servletjsp一些应用程序

				
				
				EL Operators
								      HREF="/el/JSP-Styles.css"
				      TYPE="text/css">
				
				
				
				  
				  EL Operators
				
				
				
				  Arithmetic Operators
				      Relational Operators
				  ExpressionResultExpressionResult
				  
				    \${3+2-1}${3+2-1}  
				    \${1<2}${1				  
				    \${"1"+2}${"1"+2}     
				    \${"a"<"b"}${"a"				  
				    \${1 + 2*3 + 3/4}${1 + 2*3 + 3/4}  
				    \${2/3 >= 3/2}${2/3 >= 3/2}        = --%>
				  
				    \${3%2}${3%2}                 
				    \${3/4 == 0.75}${3/4 == 0.75} 
				  
				    
				    \${(8 div 2) mod 3}${(8 div 2) mod 3}
				    
				    \${null == "test"}${null == "test"}
				      
				  Logical Operators 
				      empty Operator
				  ExpressionResultExpressionResult
				  
				    \${(1<2) && (4<3)}${(1				    \${empty ""}${empty ""} 
				  
				    \${(1<2) || (4<3)}${(1				    \${empty null}${empty null} 
				  
				    \${!(1<2)}${!(1				    
				    \${empty param.blah}${empty param.blah}