Java Openshift MysQL Tomcat连接为空
我是Openshift的新手,尝试托管我的应用程序,但无法连接到Openshift中的MySQL数据库 这是我连接MySQL的代码:Java Openshift MysQL Tomcat连接为空,java,mysql,tomcat,database-connection,openshift,Java,Mysql,Tomcat,Database Connection,Openshift,我是Openshift的新手,尝试托管我的应用程序,但无法连接到Openshift中的MySQL数据库 这是我连接MySQL的代码: public class DBUtill { public Connection getConnection() { String url = "jdbc:mysql://127.2.191.130:3306/database"; try { Class.forName("com.mysql.jdbc.Driver");
public class DBUtill {
public Connection getConnection() {
String url = "jdbc:mysql://127.2.191.130:3306/database";
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
Connection con = null;
try {
con = DriverManager.getConnection(url, "user", "password");
} catch (SQLException e) {
e.printStackTrace();
}
return con;
}
public static void closeConnection(Connection conn) {
try {
conn.close();
} catch (Exception e) {
e.getMessage();
}
}
但是它不起作用,因为我总是得到con=null
但当我将相同的代码直接放在jsp页面中时,一切正常:
<%@page import="com.java.testapp.db.DBUtill"%>
<%@page import="java.sql.Connection"%>
<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.SQLException"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
String url = "jdbc:mysql://127.2.191.130:3306/database";
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
Connection con = null;
try {
con = DriverManager.getConnection(url, "user", "password");
} catch (SQLException e) {
e.printStackTrace();
}
DBUtill utill = new DBUtill();
out.println( "Connection: " +utill.getConnection()); // CONNECTION = null
out.println( "Connection: " +con); // IT WORKS!
%>
</body>
</html>
在此处插入标题
我不明白为什么我在使用DBUtill类连接MySQL时会得到con=null。但直接在jsp中连接可以完美地工作。
求求你,救命