propertymessageresources.html

sturts_menu 的源代码 主要提过了常用的menu菜单样式

<a name="146" href="#146">146</a> 
<a name="147" href="#147">147</a>             <em class="comment">// Load this Locale's messages if we have not done so yet</em>
<a name="148" href="#148">148</a>             loadLocale(localeKey);
<a name="149" href="#149">149</a> 
<a name="150" href="#150">150</a>             <em class="comment">// Check if we have this key for the current locale key</em>
<a name="151" href="#151">151</a>             messageKey = messageKey(localeKey, key);
<a name="152" href="#152">152</a>             <strong>synchronized</strong> (messages) {
<a name="153" href="#153">153</a>                 message = (String) messages.get(messageKey);
<a name="154" href="#154">154</a>                 <strong>if</strong> (message != <strong>null</strong>) {
<a name="155" href="#155">155</a>                     <strong>if</strong> (addIt) {
<a name="156" href="#156">156</a>                         messages.put(originalKey, message);
<a name="157" href="#157">157</a>                     }
<a name="158" href="#158">158</a>                     <strong>return</strong> (message);
<a name="159" href="#159">159</a>                 }
<a name="160" href="#160">160</a>             }
<a name="161" href="#161">161</a> 
<a name="162" href="#162">162</a>             <em class="comment">// Strip trailing modifiers to try a more general locale key</em>
<a name="163" href="#163">163</a>             addIt = <strong>true</strong>;
<a name="164" href="#164">164</a>             underscore = localeKey.lastIndexOf(<span class="string">"_"</span>);
<a name="165" href="#165">165</a>             <strong>if</strong> (underscore &lt; 0) {
<a name="166" href="#166">166</a>                 <strong>break</strong>;
<a name="167" href="#167">167</a>             }
<a name="168" href="#168">168</a>             localeKey = localeKey.substring(0, underscore);
<a name="169" href="#169">169</a> 
<a name="170" href="#170">170</a>         }
<a name="171" href="#171">171</a> 
<a name="172" href="#172">172</a>         <em class="comment">// Try the default locale if the current locale is different</em>
<a name="173" href="#173">173</a>         <strong>if</strong> (!defaultLocale.equals(locale)) {
<a name="174" href="#174">174</a>             localeKey = localeKey(defaultLocale);
<a name="175" href="#175">175</a>             messageKey = messageKey(localeKey, key);
<a name="176" href="#176">176</a>             loadLocale(localeKey);
<a name="177" href="#177">177</a>             <strong>synchronized</strong> (messages) {
<a name="178" href="#178">178</a>                 message = (String) messages.get(messageKey);
<a name="179" href="#179">179</a>                 <strong>if</strong> (message != <strong>null</strong>) {
<a name="180" href="#180">180</a>                     messages.put(originalKey, message);
<a name="181" href="#181">181</a>                     <strong>return</strong> (message);
<a name="182" href="#182">182</a>                 }
<a name="183" href="#183">183</a>             }
<a name="184" href="#184">184</a>         }
<a name="185" href="#185">185</a> 
<a name="186" href="#186">186</a>         <em class="comment">// As a last resort, try the default Locale</em>
<a name="187" href="#187">187</a>         localeKey = <span class="string">""</span>;
<a name="188" href="#188">188</a>         messageKey = messageKey(localeKey, key);
<a name="189" href="#189">189</a>         loadLocale(localeKey);
<a name="190" href="#190">190</a>         <strong>synchronized</strong> (messages) {
<a name="191" href="#191">191</a>             message = (String) messages.get(messageKey);
<a name="192" href="#192">192</a>             <strong>if</strong> (message != <strong>null</strong>) {
<a name="193" href="#193">193</a>                 messages.put(originalKey, message);
<a name="194" href="#194">194</a>                 <strong>return</strong> (message);
<a name="195" href="#195">195</a>             }
<a name="196" href="#196">196</a>         }
<a name="197" href="#197">197</a> 
<a name="198" href="#198">198</a>         <em class="comment">// Return an appropriate error indication</em>
<a name="199" href="#199">199</a>         <strong>if</strong> (returnNull) {
<a name="200" href="#200">200</a>             <strong>return</strong> (<strong>null</strong>);
<a name="201" href="#201">201</a>         } <strong>else</strong> {
<a name="202" href="#202">202</a>             <strong>return</strong> (<span class="string">"???"</span> + messageKey(locale, key) + <span class="string">"???"</span>);
<a name="203" href="#203">203</a>         }
<a name="204" href="#204">204</a> 
<a name="205" href="#205">205</a>     }
<a name="206" href="#206">206</a> 
<a name="207" href="#207">207</a> 
<a name="208" href="#208">208</a>     <em class="comment">// ------------------------------------------------------ Protected Methods</em>
<a name="209" href="#209">209</a> 
<a name="210" href="#210">210</a> 
<a name="211" href="#211">211</a>     <em>/**</em>
<a name="212" href="#212">212</a> <em>     * Load the messages associated with the specified Locale key.  For this</em>
<a name="213" href="#213">213</a> <em>     * implementation, the &lt;code>config&lt;/code> property should contain a fully</em>
<a name="214" href="#214">214</a> <em>     * qualified package and resource name, separated by periods, of a series</em>
<a name="215" href="#215">215</a> <em>     * of property resources to be loaded from the class loader that created</em>
<a name="216" href="#216">216</a> <em>     * this PropertyMessageResources instance.  This is exactly the same name</em>
<a name="217" href="#217">217</a> <em>     * format you would use when utilizing the</em>
<a name="218" href="#218">218</a> <em>     * &lt;code>java.util.PropertyResourceBundle&lt;/code> class.</em>
<a name="219" href="#219">219</a> <em>     *</em>
<a name="220" href="#220">220</a> <em>     * @param localeKey Locale key for the messages to be retrieved</em>
<a name="221" href="#221">221</a> <em>     */</em>
<a name="222" href="#222">222</a>     <strong>protected</strong> <strong>synchronized</strong> <strong>void</strong> loadLocale(String localeKey) {
<a name="223" href="#223">223</a> 
<a name="224" href="#224">224</a>         <strong>if</strong> (log.isTraceEnabled()) {
<a name="225" href="#225">225</a>             log.trace(<span class="string">"loadLocale("</span> + localeKey + <span class="string">")"</span>);
<a name="226" href="#226">226</a>         }
<a name="227" href="#227">227</a>         
<a name="228" href="#228">228</a>         <em class="comment">// Have we already attempted to load messages for this locale?</em>
<a name="229" href="#229">229</a>         <strong>if</strong> (locales.get(localeKey) != <strong>null</strong>) {
<a name="230" href="#230">230</a>             <strong>return</strong>;
<a name="231" href="#231">231</a>         }
<a name="232" href="#232">232</a>         
<a name="233" href="#233">233</a>         locales.put(localeKey, localeKey);
<a name="234" href="#234">234</a> 
<a name="235" href="#235">235</a>         <em class="comment">// Set up to load the property resource for this locale key, if we can</em>
<a name="236" href="#236">236</a>         String name = config.replace('.', '/');
<a name="237" href="#237">237</a>         <strong>if</strong> (localeKey.length() > 0) {
<a name="238" href="#238">238</a>             name += <span class="string">"_"</span> + localeKey;
<a name="239" href="#239">239</a>         }
<a name="240" href="#240">240</a>         
<a name="241" href="#241">241</a>         name += <span class="string">".properties"</span>;
<a name="242" href="#242">242</a>         InputStream is = <strong>null</strong>;
<a name="243" href="#243">243</a>         Properties props = <strong>new</strong> Properties();
<a name="244" href="#244">244</a> 
<a name="245" href="#245">245</a>         <em class="comment">// Load the specified property resource</em>
<a name="246" href="#246">246</a>         <strong>if</strong> (log.isTraceEnabled()) {
<a name="247" href="#247">247</a>             log.trace(<span class="string">"  Loading resource '"</span> + name + <span class="string">"'"</span>);
<a name="248" href="#248">248</a>         }
<a name="249" href="#249">249</a>         
<a name="250" href="#250">250</a>         ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
<a name="251" href="#251">251</a>         <strong>if</strong> (classLoader == <strong>null</strong>) {
<a name="252" href="#252">252</a>             classLoader = <strong>this</strong>.getClass().getClassLoader();
<a name="253" href="#253">253</a>         }
<a name="254" href="#254">254</a>         
<a name="255" href="#255">255</a>         is = classLoader.getResourceAsStream(name);
<a name="256" href="#256">256</a>         <strong>if</strong> (is != <strong>null</strong>) {
<a name="257" href="#257">257</a>             <strong>try</strong> {
<a name="258" href="#258">258</a>                 props.load(is);
<a name="259" href="#259">259</a>                 
<a name="260" href="#260">260</a>             } <strong>catch</strong> (IOException e) {
<a name="261" href="#261">261</a>                 log.error(<span class="string">"loadLocale()"</span>, e);
<a name="262" href="#262">262</a>             } <strong>finally</strong> {
<a name="263" href="#263">263</a>                 <strong>try</strong> {
<a name="264" href="#264">264</a>                     is.close();
<a name="265" href="#265">265</a>                 } <strong>catch</strong> (IOException e) {
<a name="266" href="#266">266</a>                     log.error(<span class="string">"loadLocale()"</span>, e);
<a name="267" href="#267">267</a>                 }
<a name="268" href="#268">268</a>             }
<a name="269" href="#269">269</a>         }
<a name="270" href="#270">270</a>         
<a name="271" href="#271">271</a>         <strong>if</strong> (log.isTraceEnabled()) {
<a name="272" href="#272">272</a>             log.trace(<span class="string">"  Loading resource completed"</span>);
<a name="273" href="#273">273</a>         }
<a name="274" href="#274">274</a> 
<a name="275" href="#275">275</a>         <em class="comment">// Copy the corresponding values into our cache</em>
<a name="276" href="#276">276</a>         <strong>if</strong> (props.size() &lt; 1) {
<a name="277" href="#277">277</a>             <strong>return</strong>;
<a name="278" href="#278">278</a>         }
<a name="279" href="#279">279</a>         
<a name="280" href="#280">280</a>         <strong>synchronized</strong> (messages) {
<a name="281" href="#281">281</a>             Iterator names = props.keySet().iterator();
<a name="282" href="#282">282</a>             <strong>while</strong> (names.hasNext()) {
<a name="283" href="#283">283</a>                 String key = (String) names.next();
<a name="284" href="#284">284</a>                 <strong>if</strong> (log.isTraceEnabled()) {
<a name="285" href="#285">285</a>                     log.trace(<span class="string">"  Saving message key '"</span> + messageKey(localeKey, key));
<a name="286" href="#286">286</a>                 }
<a name="287" href="#287">287</a>                 messages.put(messageKey(localeKey, key), props.getProperty(key));
<a name="288" href="#288">288</a>             }
<a name="289" href="#289">289</a>         }
<a name="290" href="#290">290</a> 
<a name="291" href="#291">291</a>     }
<a name="292" href="#292">292</a> 
<a name="293" href="#293">293</a> 
<a name="294" href="#294">294</a> }
</pre>
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