spring2配置 utf-8解决-优快云博客

本文链接：https://blog.youkuaiyun.com/wangzi6hao/article/details/83495250

本文详细介绍了如何在Spring中通过配置CharacterEncodingFilter来解决字符编码问题，确保应用能够正确处理UTF-8编码的数据。

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spring2配置 utf-8解决

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

查看以下源码后：

package org.springframework.web.filter;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.util.ClassUtils;


public class CharacterEncodingFilter extends OncePerRequestFilter {

    private final static boolean responseSetCharacterEncodingAvailable = ClassUtils.hasMethod(
            HttpServletResponse.class, "setCharacterEncoding", new Class[] {String.class});


    private String encoding;

    private boolean forceEncoding = false;



    public void setEncoding(String encoding) {
        this.encoding = encoding;
    }


    public void setForceEncoding(boolean forceEncoding) {
        this.forceEncoding = forceEncoding;
    }


    protected void doFilterInternal(
            HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {

        if (this.encoding != null && (this.forceEncoding || request.getCharacterEncoding() == null)) {
            request.setCharacterEncoding(this.encoding);
            if (this.forceEncoding && responseSetCharacterEncodingAvailable) {
                response.setCharacterEncoding(this.encoding);
            }
        }
        filterChain.doFilter(request, response);
    }

}

发现原来少个配置：

<filter>
        <filter-name>encodingFilter</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>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>