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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" /><title>ScriptAction xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/apache/struts/scripting/ScriptAction.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*</em><a name="2" href="#2">2</a> <em class="comment"> * $Id: ScriptAction.java 357368 2005-12-17 19:17:51Z mrdon $</em><a name="3" href="#3">3</a> <em class="comment"> *</em><a name="4" href="#4">4</a> <em class="comment"> * Copyright 2000-2004 The Apache Software Foundation.</em><a name="5" href="#5">5</a> <em class="comment"> *</em><a name="6" href="#6">6</a> <em class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em><a name="7" href="#7">7</a> <em class="comment"> * you may not use this file except in compliance with the License.</em><a name="8" href="#8">8</a> <em class="comment"> * You may obtain a copy of the License at</em><a name="9" href="#9">9</a> <em class="comment"> *</em><a name="10" href="#10">10</a> <em class="comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em><a name="11" href="#11">11</a> <em class="comment"> *</em><a name="12" href="#12">12</a> <em class="comment"> * Unless required by applicable law or agreed to in writing, software</em><a name="13" href="#13">13</a> <em class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em><a name="14" href="#14">14</a> <em class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em><a name="15" href="#15">15</a> <em class="comment"> * See the License for the specific language governing permissions and</em><a name="16" href="#16">16</a> <em class="comment"> * limitations under the License.</em><a name="17" href="#17">17</a> <em class="comment"> */</em><a name="18" href="#18">18</a> <strong>package</strong> <a href="../../../../org/apache/struts/scripting/package-summary.html">org.apache.struts.scripting</a>;<a name="19" href="#19">19</a> <a name="20" href="#20">20</a> <em class="comment">// util imports:</em><a name="21" href="#21">21</a> <strong>import</strong> java.util.ArrayList;<a name="22" href="#22">22</a> <strong>import</strong> java.util.Enumeration;<a name="23" href="#23">23</a> <strong>import</strong> java.util.Hashtable;<a name="24" href="#24">24</a> <strong>import</strong> java.util.List;<a name="25" href="#25">25</a> <strong>import</strong> java.util.Locale;<a name="26" href="#26">26</a> <strong>import</strong> java.util.Map;<a name="27" href="#27">27</a> <strong>import</strong> java.util.Properties;<a name="28" href="#28">28</a> <strong>import</strong> java.util.StringTokenizer;<a name="29" href="#29">29</a> <a name="30" href="#30">30</a> <em class="comment">// io imports:</em><a name="31" href="#31">31</a> <strong>import</strong> java.io.File;<a name="32" href="#32">32</a> <strong>import</strong> java.io.FileReader;<a name="33" href="#33">33</a> <strong>import</strong> java.io.IOException;<a name="34" href="#34">34</a> <strong>import</strong> java.io.InputStream;<a name="35" href="#35">35</a> <a name="36" href="#36">36</a> <em class="comment">// logging imports:</em><a name="37" href="#37">37</a> <strong>import</strong> org.apache.commons.logging.Log;<a name="38" href="#38">38</a> <strong>import</strong> org.apache.commons.logging.LogFactory;<a name="39" href="#39">39</a> <a name="40" href="#40">40</a> <em class="comment">// struts imports:</em><a name="41" href="#41">41</a> <strong>import</strong> org.apache.struts.action.Action;<a name="42" href="#42">42</a> <strong>import</strong> org.apache.struts.action.ActionErrors;<a name="43" href="#43">43</a> <strong>import</strong> org.apache.struts.action.ActionForm;<a name="44" href="#44">44</a> <strong>import</strong> org.apache.struts.action.ActionForward;<a name="45" href="#45">45</a> <strong>import</strong> org.apache.struts.action.ActionMapping;<a name="46" href="#46">46</a> <strong>import</strong> org.apache.struts.action.ActionMessages;<a name="47" href="#47">47</a> <a name="48" href="#48">48</a> <em class="comment">// misc imports:</em><a name="49" href="#49">49</a> <strong>import</strong> javax.servlet.ServletContext;<a name="50" href="#50">50</a> <strong>import</strong> javax.servlet.http.HttpServletRequest;<a name="51" href="#51">51</a> <strong>import</strong> javax.servlet.http.HttpServletResponse;<a name="52" href="#52">52</a> <strong>import</strong> javax.servlet.http.HttpSession;<a name="53" href="#53">53</a> <strong>import</strong> org.apache.bsf.BSFException;<a name="54" href="#54">54</a> <strong>import</strong> org.apache.bsf.BSFManager;<a name="55" href="#55">55</a> <strong>import</strong> org.apache.bsf.util.IOUtils;<a name="56" href="#56">56</a> <a name="57" href="#57">57</a> <a name="58" href="#58">58</a> <em>/**<em>*</em></em><a name="59" href="#59">59</a> <em> * This Action uses scripts to perform its action. The scripting framework is</em><a name="60" href="#60">60</a> <em> * Apache's Bean Scripting Framework which allows the scripts to be written</em><a name="61" href="#61">61</a> <em> * many of the popular scripting languages including JavaScript, Perl, Python,</em><a name="62" href="#62">62</a> <em> * and even VBA. <br /></em><a name="63" href="#63">63</a> <em> * <br /></em><a name="64" href="#64">64</a> <em> * To determine what script will be executed, the "parameter" attribute of the</em><a name="65" href="#65">65</a> <em> * action mapping should contain the name of the script relative to the web</em><a name="66" href="#66">66</a> <em> * application root directory (i.e. <a href="http://server/app)." target="alexandria_uri">http://server/app).</a> <br /></em><a name="67" href="#67">67</a> <em> * <br /></em><a name="68" href="#68">68</a> <em> * Before the script completes, the next ActionForward needs to be specified.</em><a name="69" href="#69">69</a> <em> * This can be done one of two ways:</em><a name="70" href="#70">70</a> <em> * <ol></em><a name="71" href="#71">71</a> <em> * <li> Set <code>struts.forwardName</code> to the name of the forward</li></em><a name="72" href="#72">72</a> <em> *</em><a name="73" href="#73">73</a> <em> * <li> Set <code>struts.forward</code> to the actual ActionForward object</em><a name="74" href="#74">74</a> <em> * </li></em><a name="75" href="#75">75</a> <em> * </ol></em><a name="76" href="#76">76</a> <em> * A number of pre-defined variables are available to the script:</em><a name="77" href="#77">77</a> <em> * <ul></em><a name="78" href="#78">78</a> <em> * <li> <code>request</code> - The HTTP request</li></em><a name="79" href="#79">79</a> <em> * <li> <code>response</code> - The HTTP response</li></em><a name="80" href="#80">80</a> <em> * <li> <code>session</code> - The session</li></em><a name="81" href="#81">81</a> <em> * <li> <code>application</code> - The servlet context</li></em><a name="82" href="#82">82</a> <em> * <li> <code>struts</code> - A grouping of all Struts-related objects</li></em><a name="83" href="#83">83</a> <em> *</em><a name="84" href="#84">84</a> <em> * <li> <code>log</code> - A logging instance</li></em><a name="85" href="#85">85</a> <em> * </ul></em><a name="86" href="#86">86</a> <em> * You can add your own variables by creating a BSFManagerFilter and</em><a name="87" href="#87">87</a> <em> * configuring it in struts-scripting.properties:</em><a name="88" href="#88">88</a> <em> * <ul></em><a name="89" href="#89">89</a> <em> * <li> <code>struts-scripting.filters.FILTER_NAME.class=FILTER_CLASS</code></em><a name="90" href="#90">90</a> <em> * - The class implementing BSFManagerFilter where FILTER_NAME is the name</em><a name="91" href="#91">91</a> <em> * you are calling the filter.</li></em><a name="92" href="#92">92</a> <em> * <li> <code></em><a name="93" href="#93">93</a> <em> * struts-scripting.filters.FILTER_NAME.PROPERTY_NAME=PROPERTY_VALUE</em><a name="94" href="#94">94</a> <em> * </code> - A property to be used by the filter.</li></em><a name="95" href="#95">95</a> <em> * </ul></em><a name="96" href="#96">96</a> <em> * <br /></em><a name="97" href="#97">97</a> <em> * <br /></em><a name="98" href="#98">98</a> <em> * To use other scripting engines other than BeanShell, create a file called</em><a name="99" href="#99">99</a> <em> * <code>struts-scripting.properties</code> and add two properties for each</em><a name="100" href="#100">100</a> <em> * engine:</em><a name="101" href="#101">101</a> <em> * <ul></em><a name="102" href="#102">102</a> <em> * <li> <code>struts-scripting.engine.ENGINE_NAME.class</code> - The class of</em><a name="103" href="#103">103</a> <em> * the BSF engine where ENGINE_NAME is the name you are calling the engine.</em><a name="104" href="#104">104</a> <em> * </li></em><a name="105" href="#105">105</a> <em> * <li> <code>struts-scripting.engine.ENGINE_NAME.extensions</code> - A</em><a name="106" href="#106">106</a> <em> * comma-delimited list of file extensions that will be used to identify the</em><a name="107" href="#107">107</a> <em> * engine to use to execute the script.</li></em><a name="108" href="#108">108</a> <em> * </ul></em><a name="109" href="#109">109</a> <em> * This code was originally based off code from JPublish, but has since been</em><a name="110" href="#110">110</a> <em> * almost completely rewritten.</em><a name="111" href="#111">111</a> <em> */</em><a name="112" href="#112">112</a> <strong>public</strong> <strong>class</strong> <a href="../../../../org/apache/struts/scripting/ScriptAction.html">ScriptAction</a> <strong>extends</strong> Action {<a name="113" href="#113">113</a> <a name="114" href="#114">114</a> <em>/**<em>* The logging instance. */</em></em><a name="115" href="#115">115</a> <strong>protected</strong> <strong>static</strong> <strong>final</strong> Log LOG = LogFactory.getLog(ScriptAction.<strong>class</strong>);<a name="116" href="#116">116</a> <a name="117" href="#117">117</a> <em>/**<em>* The default path to the properties file. */</em></em><a name="118" href="#118">118</a> <strong>protected</strong> <strong>static</strong> <strong>final</strong> String PROPS_PATH = <span class="string">"/struts-scripting.properties"</span>;<a name="119" href="#119">119</a> <a name="120" href="#120">120</a> <em>/**<em>* The base property for alternate BSF engines. */</em></em><a name="121" href="#121">121</a> <strong>protected</strong> <strong>static</strong> <strong>final</strong> String ENGINE_BASE = <span class="string">"struts-scripting.engine."</span>;<a name="122" href="#122">122</a> <a name="123" href="#123">123</a> <em>/**<em>* The base property for classes that put new variables in the context. */</em></em><a name="124" href="#124">124</a> <strong>protected</strong> <strong>static</strong> <strong>final</strong> String FILTERS_BASE = <span class="string">"struts-scripting.filters."</span>;<a name="125" href="#125">125</a> <a name="126" href="#126">126</a> <em>/**<em>* A list of initialized filters. */</em></em><a name="127" href="#127">127</a> <strong>private</strong> <strong>static</strong> <a href="../../../../org/apache/struts/scripting/BSFManagerFilter.html">BSFManagerFilter</a>[] filters = <strong>null</strong>;<a name="128" href="#128">128</a> <a name="129" href="#129">129</a> <em>/**<em>* Holds the "compiled" scripts and their information. */</em></em><a name="130" href="#130">130</a> <strong>private</strong> Map scripts = <strong>new</strong> Hashtable();<a name="131" href="#131">131</a> <a name="132" href="#132">132</a> <strong>static</strong> {<a name="133" href="#133">133</a> Properties props = <strong>new</strong> Properties();<a name="134" href="#134">134</a> <strong>try</strong> {<a name="135" href="#135">135</a> InputStream in =<a name="136" href="#136">136</a> ScriptAction.<strong>class</strong>.getClassLoader()<a name="137" href="#137">137</a> .getResourceAsStream(PROPS_PATH);<a name="138" href="#138">138</a> <strong>if</strong> (in == <strong>null</strong>) {<a name="139" href="#139">139</a> in =<a name="140" href="#140">140</a> ScriptAction.<strong>class</strong>.getClassLoader().getResourceAsStream(<a name="141" href="#141">141</a> <span class="string">"/struts-bsf.properties"</span>);<a name="142" href="#142">142</a> <strong>if</strong> (in != <strong>null</strong>) {<a name="143" href="#143">143</a> LOG.warn(<span class="string">"The struts-bsf.properties file has been "</span><a name="144" href="#144">144</a> + <span class="string">"deprecated. Please use "</span><a name="145" href="#145">145</a> + <span class="string">"struts-scripting.properties instead."</span>);<a name="146" href="#146">146</a> } <strong>else</strong> {<a name="147" href="#147">147</a> LOG.warn(<span class="string">"struts-scripting.properties not found, using "</span><a name="148" href="#148">148</a> + <span class="string">"default engine mappings."</span>);<a name="149" href="#149">149</a> }<a name="150" href="#150">150</a> }<a name="151" href="#151">151</a> <a name="152" href="#152">152</a> <strong>if</strong> (in != <strong>null</strong>) {<a name="153" href="#153">153</a> props.load(in);<a name="154" href="#154">154</a> }<a name="155" href="#155">155</a> } <strong>catch</strong> (Exception ex) {<a name="156" href="#156">156</a> LOG.warn(<span class="string">"Unable to load struts-scripting.properties, using "</span><a name="157" href="#157">157</a> + <span class="string">" default engine mappings."</span>);<a name="158" href="#158">158</a> }<a name="159" href="#159">159</a> <strong>int</strong> pos = ENGINE_BASE.length();<a name="160" href="#160">160</a> <strong>for</strong> (Enumeration e = props.propertyNames(); e.hasMoreElements();) {<a name="161" href="#161">161</a> String name = (String) e.nextElement();<a name="162" href="#162">162</a> <strong>if</strong> (name.startsWith(ENGINE_BASE) && name.endsWith(<span class="string">".class"</span>)) {<a name="163" href="#163">163</a> String type = name.substring(pos, name.indexOf('.', pos));<a name="164" href="#164">164</a> String cls = props.getProperty(name);⌨️ 快捷键说明
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