SpringMVC学习笔记7----对于项目中乱码的处理方式

8.乱码的处理

1.过滤器Filter

get不会出现乱码，post会出现乱码

public class EncodeingFilter implements Filter {
   
    public void init(FilterConfig filterConfig) throws ServletException {
   

    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
   
        servletRequest.setCharacterEncoding("utf-8");
        servletResponse.setCharacterEncoding("utf-8");
        filterChain.doFilter(servletRequest,servletResponse);

    }

    public void destroy() {
   

    }
}

 <filter>
        <filter-name>encoding</filter-name>
        <filter-class>com.kuang.Filter.EncodeingFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

<mark>这里的/*是包含所有的文件，包括.jsp</mark>

<mark>/是不包含.jsp</mark>,只能处理部分

SprIngMVC提供的过滤器

 <filter>
        <filter-name>encoding1</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    
        <init-param>
            <param-name>encoding1</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    
    <filter-mapping>
        <filter-name>encoding1</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    

tomcat编码解决

D:\tomcat\apache-tomcat-8.5.4\conf\server.xml

 <Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" URIEncoding="UTF-8" />

2.直接设置

req.setCharacterEncoding(“utf-8”);