SpringMVC（二）

第三章 Rest风格的资源 URL

第一节：Restful风格的资源 URL简介
第二节：SpringMvc对Rest风格的支持
第三节：@PathVariable获取 Url 变量
第四节：SpringMvc对静态资源的处理

图中csdn的地址就是Restful风格的，在web.xml中设置需要拦截所有请求，这样也会把静态资源拦截掉，需要特别处理。

　　<mvc:resources mapping="/resources/**" location="/images/"/> 把图片的路径换成映射路径（css,js等引入文件都需要做处理，特别麻烦）。

原来的路径（会被DispatcherServlet拦截，报找不到映射路径的错误）：<img alt="文章列表" src="${pageContext.request.contextPath}/images/article_list.jpg">

　　映射路径：<img alt="文章列表" src="${pageContext.request.contextPath}/resources/article_list.jpg">

cnblogs的可以说是仿Restful风格的，只要拦截*.html结尾的请求。这个比较好。

=================spring-mvc.xml=====================
<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    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.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 使用注解的包，包括子集 -->
    <context:component-scan base-package="com.java1234"/>
    
    <mvc:annotation-driven/>
    
    <mvc:resources mapping="/resources/**" location="/images/"/>
    
    <mvc:resources mapping="/resources2/**" location="/css/"/>
    
    
    <!-- 视图解析器 -->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp"></property>
    </bean>

</beans>

====================web.xml=====================

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="WebApp_ID" version="2.5">
    <display-name>SpringMvc01</display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>

    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

View Code

@Controller
@RequestMapping("/article")
public class ArticleController {

    @RequestMapping("/list")
    public String list(Model model){
        return "article/list";
    }
    
    @RequestMapping("/details/{id}")
    public ModelAndView details(@PathVariable("id") int id){
        ModelAndView mav=new ModelAndView();
        if(id==1){
            mav.addObject("article", new Article("文章一","文章一的内容"));
        }else if(id==2){
            mav.addObject("article", new Article("文章二","文章二的内容"));
        }
        mav.setViewName("article/details");
        return mav;
    }
}

View Code

<table>
    <tr>
        <th colspan="2">
            <img alt="文章列表" src="${pageContext.request.contextPath}/resources/article_list.jpg">
        </th>
    </tr>
    <tr>
        <td>1</td>
        <td>
            <a href="${pageContext.request.contextPath}/article/details/1" target="_blank">文章一</a>
        </td>
    </tr>
    <tr>
        <td>2</td>
        <td>
            <a href="${pageContext.request.contextPath}/article/details/2" target="_blank">文章二</a>
        </td>
    </tr>
</table>



<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/resources2/css.css"/>
</head>
<body>
<p class="p1">${article.title }</p>
<p>${article.content }</p>
</body>
</html>

View Code

第一节：SpringMvc单文件上传
第二节：SpringMvc多文件上传

增加文件上传的bean : <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

在测试环境中filePath 获取的路径是tomcat或者eclipse插件部署项目的路径（看你server的设置），所以文件上传后，你刷新upload文件夹发现没有文件，但是在正式环境中没问题的。

@Controller
public class FileUploadController {

    @RequestMapping("/upload")
    public String uploadFile(@RequestParam("file1") MultipartFile file1,HttpServletRequest request)throws Exception{
        String filePath=request.getServletContext().getRealPath("/");
        System.out.println(filePath);
        file1.transferTo(new File(filePath+"upload/"+file1.getOriginalFilename()));
        return "redirect:success.html";
    }
    
    @RequestMapping("/upload2")
    public String uploadFiles(@RequestParam("file") MultipartFile[] files,HttpServletRequest request)throws Exception{
        String filePath=request.getServletContext().getRealPath("/");
        System.out.println(filePath);
        for(MultipartFile file:files){
            file.transferTo(new File(filePath+"upload/"+file.getOriginalFilename()));            
        }
        return "redirect:success.html";
    }
}

View Code

<?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:p="http://www.springframework.org/schema/p"
    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/context
        http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 使用注解的包，包括子集 -->
    <context:component-scan base-package="com.java1234"/>

    <!-- 视图解析器 -->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp"></property>
    </bean>
    
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        
        <property name="defaultEncoding" value="UTF-8"/>  
        <property name="maxUploadSize" value="10000000"/>   <!-- 10M大小的文件 -->

    </bean>

</beans>

View Code

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="upload2.do" method="post" enctype="multipart/form-data">
    <table>
        <tr>
            <th colspan="2">上传文件</th>
        </tr>
        <tr>
            <td>文件一</td>
            <td>
                <input type="file" name="file"/>
            </td>
        </tr>
        <tr>
            <td>文件二</td>
            <td>
                <input type="file" name="file"/>
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <input type="submit" value="上传文件"/>
            </td>
        </tr>
    </table>
</form>
</body>
</html>

View Code

posted @ 2017-04-04 12:22 SKYisLimit 阅读(84) 评论(0) 收藏举报

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SpringMVC（二）

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