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How to connect navicat to javawebApr 24, 2024 pm 07:36 PM
mysqlnavicat

Steps to connect to Navicat in Java Web: Add MySQL driver Create connection properties Execute query

How to connect navicat to javaweb

How to connect in Java Web Navicat

Step 1: Add MySQL driver

  • In the IDE, right-click the project folder and select "Build Path" -> "Add External JARs".
  • Browse and select the MySQL driver jar file (usually located in the Navicat installation directory).

Step 2: Create connection properties

  • In Java code, create a Connection object:
DriverManager.getConnection("jdbc:mysql://localhost:3306/database_name", "username", "password");
  • Replace the following properties with your own MySQL database information:

    • localhost: Database server hostname or IP address
    • 3306: MySQL default port
    • database_name: The name of the database to be connected
    • username: MySQL user Name
    • password: MySQL password

##Step 3: Execute query

    Create a
  • Statement object to execute the query:
  • Statement statement = connection.createStatement();
    Write and execute the SQL query:
  • String query = "SELECT * FROM table_name";
    ResultSet resultSet = statement.executeQuery(query);
    Parse
  • ResultSet To get query results:
  • while (resultSet.next()) {
        // 获取列值并处理
    }

Sample code

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Main {

    public static void main(String[] args) {
        try {
            // 添加 MySQL 驱动器
            Class.forName("com.mysql.cj.jdbc.Driver");

            // 创建连接
            Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/database_name", "username", "password");

            // 执行查询
            Statement statement = connection.createStatement();
            String query = "SELECT * FROM table_name";
            ResultSet resultSet = statement.executeQuery(query);

            // 解析查询结果
            while (resultSet.next()) {
                System.out.println("ID: " + resultSet.getInt("id"));
            }

            // 关闭资源
            resultSet.close();
            statement.close();
            connection.close();
        } catch (SQLException | ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

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