JDBC 插入记录

JDBC教程 - JDBC插入记录

以下代码显示如何将记录插入数据库表。

它使用 Statement 来执行硬编码的sql命令。

例子

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

public class Main {
  static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
  static final String DB_URL = "jdbc:mysql://localhost/STUDENTS";

  static final String USER = "username";
  static final String PASS = "password";

  public static void main(String[] args) throws Exception {
    Connection conn = null;
    Statement stmt = null;

    Class.forName(JDBC_DRIVER);
    conn = DriverManager.getConnection(DB_URL, USER, PASS);
    System.out.println("Deleting database...");
    stmt = conn.createStatement();

    conn = DriverManager.getConnection(DB_URL, USER, PASS);

    stmt = conn.createStatement();

    String sql = "INSERT INTO Person VALUES (1, "A", "B", 18)";
    stmt.executeUpdate(sql);
    sql = "INSERT INTO Person VALUES (2, "C", "D", 25)";
    stmt.executeUpdate(sql);
    sql = "INSERT INTO Person VALUES (3, "E", "F", 30)";
    stmt.executeUpdate(sql);
    sql = "INSERT INTO Person VALUES(4, "S", "M", 28)";
    stmt.executeUpdate(sql);
    stmt.close();
    conn.close();
  }
}

示例PreparedStatement

以下代码显示如何使用 PreparedStatement 插入记录。

它使用Oracle JDBC驱动程序。

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

public class Main {
  private static final String DB_DRIVER = "oracle.jdbc.driver.OracleDriver";
  private static final String DB_CONNECTION = "jdbc:oracle:thin:@localhost:1521:YourDatabase";
  private static final String DB_USER = "user";
  private static final String DB_PASSWORD = "password";

  public static void main(String[] argv) throws Exception {
    Connection dbConnection = null;
    PreparedStatement preparedStatement = null;
    Class.forName(DB_DRIVER);
    dbConnection = DriverManager.getConnection(DB_CONNECTION, DB_USER,
        DB_PASSWORD);

    String insertTableSQL = "INSERT INTO Person"
        + "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
        + "(?,?,?,?)";

    preparedStatement = dbConnection.prepareStatement(insertTableSQL);

    preparedStatement.setInt(1, 11);
    preparedStatement.setString(2, "yourName");
    preparedStatement.setString(3, "system");
    java.util.Date today = new java.util.Date();

    preparedStatement.setTimestamp(4,
        new java.sql.Timestamp(today.getTime()));

    preparedStatement.executeUpdate();

    preparedStatement.close();
    dbConnection.close();

  }
}