利用springMvc+jdbc进行登录，中文乱码

在web.xml文件中

<?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_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>Spring_mvc02</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
 
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
   
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring-jdbc.xml</param-value>
  </context-param>
 
 

《org.springframework.web.filter.CharacterEncodingFilter 为CharacterEncodingFilter包》
  <!-- 编码处理 -->
   <filter>
      <filter-name>encoding</filter-name>
      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
      <!-- 设置编码格式 -->
      <init-param>
          <param-name>encoding</param-name>
          <param-value>UTF-8</param-value>
      </init-param>
      <!-- 强制编码格式 -->
      <init-param>
          <param-name>forceEncoding</param-name>
          <param-value>true</param-value>
      </init-param>
  </filter>
  <filter-mapping>
      <filter-name>encoding</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>
 
</web-app>