struts中文乱码解决方法

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? ?初学Struts的人一定遇到过中文的乱码问题?，目前解决的方法有很多。我这有两种经典的方法和大家分享。

1，重写 RequestProcessor?? 这是最简单的方法。

?public class MyRequestProcessor extends RequestProcessor {

?@Override
?protected boolean processPreprocess(HttpServletRequest request, HttpServletResponse response) {
??try {
???request.setCharacterEncoding("UTF-8");? //在这加一行设置编码的的代吗。
??} catch (UnsupportedEncodingException e) {
???// TODO Auto-generated catch block
???e.printStackTrace();
??}
??return super.processPreprocess(request, response);
?}
?
}

页面的编码也要保持一致

<%@ page language="java" contentType="text/html;?charset=UTF-8"%>

另外在struts-config.xml 中配置 <controller> 元素

<controller processorClass="com.cao.struts.MyRequestProcessor"/>

不过该方法只对 post 请求有作用

如果对get 方法也有作用processPreprocess?方法写成

if( request.getMethod().compareToIgnoreCase("post")>=0){
???try {
????request.setCharacterEncoding("UTF-8");
???} catch (UnsupportedEncodingException e) {
????// TODO Auto-generated catch block
????e.printStackTrace();
???}
??}else{
???
???
???Iterator iter=request.getParameterMap().values().iterator();
???while(iter.hasNext())
???{
????String[] parames=(String[])iter.next();
????for (int i = 0; i < parames.length; i++) {
?????try {
??????parames[i]=new String(parames[i].getBytes("iso8859-1"),"UTF-8");
?????} catch (UnsupportedEncodingException e) {
??????e.printStackTrace();
?????}
????}???
???}???
??}

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2，通过过滤器使用请求代理

public class EncodingFilter extends javax.servlet.http.HttpServlet implements Filter {
?
?FilterConfig filterConfig;
?public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
??// TODO Auto-generated method stub
??MyRequest req = new MyRequest( (HttpServletRequest)request);//设置代理请求
??filterChain.doFilter(req, response);
??
?}

?public void init(FilterConfig arg0) throws ServletException {
??this.filterConfig = arg0;
??
?}
}
class MyRequest extends javax.servlet.http.HttpServletRequestWrapper{//自定义的代理请求类
?HttpServletRequest request;
?public MyRequest(HttpServletRequest request) {
??super(request);
??this.request = request;
?}
?public String[] getParameterValues(String name){
??String strs[] = super.getParameterValues(name);
??for(int i=0;i<strs.length;i++){
???strs[i]? = this.myEncoding(strs[i]);
??}
??return strs;
?}
?private String myEncoding(String input){
??String output ="";
??try {
???output = new String(input.getBytes("ISO-8859-1"),"UTF-8");?//注意同页面的编码保持一致
??} catch (UnsupportedEncodingException e) {
???// TODO Auto-generated catch block
???e.printStackTrace();
??}
??return output;
?}
}

?

在web.xml中进行配置

?<filter>
??<filter-name>encoding</filter-name>
??<filter-class>com.cao.struts.EncodingFilter</filter-class>
?</filter>
?<filter-mapping>
??<filter-name>encoding</filter-name>
??<url-pattern>/*</url-pattern>
?</filter-mapping>

该方法既可以用于post请求又可以用于get请求。

希望对大家有所帮助！

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