Spring MVC集成Struts Tiles使用方法

最新推荐文章于 2021-03-05 04:00:45 发布

daryl715

最新推荐文章于 2021-03-05 04:00:45 发布

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分类专栏：经验技巧之Spring 文章标签： spring mvc struts import header html

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本文介绍了如何在Spring MVC中集成Struts Tiles，通过定义一个总的tiles视图，如/mainTemplate.jsp，并利用tiles标签加载header、content和footer页面。内容中详细展示了配置过程，包括控制器、Spring配置文件和tiles定义。通过ComponentControllerSupport减少冗余代码，实现header部分的动态展示，例如从数据库获取数据。示例运行结果证明了这种方式的有效性。

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首先，我们定义一个总体的tiles视图 /tiles/mainTemplate.jsp

首先使用:<tiles:getAsString name="title"/>打印tiles配置文件中定义的字符串属性title
然后是分别加载header,content,footer三个jsp页面，共同组成mainTemplate.jsp

<%@ taglib uri="http://jakarta.apache.org/struts/tags-tiles" prefix="tiles" %>

<html>

<head>

</head>

<body>

the title is:<tiles:getAsString name="title"/>

<tiles:insert name="header"/>

<tiles:insert name="content"/>

<tiles:insert name="footer"/>

</body>

</html>

header.content.footer页面如下：

<html>

<head>

</head>

<body>

this is from header

</body>

</html>

<html>

<head>

</head>

<body>

this is from content

</body>

</html>

<html>

<head>

</head>

<body>

this is from footer</body>

</html>

Spring MVC 控制类：

package Action;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import model.Student;

import org.springframework.validation.BindException;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.AbstractCommandController;

public class TilesHomeController extends AbstractCommandController {

protected ModelAndView handle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, BindException arg3) throws Exception {

return null;

}

protected ModelAndView handleRequestInternal(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {

return new ModelAndView("courseDetail","","");

}

当我们运行上面这个控制器时候，系统会自动去寻找courseDetail.jsp这个文件，但我们还没有定义这个文件，所以，我们要这样写tiles-def.xml

<!DOCTYPE tiles-definitions PUBLIC

"-//Apache Software Foundation//DTD Tiles Configuration//EN"

"http://jakarta.apache.org/struts/dtds/tiles-config_1_1.dtd">

<tiles-definitions>

</definition>

<!---以courseDetail命名的配置，覆盖了模板中的title和content对应的页面->

</definition>

</tiles-definitions>

/title/courseContent.jsp

<%@ taglib uri="http://jakarta.apache.org/struts/tags-tiles" prefix="tiles" %>

<html>

<head>

</head>

<body>

this is courseContent

</body>

</html>

spring配置文件：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" >

<beans>

<props>

<prop key="/tiles.mvc">TilesController</prop>

</props>

</property>

</bean>

</bean>

<value>org.springframework.web.servlet.view.tiles.TilesView</value>

</property>

</bean>

<list>

<value>/WEB-INF/train-def.xml</value>

</list>

</property>

</bean>

</beans>

运行/title.mvc （mvc是我自定义的扩展名）我们可以看到如下结果：

courseDetail title
this is from header
this is courseDetail
this is from footer

如果我们需要在每一个页面的header部分显示一些我们从数据库里读取的数值，我们可以在不同的控制器中加入访问数据库的代码，但这样显得很啰唆，因为header部门在每个页面都是公用的，也就是说不同的页面只有content部分不同，这样，我们就会有很多冗余代码，未解决这个问题，我们可以使用spring为我们提供的ComponentControllerSupport

package Action;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import model.Student;

import org.apache.struts.tiles.ComponentContext;

import org.springframework.web.servlet.view.tiles.ComponentControllerSupport;

public class HeaderTilesController extends ComponentControllerSupport {

protected void doPerform(ComponentContext context, HttpServletRequest request,

HttpServletResponse response) throws Exception {

Student stu=new Student();

stu.setName("gaoxiang");

stu.setSex("male");

//tiles context中存放简单数据

context.putAttribute("name", stu.getName());

context.putAttribute("sex", stu.getSex());

//tiles context中存放对象

context.putAttribute("student", stu);

//request中存放数据

request.setAttribute("requestname", stu.getName()+"-request");

request.setAttribute("requestsex", stu.getSex()+"-request");

}

改写train-def.xml

<!DOCTYPE tiles-definitions PUBLIC

"-//Apache Software Foundation//DTD Tiles Configuration//EN"

"http://jakarta.apache.org/struts/dtds/tiles-config_1_1.dtd">

<tiles-definitions>

</definition>

</definition>

</definition>

</tiles-definitions>

改header.jsp

<%@ taglib uri="http://jakarta.apache.org/struts/tags-tiles" prefix="tiles" %>

<%@page import="model.Student" %>

<html>

<head>

</head>

<body>

<tiles:importAttribute name="student" />

<tiles:useAttribute id="student" name="student" scope="request"/>

this is header class from TileContext:${requestScope.student.name }+${requestScope.student.sex }

this is header date from TileContext: <tiles:getAsString name="name"/>+<tiles:getAsString name="sex"/>

this is header date from request:${requestname }+${requestsex }

</body>

</html>

运行结果：

the title is:courseDetail title

this is header class from TileContext:gaoxiang+male

this is header date from TileContext: gaoxiang+male

this is header date from request:gaoxiang-request+male-request

this is courseContent
this is footer

附：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">

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>/WEB-INF/train-servlet.xml</param-value>

</context-param>

<servlet-name>train</servlet-name>