freemarker实现通用分页，首页静态化，通用select，通用文章显示

freemarker工具类：

package org.konghao.freemarker;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;

public class FreemarkerUtil {
	//getTemplate("01.ftl")
	public Template getTemplate(String name) {
		try {
			//通过Freemaker的Configuration读取相应的ftl
			Configuration cfg = new Configuration();
			//设定去哪里读取相应的ftl模板文件
			cfg.setClassForTemplateLoading(this.getClass(),"/ftl");
			//在模板文件目录中找到名称为name的文件
			Template temp = cfg.getTemplate(name);
			return temp;
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public void print(String name,Map<String,Object> root) {
		try {
			//通过Template可以将模板文件输出到相应的流
			Template temp = this.getTemplate(name);
			temp.process(root, new PrintWriter(System.out));
		} catch (TemplateException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public void fprint(String name,Map<String,Object> root,String outFile) {
		FileWriter out = null;
		try {
			//通过一个文件输出流，就可以写到相应的文件中
			out = new FileWriter(new File("D:\\webservice\\ftl\\"+outFile));
			Template temp = this.getTemplate(name);
			temp.process(root, out);
		} catch (IOException e) {
			e.printStackTrace();
		} catch (TemplateException e) {
			e.printStackTrace();
		} finally {
			try {
				if(out!=null) out.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	
}

freemarker测试类：

package org.konghao.freemarker.test;

import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.junit.Before;
import org.junit.Test;
import org.konghao.freemarker.FreemarkerUtil;
import org.konghao.freemarker.model.Article;
import org.konghao.freemarker.model.Channel;
import org.konghao.freemarker.model.Student;
import org.konghao.freemarker.model.User;

public class TestFreemarker {
	FreemarkerUtil fu;
	Map<String,Object> root = null;
	
	@Before
	public void setUp() {
		fu = new FreemarkerUtil();
		root = new HashMap<String,Object>();
	}
	
	@Test
	public void test01() {
		//1、创建数据模型
		Map<String,Object> root = new HashMap<String,Object>();
		//2、为数据模型添加值
		root.put("username", "张三");
		//3、将数据模型和模板组合的数据输出到控制台
		fu.print("01.ftl", root);
		fu.fprint("02.ftl", root, "01.html");
	}
	
	@Test
	public void test02() {
		//freemarker还可以输出相应的对象
		root.put("user", new User(1,"李四",16));
		sprint("03.ftl");
		fprint("03.ftl","03.html");
	}
	
	@Test
	public void test04() {
		List<User> users = Arrays.asList(new User(1,"张三",22),new User(2,"李四",33));
		root.put("users",users);
		sprint("04.ftl");
		fprint("04.ftl","04.html");
	}
	
	@Test
	public void test05() {
		root.put("username", "管理员");
		List<User> users = Arrays.asList(new User(1,"张三",22),new User(2,"李四",33));
		root.put("users",users);
		sprint("05.ftl");
		fprint("05.ftl","05.html");
	}
	
	@Test
	public void test06() {
		
		//此时user对象并没有group的值，这时如果在页面显示group直接报错
		//freemarker不会处理空值
		root.put("user",new User(1,"地点",22));
		sprint("06.ftl");
	}
	
	@Test
	public void test07() {
		root.put("now",new Date());
		root.put("username", "李四");
		sprint("07.ftl");
		fprint("07.ftl", "07.html");
	}
	
	@Test
	public void test08() {
		sprint("08.ftl");
	}
	
	@Test
	public void test09() {
		sprint("09.ftl");
	}
	
	@Test
	public void test10() {
		root.put("username","张三");
		sprint("10.ftl");
	}
	
	@Test
	public void test11() {
		sprint("11.ftl");
	}
	
	@Test
	public void test12() {
		List<User> users = Arrays.asList(new User(1,"张三",22),
						new User(2,"李四",33),
						new User(3,"王五",44));
		root.put("users",users);
		List<Student> stus = Arrays.asList(new Student("123123", "地点"),new Student("11111","方法"));
		root.put("stus", stus);
		sprint("12.ftl");
		fprint("12.ftl","12.html");
	}
	
	@Test
	public void test13() {
		sprint("13.ftl");
		fprint("13.ftl","13.html");
	}
	
	@Test
	public void test14() {
		Map<String,List<Article>> arts = new HashMap<String,List<Article>>();
		List<Article> a1 = Arrays.asList(new Article("说给焦点方法各家阿斯顿发贺卡就是地方贺卡设计", new Channel(1, "多对多")),
						new Article("看似简单干净啊", new Channel(1, "多对多")),
						new Article("阿斯达卡说得好斯蒂芬斯蒂芬", new Channel(1, "多对多")),
						new Article("阿阿斯顿撒上所说的话", new Channel(1, "多对多")),
						new Article("是地方贺卡设计", new Channel(1, "多对多")),
						new Article("斯诺克打击***建设的", new Channel(1, "多对多")));
		arts.put("1", a1);
		
		List<Article> a2 = Arrays.asList(new Article("你说的就是公司根据阿卡什打电话", new Channel(1, "多对多")),
				new Article("个撒旦发撒旦发的时候", new Channel(1, "多对多")),
				new Article("个很好的方法斯蒂芬斯蒂芬个", new Channel(1, "多对多")),
				new Article("阿撒旦发撒旦发上所说的话", new Channel(1, "多对多")),
				new Article("是地方贺卡设计阿斯达卡的方法撒旦发撒旦发", new Channel(1, "多对多")),
				new Article("阿斯顿发撒旦发撒旦发撒旦和斯诺克打击***建设的", new Channel(1, "多对多")));
		arts.put("2", a2);
		root.put("arts",arts);
		sprint("14.ftl");
		fprint("14.ftl","14.html");
	}
	
	private void sprint(String name) {
		fu.print(name, root);
	}
	private void fprint(String name,String filename) {
		fu.fprint(name, root, filename);
	}
}

ftl文件：

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#macro showArt cid titleNum>
	<#nested>
	<#local articles=arts[cid]/>
	<#list articles as art>
		<li><span><a href="">
		<#if (art.title?length>titleNum)>
			${art.title[0..titleNum]}...
		<#else>
			${art.title}
		</#if>
		</span></a>
		</li>
	</#list>
</#macro>

<@showArt cid="1" titleNum=7>
	<h1>水水水水水水</h1>
</@showArt>


<@showArt cid="2" titleNum=10>
	<h1>活活后发货后会</h1>
</@showArt>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#import "/inc/pager.ftl" as my/>
<@my.pager url="#" totalPage=150 curPage=14 class="pagers" showPageNum=20/>

</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#import "/inc/select.ftl" as my/>
<@my.select id="address" datas=["北京","天津","上海"]/>
<@my.select id="sex" datas=["选择性别","男","女"] value="男"/>
<@my.select id="username" datas=users key="id" text="name" 
		headkey="-1" headtext="请选择用户"/>

<@my.select id="stu" datas=stus key="no" text="name" 
		headkey="-1" headtext="请选择学生"/>

<@my.select id="sex" datas={"0":"男","1":"女"} value="1"/>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#--
	使用incldue可能会出现覆盖的问题，可以使用import来完成导入，并且加入名称空间
	<#include "/inc/inc1.ftl"/>
	<#include "/inc/inc2.ftl"/>
-->
<#import "/inc/inc2.ftl" as inc2/>
<#import "/inc/inc1.ftl" as inc1/>
	${inc2.username}
	${inc1.username}
<#--将一个变量定义到名称空间中-->
<#assign age=12 in inc2/>
${inc2.age}
<#--访问名称空间中的自定义指令-->
<@inc1.test/>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

<#assign username="李四">
<#--此时模板中的变量的名称和模型中的变量名称一致，不是覆盖，而是隐藏-->
${username}
<#--使用.globals可以访问模型中的变量-->
${.globals.username}
<#macro test>
<#--此时当调用该指令之后，会将模板中的变量username覆盖为王五
所以这种方式存在风险，所以一般不使用这种方式在指令中定义变量-->
	<#--<#assign username="王五"/>-->
	<#--使用local可以声明局部变量，所以在marco中非特殊使用局部变量-->
	<#local username="王五"/>
	${username}
</#macro>
<@test/>
${username}
<#list 1..3 as username>
<#--循环中的变量出了循环就消失-->
	${username}
</#list>
${username}
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#--对于hello这个自定义指令而言，hello后的都是参数，有两个参数一个是num一个是ok-->
<#macro hello num ok>
	<#list 1..num as n>
		<h1>Hello${ok}${n}</h1>
	</#list>
</#macro>

<#--<@hello/>会报错，因为hello有两个参数,在定义参数的值的时候参数名不能省略-->
<@hello num=3 ok="World"/>

<#--为repeat的两个参数定义了初始值，此时在调用该指令就可以省略参数，如果省略会使用默认值-->
<#macro repeat num=10 ok="World">
	<#list 1..num as n>
		<h1>Hello${ok}${n}</h1>
	</#list>
</#macro>

<@repeat/>

<#macro test>
	<#--nested会输出指令中的内容-->
	<#nested 12 33/>
	<#nested 11 22/>
	<#nested 22 33/>
</#macro>

<@test;x,y>
	<h1>你好啊--${x}--${y}</h1>
</@test>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#assign nums=[1,3,4,56,33,43]/>
${nums?first}
<#--特别注意，以下定义不使用[12..200]-->
<#assign nums=12..200/><#--定义了一个连续的序列从12到199-->
<#--序列的拆分-->
<#assign nums1=nums[1..10]>
<#list nums1 as num>
${num}
</#list>
${"你好，你来了吗今天看书了吗！"[0..8]}...
<#assign maps={"1":"张三","2":"李四"}>
${maps["1"]}
<#--以下代码可以将map的key转换为相应的序列-->
<#assign keys=maps?keys>
<#list keys as key>
${key}---${maps[key]}

<#assign users={"username":"张三","password":"123"}>
${users.username}---${users["password"]}
</#list>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#--定义变量-->
<#assign username="张三"/>
${username}
<#--定义了一个数字-->
<#assign num=10>
${num+11}
<#assign str="10"/>
${str+11}
<#--值会完成覆盖-->
<#assign str=33/>
${str+11}
<#assign b=true/>
<#--不能直接输出数字或者字符串以外的类型，否则都会报错，需要转换为字符串才能输出
	使用xxx?string可以完成对字符串的转换
-->
<#--${b}-->
${b?string}
${(a.d)???string}
<#--日期也不能直接输出，需要转换为字符串-->
${now?string("yyyy-MM-dd HH:mm:ss")}
<#--${now?string}没有为日期设定格式也会报错-->

<#--以下显示了使用字符链接和插值的方式连接字符串-->
${"hello"+username}

${"hello${username}"}

<#--字符串转换为日期
data用来转换日期，datatime用来转换日期和时间,time用来转换时间
-->
<#assign bir="1979-12-02 12:22:33"?date("yyyy-MM-dd HH:mm:ss")>
<#assign bir="1979-12-02 12:22:33"?datetime("yyyy-MM-dd HH:mm:ss")>
${bir}

${"<br/>"?html}

[${"abcde"?left_pad(10,"--")}]

${1.4?string(0)}
${1.8?int}
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
${user.id}-------${user.name}------${user.group!}
<#--${user.group.name!}--><#-- 按照以上的方式加! freemarker仅仅只会判断group.name是不是空值 -->
${(user.group.name)!"没有任何值存在"}

${(a.b)!"没有a.b元素"}

<#if (a.b)??>
	不为空
<#else>
	为空
</#if>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#include "/inc/top.ftl"/>
<hr/>
<#list users as user>
${user.id}---------${user.name}-------${user.age}<br/>
</#list>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#list users as user>
${user.id}---------${user.name}-------${user.age}<br/>
</#list>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>${user.id}-----${user.name}-----${user.age}</h1>
<#if user.age lt 12>
	${user.name}还是一个小孩
<#elseif user.age lt 18>
	${user.name}快成年
<#else>
	${user.name}已经成年
</#if>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>${username}</h1>
</body>
</html>

你好:${username}

<#assign username="张三">

<#macro test>
	hello world
</#macro>

<#assign username="李四">

<#macro pager url totalPage curPage=1 class="" showPageNum=15>
	<#local halfPage=(showPageNum/2)?int/>
	${halfPage}
	<#if (halfPage>=curPage)>
		<@showPage start=1 end=curPage url=url class=class curPage=curPage/>
		<@showPage start=curPage+1 end=showPageNum curPage=curPage url=url class=class/>
	<#else>
		<@showPage start=curPage-halfPage end=curPage url=url class=class curPage=curPage/>
		<#if (curPage+halfPage>totalPage)>
			<#local endPage=totalPage/>
		<#else>
			<#local endPage=curPage+halfPage/>
		</#if>
		<@showPage start=curPage+1 end=endPage url=url class=class curPage=curPage/>
	</#if>
</#macro>

<#macro showPage start end curPage url class>
	<#list start..end as page>
		<#if curPage==page>
			[${page}]
		<#else>
			<a href="${url}" class="${class}">${page}</a>
		</#if>
	</#list>
</#macro>

<#macro select id datas value="" key="" text="" headkey="" headtext="">
	<select id="${id}" name="${id}">
	<#if headkey!="">
	<option value="${headkey}">${headtext}</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>

<h1>欢迎${username}访问我们的系统</h1>

pom.xml文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.konghao.freemarker</groupId>
  <artifactId>freemarker-hello</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>freemarker-hello</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.7</version>
      <scope>test</scope>
    </dependency>
    <dependency>
	  <groupId>org.freemarker</groupId>
	  <artifactId>freemarker</artifactId>
	  <version>2.3.19</version>
	</dependency>
  </dependencies>
</project>

fre-servlet.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">

	<mvc:annotation-driven />
	<context:component-scan base-package="org.konghao.fre.controller"></context:component-scan>

	<mvc:resources location="/resources/" mapping="/resources/**" />
	
	<bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
 		 <property name="templateLoaderPath" value="/WEB-INF/ftl/"/>
	</bean>
	<bean id="viewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
  		<property name="cache" value="true"/>
 		<property name="prefix" value=""/>
  		<property name="suffix" value=".ftl"/>
  		<property name="contentType" value="text/html; charset=UTF-8"></property>
	</bean>
	
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="viewClass"
			value="org.springframework.web.servlet.view.JstlView" />
		<property name="prefix" value="/WEB-INF/jsp/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
	
	<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
		<property name="mediaTypes">
			<map>
				<entry key="json"  value="application/json" />
				<entry key="xml" value="text/xml" />
				<entry key="htm" value="text/html" />
			</map>
		</property>
		<property name="defaultContentType" value="text/html" />
	</bean>
</beans>

评论

2 楼 Imini123 2015-09-25  

[align=center][color=red][/color]

[/align]

1 楼 Seanman 2015-02-10  

初学freemarker,源码不全，不知道怎么用