中文亂碼處理及過濾器的定義.ppt

1、Jsp中文亂碼處理及過濾器的使用,主講：曹瑩,Jsp中中文亂碼的處理,1.轉(zhuǎn)換成字節(jié)數(shù)組之后，再重新生成字符串 2.對每一個JSP頁面使用request.setCharacterEncoding(“GBK) 3.使用過濾器過濾實現(xiàn)中文亂碼 4.先編碼然后再解碼 java url 的encoder和decoder .URLEncoder和.URLDecoder,過濾器類的定義,過濾器類必須實現(xiàn)javax.servlet.Filter 該類必須實現(xiàn)三個方法： init(FilterConfig arg0 ） destroy() doFilter(ServletRequest arg0, Servl

2、etResponse arg1, FilterChain arg2),利用過濾器修改中文亂碼,package filter; 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.ServletRespons

3、e; import javax.servlet.http.*;,public class ModifyCodeFilter implements Filter protected FilterConfig filterConfig; private String targetEncoding=GBK; public void destroy() this.filterConfig=null; public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException,

4、ServletException HttpServletRequest srequest=(HttpServletRequest)arg0; try srequest.setCharacterEncoding(this.targetEncoding); arg2.doFilter(arg0,arg1); catch(Exception e) e.printStackTrace(); public void init(FilterConfig arg0) throws ServletException this.filterConfig=arg0; this.targetEncoding=arg

5、0.getInitParameter(code); ,web.xml項目配置文件的設(shè)置, modifycode filter.ModifyCodeFilter eng_china code GBK modifycode /* ,利用過濾器修改留言中的非法信息,package filter; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.Servlet

6、Exception; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.*;,public class ContentFilter implements Filter private FilterConfig filterconfig=null; String str=我們的,你們的,他們的; String content=; public void destroy() this.filterconfig=null; public void d

7、oFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException HttpServletRequest hsrequest=(HttpServletRequest)arg0; content=hsrequest.getParameter(msgcontent); try if(content!=null) int i=0; for(i=0;istr.length;i+) String substr=stri; if(content.indexOf(substr)=-1) hsrequest.setAttribute(msgcontent, content); else content=content.replace(substr,xxx); hsrequest.setAttribute(msgcontent, content); arg2.doFilter(arg0, arg1); catch(Exception e) e.printStackTrace(); public void init(FilterConfig arg0) throws S