jsp里面放的java代码，总是出错，给看看

Answer 1

<% if(${porfiles.bdb}.equals("0")){
}

Syntax error. Looking at the error message, it is obviously a jsp compilation error.
There is a problem with the syntax in this place.
In jsp, If you want to use el expression, don’t use it inside <%%>
Just use it outside

Answer 2

<%}else if(){
    %>

Here, what’s the condition of if?

Answer 3

In addition to what is mentioned above, it is more reliable to put the string 0 in the front, otherwise it will be empty in the front

Answer 4

Never write this kind of code, readability and maintainability are zero. !

Answer 5

Replace it with a C mark, it’s so messy and hard to find