parameterparser.html

java 的上传功能很强大的实施上述事实上说是

<a name="106" href="#106">106</a>                 i1++;
<a name="107" href="#107">107</a>                 i2--;
<a name="108" href="#108">108</a>             }
<a name="109" href="#109">109</a>         }
<a name="110" href="#110">110</a>         String result = <strong class="jxr_keyword">null</strong>;
<a name="111" href="#111">111</a>         <strong class="jxr_keyword">if</strong> (i2 &gt; i1) {
<a name="112" href="#112">112</a>             result = <strong class="jxr_keyword">new</strong> String(chars, i1, i2 - i1);
<a name="113" href="#113">113</a>         }
<a name="114" href="#114">114</a>         <strong class="jxr_keyword">return</strong> result;
<a name="115" href="#115">115</a>     }
<a name="116" href="#116">116</a> 
<a name="117" href="#117">117</a>     <em class="jxr_javadoccomment">/**</em>
<a name="118" href="#118">118</a> <em class="jxr_javadoccomment">     * Tests if the given character is present in the array of characters.</em>
<a name="119" href="#119">119</a> <em class="jxr_javadoccomment">     *</em>
<a name="120" href="#120">120</a> <em class="jxr_javadoccomment">     * @param ch the character to test for presense in the array of characters</em>
<a name="121" href="#121">121</a> <em class="jxr_javadoccomment">     * @param charray the array of characters to test against</em>
<a name="122" href="#122">122</a> <em class="jxr_javadoccomment">     *</em>
<a name="123" href="#123">123</a> <em class="jxr_javadoccomment">     * @return &lt;tt&gt;true&lt;/tt&gt; if the character is present in the array of</em>
<a name="124" href="#124">124</a> <em class="jxr_javadoccomment">     *   characters, &lt;tt&gt;false&lt;/tt&gt; otherwise.</em>
<a name="125" href="#125">125</a> <em class="jxr_javadoccomment">     */</em>
<a name="126" href="#126">126</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> isOneOf(<strong class="jxr_keyword">char</strong> ch, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">char</strong>[] charray) {
<a name="127" href="#127">127</a>         <strong class="jxr_keyword">boolean</strong> result = false;
<a name="128" href="#128">128</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; charray.length; i++) {
<a name="129" href="#129">129</a>             <strong class="jxr_keyword">if</strong> (ch == charray[i]) {
<a name="130" href="#130">130</a>                 result = <strong class="jxr_keyword">true</strong>;
<a name="131" href="#131">131</a>                 <strong class="jxr_keyword">break</strong>;
<a name="132" href="#132">132</a>             }
<a name="133" href="#133">133</a>         }
<a name="134" href="#134">134</a>         <strong class="jxr_keyword">return</strong> result;
<a name="135" href="#135">135</a>     }
<a name="136" href="#136">136</a> 
<a name="137" href="#137">137</a>     <em class="jxr_javadoccomment">/**</em>
<a name="138" href="#138">138</a> <em class="jxr_javadoccomment">     * Parses out a token until any of the given terminators</em>
<a name="139" href="#139">139</a> <em class="jxr_javadoccomment">     * is encountered.</em>
<a name="140" href="#140">140</a> <em class="jxr_javadoccomment">     *</em>
<a name="141" href="#141">141</a> <em class="jxr_javadoccomment">     * @param terminators the array of terminating characters. Any of these</em>
<a name="142" href="#142">142</a> <em class="jxr_javadoccomment">     * characters when encountered signify the end of the token</em>
<a name="143" href="#143">143</a> <em class="jxr_javadoccomment">     *</em>
<a name="144" href="#144">144</a> <em class="jxr_javadoccomment">     * @return the token</em>
<a name="145" href="#145">145</a> <em class="jxr_javadoccomment">     */</em>
<a name="146" href="#146">146</a>     <strong class="jxr_keyword">private</strong> String parseToken(<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">char</strong>[] terminators) {
<a name="147" href="#147">147</a>         <strong class="jxr_keyword">char</strong> ch;
<a name="148" href="#148">148</a>         i1 = pos;
<a name="149" href="#149">149</a>         i2 = pos;
<a name="150" href="#150">150</a>         <strong class="jxr_keyword">while</strong> (hasChar()) {
<a name="151" href="#151">151</a>             ch = chars[pos];
<a name="152" href="#152">152</a>             <strong class="jxr_keyword">if</strong> (isOneOf(ch, terminators)) {
<a name="153" href="#153">153</a>                 <strong class="jxr_keyword">break</strong>;
<a name="154" href="#154">154</a>             }
<a name="155" href="#155">155</a>             i2++;
<a name="156" href="#156">156</a>             pos++;
<a name="157" href="#157">157</a>         }
<a name="158" href="#158">158</a>         <strong class="jxr_keyword">return</strong> getToken(false);
<a name="159" href="#159">159</a>     }
<a name="160" href="#160">160</a> 
<a name="161" href="#161">161</a>     <em class="jxr_javadoccomment">/**</em>
<a name="162" href="#162">162</a> <em class="jxr_javadoccomment">     * Parses out a token until any of the given terminators</em>
<a name="163" href="#163">163</a> <em class="jxr_javadoccomment">     * is encountered outside the quotation marks.</em>
<a name="164" href="#164">164</a> <em class="jxr_javadoccomment">     *</em>
<a name="165" href="#165">165</a> <em class="jxr_javadoccomment">     * @param terminators the array of terminating characters. Any of these</em>
<a name="166" href="#166">166</a> <em class="jxr_javadoccomment">     * characters when encountered outside the quotation marks signify the end</em>
<a name="167" href="#167">167</a> <em class="jxr_javadoccomment">     * of the token</em>
<a name="168" href="#168">168</a> <em class="jxr_javadoccomment">     *</em>
<a name="169" href="#169">169</a> <em class="jxr_javadoccomment">     * @return the token</em>
<a name="170" href="#170">170</a> <em class="jxr_javadoccomment">     */</em>
<a name="171" href="#171">171</a>     <strong class="jxr_keyword">private</strong> String parseQuotedToken(<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">char</strong>[] terminators) {
<a name="172" href="#172">172</a>         <strong class="jxr_keyword">char</strong> ch;
<a name="173" href="#173">173</a>         i1 = pos;
<a name="174" href="#174">174</a>         i2 = pos;
<a name="175" href="#175">175</a>         <strong class="jxr_keyword">boolean</strong> quoted = false;
<a name="176" href="#176">176</a>         <strong class="jxr_keyword">boolean</strong> charEscaped = false;
<a name="177" href="#177">177</a>         <strong class="jxr_keyword">while</strong> (hasChar()) {
<a name="178" href="#178">178</a>             ch = chars[pos];
<a name="179" href="#179">179</a>             <strong class="jxr_keyword">if</strong> (!quoted &amp;&amp; isOneOf(ch, terminators)) {
<a name="180" href="#180">180</a>                 <strong class="jxr_keyword">break</strong>;
<a name="181" href="#181">181</a>             }
<a name="182" href="#182">182</a>             <strong class="jxr_keyword">if</strong> (!charEscaped &amp;&amp; ch == '&quot;') {
<a name="183" href="#183">183</a>                 quoted = !quoted;
<a name="184" href="#184">184</a>             }
<a name="185" href="#185">185</a>             charEscaped = (!charEscaped &amp;&amp; ch == '&#92;&#92;');
<a name="186" href="#186">186</a>             i2++;
<a name="187" href="#187">187</a>             pos++;
<a name="188" href="#188">188</a> 
<a name="189" href="#189">189</a>         }
<a name="190" href="#190">190</a>         <strong class="jxr_keyword">return</strong> getToken(<strong class="jxr_keyword">true</strong>);
<a name="191" href="#191">191</a>     }
<a name="192" href="#192">192</a> 
<a name="193" href="#193">193</a>     <em class="jxr_javadoccomment">/**</em>
<a name="194" href="#194">194</a> <em class="jxr_javadoccomment">     * Returns &lt;tt&gt;true&lt;/tt&gt; if parameter names are to be converted to lower</em>
<a name="195" href="#195">195</a> <em class="jxr_javadoccomment">     * case when name/value pairs are parsed.</em>
<a name="196" href="#196">196</a> <em class="jxr_javadoccomment">     *</em>
<a name="197" href="#197">197</a> <em class="jxr_javadoccomment">     * @return &lt;tt&gt;true&lt;/tt&gt; if parameter names are to be</em>
<a name="198" href="#198">198</a> <em class="jxr_javadoccomment">     * converted to lower case when name/value pairs are parsed.</em>
<a name="199" href="#199">199</a> <em class="jxr_javadoccomment">     * Otherwise returns &lt;tt&gt;false&lt;/tt&gt;</em>
<a name="200" href="#200">200</a> <em class="jxr_javadoccomment">     */</em>
<a name="201" href="#201">201</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isLowerCaseNames() {
<a name="202" href="#202">202</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.lowerCaseNames;
<a name="203" href="#203">203</a>     }
<a name="204" href="#204">204</a> 
<a name="205" href="#205">205</a>     <em class="jxr_javadoccomment">/**</em>
<a name="206" href="#206">206</a> <em class="jxr_javadoccomment">     * Sets the flag if parameter names are to be converted to lower case when</em>
<a name="207" href="#207">207</a> <em class="jxr_javadoccomment">     * name/value pairs are parsed.</em>
<a name="208" href="#208">208</a> <em class="jxr_javadoccomment">     *</em>
<a name="209" href="#209">209</a> <em class="jxr_javadoccomment">     * @param b &lt;tt&gt;true&lt;/tt&gt; if parameter names are to be</em>
<a name="210" href="#210">210</a> <em class="jxr_javadoccomment">     * converted to lower case when name/value pairs are parsed.</em>
<a name="211" href="#211">211</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;false&lt;/tt&gt; otherwise.</em>
<a name="212" href="#212">212</a> <em class="jxr_javadoccomment">     */</em>
<a name="213" href="#213">213</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setLowerCaseNames(<strong class="jxr_keyword">boolean</strong> b) {
<a name="214" href="#214">214</a>         <strong class="jxr_keyword">this</strong>.lowerCaseNames = b;
<a name="215" href="#215">215</a>     }
<a name="216" href="#216">216</a> 
<a name="217" href="#217">217</a>     <em class="jxr_javadoccomment">/**</em>
<a name="218" href="#218">218</a> <em class="jxr_javadoccomment">     * Extracts a map of name/value pairs from the given string. Names are</em>
<a name="219" href="#219">219</a> <em class="jxr_javadoccomment">     * expected to be unique. Multiple separators may be specified and</em>
<a name="220" href="#220">220</a> <em class="jxr_javadoccomment">     * the earliest found in the input string is used.</em>