JSP解决向Action传参乱码问题

原创

ccna_zhang 2022-09-05 16:57:54 博主文章分类：SSH ©著作权

文章标签 action jsp encoding string import 文章分类 OpenStack 云计算

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1：可以写一个字符过滤器来解决

package com.capinfotech.filter;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;

public class SetCharacterEncodingFilter extends HttpServlet implements Filter {

  protected String encoding = null;
  protected FilterConfig filterConfig = null;
  protected boolean ignore = true;

  // Handle the passed-in FilterConfig
  public void init(FilterConfig filterConfig) throws ServletException {

    this.filterConfig = filterConfig;
    this.encoding = filterConfig.getInitParameter("encoding");
    String value = filterConfig.getInitParameter("ignore");
    if (value == null) {
      this.ignore = true;
    } else if (value.equalsIgnoreCase("true")) {
      this.ignore = true;
    } else if (value.equalsIgnoreCase("yes")) {
      this.ignore = true;
    } else {
      this.ignore = false;
    }

  }

  // Process the request/response pair

  public void doFilter(ServletRequest request, ServletResponse response,
      FilterChain chain) throws IOException, ServletException {

    // Conditionally select and set the character encoding to be used
    if (ignore || (request.getCharacterEncoding() == null)) {
      String encoding = selectEncoding(request);
      if (encoding != null) {
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
      }
    }

    // Pass control on to the next filter
    chain.doFilter(request, response);

  }

  protected String selectEncoding(ServletRequest request) {
    return (this.encoding);
  }

  // Clean up resources
  public void destroy() {
    this.encoding = null;
    this.filterConfig = null;
  }
  
}

在web.xml里进行配置，一定要配置在Struts2的前面

<filter>
    <filter-name>setcharacterencodingfilter</filter-name>
<filter-class>com.capinfotech.filter.SetCharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>ignore</param-name>
      <param-value>true</param-value>
    </init-param>
 </filter>
 
 <filter-mapping>
    <filter-name>setcharacterencodingfilter</filter-name>
    <url-pattern>/*</url-pattern>
 </filter-mapping>

2：修改Tomcat下面conf下的server.xml的内容

<Connector port="8088" protocol="HTTP/1.1" 
               connectionTimeout="20000" 
               redirectPort="8443" 
               useBodyEncodingForURI="true" URIEncoding="utf-8"
               />