index.jsp
<body> <form action="<%=request.getContextPath() %>/AddServlet" method="post"> <table align="center" border="1" width="330"> <tr><td align="center" colspan="2"> </td></tr> <tr> <td> 图书编号</td> <td><input type="text" name="id"/></td> </tr> <tr> <td>图书名称</td> <td><input type="text" name="name"/></td> </tr> <tr><td align="center" colspan="2"> <input type="submit" value="submit"/> </td> </tr> </table> </form> </body>
AddServlet.java
public class AddServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out=response.getWriter(); String id=request.getParameter("id"); String name=request.getParameter("name"); out.print("图书编号："+id+"<br>"); out.println("图书名称"+name+"<br>"); out.flush(); out.close(); }
CharactorFilter .java
public class CharactorFilter implements Filter { String encoding = null; @Override public void destroy() { encoding = null; } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { // 判断字符编码是否为空 if(encoding != null){ // 设置request的编码格式 request.setCharacterEncoding(encoding); // 设置response字符编码 response.setContentType("text/html; charset="+encoding); } // 传递给下一过滤器 chain.doFilter(request, response); } @Override public void init(FilterConfig filterConfig) throws ServletException { // 获取初始化参数 encoding = filterConfig.getInitParameter("encoding"); } } }
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name>Charactor</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>CharactorFilter</filter-name> <filter-class>com.atguigu.charactor.CharactorFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharactorFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>AddServlet</servlet-name> <servlet-class>com.atguigu.charactor.AddServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>AddServlet</servlet-name> <url-pattern>/AddServlet</url-pattern> </servlet-mapping> </web-app>
是3.0版本的,建的是servlet,filter 但是还是把自带的隐射去掉在web.xml中写
