jdbc连接数据库，后台报java.net.ConnectException时，怎样在jsp前台显示错误信息
String url = "jdbc:mysql://localhost/tableName?user=anan&password=123456&useUnicode=true&characterEncoding=8859_1 ";Class.forName( "com.mysql.jdbc.Driver ");
conn = DriverManager.getConnection(url);
当数据库未启动时，此时后台会报java.net.ConnectException，MESSAGE: Connection refused: connect。但前台jsp页面确正常，只是没有结果记录显示，
这样很不直观，请问如何让后台的报错信息同时也在前台显示
[解决办法]
做个异常处理在前台输出不就行拉！
out.println(e.toString());
[解决办法]
try{
String url = "jdbc:mysql://localhost/tableName?user=anan&password=123456&useUnicode=true&characterEncoding=8859_1 ";Class.forName( "com.mysql.jdbc.Driver ");
conn = DriverManager.getConnection(url);
}
catch(Exception e)
{ out.print(e.getMessage());}
[解决办法]
try{
String url = "jdbc:mysql://localhost/tableName?user=anan&password=123456&useUnicode=true&characterEncoding=8859_1 ";Class.forName( "com.mysql.jdbc.Driver ");
conn = DriverManager.getConnection(url);
}
catch(Exception e)
{ request.setAttribute( "ex ",e.getMessage().toString());
return forward;
}
[解决办法]
自己写个自定义异常
