Structs2或SSH項目中解決亂碼問題

最近做項目遇到了亂碼問題，稍微研究了下，總結了點自己的心得，輕噴。

第一種方式：配置攔截器，推薦。

package com.guigu.store.utils;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
 
public class MyCharacterEncodingFilter implements Filter {
     
    protected FilterConfig filterConfig = null;
    protected String encoding = "";
    public void destroy() {
        filterConfig = null;
        encoding = null;
    }
 
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
            FilterChain filterChain) throws IOException, ServletException {
        if(encoding != null && !"".equals(encoding))
            servletRequest.setCharacterEncoding(encoding);
        filterChain.doFilter(servletRequest, servletResponse);
    }
 
    public void init(FilterConfig filterConfig) throws ServletException {
        this.filterConfig = filterConfig;
        this.encoding = filterConfig.getInitParameter("encoding");
    }
 
}

配置攔截器，要配置在Structs核心過濾器之前哦，否則無效。

<filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>com.guigu.store.utils.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
      <filter-name>characterEncodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
    </filter-mapping>
	<!-- Struts2 核心 過濾器 -->
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

2.在程序中轉碼

		HttpServletResponse response = null;
		HttpServletRequest request = null;
		response = ServletActionContext.getResponse();
		request = ServletActionContext.getRequest();
		request.setCharacterEncoding("utf-8");
		response.setContentType("text/html;charset=utf-8");

3.如果你是用的get方式提交，可以在tomcat中server.xml配置一下編碼方式，post則不需要

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

4.不推薦的一種方式，對你需要用到的參數進行強制轉碼

String str = new String(request.getParameter("parameter").getBytes("ISO-8859-1"),"utf-8") ；