无法使用java将byte []插入MySQL [英] Can't insert byte[] into MySQL using java

问题描述

以下是我使用的代码：

byte[] bkey = key.getEncoded();
String query = "INSERT INTO keytable (name, key) VALUES (?,?)";
PreparedStatement pstmt = (PreparedStatement) connection.prepareStatement(query);
pstmt.setString(1, "test");
pstmt.setBytes(2, bkey);
pstmt.execute();

以下是我收到的错误：

com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key) VALUES ('test',_binary'?ʾ??s??u\'?}p?u')' at line 1

我有MySQL 5.0.41和 mysql-connector-java-5.1。 7-bin.jar 作为JDBC库。
有人可以帮帮我吗？
提前致谢！

I have MySQL 5.0.41 and mysql-connector-java-5.1.7-bin.jar as JDBC library. Is anyone can help me out here? Thanks in advance!

推荐答案

问题是你的名为key的列是SQL中的保留字。用反引号围绕它，事情应该有效。更好的是，考虑将列重命名为不是SQL保留字的内容。我已经使用下面的代码证明了这一点：

The problem is that your column called "key" is a reserve word in SQL. Surround it with backticks and things should work. Better yet, consider renaming the column to something that is not a SQL reserve word. I've proven this out using the code below:

MySQL表：

create table keytable (name varchar(255) not null, `key` blob not null);

Java代码：

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class MySQLBlobInsert {

    public static void main(String[] args) {
        try {
            Class.forName("com.mysql.jdbc.Driver").newInstance();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        Connection conn = null;
        try {
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "password");
            byte[] bkey = "This is some binary stuff".getBytes();
            String query = "INSERT INTO keytable (name, `key`) VALUES (?,?)";
            PreparedStatement pstmt = conn.prepareStatement(query);
            pstmt.setString(1, "test");
            pstmt.setBytes(2, bkey);
            pstmt.execute();
        } catch (SQLException e) {
            throw new RuntimeException(e);
        } finally {
            if (conn != null) {
                try { conn.close(); } catch (SQLException e) {}
            }
        }
        System.out.println("done :)");
    }
}

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