jsp_filter 编码 过滤器

public class CharacterEncodingFilter implements Filter {
private String edcoding=null;
private FilterConfig filterConfig=null;
private boolean ignore=true;

public void destroy() {
edcoding=null;
filterConfig=null;
}

public void doFilter(ServletRequest request, ServletResponse response,
FilterChain filterChain) throws IOException, ServletException {
if(ignore==true||request.getCharacterEncoding()==null){
String encoding=setCharacterEncoding(request);
if(encoding!=null){
request.setCharacterEncoding(encoding);

}
}
filterChain.doFilter(request, response);
}

public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig=filterConfig;
this.edcoding=filterConfig.getInitParameter("encoding");
String value=filterConfig.getInitParameter("ignore");
if(value==null){
this.ignore=true;
}else if(value.equalsIgnoreCase("true")){
this.ignore=true;

}else{
this.ignore=false;
}

}
public String setCharacterEncoding(ServletRequest request){
return this.edcoding;
}
}

<filter>
<filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

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() {
this.setCharSet(null) ;
}
public void setCharSet(String charSet) {
this.charSet = charSet;
}
public String getCharSet() {
return (this.charSet);
}
}