示例

import java.sql.*;
import javax.sql.*;

public class ClassA {{
public void method(){
Connection con = null;
Connection con2 = null;
try {
con = DriverManager.getConnection("database url");
con2 = DataSource.getConnection("database url");
}
finally {
}
}
}


解决方案
在 finally() 块中,必须关闭所有打开的 JDBC 连接。

import java.sql.*;
import javax.sql.*;

public class ClassA {{
public void method(){
Connection con = null;
Connection con2 = null;
try {
con = DriverManager.getConnection("database url");
con2 = DataSource.getConnection("database url");
}
finally {
con.close();
con2.close();
}
}
}