Join。始终尝试格式化代码以查看此问题。结果代码为：

public class Join {

static Cipher cipher;

@UserFunction
@Description("example.DES ,, Decryption of any input values.")

 public byte[] DES( @Name("set1") List<String> strings1) {

    for (int i = 0; i < strings1.size(); i++) {
        String dot;
        dot = strings1.get(i);

        KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
        keyGenerator.init(128);
        SecretKey secretKey = keyGenerator.generateKey();
        cipher = Cipher.getInstance("AES");


        String encryptedText = encrypt(dot, secretKey);
        System.out.println("Encrypted Text After Encryption: " + encryptedText);

    }

}

    public static String encrypt(String dot, SecretKey secretKey) throws Exception {
        byte[] plainTextByte = dot.getBytes();
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] encryptedByte = cipher.doFinal(plainTextByte);
        Base64.Encoder encoder = Base64.getEncoder();
        String encryptedText = encoder.encodeToString(encryptedByte);
        return encryptedText;
    } 

   }

Answer 4

您必须在加密方法之前放置一个'{'，以结束forloop。

 public class Join {
        static Cipher cipher;

        @UserFunction
        @Description("example.DES ,, Decryption of any input values.")

        public byte[] DES( @Name("set1") List<String> strings1) {

            for (int i = 0; i < strings1.size(); i++) {
                String dot;
                dot = strings1.get(i);

                KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
                keyGenerator.init(128);
                SecretKey secretKey = keyGenerator.generateKey();
                cipher = Cipher.getInstance("AES");


                String encryptedText = encrypt(dot, secretKey);
                System.out.println("Encrypted Text After Encryption: " + encryptedText);

            }
    }

            public static String encrypt(String dot, SecretKey secretKey)
                    throws Exception {
                byte[] plainTextByte = dot.getBytes();
                cipher.init(Cipher.ENCRYPT_MODE, secretKey);
                byte[] encryptedByte = cipher.doFinal(plainTextByte);
                Base64.Encoder encoder = Base64.getEncoder();
                String encryptedText = encoder.encodeToString(encryptedByte);
                return encryptedText;
            } 


        }

我如何修复语法错误插入'}'来完成块

4 个答案: