找一个过滤器

Question

可以防止出现中文乱码，并且可以更改编码方式

Answer 1

<filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

Answer 2

。package dw05prj.util.filter; 
import javax.servlet.Filter; 
import javax.servlet.FilterConfig; 
import javax.servlet.ServletException; 
import javax.servlet.ServletRequest; 
import javax.servlet.ServletResponse; 
import javax.servlet.FilterChain; 
import java.io.IOException; 
/*页面字符集过滤流*/ 
/* 
在web.xml中配制的例子 
<filter> 
<filter-name>CharEncodingFilter</filter-name> 
<filter-class>dw05prj.util.filter.CharEncodingFilter</filter-class> 
<init-param> 
<param-name>charset</param-name> 
<param-value>GBK</param-value> 
</init-param> 
</filter> 
<filter-mapping> 
<filter-name>CharEncodingFilter</filter-name> 
<url-pattern>/*</url-pattern> 
</filter-mapping> 
*/ 
public class CharEncodingFilter implements Filter { 
private String charSet ; 
public void init(FilterConfig parm1) throws ServletException { 
charSet = parm1.getInitParameter("charset") ; 
if (charSet == null && charSet.length() < 1) 
{ 
charSet = "UTF-8" ; 
} 
System.out.println ("CharEncodingFilter--字符集: " + this.getCharSet()) ; 
} public void doFilter(ServletRequest parm1, ServletResponse parm2, 
FilterChain parm3) throws IOException, ServletException { 
// 设定字符集 
parm1.setCharacterEncoding(this.getCharSet()); 
parm3.doFilter(parm1, parm2); 
//页面中每个向服务器的请求都被过滤 -- 如 图片,js,HTML/JSP等等 
//System.out.println ("---CharEncodingFilter: " + this.getCharSet()) ; 
} 
public void destroy() { 
// TODO: Add your code here 
this.setCharSet(null) ; 
} public void setCharSet(String charSet) { 
this.charSet = charSet; 
} 
public String getCharSet() { 
return (this.charSet); 
} 
}本文来自: 脚本之家(www.jb51.net) 详细出处参考：http://www.jb51.net/article/15982.htm

Answer 3

public void doFilter(ServletRequest req,
ServletResponse res,
FilterChain chain) 
throws IOException, ServletException {
//过滤请求
req.setCharacterEncoding("utf-8");
chain.doFilter(req, res);//将请求转向下一个过滤器
//过滤响应
}在web.xml中的配置
<filter>
   <filter-name>Gbk</filter-name>
   <filter-class>filter.Gbk</filter-class>
  </filter>

Answer 4

http://blog.csdn.net/jinchun1234/archive/2009/06/18/4280998.aspx