4.请求参数

入参处理:

默认获取请求参数: 直接在方法参数列表添加要获取的参数

• @RequestParam:
• @RequestHeader
• @CookieValue

SpringMVC支持直接在参数上写原生API:

• HttpServletRequest
• HttpServletResponse
• HttpSession
• java.security.Principal : 与https, 安全协议相关
• Local : 与国际化有关
• InputStream: ServletInputStream inputStream = request.getInputStream();
• OutputStream: ServletOutputStream outputStream = response.getOutputStream();
• Reader: BufferedReader reader = request.getReader();
• Writer: PrintWriter writer = response.getWriter();

解决请求乱码

添加字符编码filter, 该filter应放在其他filt

er之前

<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>