<%-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --%> <%@ taglib prefix="my" uri="http://tomcat.apache.org/example-taglib" %> JSP 2.0 Expression Language - Composite Expressions

JSP 2.0 Expression Language - Composite Expressions

This example illustrates EL composite expressions. Composite expressions are formed by grouping together multiple EL expressions. Each of them is evaluated from left to right, coerced to String, all those strings are concatenated, and the result is coerced to the expected type.
EL Expression Type Result
\${'hello'} wo\${'rld'} String ${values.stringValue}
\${'hello'} wo\${'rld'} String
\${1+2}.\${220} Double ${values.doubleValue}
\${1+2}.\${220} Double
000\${1}\${7} Long ${values.longValue}
000\${1}\${7} Long
\${undefinedFoo}hello world\${undefinedBar} String ${values.stringValue}
\${undefinedFoo}hello world\${undefinedBar} String
\${undefinedFoo}\${undefinedBar} Double ${values.doubleValue}
\${undefinedFoo}\${undefinedBar} Double
\${undefinedFoo}\${undefinedBar} Long ${values.longValue}
\${undefinedFoo}\${undefinedBar} Long