1、错误描述

 六月 26, 2014 11:26:27 下午 freemarker.log.JDK14LoggerFactory$JDK14Logger error
 严重: Template processing error: "Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl."

 Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
 The problematic instruction:
 ----------
 ==> list datas as data [on line 7, column 11 in inc/select.ftl]
  in user-directive items.select [on line 14, column 6 in address.ftl]
 ----------

 Java backtrace for programmers:
 ----------
 freemarker.template.TemplateException: Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
     at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:136)
     at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:190)
     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.Macro$Context.runMacro(Macro.java:172)
     at freemarker.core.Environment.visit(Environment.java:614)
     at freemarker.core.UnifiedCall.accept(UnifiedCall.java:106)
     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:267)
     at com.you.test.freemarker.FreemarkerTest.testSelect(FreemarkerTest.java:253)
     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)

 <html>
   <head>
     <meta http-equiv="content-type" content="text/html; charset=UTF-8">
     <title>freemarker 下拉框</title>

   </head>

   <body>
           <select id="city" name="city">
           <option>---请选择---</option>
                  <option value="武汉市">武汉市</option>
                  <option value="黄石市">黄石市</option>
                  <option value="黄冈市">黄冈市</option>
                  <option value="荆州市">荆州市</option>
      </select>
      <select id="zhuanye" name="zhuanye">
           <option>---请选择---</option>
                  <option value="请选择专业">请选择专业</option>
                      <option value="计算机科学与技术" selected>计算机科学与技术</option>
                  <option value="物流工程">物流工程</option>
                  <option value="英语专业">英语专业</option>
      </select>
      <select id="user" name="user">
           <option>---请选择---</option>
                    <option value="1">张三丰</option>
                    <option value="2">李思思</option>
                    <option value="3">赵武</option>
                    <option value="4">刘雪</option>
                    <option value="5">朱顾</option>
                    <option value="6">赵武</option>
                    <option value="7">吴语</option>
                    <option value="8">血玉</option>
      </select>
      <select id="username" name="username">
           <option>---请选择---</option>
                <option value="0">其他</option>
                    <option value="1">张三丰</option>
                    <option value="2">李思思</option>
                    <option value="3">赵武</option>
                    <option value="4">刘雪</option>
                    <option value="5">朱顾</option>
                    <option value="6">赵武</option>
                    <option value="7">吴语</option>
                    <option value="8">血玉</option>
      </select>
      <select id="sex" name="sex">
           <option>---请选择---</option>

 Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
 The problematic instruction:
 ----------
 ==> list datas as data [on line 7, column 11 in inc/select.ftl]
  in user-directive items.select [on line 14, column 6 in address.ftl]
 ----------

 Java backtrace for programmers:
 ----------
 freemarker.template.TemplateException: Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
     at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:136)
     at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:190)
     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.Macro$Context.runMacro(Macro.java:172)
     at freemarker.core.Environment.visit(Environment.java:614)
     at freemarker.core.UnifiedCall.accept(UnifiedCall.java:106)
     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:267)
     at com.you.test.freemarker.FreemarkerTest.testSelect(FreemarkerTest.java:253)
     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)

 Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
 The problematic instruction:
 ----------
 ==> list datas as data [on line 7, column 11 in inc/select.ftl]
  in user-directive items.select [on line 14, column 6 in address.ftl]
 ----------

 Java backtrace for programmers:
 ----------
 freemarker.template.TemplateException: Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
     at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:136)
     at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:190)
     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.Macro$Context.runMacro(Macro.java:172)
     at freemarker.core.Environment.visit(Environment.java:614)
     at freemarker.core.UnifiedCall.accept(UnifiedCall.java:106)
     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:267)
     at com.you.test.freemarker.FreemarkerTest.testSelect(FreemarkerTest.java:253)
     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$2.evaluate(ParentRunner.java:222)
     at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
     at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
 六月 26, 2014 11:26:27 下午 freemarker.log.JDK14LoggerFactory$JDK14Logger error
 严重: Template processing error: "Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl."

 Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
 The problematic instruction:
 ----------
 ==> list datas as data [on line 7, column 11 in inc/select.ftl]
  in user-directive items.select [on line 14, column 6 in address.ftl]
 ----------

 Java backtrace for programmers:
 ----------
 freemarker.template.TemplateException: Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
     at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:136)
     at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:190)
     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.Macro$Context.runMacro(Macro.java:172)
     at freemarker.core.Environment.visit(Environment.java:614)
     at freemarker.core.UnifiedCall.accept(UnifiedCall.java:106)
     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.printFile(FreemarkerTemplate.java:109)
     at com.you.test.freemarker.FreemarkerTest.studentFile(FreemarkerTest.java:281)
     at com.you.test.freemarker.FreemarkerTest.testSelect(FreemarkerTest.java:254)
     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)

 Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
 The problematic instruction:
 ----------
 ==> list datas as data [on line 7, column 11 in inc/select.ftl]
  in user-directive items.select [on line 14, column 6 in address.ftl]
 ----------

 Java backtrace for programmers:
 ----------
 freemarker.template.TemplateException: Expected collection or sequence. datas evaluated instead to freemarker.core.HashLiteral$SequenceHash on line 7, column 18 in inc/select.ftl.
     at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:136)
     at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:190)
     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.Macro$Context.runMacro(Macro.java:172)
     at freemarker.core.Environment.visit(Environment.java:614)
     at freemarker.core.UnifiedCall.accept(UnifiedCall.java:106)
     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.printFile(FreemarkerTemplate.java:109)
     at com.you.test.freemarker.FreemarkerTest.studentFile(FreemarkerTest.java:281)
     at com.you.test.freemarker.FreemarkerTest.testSelect(FreemarkerTest.java:254)
     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

期望的是集合或序列,但是给的是HashMap

3、解决办法

 <#macro select id datas value="" key="" text="" headKey="" headValue="">
      <select id="${id}" name="${id}">
           <option>---请选择---</option>
           <#if headKey!="">
                <option value="${headKey}">${headValue}</option>
           </#if>
           <#if datas?is_hash_ex>
              <#local keys=datas?keys/>
              <#list keys as key>
                   <#if key==value>
                       <option value="${key}" selected>${datas[key]}</option>
                   <#else>
                       <option value="${key}">${datas[key]}</option>
                   </#if>
              </#list>
           <#else>
              <#list datas as data>
               <#if key!="">
                   <#if value == data[key]?string>
                      <option value="${data[key]}" selected>${data[text]}</option>
                   <#else>
                    <option value="${data[key]}">${data[text]}</option>
                  </#if>
               <#else>
                   <#if value == data>
                      <option value="${data}" selected>${data}</option>
                  <#else>
                  <option value="${data}">${data}</option>
               </#if>
              </#if>
           </#list>
         </#if>

      </select>
 </#macro>

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