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# 具体遇到的问题
# 报错信息的截图

# 相关课程内容截图

# 尝试过的解决思路和结果
我猜是encoding的问题，不过也没看出个所以然
# 粘贴全部相关代码，切记添加代码注释（请勿截图）

<filter>
    <filter-name>encoding</filter-name>
    <filter-class>com.imooc.oa.global.EncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>utf-8</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>encoding</filter-name>
    <url-pattern>/</url-pattern>
</filter-mapping>

package com.imooc.oa.global;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class EncodingFilter implements Filter {
private String encoding="utf-8";
    public void init(FilterConfig filterConfig) throws ServletException {
if (filterConfig.getInitParameter("encoding")!=null){
encoding = filterConfig.getInitParameter("encoding");

        }
    }

public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request =(HttpServletRequest)servletRequest;
        HttpServletResponse response = (HttpServletResponse)servletResponse;
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
        filterChain.doFilter(request,response);
    }

public void destroy() {

    }
}

​

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