中文乱码处理及过滤器的定义

1、Jsp中文乱码处理及过滤器的使用1Jsp中中文乱码的处理1.转换成字节数组之后，再重新生成字符串2.对每一个JSP页面使用request.setCharacterEncoding(“GBK)3.使用过滤器过滤实现中文乱码4.先编码然后再解码 java url 的encoder和decoder.URLEncoder和.URLDecoder2过滤器类的定义过滤器类必须实现javax.servlet.Filter该类必须实现三个方法：init(FilterConfig arg0 ）destroy()doFilter(ServletRequest arg0, ServletResponse arg1,

2、 FilterChain arg2)3利用过滤器修改中文乱码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、项目配置文件的设置 modifycode filter.ModifyCodeFilter eng_china code GBK modifycode /* 6利用过滤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=我们的,你们的,他们的;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