parameterparser.html

java 的上传功能很强大的实施上述事实上说是

<a name="221" href="#221">221</a> <em class="jxr_javadoccomment">     *</em>
<a name="222" href="#222">222</a> <em class="jxr_javadoccomment">     * @param str the string that contains a sequence of name/value pairs</em>
<a name="223" href="#223">223</a> <em class="jxr_javadoccomment">     * @param separators the name/value pairs separators</em>
<a name="224" href="#224">224</a> <em class="jxr_javadoccomment">     *</em>
<a name="225" href="#225">225</a> <em class="jxr_javadoccomment">     * @return a map of name/value pairs</em>
<a name="226" href="#226">226</a> <em class="jxr_javadoccomment">     */</em>
<a name="227" href="#227">227</a>     <strong class="jxr_keyword">public</strong> Map parse(<strong class="jxr_keyword">final</strong> String str, <strong class="jxr_keyword">char</strong>[] separators) {
<a name="228" href="#228">228</a>         <strong class="jxr_keyword">if</strong> (separators == <strong class="jxr_keyword">null</strong> || separators.length == 0) {
<a name="229" href="#229">229</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> HashMap();
<a name="230" href="#230">230</a>         }
<a name="231" href="#231">231</a>         <strong class="jxr_keyword">char</strong> separator = separators[0];
<a name="232" href="#232">232</a>         <strong class="jxr_keyword">if</strong> (str != <strong class="jxr_keyword">null</strong>) {
<a name="233" href="#233">233</a>             <strong class="jxr_keyword">int</strong> idx = str.length();
<a name="234" href="#234">234</a>             <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0;  i &lt; separators.length;  i++) {
<a name="235" href="#235">235</a>                 <strong class="jxr_keyword">int</strong> tmp = str.indexOf(separators[i]);
<a name="236" href="#236">236</a>                 <strong class="jxr_keyword">if</strong> (tmp != -1) {
<a name="237" href="#237">237</a>                     <strong class="jxr_keyword">if</strong> (tmp &lt; idx) {
<a name="238" href="#238">238</a>                         idx = tmp;
<a name="239" href="#239">239</a>                         separator = separators[i];
<a name="240" href="#240">240</a>                     }
<a name="241" href="#241">241</a>                 }
<a name="242" href="#242">242</a>             }
<a name="243" href="#243">243</a>         }
<a name="244" href="#244">244</a>         <strong class="jxr_keyword">return</strong> parse(str, separator);
<a name="245" href="#245">245</a>     }
<a name="246" href="#246">246</a> 
<a name="247" href="#247">247</a>     <em class="jxr_javadoccomment">/**</em>
<a name="248" href="#248">248</a> <em class="jxr_javadoccomment">     * Extracts a map of name/value pairs from the given string. Names are</em>
<a name="249" href="#249">249</a> <em class="jxr_javadoccomment">     * expected to be unique.</em>
<a name="250" href="#250">250</a> <em class="jxr_javadoccomment">     *</em>
<a name="251" href="#251">251</a> <em class="jxr_javadoccomment">     * @param str the string that contains a sequence of name/value pairs</em>
<a name="252" href="#252">252</a> <em class="jxr_javadoccomment">     * @param separator the name/value pairs separator</em>
<a name="253" href="#253">253</a> <em class="jxr_javadoccomment">     *</em>
<a name="254" href="#254">254</a> <em class="jxr_javadoccomment">     * @return a map of name/value pairs</em>
<a name="255" href="#255">255</a> <em class="jxr_javadoccomment">     */</em>
<a name="256" href="#256">256</a>     <strong class="jxr_keyword">public</strong> Map parse(<strong class="jxr_keyword">final</strong> String str, <strong class="jxr_keyword">char</strong> separator) {
<a name="257" href="#257">257</a>         <strong class="jxr_keyword">if</strong> (str == <strong class="jxr_keyword">null</strong>) {
<a name="258" href="#258">258</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> HashMap();
<a name="259" href="#259">259</a>         }
<a name="260" href="#260">260</a>         <strong class="jxr_keyword">return</strong> parse(str.toCharArray(), separator);
<a name="261" href="#261">261</a>     }
<a name="262" href="#262">262</a> 
<a name="263" href="#263">263</a>     <em class="jxr_javadoccomment">/**</em>
<a name="264" href="#264">264</a> <em class="jxr_javadoccomment">     * Extracts a map of name/value pairs from the given array of</em>
<a name="265" href="#265">265</a> <em class="jxr_javadoccomment">     * characters. Names are expected to be unique.</em>
<a name="266" href="#266">266</a> <em class="jxr_javadoccomment">     *</em>
<a name="267" href="#267">267</a> <em class="jxr_javadoccomment">     * @param chars the array of characters that contains a sequence of</em>
<a name="268" href="#268">268</a> <em class="jxr_javadoccomment">     * name/value pairs</em>
<a name="269" href="#269">269</a> <em class="jxr_javadoccomment">     * @param separator the name/value pairs separator</em>
<a name="270" href="#270">270</a> <em class="jxr_javadoccomment">     *</em>
<a name="271" href="#271">271</a> <em class="jxr_javadoccomment">     * @return a map of name/value pairs</em>
<a name="272" href="#272">272</a> <em class="jxr_javadoccomment">     */</em>
<a name="273" href="#273">273</a>     <strong class="jxr_keyword">public</strong> Map parse(<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">char</strong>[] chars, <strong class="jxr_keyword">char</strong> separator) {
<a name="274" href="#274">274</a>         <strong class="jxr_keyword">if</strong> (chars == <strong class="jxr_keyword">null</strong>) {
<a name="275" href="#275">275</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> HashMap();
<a name="276" href="#276">276</a>         }
<a name="277" href="#277">277</a>         <strong class="jxr_keyword">return</strong> parse(chars, 0, chars.length, separator);
<a name="278" href="#278">278</a>     }
<a name="279" href="#279">279</a> 
<a name="280" href="#280">280</a>     <em class="jxr_javadoccomment">/**</em>
<a name="281" href="#281">281</a> <em class="jxr_javadoccomment">     * Extracts a map of name/value pairs from the given array of</em>
<a name="282" href="#282">282</a> <em class="jxr_javadoccomment">     * characters. Names are expected to be unique.</em>
<a name="283" href="#283">283</a> <em class="jxr_javadoccomment">     *</em>
<a name="284" href="#284">284</a> <em class="jxr_javadoccomment">     * @param chars the array of characters that contains a sequence of</em>
<a name="285" href="#285">285</a> <em class="jxr_javadoccomment">     * name/value pairs</em>
<a name="286" href="#286">286</a> <em class="jxr_javadoccomment">     * @param offset - the initial offset.</em>
<a name="287" href="#287">287</a> <em class="jxr_javadoccomment">     * @param length - the length.</em>
<a name="288" href="#288">288</a> <em class="jxr_javadoccomment">     * @param separator the name/value pairs separator</em>
<a name="289" href="#289">289</a> <em class="jxr_javadoccomment">     *</em>
<a name="290" href="#290">290</a> <em class="jxr_javadoccomment">     * @return a map of name/value pairs</em>
<a name="291" href="#291">291</a> <em class="jxr_javadoccomment">     */</em>
<a name="292" href="#292">292</a>     <strong class="jxr_keyword">public</strong> Map parse(
<a name="293" href="#293">293</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">char</strong>[] chars,
<a name="294" href="#294">294</a>         <strong class="jxr_keyword">int</strong> offset,
<a name="295" href="#295">295</a>         <strong class="jxr_keyword">int</strong> length,
<a name="296" href="#296">296</a>         <strong class="jxr_keyword">char</strong> separator) {
<a name="297" href="#297">297</a> 
<a name="298" href="#298">298</a>         <strong class="jxr_keyword">if</strong> (chars == <strong class="jxr_keyword">null</strong>) {
<a name="299" href="#299">299</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> HashMap();
<a name="300" href="#300">300</a>         }
<a name="301" href="#301">301</a>         HashMap params = <strong class="jxr_keyword">new</strong> HashMap();
<a name="302" href="#302">302</a>         <strong class="jxr_keyword">this</strong>.chars = chars;
<a name="303" href="#303">303</a>         <strong class="jxr_keyword">this</strong>.pos = offset;
<a name="304" href="#304">304</a>         <strong class="jxr_keyword">this</strong>.len = length;
<a name="305" href="#305">305</a> 
<a name="306" href="#306">306</a>         String paramName = <strong class="jxr_keyword">null</strong>;
<a name="307" href="#307">307</a>         String paramValue = <strong class="jxr_keyword">null</strong>;
<a name="308" href="#308">308</a>         <strong class="jxr_keyword">while</strong> (hasChar()) {
<a name="309" href="#309">309</a>             paramName = parseToken(<strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">char</strong>[] {
<a name="310" href="#310">310</a>                     '=', separator });
<a name="311" href="#311">311</a>             paramValue = <strong class="jxr_keyword">null</strong>;
<a name="312" href="#312">312</a>             <strong class="jxr_keyword">if</strong> (hasChar() &amp;&amp; (chars[pos] == '=')) {
<a name="313" href="#313">313</a>                 pos++; <em class="jxr_comment">// skip '='</em>
<a name="314" href="#314">314</a>                 paramValue = parseQuotedToken(<strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">char</strong>[] {
<a name="315" href="#315">315</a>                         separator });
<a name="316" href="#316">316</a>             }
<a name="317" href="#317">317</a>             <strong class="jxr_keyword">if</strong> (hasChar() &amp;&amp; (chars[pos] == separator)) {
<a name="318" href="#318">318</a>                 pos++; <em class="jxr_comment">// skip separator</em>
<a name="319" href="#319">319</a>             }
<a name="320" href="#320">320</a>             <strong class="jxr_keyword">if</strong> ((paramName != <strong class="jxr_keyword">null</strong>) &amp;&amp; (paramName.length() &gt; 0)) {
<a name="321" href="#321">321</a>                 <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.lowerCaseNames) {
<a name="322" href="#322">322</a>                     paramName = paramName.toLowerCase();
<a name="323" href="#323">323</a>                 }
<a name="324" href="#324">324</a>                 params.put(paramName, paramValue);
<a name="325" href="#325">325</a>             }
<a name="326" href="#326">326</a>         }
<a name="327" href="#327">327</a>         <strong class="jxr_keyword">return</strong> params;
<a name="328" href="#328">328</a>     }
<a name="329" href="#329">329</a> }
</pre>
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