我想用Ext GWT 2.0构建一个基于AJAX的web应用程序。在尝试使用GXT BeanModel类时，我遇到了一个障碍。分机GWT 2.2.1和GWT 2.1.1
实质上，我试图沿着@BEAN注释使用BeanModelMarker来定义一个BeanModel对象。
在编译时，我得到以下错误：
[ERROR] Class com.extjs.gxt.ui.client.data.BeanModelLookup not found. [java] com.google.gwt.core.ext.typeinfo.NotFoundException: [JAVA BEAN CLASS NAME HERE] [java] at com.google.gwt.core.ext.typeinfo.TypeOracle.getType(TypeOracle.java:534) [java] at com.extjs.gxt.ui.rebind.core.BeanModelGenerator.getMarkerBean(BeanModelGenerator.java:188) [java] at com.extjs.gxt.ui.rebind.core.BeanModelGenerator.generate(BeanModelGenerator.java:55) [java] at com.google.gwt.dev.javac.StandardGeneratorContext.runGenerator(StandardGeneratorContext.java:427) [java] at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:39) [java] at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.tryRebind(StandardRebindOracle.java:115) [java] at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:58) [java] at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:161) [java] at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:150) [java] at com.google.gwt.dev.Precompile$DistillerRebindPermutationOracle.getAllPossibleRebindAnswers(Precompile.java:345) [java] at com.google.gwt.dev.jdt.WebModeCompilerFrontEnd.doFindAdditionalTypesUsingRebinds(WebModeCompilerFrontEnd.java:106) [java] at com.google.gwt.dev.jdt.AbstractCompiler$Sandbox$CompilerImpl.process(AbstractCompiler.java:254) [java] at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:444) [java] at com.google.gwt.dev.jdt.AbstractCompiler$Sandbox$CompilerImpl.compile(AbstractCompiler.java:175) [java] at com.google.gwt.dev.jdt.AbstractCompiler$Sandbox$CompilerImpl.compile(AbstractCompiler.java:288) [java] at com.google.gwt.dev.jdt.AbstractCompiler$Sandbox$CompilerImpl.access$400(AbstractCompiler.java:145) [java] at com.google.gwt.dev.jdt.AbstractCompiler.compile(AbstractCompiler.java:632) [java] at com.google.gwt.dev.jdt.BasicWebModeCompiler.getCompilationUnitDeclarations(BasicWebModeCompiler.java:124) [java] at com.google.gwt.dev.jdt.WebModeCompilerFrontEnd.getCompilationUnitDeclarations(WebModeCompilerFrontEnd.java:54) [java] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.precompile(JavaToJavaScriptCompiler.java:484) [java] at com.google.gwt.dev.jjs.JavaScriptCompiler.precompile(JavaScriptCompiler.java:32) [java] at com.google.gwt.dev.Precompile.precompile(Precompile.java:545) [java] at com.google.gwt.dev.Precompile.precompile(Precompile.java:466) [java] at com.google.gwt.dev.Compiler.run(Compiler.java:205) [java] at com.google.gwt.dev.Compiler.run(Compiler.java:177) [java] at com.google.gwt.dev.Compiler$1.run(Compiler.java:149) [java] at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:87) [java] at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:81) [java] at com.google.gwt.dev.Compiler.main(Compiler.java:156) [java] [ERROR] Errors in 'jar:[FILE PATH]/gxt.jar!/com/extjs/gxt/ui/client/data/BeanModelLookup.java' [java] [ERROR] Line 34: Failed to resolve 'com.extjs.gxt.ui.client.data.BeanModelLookup' via deferred binding [java] [ERROR] Cannot proceed due to previous errors