How to convert base64 to blob in Java?

In Java, you can convert a Base64 string into a byte array using the parseBase64Binary() method of the javax.xml.bind.DatatypeConverter class, and then convert the byte array into a Blob object.

Here is an example code:

import javax.xml.bind.DatatypeConverter;
import java.sql.Blob;
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.PreparedStatement;

public class Main {
    public static void main(String[] args) {
        String base64String = "your_base64_string_here";
        
        // 将Base64字符串转换为字节数组
        byte[] byteArray = DatatypeConverter.parseBase64Binary(base64String);
        
        try {
            // 获取数据库连接
            Connection conn = getConnection();
            
            // 创建Blob对象
            Blob blob = conn.createBlob();
            
            // 将字节数组写入Blob对象
            blob.setBytes(1, byteArray);
            
            // 使用Blob对象进行其他操作，如将其存储到数据库中
            // ...
            
            // 关闭数据库连接
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
    
    private static Connection getConnection() throws SQLException {
        // 返回数据库连接
    }
}

Please replace “your_base64_string_here” with your Base64 string, and provide the method to getConnection() to establish a connection to the database according to your actual situation.