[英]get a database connection in java
這是我的源代碼。
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.ResultSet;
public class DBConnect {
public static void main(String[] args) {
try {
String host = "jdbc:derby://localhost:1527/Employee";
String uName = "jayani";
String uPass = "jayani";
Connection con = DriverManager.getConnection(host, uName, uPass);
Statement stmt = con.createStatement();
String sql = "SELECT*FROM WORKERS";
ResultSet rs = stmt.executeQuery(sql);
while (rs.next()) {
int id_col = rs.getInt("ID");
String fname = rs.getString("FIRST_NAME");
String lname = rs.getString("LAST_NAME");
String job = rs.getString("JOB_TITLE");
System.out.println(id_col + "" + fname + "" + lname + "" + job);
}
} catch (SQLException ex) {
System.out.println(ex.getMessage());
}
}
}
在這里,我遇到了一個異常,例如“ executeQuery方法無法用於更新”。 什么是例外,我該如何解決。 謝謝。
您需要像這樣使用executeQuery
Statement stmt = null;
String query = "select * from <tablename>";
stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.