彻底解决springMVC中文乱码

朱雀 2023-07-19 04:58 148阅读 0赞

**一、页面编码**

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>

**二、URL中的乱码**

改tomcat中server.xml中Connector的port=“8080”，加上一个 URIEncoding=”utf-8”

![format_png][]

**三、配置过滤器，指定所有请求的编码**

（1）配置spring的编码过滤器，为了防止spring中post方式提交的时候中文乱码，方法：修改web.xml文件，添加spring的编码过滤器

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

（2）配置编码过滤器，方法：先创建filter类，再修改web.xml文件，注意的是放在spring的编码过滤器之后

filter类：

package com.qiyuan.filter;
    
    import java.io.IOException;
    
    import javax.servlet.Filter;
    import javax.servlet.FilterChain;
    import javax.servlet.FilterConfig;
    import javax.servlet.ServletException;
    import javax.servlet.ServletRequest;
    import javax.servlet.ServletResponse;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    public class EncoidingFilter implements Filter {
    
        private String encoding="";
        @Override
        public void destroy() {
            // TODO Auto-generated method stub
    
        }
    
        
        //过滤方法  是否往下执行
        @Override
        public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain chain)
                throws IOException, ServletException {
            HttpServletRequest request=(HttpServletRequest)arg0;
            HttpServletResponse response=(HttpServletResponse)arg1;
            
            request.setCharacterEncoding(encoding);
            response.setCharacterEncoding(encoding);
    
            //过滤通行证
            chain.doFilter(request, response);
        }
    
        //根据web.xml文件的配置进行初始化  
        @Override
        public void init(FilterConfig arg0) throws ServletException {
            this.encoding = arg0.getInitParameter("Encoding");
            
        }
    
    }

修改web.xml，添加如下配置：

<filter>
        <filter-name>EncoidingFilter</filter-name>
        <filter-class>com.qiyuan.filter.EncoidingFilter</filter-class>
        
        <init-param>
           <param-name>Encoding</param-name>
           <param-value>utf-8</param-value>
        </init-param>
      </filter>
      
      <filter-mapping>
           <filter-name>EncoidingFilter</filter-name>
           <url-pattern>/*</url-pattern>
      </filter-mapping>

**五、数据库编码**

连接字符串指定编码格式

public static String URL="jdbc:mysql://127.0.0.1:3306/xxx?useUnicode=true&characterEncoding=UTF-8"

[format_png]: /images/20230528/d9923723b1a549f78b4127717bc8c784.png