111 lines
4.5 KiB
HTML
111 lines
4.5 KiB
HTML
<!DOCTYPE html><html><head><meta charset="UTF-8" /><title>Source Code</title></head><body><pre><%--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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--%>
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<%@ taglib prefix="my" uri="http://tomcat.apache.org/example-taglib" %>
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<html>
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<head>
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<title>JSP 2.0 Expression Language - Composite Expressions</title>
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</head>
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<body>
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<h1>JSP 2.0 Expression Language - Composite Expressions</h1>
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<hr>
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This example illustrates EL composite expressions. Composite expressions
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are formed by grouping together multiple EL expressions. Each of them is
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evaluated from left to right, coerced to String, all those strings are
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concatenated, and the result is coerced to the expected type.
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<jsp:useBean id="values" class="jsp2.examples.ValuesBean" />
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<blockquote>
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<code>
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<table border="1">
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<thead>
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<td><b>EL Expression</b></td>
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<td><b>Type</b></td>
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<td><b>Result</b></td>
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</thead>
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<tr>
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<td>\${'hello'} wo\${'rld'}</td>
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<td>String</td>
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<td><jsp:setProperty name="values" property="stringValue" value="${'hello'} wo${'rld'}"/>${values.stringValue}</td>
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</tr>
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<tr>
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<td>\${'hello'} wo\${'rld'}</td>
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<td>String</td>
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<td><my:values string="${'hello'} wo${'rld'}"/></td>
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</tr>
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<tr>
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<td>\${1+2}.\${220}</td>
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<td>Double</td>
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<td><jsp:setProperty name="values" property="doubleValue" value="${1+2}.${220}"/>${values.doubleValue}</td>
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</tr>
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<tr>
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<td>\${1+2}.\${220}</td>
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<td>Double</td>
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<td><my:values double="${1+2}.${220}"/></td>
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</tr>
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<tr>
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<td>000\${1}\${7}</td>
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<td>Long</td>
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<td><jsp:setProperty name="values" property="longValue" value="000${1}${7}"/>${values.longValue}</td>
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</tr>
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<tr>
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<td>000\${1}\${7}</td>
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<td>Long</td>
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<td><my:values long="000${1}${7}"/></td>
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</tr>
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<!--
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Undefined values are to be coerced to String, to be "",
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https://bz.apache.org/bugzilla/show_bug.cgi?id=47413
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-->
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<tr>
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<td>\${undefinedFoo}hello world\${undefinedBar}</td>
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<td>String</td>
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<td><jsp:setProperty name="values" property="stringValue" value="${undefinedFoo}hello world${undefinedBar}"/>${values.stringValue}</td>
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</tr>
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<tr>
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<td>\${undefinedFoo}hello world\${undefinedBar}</td>
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<td>String</td>
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<td><my:values string="${undefinedFoo}hello world${undefinedBar}"/></td>
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</tr>
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<tr>
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<td>\${undefinedFoo}\${undefinedBar}</td>
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<td>Double</td>
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<td><jsp:setProperty name="values" property="doubleValue" value="${undefinedFoo}${undefinedBar}"/>${values.doubleValue}</td>
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</tr>
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<tr>
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<td>\${undefinedFoo}\${undefinedBar}</td>
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<td>Double</td>
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<td><my:values double="${undefinedFoo}${undefinedBar}"/></td>
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</tr>
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<tr>
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<td>\${undefinedFoo}\${undefinedBar}</td>
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<td>Long</td>
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<td><jsp:setProperty name="values" property="longValue" value="${undefinedFoo}${undefinedBar}"/>${values.longValue}</td>
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</tr>
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<tr>
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<td>\${undefinedFoo}\${undefinedBar}</td>
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<td>Long</td>
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<td><my:values long="${undefinedFoo}${undefinedBar}"/></td>
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</tr>
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</table>
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</code>
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</blockquote>
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</body>
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</html>
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</pre></body></html> |