freemaker代码：
<#list devicesList as device>
${device.ipAddress}
${device.hardwareVendor}
<#list device.ipAddress as pojo2>
${pojo2.policyTag}
${pojo2.policyName}
</#list>
</#list>
把device.ipAddress 改成固定的字符串以后不再报错，但在网上看到别人也是这样写的就没事，而且将 <#list device.ipAddress as pojo2>改为<#assign policys = device.ipAddress><#list policys as pojo2>一样报错！
java 代码：
List<NDeviceLite> deviceLites = new ArrayList<NDeviceLite>();
for (int j = 0; j < 2; j++)
{
NDeviceLite device = new NDeviceLite();
device.setIpAddress("10.1.9.1" + j);
device.setHardwareVendor("cisco");
deviceLites.add(device);
List<ComplianceStatisticsPojo> _pojos = new ArrayList<ComplianceStatisticsPojo>();
for (int i = 1; i < 5; i++)
{
ComplianceStatisticsPojo _pojo = new ComplianceStatisticsPojo();
_pojo.setPolicyName("7.1.2.02.b(Cisco_G)");
_pojo.setPolicyTag("网络访问控制");
_pojos.add(_pojo);
}
dataMap.put("poj", _pojos);
}
dataMap.put("devicesList", deviceLites);
报错信息：
Expected collection or sequence. device.ipAddress evaluated instead to freemarker.template.SimpleScalar on line 1170, column 8 in GradeProtection.ftl.
The problematic instruction:
———-
==> list device.ipAddress as pojo2 [on line 1170, column 1 in GradeProtection.ftl]
———-
Java backtrace for programmers:
———-
freemarker.template.TemplateException: Expected collection or sequence. device.ipAddress evaluated instead to freemarker.template.SimpleScalar on line 1170, column 8 in GradeProtection.ftl.
at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:135)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:190)
at freemarker.core.Environment.visit(Environment.java:415)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
at freemarker.core.Environment.visit(Environment.java:208)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:208)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179)
at freemarker.core.Environment.visit(Environment.java:415)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
at freemarker.core.Environment.visit(Environment.java:208)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:208)
at freemarker.core.Environment.process(Environment.java:188)
at freemarker.template.Template.process(Template.java:237)
at org.netcengfig.compliance.DocumentHandler.createDoc(DocumentHandler.java:61)
at org.netcengfig.compliance.Main.main(Main.java:10)
<#if (device.ipAddress)?exists>
<#list device.ipAddress as pojo2>
${pojo2.policyTag}
${pojo2.policyName}
</#list>
</#if>
加了if以后还是报一样的错，是不是在给freemaker传参时要设置什么？
以下是在java中调用freemaker的代码：
// 要填入模本的数据文件
Map<String, Object> dataMap = new HashMap<String, Object>();
getData(dataMap);
// 设置模本装置方法和路径,FreeMarker支持多种模板装载方法。可以重servlet，classpath，数据库装载，
// 这里我们的模板是放在com.havenliu.document.template包下面
configuration.setClassForTemplateLoading(this.getClass(),
"/com/havenliu/document/template");
Template t = null;
try
{
t = configuration.getTemplate("GradeProtection.ftl");
} catch (IOException e)
{
e.printStackTrace();
}
// 输出文档路径及名称
File outFile = new File("D:/temp/outFile.doc");
Writer out = null;
try
{
out = new BufferedWriter(new OutputStreamWriter(
new FileOutputStream(outFile)));
} catch (FileNotFoundException e1)
{
e1.printStackTrace();
}
try
{
t.process(dataMap, out);
} catch (TemplateException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
在NDeviceLite 里加一个属性
private List<ComplianceStatisticsPojo> pojos;
获取时这样写：
<#list device.pojos as pojo2>
因为在<#list devicesList as device>这循环里写<#list device.ipAddress as pojo2>是指获取device这个对象中的ipAddress属性的值并遍历，而不是获取map中以device.ipAddress作为key的那个list对象，如果要遍历map中的那个以device.ipAddress作为key的list需要在<#list devicesList as device></#list>以外写list遍历，但这样不是我想要的结果所以在NDeviceLite 加了list属性实现双层遍历！
