springboot 干掉 web.xml

原始的web.xml里有4个配置，上篇文章已经把springmvc的解决了

1. spring redis session的filter

2. shiro的filter

3. 编码字符集filter       

4. 和一个监听器

代码如下，其中第1，3，4个默认已经集成，不需要再配置，

<?xml version="1.0" encoding="UTF-8"?>  
 <web-app 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_2_5.xsd"  
 version="2.5">  
<!-- needed for ContextLoaderListener -->
    
<filter>
    <filter-name>springSessionRepositoryFilter</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>springSessionRepositoryFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  
    <!-- <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param> -->

    <!-- Bootstraps the root web application context before servlet initialization -->
     <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- The front controller of this Spring Web application, responsible for handling all application requests -->
    <servlet>
        <servlet-name>springDispatcherServlet</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>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- Map all requests to the DispatcherServlet for handling -->
     <servlet-mapping>
        <servlet-name>springDispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping> 
    

    <!-- 权限管理 shiro -->
 <filter>
        <filter-name>shiroFilter</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
        <init-param>
            <param-name>targetFilterLifecycle</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>shiroFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    字符集转码
    <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>
   
 
 
 </web-app>

需要配置的是 shiro的过滤器

@Bean
    public FilterRegistrationBean<DelegatingFilterProxy> filterRegistrationBean(){
        FilterRegistrationBean<DelegatingFilterProxy> filterRegistrationBean = new FilterRegistrationBean<>();
        // 新建一个代理对象

        DelegatingFilterProxy proxy = new DelegatingFilterProxy();
        proxy.setTargetBeanName("shiroFilter");
        proxy.setTargetFilterLifecycle(true);
        
        //注册，
    
        filterRegistrationBean.setFilter(proxy);
        
        // //只要经过前端过滤器的，也都经过这个过滤器 "dispatcherServlet”
        Collection<String> servletNames = new ArrayList<String>();
        servletNames.add(DispatcherServletAutoConfiguration.DEFAULT_DISPATCHER_SERVLET_BEAN_NAME);    //默认是"dispatcherServlet"
        filterRegistrationBean.setServletNames(servletNames);
　　　　//上面这段，测试时不加也可以，直接返回也能得到filter
        return filterRegistrationBean;
    }

另外如果发现mybatis出现 查询结果toomany的异常，检测数据库的结果是否是唯一，比如我添加了两条重复的作者和yaoid的解释，就报这个错误。