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package com.autumn.servlet;import javax.servlet.ServletConfig;import javax.servlet.ServletException;/** * Created by Administrator on 2018/6/6. */public class Dispatcher extends org.springframework.web.servlet.DispatcherServlet {    private static final long serialVersionUID = -7677752525845571027L;    @Override    public void init(ServletConfig config) throws ServletException {        super.init(config);        String appName = config.getInitParameter("appName").trim();     //web.xml中初始化參數(shù)        config.getServletContext().setAttribute("appName", appName);   //將這個appName放入servletContext中    }}

    <!-- springmvc的前端控制器 -->    <servlet>        <servlet-name>bookkeep-web</servlet-name>        <servlet-class>com.autumn.servlet.Dispatcher</servlet-class>   <!--原來為org.springframework.web.servlet.DispatcherServlet-->        <!-- contextConfigLocation不是必須的， 如果不配置contextConfigLocation， springmvc的配置文件默認在：WEB-INF/servlet的name+"-servlet.xml" -->        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:spring/Springmvc.xml</param-value>        </init-param>        <init-param>            <param-name>appName</param-name>            <param-value>Bookkeeping</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>bookkeep-web</servlet-name>        <!-- 攔截所有請求jsp除外 -->        <url-pattern>/</url-pattern>    </servlet-mapping>

<?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-4.2.xsd        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd">    <!-- 掃描controller驅(qū)動 -->    <context:component-scan base-package="com.autumn.controller" />    <!-- 注解驅(qū)動 -->    <mvc:annotation-driven />    <!--controller返回的視圖解析器,例如返回login，實際解析為http://ip:port/projectName/WEB-INF/jsp/login.jsp-->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix" value="/WEB-INF/jsp/" />        <property name="suffix" value=".jsp" />    </bean></beans>

@Controller@RequestMapping("/loginController")public class LoginController {    @Autowired    public LoginService loginService;    @RequestMapping("/login/{id}")    @ResponseBody   //將返回的對象解析成json字符串    public Account login(@PathVariable String id){        Account account = loginService.login(id);        return account;   //返回json字符串    }    @RequestMapping("/loginpage/{id}")    public String loginpage(@PathVariable String id){        Account account = loginService.login(id);        if (account==null) {            return "login";   //返回springmvc中配置的/WEB-INF/jsp/login.jsp        }else {            return "index";    //返回springmvc中配置的/WEB-INF/jsp/index.jsp        }    }}

<%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>

<base href="<%=basePath%>">