java web过滤器处理乱码
我们在servlet页面中读取前台的数据时 经常会出现乱码问题
而自己每次都要在servlet中使用
Stringencoding="utf-8"; request.setCharacterEncoding(enconding); response.setCharacterEncoding(enconding);
来进行编码的转换 会很麻烦
所以使用过滤器我们可以避免这些重复的工作
web.xml配置
encodingFilter com.scx.filter.Filter encoding utf-8 encodingFilter /*
Filter
packagecom.scx.filter; importjava.io.IOException; importjavax.servlet.FilterChain; importjavax.servlet.FilterConfig; importjavax.servlet.ServletException; importjavax.servlet.ServletRequest; importjavax.servlet.ServletResponse; importjavax.servlet.http.HttpServletRequest; importjavax.servlet.http.HttpServletResponse; publicclassFilterimplementsjavax.servlet.Filter{ //读取过滤器配置文件 privateFilterConfigconfig; publicvoiddestroy(){ //TODOAuto-generatedmethodstub } publicvoiddoFilter(ServletRequestarg0,ServletResponsearg1, FilterChainchain)throwsIOException,ServletException{ //TODOAuto-generatedmethodstub HttpServletRequestrequest=(HttpServletRequest)arg0; HttpServletResponseresponse=(HttpServletResponse)arg1; Stringencoding=config.getInitParameter("encoding"); if(encoding==null||"".equals(encoding)){ encoding="utf-8"; } request.setCharacterEncoding(encoding); response.setCharacterEncoding(encoding); chain.doFilter(request,response); } publicvoidinit(FilterConfigarg0)throwsServletException{ //TODOAuto-generatedmethodstub config=arg0; } }
这样的话 在servlet里面读取到的数据就不会出现乱码的情况了
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