中文亂碼處理及過濾器的定義

1、Jsp中文亂碼處理及過濾器的使用1Jsp中中文亂碼的處理1.轉換成字節(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.URLDecoder2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, ServletResponse arg1,

2、 FilterChain arg2)3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.ServletResponse;import javax.servlet.h

3、ttp.*;4public 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, ServletException HttpServlet

4、Request 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=arg0.getInitParameter(code);5web.xml

5、項目配置文件的設置 modifycode filter.ModifyCodeFilter eng_china code GBK modifycode /* 6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.ServletException;import javax.servlet.ServletReq

6、uest;import javax.servlet.ServletResponse;import javax.servlet.http.*;7public 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 doFilter(ServletRequest arg0, ServletResponse arg

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