基于Java的Spring框架来操作FreeMarker模板的示例
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2024-03-09 14:58:37
1、通过string来创建模版对象，并执行插值处理
import freemarker.template.template;
impo...
1、通过string来创建模版对象，并执行插值处理
import freemarker.template.template;
import java.io.outputstreamwriter;
import java.io.stringreader;
import java.util.hashmap;
import java.util.map;
/**
* freemarker最简单的例子
*
* @author leizhimin 11-11-17 上午10:32
*/
public class test2 {
public static void main(string[] args) throws exception{
//创建一个模版对象
template t = new template(null, new stringreader("用户名：${user};url： ${url};姓名： ${name}"), null);
//创建插值的map
map map = new hashmap();
map.put("user", "lavasoft");
map.put("url", "http://www.baidu.com/");
map.put("name", "百度");
//执行插值，并输出到指定的输出流中
t.process(map, new outputstreamwriter(system.out));
}
}
执行后，控制台输出结果：
用户名：lavasoft; url： http://www.baidu.com/; 姓名： 百度 process finished with exit code 0
2、通过文件来创建模版对象，并执行插值操作
import freemarker.template.configuration;
import freemarker.template.template;
import java.io.file;
import java.io.outputstreamwriter;
import java.util.hashmap;
import java.util.map;
/**
* freemarker最简单的例子
*
* @author leizhimin 11-11-14 下午2:44
*/
public class test {
private configuration cfg; //模版配置对象
public void init() throws exception {
//初始化freemarker配置
//创建一个configuration实例
cfg = new configuration();
//设置freemarker的模版文件夹位置
cfg.setdirectoryfortemplateloading(new file("g:\\testprojects\\freemarkertest\\src"));
}
public void process() throws exception {
//构造填充数据的map
map map = new hashmap();
map.put("user", "lavasoft");
map.put("url", "http://www.baidu.com/");
map.put("name", "百度");
//创建模版对象
template t = cfg.gettemplate("test.ftl");
//在模版上执行插值操作，并输出到制定的输出流中
t.process(map, new outputstreamwriter(system.out));
}
public static void main(string[] args) throws exception {
test hf = new test();
hf.init();
hf.process();
}
}
创建模版文件test.ftl
<html>
<head>
<title>welcome!</title>
</head>
<body>
<h1>welcome ${user}!</h1>
<p>our latest product:
<a href="${url}">${name}</a>!
</body>
</html>
尊敬的用户你好：
用户名：${user};
url： ${url};
姓名： ${name}
执行后，控制台输出结果如下：
<html> <head> <title>welcome!</title> </head> <body> <h1>welcome lavasoft!</h1> <p>our latest product: <a href="http://www.baidu.com/">百度</a>! </body> </html>
尊敬的用户你好：
用户名：lavasoft; url： http://www.baidu.com/; 姓名： 百度 process finished with exit code 0
3.基于注解的spring+freemarker实例
web项目图
web.xml文件
<?xml version="1.0" encoding="utf-8"?>
<web-app id="webapp_id" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<servlet>
<!-- 配置dispatcherservlet -->
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.dispatcherservlet</servlet-class>
<!-- 指定spring mvc配置文件位置 不指定使用默认情况 -->
<init-param>
<param-name>contextconfiglocation</param-name>
<param-value>/web-inf/springmvc-servlet.xml</param-value>
<!--默认:/web-inf/<servlet-name>-servlet.xml
classpath方式:<param-value>classpath:/spring-xml/*.xml</param-value>
-->
</init-param>
<!-- 设置启动顺序 -->
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 配置映射 servlet-name和dispatcherservlet的servlet一致 -->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern><!-- 拦截以/所有请求 -->
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
springmvc-servlet.xml文件
<?xml version="1.0" encoding="utf-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemalocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 默认注解映射支持 -->
<mvc:annotation-driven/>
<!-- 自动扫描包 -->
<context:component-scan base-package="com.spring.freemarker" />
<!--<context:annotation-config /> 配置自动扫描包配置此配置可省略-->
<!--<bean class="org.springframework.web.servlet.mvc.annotation.defaultannotationhandlermapping" 配置自动扫描包配置此配置可省略/>-->
<!-- 配置freemarker的模板路径 -->
<bean class="org.springframework.web.servlet.view.freemarker.freemarkerconfigurer">
<property name="templateloaderpath" value="web-inf/ftl/" />
<property name="defaultencoding" value="utf-8" />
</bean>
<!-- freemarker视图解析器 -->
<bean class="org.springframework.web.servlet.view.freemarker.freemarkerviewresolver">
<property name="suffix" value=".ftl" />
<property name="contenttype" value="text/html;charset=utf-8" />
<!-- 此变量值为pagecontext.request, 页面使用方法：rc.contextpath -->
<property name="requestcontextattribute" value="rc" />
</bean>
</beans>
freemarkercontroller类
package com.spring.freemarker;
import java.util.arraylist;
import java.util.list;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.servlet.modelandview;
import com.spring.vo.user;
@controller
@requestmapping("/home")
public class freemarkercontroller {
@requestmapping("/index")
public modelandview add(httpservletrequest request, httpservletresponse response) {
user user = new user();
user.setusername("zhangsan");
user.setpassword("1234");
list<user> users = new arraylist<user>();
users.add(user);
return new modelandview("index", "users", users);
}
}
user类
package com.spring.vo;
public class user {
private string username;
private string password;
public string getusername() {
return username;
}
public void setusername(string username) {
this.username = username;
}
public string getpassword() {
return password;
}
public void setpassword(string password) {
this.password = password;
}
}
index.ftl文件
<!doctype html public "-//w3c//dtd html 4.01 transitional//en" "http://www.w3.org/tr/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>insert title here</title>
</head>
<body>
<#list users as user>
username : ${user.username}<br/>
password : ${user.password}
</#list>
</body>
</html>
部署到tomcat，运行：http://localhost:8080/springmvc/home/index
显示结果：
username : zhangsan password : 1234