1、错误描写叙述

六月 03, 2014 11:00:35 下午 freemarker.log.JDK14LoggerFactory$JDK14Logger error严重: Template processing error: "Expression nums is undefined on line 10, column 25 in list.ftl."Expression nums is undefined on line 10, column 25 in list.ftl.The problematic instruction:----------==> assignment: nums1=nums[1..10] [on line 10, column 10 in list.ftl]----------Java backtrace for programmers:----------freemarker.core.InvalidReferenceException: Expression nums is undefined on line 10, column 25 in list.ftl.	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:125)	at freemarker.core.DynamicKeyName._getAsTemplateModel(DynamicKeyName.java:75)	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)	at freemarker.core.Assignment.accept(Assignment.java:90)	at freemarker.core.Environment.visit(Environment.java:221)	at freemarker.core.MixedContent.accept(MixedContent.java:92)	at freemarker.core.Environment.visit(Environment.java:221)	at freemarker.core.Environment.process(Environment.java:199)	at freemarker.template.Template.process(Template.java:259)	at com.you.freemarker.FreemarkerTemplate.printFtl(FreemarkerTemplate.java:77)	at com.you.test.freemarker.FreemarkerTest.studentPrint(FreemarkerTest.java:203)	at com.you.test.freemarker.FreemarkerTest.testList(FreemarkerTest.java:190)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)      
                    Expression nums is undefined on line 10, column 25 in list.ftl.The problematic instruction:----------==> assignment: nums1=nums[1..10] [on line 10, column 10 in list.ftl]----------Java backtrace for programmers:----------freemarker.core.InvalidReferenceException: Expression nums is undefined on line 10, column 25 in list.ftl.	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:125)	at freemarker.core.DynamicKeyName._getAsTemplateModel(DynamicKeyName.java:75)	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)	at freemarker.core.Assignment.accept(Assignment.java:90)	at freemarker.core.Environment.visit(Environment.java:221)	at freemarker.core.MixedContent.accept(MixedContent.java:92)	at freemarker.core.Environment.visit(Environment.java:221)	at freemarker.core.Environment.process(Environment.java:199)	at freemarker.template.Template.process(Template.java:259)	at com.you.freemarker.FreemarkerTemplate.printFtl(FreemarkerTemplate.java:77)	at com.you.test.freemarker.FreemarkerTest.studentPrint(FreemarkerTest.java:203)	at com.you.test.freemarker.FreemarkerTest.testList(FreemarkerTest.java:190)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)Expression nums is undefined on line 10, column 25 in list.ftl.The problematic instruction:----------==> assignment: nums1=nums[1..10] [on line 10, column 10 in list.ftl]----------Java backtrace for programmers:----------freemarker.core.InvalidReferenceException: Expression nums is undefined on line 10, column 25 in list.ftl.	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:125)	at freemarker.core.DynamicKeyName._getAsTemplateModel(DynamicKeyName.java:75)	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)	at freemarker.core.Assignment.accept(Assignment.java:90)	at freemarker.core.Environment.visit(Environment.java:221)	at freemarker.core.MixedContent.accept(MixedContent.java:92)	at freemarker.core.Environment.visit(Environment.java:221)	at freemarker.core.Environment.process(Environment.java:199)	at freemarker.template.Template.process(Template.java:259)	at com.you.freemarker.FreemarkerTemplate.printFtl(FreemarkerTemplate.java:77)	at com.you.test.freemarker.FreemarkerTest.studentPrint(FreemarkerTest.java:203)	at com.you.test.freemarker.FreemarkerTest.testList(FreemarkerTest.java:190)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

2、错误原因

     nums没有定义

<#--freemarker序列的拆分-->	 <#assign nums1=nums[1..10]>	 <#list nums1 as num>	 	${num}	 
     

3、解决的方法