freemarker模板语言
定义变量
<#assign text=”hello, ${name}”
分支选择
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<#if (age>40)>
older...
<#elseif (age>18)>
younger..
<#else>
smaller...
</#if>
算术,逻辑运算
同JAVA一样
从文件创建实例
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String ftlPath = FreemarkerEngine.class.getResource("/ftl").getPath();
Configuration configuration = new Configuration();
configuration.setTagSyntax(Configuration.ANGLE_BRACKET_TAG_SYNTAX);
configuration.setDirectoryForTemplateLoading(new File(ftlPath));
Template template = configuration.getTemplate("hello.ftl");
Map<String, Object> datas = new HashMap<String, Object>();
datas.put("name", "cm");
datas.put("age", 19);
Writer out = new OutputStreamWriter(System.out);
template.process(datas, out);
out.flush();
从string创建实例
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Configuration configuration = new Configuration();
configuration.setTagSyntax(Configuration.SQUARE_BRACKET_TAG_SYNTAX);
configuration.setSharedVariable("cp", "mz");
String content = "name:${name}\r\nage:${age}\r\n==>${cp}, ${caller(\"cm\", name, age)}";
Template template = new Template("first", content, configuration);
Map<String, Object> datas = new HashMap<String, Object>();
datas.put("name", "cm");
datas.put("age", 18);
Writer out = new OutputStreamWriter(System.out);
template.process(datas, out);
out.flush();
自定义方法
先实现方法
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public class FreemarkerCaller implements TemplateMethodModelEx {
@Override
public Object exec(List arguments) throws TemplateModelException {
System.out.println("==>开始执行自定义方法");
for(Object value : arguments) {
System.out.println("-->" + value);
}
return "succ";
}
}
然后通过参数对象传递到模板中
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datas.put("caller", new FreemarkerCaller());
在模板中使用
${caller("cm", name, age)} // 如果调用其它变量, 直接写变量名即可, 比如此处的name, age都是变量
