Freemarker运用macro传递对象，及使用类的静态方法
两种方法：
方法一使用文件：
User 类
Fun类
Test类
test.ftl
方法二使用文件：
User 类
Fun类
Test2类
test2.ftl
方法一：
Test类
public class Test {
public static void main(String[] args) {
Configuration config=new Configuration ();
try {
//获取模板D:/test/test.ftl
config.setDirectoryForTemplateLoading (new File ("D:\\test"));
config.setObjectWrapper (new DefaultObjectWrapper ());
Template template=config.getTemplate ("test.ftl","gb18030");
// 将User和Fun的实例放入root
Map root=new HashMap ();
Fun fun=new Fun ();
User user=new User ();
user.setAge (54);
user.setName ("jane");
root.put ("fun", fun);
root.put ("u", user);
//输出路径
File file=new File ("D:\\test\\test3.html");
if (!file.exists ()) {
System.out.println ("file not exist");
file.createNewFile ();
}
Writer out=new BufferedWriter (new FileWriter (file));
template.process (root, out);
out.flush ();
} catch (Exception e) {
e.printStackTrace ();
}
}
}
User类
public class User {
private String name;
private int age;
public String getName () {
return name;
}
public void setName (String name) {
this.name = name;
}
public int getAge () {
return age;
}
public void setAge (int age) {
this.age = age;
}
}
Fun类
public class Fun {
private String name;
public static void print(String str) {
System.out.println ("Let's say:" + str);
}
public static User printUser (User user)
{
return user;
}
public static void printUserAge (User user)
{
System.err.println (user.getName () + “is” +user.getAge () +" years old");
}
}
test.ftl模板
<#macro html fun u>
<#nested/>
</#macro>
<@html fun=fun u=u>
${u.name}
<#--使用静态方法，参数为String类型-->
${fun.print ("hey")}
<#--使用静态方法,参数为Object类型,带返回值-->
<#assign x=fun.printUser (u)>
${x.name}
<#--使用静态方法,参数为Object类型-->
${fun.printUserAge (u)}
</@html>
方法二：
Test2类
public class Test 2{
public static void main(String[] args) {
Configuration config=new Configuration ();
try {
//获取模板D:/test/test.ftl
config.setDirectoryForTemplateLoading (new File ("D:\\test"));
config.setObjectWrapper (new DefaultObjectWrapper
Template template=config.getTemplate ("test2.ftl","gb18030");
Map root=new HashMap ();
//方法一1:use ${fun.print("sss") } in ftl file
BeansWrapper wrapper = BeansWrapper.getDefaultInstance ();
TemplateHashModel staticModels = wrapper.getStaticModels ();
TemplateHashModel funStatics = (TemplateHashModel) staticModels.get ("cn.app.test2.Fun");
root.put ("fun", funStatics);
//方法二 2: ${statics ["cn.test2.Fun"].print ("sss")}
root.put ("statics", BeansWrapper.getDefaultInstance ().getStaticModels ());
//输出路径
File file=new File ("D:\\test\\test3.html");
if (!file.exists ()) {
System.out.println ("file not exist");
file.createNewFile ();
}
Writer out=new BufferedWriter (new FileWriter (file));
template.process (root, out);
out.flush ();
} catch (Exception e) {
e.printStackTrace ();
}
}
}
test2.ftl模板
${fun.print("print directly！") }
${statics["cn.app.test2.Fun"].print("user statics！") }