异常-----freemarker.core.NonStringException
一，案例一
1.1、错误描述
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>freemarker基本数据类型</title>
</head>
<body>
张三丰
123,456
Error on line 20, column 8 in type.ftl
Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
The problematic instruction:
----------
==> ${flag} [on line 20, column 6 in type.ftl]
----------
Java backtrace for programmers:
----------
freemarker.core.NonStringException: Error on line 20, column 8 in type.ftl
Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
at freemarker.core.Expression.getStringValue(Expression.java:126)
at freemarker.core.Expression.getStringValue(Expression.java:93)
at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
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: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$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
五月 30, 2014 11:23:18 下午 freemarker.log.JDK14LoggerFactory$JDK14Logger error
严重: Template processing error: "Error on line 20, column 8 in type.ftl\nExpecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2"
Error on line 20, column 8 in type.ftl
Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
The problematic instruction:
----------
==> ${flag} [on line 20, column 6 in type.ftl]
----------
Java backtrace for programmers:
----------
freemarker.core.NonStringException: Error on line 20, column 8 in type.ftl
Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
at freemarker.core.Expression.getStringValue(Expression.java:126)
at freemarker.core.Expression.getStringValue(Expression.java:93)
at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
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: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)
Error on line 20, column 8 in type.ftl
Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
The problematic instruction:
----------
==> ${flag} [on line 20, column 6 in type.ftl]
----------
Java backtrace for programmers:
----------
freemarker.core.NonStringException: Error on line 20, column 8 in type.ftl
Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
at freemarker.core.Expression.getStringValue(Expression.java:126)
at freemarker.core.Expression.getStringValue(Expression.java:93)
at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
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: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)
1.2、错误原因
<#--定义布尔值-->
<#assign flag = true/>
${flag}
不能直接输出除了字符串和数字之外的类型，否则会报错
1.3、解决办法
将布尔类型转换为字符串输出，使用${XXX?string}转换
<#--定义布尔值-->
<#assign flag = true/>
${flag?string}
结果：true
二，案例二
2.1，错误描述
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>freemarker</title>
</head>
<body>
Error on line 12, column 12 in list.ftl
Expecting a string, date or number here, Expression num is instead a freemarker.core.NumericalRange
The problematic instruction:
----------
==> ${num} [on line 12, column 10 in list.ftl]
----------
Java backtrace for programmers:
----------
freemarker.core.NonStringException: Error on line 12, column 12 in list.ftl
Expecting a string, date or number here, Expression num is instead a freemarker.core.NumericalRange
at freemarker.core.Expression.getStringValue(Expression.java:126)
at freemarker.core.Expression.getStringValue(Expression.java:93)
at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179)
at freemarker.core.Environment.visit(Environment.java:428)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
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$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
六月 03, 2014 10:30:40 下午 freemarker.log.JDK14LoggerFactory$JDK14Logger error
严重: Template processing error: "Error on line 12, column 12 in list.ftl\nExpecting a string, date or number here, Expression num is instead a freemarker.core.NumericalRange"
Error on line 12, column 12 in list.ftl
Expecting a string, date or number here, Expression num is instead a freemarker.core.NumericalRange
The problematic instruction:
----------
==> ${num} [on line 12, column 10 in list.ftl]
----------
Java backtrace for programmers:
----------
freemarker.core.NonStringException: Error on line 12, column 12 in list.ftl
Expecting a string, date or number here, Expression num is instead a freemarker.core.NumericalRange
at freemarker.core.Expression.getStringValue(Expression.java:126)
at freemarker.core.Expression.getStringValue(Expression.java:93)
at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179)
at freemarker.core.Environment.visit(Environment.java:428)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
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)
Error on line 12, column 12 in list.ftl
Expecting a string, date or number here, Expression num is instead a freemarker.core.NumericalRange
The problematic instruction:
----------
==> ${num} [on line 12, column 10 in list.ftl]
----------
Java backtrace for programmers:
----------
freemarker.core.NonStringException: Error on line 12, column 12 in list.ftl
Expecting a string, date or number here, Expression num is instead a freemarker.core.NumericalRange
at freemarker.core.Expression.getStringValue(Expression.java:126)
at freemarker.core.Expression.getStringValue(Expression.java:93)
at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179)
at freemarker.core.Environment.visit(Environment.java:428)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
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)
2.2、错误原因
<#--freemarker定义了一个连续的序列-->
<#assign nums=[1..100]/>
<#list nums as num>
${num}
</#list>
2.3、解决办法
去掉中括号，这样定义连续的序列：nums=1..100
1、错误描述
- <html>
- <head>
- <meta http-equiv="content-type" content="text/html; charset=UTF-8">
- <title>freemarker基本数据类型</title>
- </head>
- <body>
- 张三丰
- 123,456
- Error on line 20, column 8 in type.ftl
- Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
- The problematic instruction:
- ----------
- ==> ${flag} [on line 20, column 6 in type.ftl]
- ----------
- Java backtrace for programmers:
- ----------
- freemarker.core.NonStringException: Error on line 20, column 8 in type.ftl
- Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
- at freemarker.core.Expression.getStringValue(Expression.java:126)
- at freemarker.core.Expression.getStringValue(Expression.java:93)
- at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
- 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: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$2.evaluate(ParentRunner.java:222)
- at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
- at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
- at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
- at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
- at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
- at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
- at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
- 五月 30, 2014 11:23:18 下午 freemarker.log.JDK14LoggerFactory$JDK14Logger error
- 严重: Template processing error: "Error on line 20, column 8 in type.ftl\nExpecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2"
- Error on line 20, column 8 in type.ftl
- Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
- The problematic instruction:
- ----------
- ==> ${flag} [on line 20, column 6 in type.ftl]
- ----------
- Java backtrace for programmers:
- ----------
- freemarker.core.NonStringException: Error on line 20, column 8 in type.ftl
- Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
- at freemarker.core.Expression.getStringValue(Expression.java:126)
- at freemarker.core.Expression.getStringValue(Expression.java:93)
- at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
- 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: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)
- Error on line 20, column 8 in type.ftl
- Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
- The problematic instruction:
- ----------
- ==> ${flag} [on line 20, column 6 in type.ftl]
- ----------
- Java backtrace for programmers:
- ----------
- freemarker.core.NonStringException: Error on line 20, column 8 in type.ftl
- Expecting a string, date or number here, Expression flag is instead a freemarker.template.TemplateBooleanModel$2
- at freemarker.core.Expression.getStringValue(Expression.java:126)
- at freemarker.core.Expression.getStringValue(Expression.java:93)
- at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
- 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: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
- <#--定义布尔值-->
- <#assign flag = true/>
- ${flag}
不能直接输出除了字符串和数字之外的类型，否则会报错
3、解决办法
将布尔类型转换为字符串输出，使用${XXX?string}转换
- <#--定义布尔值-->
- <#assign flag = true/>
- ${flag?string}
结果：true
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