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JAVA WEB传输出错

2024-07-08 20:53:20   226人阅读

最近使用Springmvc，GET传输参数的时候，经常出错误，下面介绍添加一个Filter的方法，可以解决这个问题。既支持POST方式也支持GET方式。

首先写一个Filter

package com.qunar.filter;import java.io.IOException;import java.io.UnsupportedEncodingException;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.HttpServletRequestWrapper;import javax.servlet.http.HttpServletResponse;public class CharacterEncodingFilter implements Filter {    private String encode = "UTF-8";// 默认UTF-8编码    public void init(FilterConfig filterConfig) throws ServletException {        String encoding = filterConfig.getInitParameter("encode");        if (encoding != null) {            encode = encoding;        }    }    public void doFilter(ServletRequest req, ServletResponse resp,            FilterChain chain) throws IOException, ServletException {        HttpServletRequest request = (HttpServletRequest) req;        HttpServletResponse response = (HttpServletResponse) resp;        // 设置request编码        request.setCharacterEncoding(encode);        // 设置相应信息        response.setContentType("text/html;charset=" + encode);        response.setCharacterEncoding(encode);        chain.doFilter(new CharacterEncodingRequest(request), response);    }    public void destroy() {    }}/** * 对Get方式传递的请求参数进行编码 */class CharacterEncodingRequest extends HttpServletRequestWrapper {    private HttpServletRequest request = null;    public CharacterEncodingRequest(HttpServletRequest request) {        super(request);        this.request = request;    }    /**     * 对参数重新编码     */    @Override    public String getParameter(String name) {        String value = super.getParameter(name);         if(value =http://www.mamicode.com/= null)               return null;         String method = request.getMethod();        if ("get".equalsIgnoreCase(method)) {            try {                value = new String(value.getBytes("ISO8859-1"), request.getCharacterEncoding());            } catch (UnsupportedEncodingException e) {                e.printStackTrace();            }        }        return value;    }}

然后在xml里面添加这个filter

<filter>      <filter-name>characterEncodingFilter</filter-name>      <filter-class>com.qunar.filter.CharacterEncodingFilter</filter-class>      <init-param>          <param-name>encode</param-name>          <param-value>UTF-8</param-value>      </init-param>  </filter>  <filter-mapping>      <filter-name>characterEncodingFilter</filter-name>      <url-pattern>/*</url-pattern>  </filter-mapping>

 

当然有一些人为了单纯解决GET的编码问题，修改整个站点的编码，直接修改Connector也可以。

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

 


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