Jfilter统一编码工具类
2017-10-21 10:44
369 查看
package cn.web.filter; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.Map; 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.http.HttpServletRequest; import javax.servlet.http.HttpServletRequestWrapper; import javax.servlet.http.HttpServletResponse; /** * 统一编码 * @author Administrator * */ public class EncodingFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { // TODO Auto-generated method stub } @Override public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException { //1.强转 HttpServletRequest request=(HttpServletRequest) req; HttpServletResponse response=(HttpServletResponse) resp; //2.放行 chain.doFilter(new MyRequest(request), response); } @Override public void destroy() { // TODO Auto-generated method stub } } class MyRequest extends HttpServletRequestWrapper{ private HttpServletRequest request; private boolean flag=true; public MyRequest(HttpServletRequest request) { super(request); this.request=request; } @Override public String getParameter(String name) { if(name==null || name.trim().length()==0){ return null; } String[] values = getParameterValues(name); if(values==null || values.length==0){ return null; } return values[0]; } @Override /** * hobby=[eat,drink] */ public String[] getParameterValues(String name) { if(name==null || name.trim().length()==0){ return null; } Map<String, String[]> map = getParameterMap(); if(map==null || map.size()==0){ return null; } return map.get(name); } @Override /** * map{ username=[tom],password=[123],hobby=[eat,drink]} */ public Map<String,String[]> getParameterMap() { /** * 首先判断请求方式 * 若为post request.setchar...(utf-8) * 若为get 将map中的值遍历编码就可以了 */ String method = request.getMethod(); if("post".equalsIgnoreCase(method)){ try { request.setCharacterEncoding("utf-8"); return request.getParameterMap(); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } }else if("get".equalsIgnoreCase(method)){ Map<String,String[]> map = request.getParameterMap(); if(flag){ for (String key:map.keySet()) { String[] arr = map.get(key); //继续遍历数组 for(int i=0;i<arr.length;i++){ //编码 try { arr[i]=new String(arr[i].getBytes("iso8859-1"),"utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } } flag=false; } //需要遍历map 修改value的每一个数据的编码 return map; } return super.getParameterMap(); } }
相关文章推荐
- java缓存机制
- 用Hashtable实现简单的cache缓存
- 关于ehcache配置文件
- Map实现java缓存机制的简单实例
- java缓存框架---ehcache简单实例
- ehcache memcache redis 三大缓存男高音
- 使用Memcached改进Java企业级应用性能:架构和设置
- 使用memcached客户端Xmemcached与Spring整合
- 为什么不能用memcached存储Session?
- 关于ehcache缓存中eternal及timeToLiveSeconds和timeToIdleSeconds的说明
- javaCache实现,简单 ,但是经典
- Ehcache详细解读
- redis基础、java集成Redis入门
- java本地缓存和redis缓存
- java 缓存技术介绍
- 对线程本地ThreadLocal的理解
- javadoc生成帮助文档的时候,有哪些命名行开关?
- Javalistener中的Session配置
- 文件下载工具类,三种浏览器的解码
- Java编程—— 命名规范