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Struts中文的乱码经典解决方法

2012-10-08 17:12 218 查看
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();

} } } }

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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