JSTL if tag for equal strings

Question

I ve got a variable from an object on my JSP page    lt    ansokanInfo getPSystem     gt   The value of the variable is NAT which is correct and I want to apply certain page elements for this value  How do I use a tag to know the case  I tried something like   lt c if test      ansokanInfo getPSystem       NAT    gt           process    lt  c if gt     But the above doesn t display anything  How should I do it  Or can I just as well use scriptlets i e    lt   if  ansokanInfo getPSystem   equals  NAT      gt  process  lt       gt    Thanks for any answer or comment

User · Accepted Answer

Try    lt c if test      ansokanInfo PSystem     NAT    gt    JSP Servlet 2 4  I think that s the version number  doesn t support method calls in EL and only support properties  The latest servlet containers do support method calls  ie Tomcat 7

User · Answer

You can use scriptlets  however  this is not the way to go  Nowdays inline scriplets or JAVA code in your JSP files is considered a bad habit   You should read up on JSTL a bit more  If the ansokanInfo object is in your request or session scope  printing the object  toString   method  like this     ansokanInfo  can give you some base information    ansokanInfo pSystem  should call the object getter method  If this all works  you can use this     lt c if test     ansokanInfo pSystem      NAT    gt  tataa  lt  c if gt

User · Answer

I think the other answers miss one important detail regarding the property name to use in the EL expression  The rules for converting from the method names to property names are specified in  Introspector decpitalize  which is part of the java bean standard   This normally means converting the first character from upper case to lower case  but in the  unusual  special case when there is more than one character and both the first and second characters are upper case  we leave it alone  Thus  quot FooBah quot  becomes  quot fooBah quot  and  quot X quot  becomes  quot x quot   but  quot URL quot  stays as  quot URL quot    So in your case the JSTL code should look like the following  note the capital  P    lt c if test    quot   ansokanInfo PSystem     NAT   quot  gt

User · Answer

lt c if test    ansokanInfo pSystem eq  NAT    gt

[java] JSTL if tag for equal strings

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