靜態資源和Spring MVC

Question

我知道有很多關於此問題的詢問的問題，但是我的情況有所不同，根據先前的問題我找不到任何解決方案。 我使用的是Spring MVC，並且一切正常，直到我發現我的瀏覽器未呈現圖像。 然后，我嘗試為瀏覽器提供圖像的完整URL，並返回404。我嘗試使用<mvc:default-servlet-handler/> <mvc:resources mapping="/images/**" location="/images/"/>

這沒有顯示我的圖像，但是也以某種方式弄亂了我的控制器，它沒有處理url映射。 我將向您展示我的大部分代碼。

這是我的web.xml ：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">


<servlet>
    <servlet-name>spring-brains</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
    <multipart-config/>
</servlet> 
<servlet-mapping>
    <servlet-name>spring-brains</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>   
<welcome-file-list>
    <welcome-file>
        index.jsp
    </welcome-file>
</welcome-file-list> 
<filter>
    <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

<filter>
    <filter-name>springSecurityFilterChain</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
    <filter-name>springSecurityFilterChain</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
        /WEB-INF/spring-brains-servlet.xml
    </param-value>
</context-param>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<jsp-config>
    <jsp-property-group>
        <url-pattern>*.jsp</url-pattern>
        <page-encoding>UTF-8</page-encoding>
    </jsp-property-group>
</jsp-config>

這是我的spring-brains-servlet.xml ：

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

<context:component-scan base-package="bobi.spring.spring.brains"/>

<bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
    <property name="prefix" value="/"></property>
    <property name="suffix" value=".jsp"></property>
</bean>

<mvc:default-servlet-handler/>
<mvc:resources mapping="/images/**" location="/images/"/>

<security:debug/>

<security:http pattern="/admin/login.jsp" security="none"/>
<security:http auto-config="true">
    <security:intercept-url pattern="/admin/**" access="ROLE_USER" />
    <security:form-login login-page="/admin/login.jsp" default-target-url="/admin/admin.jsp" always-use-default-target="true"/>             
    <security:logout logout-success-url="/admin" />
</security:http>

<bean class="service.DummyUserService" id="user-service-bobi"/>

<security:authentication-manager>
    <security:authentication-provider user-service-ref="user-service-bobi">
    </security:authentication-provider>
</security:authentication-manager>

這是我的AdminController ：

/*


* To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package bobi.spring.spring.brains;

import domains.User;
import java.io.IOException;
import java.util.HashMap;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import service.Authentication;
import service.ProductManager;
import service.Service;

/**
 *
 * @author BOBBOO
 */
@MultipartConfig
@Controller
@RequestMapping(value = "/admin")
public class AdminController {

protected final Log logger = LogFactory.getLog(getClass());

@RequestMapping(value = "/{adminview}")
public ModelAndView getAdminView(@PathVariable("adminview") String view) {

    switch (view) {
        case "login": {
            return new ModelAndView("admin/login");
        }
        case "admin": {
            return new ModelAndView("admin/admin");
        }
        case "newcategory": {
            return new ModelAndView("admin/newcategory");
        }
        case "newproduct": {
            return new ModelAndView("admin/newproduct", "categories", Service.getCategories());
        }
        case "newuser": {
            return new ModelAndView("admin/newuser");
        }
        case "products": {

            return new ModelAndView("admin/products", "products", Service.getProducts());
        }
        default:
            return new ModelAndView("admin/login");
    }
}

@RequestMapping("/form")
public void formHandler(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException, FileUploadException {

    String formId = request.getParameter("formId");
    request.setCharacterEncoding("UTF-8");
    if (formId != null && formId.equals("newcat")) {

        service.Admin.saveCategory((HashMap) ServletUtils.prepareRequestArguments(request));
        response.sendRedirect("admin/newcategory");
    } else if (formId != null && formId.equals("login")) {
        Authentication auth = new Authentication();
        User user = service.Service.getUser(request.getParameter("username"));

    } else if (formId != null && formId.equals("newuser")) {
        Authentication auth = new Authentication();
        boolean success = auth.CheckUserName(request.getParameter("username"));

        if (success) {
            service.Admin.saveUser((HashMap) ServletUtils.prepareRequestArguments(request));

            response.sendRedirect("admin/newuser");
        } else {
            response.sendRedirect("admin/login");
        }
    } 

}

@RequestMapping(value = "/upload")
public void productAdd(HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException {
    if (ServletFileUpload.isMultipartContent(request)) {

        request.setCharacterEncoding("UTF-8");
        Part part = request.getPart("picture");
        String path = service.Constants.LINUX_ABS_PROJECT_PATH + System.getProperty("file.separator") + "images";
        Service serv = new Service();
        String kategorija = request.getParameter("category");
        System.out.println(kategorija);
        try {
            serv.SaveFile(path, part);
        } catch (Exception e) {
            e.printStackTrace();
        }
        ServletUtils util = new ServletUtils();
        try {
            service.Admin.saveProduct((HashMap) util.prepareRequestMultiPartArguments(request));
        } catch (Exception e) {
            logger.info("Error while saving product @ AdminController, line 92!!");
        }

        response.sendRedirect(request.getContextPath() + "/admin/admin.jsp");

    }
}

@RequestMapping(value="/edit/{object}/{objectId}")
public ModelAndView editTable(@PathVariable("object") String editItemType, 
                               @PathVariable("objectId") String itemId){
switch(editItemType){
    case "product":{
        return new ModelAndView("admin/editproduct", "product", Service.getProduct(Integer.parseInt(itemId)));
    }
    case "category":{
    return new ModelAndView("admin/editcategory", "category", Service.getProduct(Integer.parseInt(itemId)));
    }
    case "user":{
    return new ModelAndView("admin/edituser", "user", Service.getProduct(Integer.parseInt(itemId)));
    }
}
return new ModelAndView("admin/admin");
}

@RequestMapping(value="/formedit")
public void editForm(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException, FileUploadException {

    String formId = request.getParameter("formId");
    request.setCharacterEncoding("UTF-8");
    if (formId != null && formId.equals("newcat")) {

        service.Admin.saveCategory((HashMap) ServletUtils.prepareRequestArguments(request));
        response.sendRedirect("admin/newcategory");
    } else if (formId != null && formId.equals("login")) {
        Authentication auth = new Authentication();
        User user = service.Service.getUser(request.getParameter("username"));

    } else if (formId != null && formId.equals("newuser")) {
        Authentication auth = new Authentication();
        boolean success = auth.CheckUserName(request.getParameter("username"));

        if (success) {
            service.Admin.saveUser((HashMap) ServletUtils.prepareRequestArguments(request));

            response.sendRedirect("admin/newuser");
        } else {
            response.sendRedirect("admin/login");
        }
    } 

}

}

因此，基本上我有兩個問題：1.如何使我的應用顯示靜態圖像內容？ 2.為什么以及如何->

<mvc:default-servlet-handler/>
 <mvc:resources mapping="/images/**" location="/images/"/>

弄亂了我的控制器，或者我說阻止它處理應該處理的映射。

預先謝謝你，我已經為此努力了幾天

Answer 1

您尚未在問題中包含jsp或view。 使用JSTL標記從Web應用程序的根目錄生成絕對路徑：

<img src="<c:url value='/images/yourimage.jpg'/>">