spring mvc post 请求乱码

ゞ浴缸里的玫瑰 2022-08-14 05:40 16阅读 0赞

用spring mvc，发送$.post(\{ \});请求 而服务器接受到的数据，中文乱码。

轻松配置一下，即可迎刃而解。web.xml配置以下代码。

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

这里就是使用了 spring mvc给我们内置的一个过滤器CharacterEncodingFilter而已,如何你写过过滤器， 打开spring mvc的源码。一看就懂。

如果乱码问题依旧存在,继续往下看,好戏还在后面！！！

源码如下：

/* * Copyright 2002-2007 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
    
    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;
    
    /** * Servlet 2.3/2.4 Filter that allows one to specify a character encoding for * requests. This is useful because current browsers typically do not set a * character encoding even if specified in the HTML page or form. * * <p>This filter can either apply its encoding if the request does not * already specify an encoding, or enforce this filter's encoding in any case * ("forceEncoding"="true"). In the latter case, the encoding will also be * applied as default response encoding on Servlet 2.4+ containers (although * this will usually be overridden by a full content type set in the view). * * @author Juergen Hoeller * @since 15.03.2004 * @see #setEncoding * @see #setForceEncoding * @see javax.servlet.http.HttpServletRequest#setCharacterEncoding * @see javax.servlet.http.HttpServletResponse#setCharacterEncoding */
    public class CharacterEncodingFilter extends OncePerRequestFilter { 
    
        private String encoding;
    
        private boolean forceEncoding = false;
    
    
        /** * Set the encoding to use for requests. This encoding will be passed into a * {@link javax.servlet.http.HttpServletRequest#setCharacterEncoding} call. * <p>Whether this encoding will override existing request encodings * (and whether it will be applied as default response encoding as well) * depends on the {@link #setForceEncoding "forceEncoding"} flag. */
        public void setEncoding(String encoding) {
            this.encoding = encoding;
        }
    
        /** * Set whether the configured {@link #setEncoding encoding} of this filter * is supposed to override existing request and response encodings. * <p>Default is "false", i.e. do not modify the encoding if * {@link javax.servlet.http.HttpServletRequest#getCharacterEncoding()} * returns a non-null value. Switch this to "true" to enforce the specified * encoding in any case, applying it as default response encoding as well. * <p>Note that the response encoding will only be set on Servlet 2.4+ * containers, since Servlet 2.3 did not provide a facility for setting * a default response encoding. */
        public void setForceEncoding(boolean forceEncoding) {
            this.forceEncoding = forceEncoding;
        }
    
    
        @Override
        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) {
                    response.setCharacterEncoding(this.encoding);
                }
            }
            filterChain.doFilter(request, response);
        }
    
    }

如果乱码依旧存在。

配置tomcat server.xml文件

<Connector port="8080" /> 在里面加<Connector port="8080" uRIEncoding="utf-8" />

介绍完毕。

如有问题，请留言交流。