[英]Openshift - Cannot connect to mysql with Java
我是Harold和Im,是Openshift的新手,Im使用下面的代码通过示例通过https://www.openshift.com/forums/openshift/no-suitable-driver-found-error与Java连接到MySQL,
不幸的是,我无法使其工作。
首先,它说“找不到合适的驱动程序”,因此我将mysql-connector添加到WEB-INF / lib文件夹并添加Class.forName(“ com.mysql.jdc.Driver”);
然后,它不起作用,也没有显示错误。
任何帮助将不胜感激
import java.lang.String;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
public class someClass {
public String databaseCall() {
Connection con = null;
Statement st = null;
ResultSet rs = null;
String myVersion = "";
String url = "jdbc:mysql://127.x.xxx.x:3306/testdb"; //make sure that this database name exists;
String user = "admin";
String password = "xxxxxxxxxxxxxxx";
try {
con = DriverManager.getConnection(url, user, password);
st = con.createStatement();
rs = st.executeQuery("SELECT VERSION()");
if (rs.next()) {
System.out.println(rs.getString(1));
myVersion = rs.getString(1);
}
} catch (SQLException ex) {
myVersion = ex.getMessage();
} finally {
try {
if (rs != null) {
rs.close();
}
if (st != null) {
st.close();
}
if (con != null) {
con.close();
}
} catch (SQLException ex) {
myVersion = ex.getMessage();
}
}
return myVersion;
}
}
尝试通读这篇有关如何使用每个Servlet或应用程序容器提供的默认mysql和postgresql连接的知识库文章: https : //www.openshift.com/kb/kb-kb1086-how-to-use-the-pre-在Java中配置mysqlds和postgresqlds数据源
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