72 lines
3.2 KiB
Java
72 lines
3.2 KiB
Java
import java.sql.*;
|
|
|
|
public class TestDBConnection {
|
|
public static void main(String[] args) {
|
|
System.out.println("Testing database connection...");
|
|
|
|
try {
|
|
// Load MySQL driver explicitly
|
|
System.out.println("Loading MySQL driver...");
|
|
Class.forName("com.mysql.cj.jdbc.Driver");
|
|
System.out.println("MySQL driver loaded successfully!");
|
|
|
|
// Test 1: Connect to MySQL server without specifying database
|
|
String url = "jdbc:mysql://localhost:3306/?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8&allowPublicKeyRetrieval=true";
|
|
String username = "root";
|
|
String password = "123456";
|
|
|
|
System.out.println("Connecting to MySQL server...");
|
|
Connection conn = DriverManager.getConnection(url, username, password);
|
|
System.out.println("Connected to MySQL server successfully!");
|
|
|
|
// Test 2: List all databases
|
|
Statement stmt = conn.createStatement();
|
|
ResultSet rs = stmt.executeQuery("SHOW DATABASES");
|
|
System.out.println("\nAvailable databases:");
|
|
boolean ruoyiExists = false;
|
|
while (rs.next()) {
|
|
String dbName = rs.getString(1);
|
|
System.out.println("- " + dbName);
|
|
if (dbName.equals("ruoyi")) {
|
|
ruoyiExists = true;
|
|
System.out.println(" - ruoyi database found!");
|
|
}
|
|
}
|
|
|
|
if (!ruoyiExists) {
|
|
System.out.println(" - ruoyi database NOT found!");
|
|
}
|
|
|
|
// Test 3: Try to connect directly to ruoyi database
|
|
System.out.println("\nTrying to connect directly to ruoyi database...");
|
|
String ruoyiUrl = "jdbc:mysql://localhost:3306/ruoyi?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8&allowPublicKeyRetrieval=true";
|
|
Connection ruoyiConn = DriverManager.getConnection(ruoyiUrl, username, password);
|
|
System.out.println("Connected to ruoyi database successfully!");
|
|
|
|
// Test 4: List tables in ruoyi database
|
|
Statement ruoyiStmt = ruoyiConn.createStatement();
|
|
ResultSet ruoyiRs = ruoyiStmt.executeQuery("SHOW TABLES");
|
|
System.out.println("\nTables in ruoyi database:");
|
|
int tableCount = 0;
|
|
while (ruoyiRs.next()) {
|
|
System.out.println("- " + ruoyiRs.getString(1));
|
|
tableCount++;
|
|
}
|
|
System.out.println("\nFound " + tableCount + " tables in ruoyi database");
|
|
|
|
// Close connections
|
|
ruoyiRs.close();
|
|
ruoyiStmt.close();
|
|
ruoyiConn.close();
|
|
rs.close();
|
|
stmt.close();
|
|
conn.close();
|
|
|
|
System.out.println("\nAll tests passed!");
|
|
|
|
} catch (Exception e) {
|
|
System.out.println("Error: " + e.getMessage());
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
} |