[Java知识库]【SpringMVC】解决网页乱码问题

使用过滤器解决乱码问题

方法一：自己编写过滤器

过滤器
在自己的包下创建一个过滤器

package com.miao.filter;

import javax.servlet.*;
import java.io.IOException;

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

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        
        chain.doFilter(request,response);
    }

    public void destroy() {

    }
}

配置web.xml
filter-class的位置配置自己写的过滤器的位置

<filter>
        <filter-name>encoding</filter-name>
        <filter-class>com.miao.filter.EncodingFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

方法二：使用springmvc自带过滤器

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

• 注意，url-pattern的位置一定要写 / * 不然会无法过滤jsp页面导致乱码

如果以上两个方法都没有解决乱码问题，就去查看tomcat的配置是否有问题

apache-tomcat-8.0.46->conf->server.xml

在Connertor的末尾加上 URIEncoding="UTF-8"

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