异常-----freemarker.core.ParseException: Encountered "string"
1、错误描述
freemarker.core.ParseException: Encountered "string" at line 21, column 21 in type.ftl. Was expecting one of: "}" ... "." ... "[" ... "(" ... "?" ... "!" ... <TERMINATING_EXCLAM> ... "??" ... "+" ... "-" ... "*" ... "/" ... "%" ... "!=" ... "=" ... "==" ... ">=" ... <ESCAPED_GTE> ... ">" ... <ESCAPED_GT> ... <LESS_THAN_EQUALS> ... <LESS_THAN> ... ".." ... <AND> ... <OR> ... at freemarker.core.FMParser.generateParseException(FMParser.java:4702) at freemarker.core.FMParser.jj_consume_token(FMParser.java:4573) at freemarker.core.FMParser.StringOutput(FMParser.java:1070) at freemarker.core.FMParser.Content(FMParser.java:2580) at freemarker.core.FMParser.OptionalBlock(FMParser.java:2791) at freemarker.core.FMParser.Root(FMParser.java:2963) at freemarker.template.Template.<init>(Template.java:171) at freemarker.cache.TemplateCache.loadTemplate(TemplateCache.java:447) at freemarker.cache.TemplateCache.getTemplate(TemplateCache.java:360) at freemarker.cache.TemplateCache.getTemplate(TemplateCache.java:235) at freemarker.template.Configuration.getTemplate(Configuration.java:578) at freemarker.template.Configuration.getTemplate(Configuration.java:543) at com.you.freemarker.FreemarkerTemplate.getTemplate(FreemarkerTemplate.java:52) at com.you.freemarker.FreemarkerTemplate.printFtl(FreemarkerTemplate.java:76) at com.you.test.freemarker.FreemarkerTest.studentPrint(FreemarkerTest.java:172) at com.you.test.freemarker.FreemarkerTest.testDataType(FreemarkerTest.java:159) 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
${(num.color)??string}
“??”出现错误,不符合freemarker中的语法规定
3、解决办法
将“??”修改成符合freemarker语法的“???”
${(num.color)???string}
结果:false
4,原因
前连个问号是判断是否存在,后面一个问号是让它以String的类型输出
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