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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>ParameterParser xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/apache/commons/fileupload/ParameterParser.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"> * Copyright 2001-2004 The Apache Software Foundation</em><a name="3" href="#3">3</a> <em class="comment"> *</em><a name="4" href="#4">4</a> <em class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em><a name="5" href="#5">5</a> <em class="comment"> * you may not use this file except in compliance with the License.</em><a name="6" href="#6">6</a> <em class="comment"> * You may obtain a copy of the License at</em><a name="7" href="#7">7</a> <em class="comment"> *</em><a name="8" href="#8">8</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="9" href="#9">9</a> <em class="comment"> *</em><a name="10" href="#10">10</a> <em class="comment"> * Unless required by applicable law or agreed to in writing, software</em><a name="11" href="#11">11</a> <em class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em><a name="12" href="#12">12</a> <em class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em><a name="13" href="#13">13</a> <em class="comment"> * See the License for the specific language governing permissions and</em><a name="14" href="#14">14</a> <em class="comment"> * limitations under the License.</em><a name="15" href="#15">15</a> <em class="comment"> */</em><a name="16" href="#16">16</a> <strong>package</strong> <a href="../../../../org/apache/commons/fileupload/package-summary.html">org.apache.commons.fileupload</a>;<a name="17" href="#17">17</a> <a name="18" href="#18">18</a> <strong>import</strong> java.util.HashMap;<a name="19" href="#19">19</a> <strong>import</strong> java.util.Map;<a name="20" href="#20">20</a> <a name="21" href="#21">21</a> <em>/**<em>*</em></em><a name="22" href="#22">22</a> <em> * A simple parser intended to parse sequences of name/value pairs.</em><a name="23" href="#23">23</a> <em> * Parameter values are exptected to be enclosed in quotes if they</em><a name="24" href="#24">24</a> <em> * contain unsafe characters, such as '=' characters or separators.</em><a name="25" href="#25">25</a> <em> * Parameter values are optional and can be omitted.</em><a name="26" href="#26">26</a> <em> *</em><a name="27" href="#27">27</a> <em> * <p></em><a name="28" href="#28">28</a> <em> * <code>param1 = value; param2 = "anything goes; really"; param3</code></em><a name="29" href="#29">29</a> <em> * </p></em><a name="30" href="#30">30</a> <em> *</em><a name="31" href="#31">31</a> <em> * @author <a href="<a href="mailto:oleg@ural.ru" target="alexandria_uri">mailto:oleg@ural.ru</a>">Oleg Kalnichevski</a></em><a name="32" href="#32">32</a> <em> */</em><a name="33" href="#33">33</a> <a name="34" href="#34">34</a> <strong>public</strong> <strong>class</strong> <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a> {<a name="35" href="#35">35</a> <em>/**<em>*</em></em><a name="36" href="#36">36</a> <em> * String to be parsed.</em><a name="37" href="#37">37</a> <em> */</em><a name="38" href="#38">38</a> <strong>private</strong> <strong>char</strong>[] <strong>char</strong>s = <strong>null</strong>;<a name="39" href="#39">39</a> <a name="40" href="#40">40</a> <em>/**<em>*</em></em><a name="41" href="#41">41</a> <em> * Current position in the string.</em><a name="42" href="#42">42</a> <em> */</em><a name="43" href="#43">43</a> <strong>private</strong> <strong>int</strong> pos = 0;<a name="44" href="#44">44</a> <a name="45" href="#45">45</a> <em>/**<em>*</em></em><a name="46" href="#46">46</a> <em> * Maximum position in the string.</em><a name="47" href="#47">47</a> <em> */</em><a name="48" href="#48">48</a> <strong>private</strong> <strong>int</strong> len = 0;<a name="49" href="#49">49</a> <a name="50" href="#50">50</a> <em>/**<em>*</em></em><a name="51" href="#51">51</a> <em> * Start of a token.</em><a name="52" href="#52">52</a> <em> */</em><a name="53" href="#53">53</a> <strong>private</strong> <strong>int</strong> i1 = 0;<a name="54" href="#54">54</a> <a name="55" href="#55">55</a> <em>/**<em>*</em></em><a name="56" href="#56">56</a> <em> * End of a token.</em><a name="57" href="#57">57</a> <em> */</em><a name="58" href="#58">58</a> <strong>private</strong> <strong>int</strong> i2 = 0;<a name="59" href="#59">59</a> <a name="60" href="#60">60</a> <em>/**<em>*</em></em><a name="61" href="#61">61</a> <em> * Whether names stored in the map should be converted to lower case.</em><a name="62" href="#62">62</a> <em> */</em><a name="63" href="#63">63</a> <strong>private</strong> <strong>boolean</strong> lowerCaseNames = false;<a name="64" href="#64">64</a> <a name="65" href="#65">65</a> <em>/**<em>*</em></em><a name="66" href="#66">66</a> <em> * Default ParameterParser constructor.</em><a name="67" href="#67">67</a> <em> */</em><a name="68" href="#68">68</a> <strong>public</strong> <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a>() {<a name="69" href="#69">69</a> <strong>super</strong>();<a name="70" href="#70">70</a> }<a name="71" href="#71">71</a> <a name="72" href="#72">72</a> <em>/**<em>*</em></em><a name="73" href="#73">73</a> <em> * Are there any characters left to parse?</em><a name="74" href="#74">74</a> <em> *</em><a name="75" href="#75">75</a> <em> * @return <tt>true</tt> if there are unparsed characters,</em><a name="76" href="#76">76</a> <em> * <tt>false</tt> otherwise.</em><a name="77" href="#77">77</a> <em> */</em><a name="78" href="#78">78</a> <strong>private</strong> <strong>boolean</strong> hasChar() {<a name="79" href="#79">79</a> <strong>return</strong> <strong>this</strong>.pos < <strong>this</strong>.len;<a name="80" href="#80">80</a> }<a name="81" href="#81">81</a> <a name="82" href="#82">82</a> <em>/**<em>*</em></em><a name="83" href="#83">83</a> <em> * A helper method to process the parsed token. This method removes</em><a name="84" href="#84">84</a> <em> * leading and trailing blanks as well as enclosing quotation marks,</em><a name="85" href="#85">85</a> <em> * when necessary.</em><a name="86" href="#86">86</a> <em> *</em><a name="87" href="#87">87</a> <em> * @param quoted <tt>true</tt> if quotation marks are expected,</em><a name="88" href="#88">88</a> <em> * <tt>false</tt> otherwise.</em><a name="89" href="#89">89</a> <em> * @return the token</em><a name="90" href="#90">90</a> <em> */</em><a name="91" href="#91">91</a> <strong>private</strong> String getToken(<strong>boolean</strong> quoted) {<a name="92" href="#92">92</a> <em class="comment">// Trim leading white spaces</em><a name="93" href="#93">93</a> <strong>while</strong> ((i1 < i2) && (Character.isWhitespace(chars[i1]))) {<a name="94" href="#94">94</a> i1++;<a name="95" href="#95">95</a> }<a name="96" href="#96">96</a> <em class="comment">// Trim trailing white spaces</em><a name="97" href="#97">97</a> <strong>while</strong> ((i2 > i1) && (Character.isWhitespace(chars[i2 - 1]))) {<a name="98" href="#98">98</a> i2--;<a name="99" href="#99">99</a> }<a name="100" href="#100">100</a> <em class="comment">// Strip away quotation marks if necessary</em><a name="101" href="#101">101</a> <strong>if</strong> (quoted) {<a name="102" href="#102">102</a> <strong>if</strong> (((i2 - i1) >= 2)<a name="103" href="#103">103</a> && (chars[i1] == '"')<a name="104" href="#104">104</a> && (chars[i2 - 1] == '"')) {<a name="105" href="#105">105</a> i1++;<a name="106" href="#106">106</a> i2--;<a name="107" href="#107">107</a> }<a name="108" href="#108">108</a> }<a name="109" href="#109">109</a> String result = <strong>null</strong>;<a name="110" href="#110">110</a> <strong>if</strong> (i2 > i1) {<a name="111" href="#111">111</a> result = <strong>new</strong> String(chars, i1, i2 - i1);<a name="112" href="#112">112</a> }<a name="113" href="#113">113</a> <strong>return</strong> result;<a name="114" href="#114">114</a> }<a name="115" href="#115">115</a> <a name="116" href="#116">116</a> <em>/**<em>*</em></em><a name="117" href="#117">117</a> <em> * Tests if the given character is present in the array of characters.</em><a name="118" href="#118">118</a> <em> *</em><a name="119" href="#119">119</a> <em> * @param ch the character to test for presense in the array of characters</em><a name="120" href="#120">120</a> <em> * @param charray the array of characters to test against</em><a name="121" href="#121">121</a> <em> *</em><a name="122" href="#122">122</a> <em> * @return <tt>true</tt> if the character is present in the array of</em><a name="123" href="#123">123</a> <em> * characters, <tt>false</tt> otherwise.</em><a name="124" href="#124">124</a> <em> */</em><a name="125" href="#125">125</a> <strong>private</strong> <strong>boolean</strong> isOneOf(<strong>char</strong> ch, <strong>final</strong> <strong>char</strong>[] <strong>char</strong>ray) {<a name="126" href="#126">126</a> <strong>boolean</strong> result = false;<a name="127" href="#127">127</a> <strong>for</strong> (<strong>int</strong> i = 0; i < charray.length; i++) {<a name="128" href="#128">128</a> <strong>if</strong> (ch == charray[i]) {<a name="129" href="#129">129</a> result = <strong>true</strong>;<a name="130" href="#130">130</a> <strong>break</strong>;<a name="131" href="#131">131</a> }<a name="132" href="#132">132</a> }<a name="133" href="#133">133</a> <strong>return</strong> result;<a name="134" href="#134">134</a> }<a name="135" href="#135">135</a> <a name="136" href="#136">136</a> <em>/**<em>*</em></em><a name="137" href="#137">137</a> <em> * Parses out a token until any of the given terminators</em><a name="138" href="#138">138</a> <em> * is encountered.</em><a name="139" href="#139">139</a> <em> *</em><a name="140" href="#140">140</a> <em> * @param terminators the array of terminating characters. Any of these</em><a name="141" href="#141">141</a> <em> * characters when encountered signify the end of the token</em><a name="142" href="#142">142</a> <em> *</em><a name="143" href="#143">143</a> <em> * @return the token</em><a name="144" href="#144">144</a> <em> */</em><a name="145" href="#145">145</a> <strong>private</strong> String parseToken(<strong>final</strong> <strong>char</strong>[] terminators) {<a name="146" href="#146">146</a> <strong>char</strong> ch;<a name="147" href="#147">147</a> i1 = pos;⌨️ 快捷键说明
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