Spring MVC整合FreeMarker Spring MVC整合FreeMarker的示例
zsq_fengchen 人气:0什么是Freemarker?
FreeMarker是一个用Java语言编写的模板引擎，它基于模板来生成文本输出。FreeMarker与Web容器无关，即在Web运行时，它并不知道Servlet或HTTP。它不仅可以用作表现层的实现技术，而且还可以用于生成XML，JSP或Java 等。
目前企业中:主要用Freemarker做静态页面或是页面展示
一.工程结构
二.web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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">
<display-name>SpringMVC</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springMVC-servlet.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
三.springMVC-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
">
<!-- 自动扫描包 -->
<context:component-scan base-package="com.bijian.study.controller"></context:component-scan>
<!-- 默认注解映射支持 -->
<mvc:annotation-driven></mvc:annotation-driven>
<!--JSP视图解析器-->
<bean id="viewResolverJsp" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
<property name="viewClass" value="org.springframework.web.servlet.view.InternalResourceView"/>
<property name="order" value="1"/>
</bean>
<!-- 配置freeMarker视图解析器 -->
<bean id="viewResolverFtl" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.freemarker.FreeMarkerView"/>
<property name="contentType" value="text/html; charset=UTF-8"/>
<property name="exposeRequestAttributes" value="true" />
<property name="exposeSessionAttributes" value="true" />
<property name="exposeSpringMacroHelpers" value="true" />
<property name="cache" value="true" />
<property name="suffix" value=".ftl" />
<property name="order" value="0"/>
</bean>
<!-- 配置freeMarker的模板路径 -->
<bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
<property name="templateLoaderPath" value="/WEB-INF/ftl/"/>
<property name="freemarkerVariables">
<map>
<entry key="xml_escape" value-ref="fmXmlEscape" />
</map>
</property>
<property name="defaultEncoding" value="UTF-8"/>
<property name="freemarkerSettings">
<props>
<prop key="template_update_delay">3600</prop>
<prop key="locale">zh_CN</prop>
<prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>
<prop key="date_format">yyyy-MM-dd</prop>
<prop key="number_format">#.##</prop>
</props>
</property>
</bean>
<bean id="fmXmlEscape" class="freemarker.template.utility.XmlEscape"/>
</beans>
在JSP和Freemarker的配置项中都有一个order property，上面例子是把freemarker的order设置为0，jsp为1，意思是找view时，先找ftl文件，再找jsp文件做为视图。这样Freemarker视图解析器就能与JSP视图解析器并存。
四.FreeMarkerController.java
package com.bijian.study.controller;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
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.alibaba.fastjson.JSON;
import com.bijian.study.utils.JsonUtil;
import com.bijian.study.vo.User;
@Controller
public class FreeMarkerController {
@RequestMapping("/get/usersInfo")
public ModelAndView Add(HttpServletRequest request, HttpServletResponse response) {
User user = new User();
user.setUsername("zhangsan");
user.setPassword("1234");
User user2 = new User();
user2.setUsername("lisi");
user2.setPassword("123");
List<User> users = new ArrayList<User>();
users.add(user);
users.add(user2);
return new ModelAndView("usersInfo", "users", users);
}
@RequestMapping("/get/allUsers")
public ModelAndView test(HttpServletRequest request, HttpServletResponse response) {
List<User> users = new ArrayList<User>();
User u1 = new User();
u1.setUsername("王五");
u1.setPassword("123");
users.add(u1);
User u2 = new User();
u2.setUsername("张三");
u2.setPassword("2345");
users.add(u2);
User u3 = new User();
u3.setPassword("fgh");
u3.setUsername("李四");
users.add(u3);
Map<String, Object> rootMap = new HashMap<String, Object>();
rootMap.put("userList", users);
Map<String, String> product = new HashMap<String, String>();
rootMap.put("lastProduct", product);
product.put("url", "http://www.baidu.com");
product.put("name", "green hose");
String result = JSON.toJSONString(rootMap);
Map<String, Object> resultMap = new HashMap<String, Object>();
resultMap = JsonUtil.getMapFromJson(result);
return new ModelAndView("allUsers", "resultMap", resultMap);
}
}
五.JsonUtil.java
package com.bijian.study.utils;
import java.util.Map;
import com.alibaba.fastjson.JSON;
public class JsonUtil {
public static Map<String, Object> getMapFromJson(String jsonString) {
if (checkStringIsEmpty(jsonString)) {
return null;
}
return JSON.parseObject(jsonString);
}
/**
* 检查字符串是否为空
* @param str
* @return
*/
private static boolean checkStringIsEmpty(String str) {
if (str == null || str.trim().equals("") || str.equalsIgnoreCase("null")) {
return true;
}
return false;
}
}
六.User.java
ackage com.bijian.study.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;
}
}
七.usersInfo.ftl
<!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>usersInfo</title>
</head>
<body>
<#list users as user>
<div>
username : ${user.username},
password : ${user.password}
</div>
</#list>
</body>
</html>
八.allUsers.ftl
<html>
<head>
<title>allUsers</title>
</head>
<body>
<#list resultMap.userList as user>
Welcome ${user.username}! id:${user.password}<br/>
</#list>
<p>Our latest product:
<a href="${resultMap.lastProduct.url}" rel="external nofollow" >${resultMap.lastProduct.name} </a>!
</body>
</html>
九.运行效果
再输入http://localhost:8088/SpringMVC/greeting?name=zhangshan，JSP视图解析器运行依然正常。
至此,就结束完成整合了!
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