¹ØÓÚ MySql JDBC ÔÚnetbeansÖÐÁ¬½Ó²»ÉϵÄÎÊÌâ

Java code:

Connection con;
Statement sql = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
out.print(e);
}
try {
String url="jdbc:mysql://localhost:3306/ChatDB";
con = DriverManager.getConnection(url,
"wtc", " 9999999");
} catch (SQLException e) {
out.print(e);
}
sql = con.createStatement();



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G:\programming\Netbeans\WebApplication1\build\generated\src\org\apache\jsp\index_jsp.java:84: ¿ÉÄÜÉÐδ³õʼ»¯±äÁ¿ con
      sql = con.createStatement();

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An error occurred at line: 39 in the jsp file: /index.jsp
The local variable con may not have been initialized
36:                {
37:                    out.print(e);
38:                }
39:            sql=con.createStatement(); <