Day24 SpringMVC Chinese garbled***

SpringMVC parameter binding-garbled problem

1. Why are garbled codes generated

The same binary data, using different encoding methods to
get different characters

// ????  ----> 退回到元数据的二进制----> 1011 ---->  使用UTF-8 解码 ----->中国
String newName = new String(name.getBytes("ISO8859-1"),"UTF-8");
String newName = new String(name.getBytes("GBK"),"UTF-8");

2. It is recommended to use a filter

UTF8Filter

public class UTF8Filter implements Filter {
    
    
    public void destroy() {
    
    
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
    
    
        req.setCharacterEncoding("utf-8");
        resp.setContentType("text/html;charset=utf-8");
        chain.doFilter(req, resp);
    }

    public void init(FilterConfig config) throws ServletException {
    
    

    }
}

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>

  <filter>
    <filter-name>UTF8Filter</filter-name>
    <filter-class>com.wzx.filter.UTF8Filter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>UTF8Filter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

</web-app>