对doget和dopost区别的理解

doget与dopost的区别

GET方法用于获取固定资源，一般并不用于传参数，但是实际开发过程中很多都是在用GET方法来传递参数。

get直接访问:http://write.blog.csdn.net/postedit

web->a标签href->XMLHttprequest->servlet->doget访问固定资源返回固定数据

POST方法用于保存与更新资源，传递参数应用post方法。

post传递参数

web->from action method->post->XMLHttprequest->servlet->dopost->用于保存和更新数据

Filter过滤器举例：

doget在配置过滤器后无法修改编码格式

进入doget 中文测试:??????

dopost在配置过滤器后便可以正常执行

进入dopost 中文测试:艾索德

测试代码：

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("进入doget"); String ut=request.getParameter("name"); System.out.println("中文测试:" ut); PrintWriter out = response.getWriter(); out.print("成功吧!"); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("进入dopost"); String ut=request.getParameter("name"); System.out.println("中文测试:" ut); PrintWriter out = response.getWriter(); out.print("成功吧!"); }

过滤器

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { // TODO Auto-generated method stub request.setCharacterEncoding("utf8"); response.setCharacterEncoding("utf8"); response.setContentType("text/html;charser=utf8"); chain.doFilter(request, response); }

过滤器

<filter> <filter-name>filterCharset</filter-name> <filter-class>filter.filterCharset</filter-class> </filter> <filter-mapping> <filter-name>filterCharset</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>