struts表单乱码的解决方法

表单中文乱码的处理

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struts中Action执行execute方法时，request.getCharacterEncoding()得到的值为空，在有中文时，会出现乱码现象。以下有三种方法，虽然都是参考网上的，不过还是手撸并测试了一下，这三种方式都还可以。

1. 使用过滤器重新设置request的编码，个人比较喜欢这种方法

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 CharacterEncodingFilter implements Filter {    private String encoding;    @Override    public void destroy() {        // TODO Auto-generated method stub    }    @Override    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)            throws IOException, ServletException {        // TODO Auto-generated method stub        if(request.getCharacterEncoding() == null) {            System.out.println("Request原编码为:" + request.getCharacterEncoding());            if(this.encoding != null) {                request.setCharacterEncoding(this.encoding);                System.out.println("Filter设置Encoding为:" + encoding);            }        }        chain.doFilter(request, response);    }    @Override    public void init(FilterConfig filterConfig) throws ServletException {        // TODO Auto-generated method stub        this.encoding = filterConfig.getInitParameter("encoding");    }}

web.xml文件配置, 这里当表单保存或者修改时，才会被过滤器拦截，设置requset的编码为utf-8

<web-app>  <filter>    <filter-name>CharacterEncodingFilter</filter-name>    <filter-class>com.struts.filter.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>/EmployeeAction_Save.do</url-pattern>    <url-pattern>/EmployeeAction_Update.do</url-pattern>  </filter-mapping> </web-app>

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2.在ActionForm里的set方法时，对字符串重新使用utf-8编码，不过这种方法可能有点不方便

public void setName(String name){    try {            name = new String(name.getBytes("iso-8859-1"), "UTF-8");        } catch (UnsupportedEncodingException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        this.name = name;}

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3.第三种方法是改写ActionServlet，重写process()方法

public class MyActionServlet extends ActionServlet {    @Override    protected void process(HttpServletRequest request, HttpServletResponse response)            throws IOException, ServletException {        // TODO Auto-generated method stub        request.setCharacterEncoding("utf-8");        System.out.println("设置编码为utf-8");        super.process(request, response);    }}

web.xml配置文件

  <servlet>    <servlet-name>ActionServlet</servlet-name>    <servlet-class>com.struts.web.MyActionServlet</servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>ActionServlet</servlet-name>    <url-pattern>*.do</url-pattern>  </servlet-mapping>