How does Java database connection solve security issues?

Java database connection security solution: JDBC encryption: Use SSL/TLS connection to protect data transmission security. Connection pool: reuse connections, limit resource consumption, and prevent overuse. Restrict access: Grant applications only the minimum necessary permissions to prevent data leakage. Defense against SQL injection: Use parameterized queries and input validation to defend against malicious attacks.

Java database connection security solution

When connecting to a database in a Java application, it is crucial to ensure security. This article will Describes how to resolve this issue.

1. Encryption using JDBC

JDBC is Java’s API for interacting with databases. It offers several encryption options, including:

// 使用 SSL 连接
DriverManager.getConnection("jdbc:postgresql://localhost:5432/test?ssl=true", "user", "password");

// 使用 TLS 连接
DriverManager.getConnection("jdbc:postgresql://localhost:5432/test?sslMode=require", "user", "password");

2. Using a connection pool

A connection pool is a pre-created set of database connections that an application can use as needed Obtaining connections from it, the benefits include:

• Connection reuse, reducing the cost of creating new connections
• Connection limits, preventing excessive use of database resources

import org.apache.commons.dbcp2.BasicDataSource;
import org.apache.commons.dbcp2.BasicDataSourceFactory;

...

// 配置连接池
BasicDataSource dataSource = BasicDataSourceFactory.createDataSource(properties);

// 获取连接
Connection connection = dataSource.getConnection();

3. Restrict Access Permissions

Restricting database permissions to the lowest level required by the application, such as read-only or specific table access, can help prevent data leakage.

4. Defense against SQL Injection

SQL injection is an attack in which an attacker attempts to pass malicious SQL statements to the database. You can use the following methods for defense:

• Use parameterized queries
• Escape special characters
• Validate user input

Practical Case

The following is a practical case that demonstrates how to use JDBC encryption and connection pooling:

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.sql.Connection;
import java.sql.DriverManager;

...

// 从 properties 文件中读取数据库加密密钥
String password = new String(Cipher.getInstance("AES").decrypt(Base64.getDecoder().decode(properties.getProperty("password")))));

// 创建连接池
BasicDataSource dataSource = new BasicDataSource();
dataSource.setUrl("jdbc:postgresql://localhost:5432/test?ssl=true");
dataSource.setUsername("user");
dataSource.setPassword(password);

// 获取连接
Connection connection = dataSource.getConnection();

By following these best practices, the security of Java database connections can be greatly improved. , to prevent unauthorized access and data leakage.

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