SpringMVC默认的参数类型

SpringMVC底层是Servlet
HttpServletRequest、HttpServletResponse、HttpSession、Model、Map、ModelMap
注意：Model 、Map、ModelMap、request一样，都使用请求作用域进行数据传递。必须使用请求转发

通过作用域域传递数据

@Controllerpublic class DataForward {@RequestMapping("/data")public String dataF(HttpServletRequest request,HttpServletResponse response,HttpSession session,Map map,Model model,ModelMap modelMap){User u1 =new User(01,"张三request");User u2 =new User(01,"张三session");User u3 =new User(01,"张三model");User u4 =new User(01,"张三map");User u5 =new User(01,"张三map");//向作用域存储数据request.setAttribute("user1",u1);session.setAttribute("user2",u2);model.addAttribute("user3",u3);map.put("user4",u4);modelMap.addAttribute("user5",u5);return "dataPage";}}

dataPage.jsp<%--//向作用域提取数据--%>request:${user1.name}
session:${user2.name}
model:${user3.name}
map:${user4.name}
modelMap:${user5.name}

Index.jsp -传递数据-> dataPage.jsp

index.jsp页面data

dataPage.jsp页面来自index.jsp页面的数据: ${param.name}

forEach标签案例

Servlet将集合放入request域
StaffDao mapper = sqlSessionAuto.getMapper(StaffDao.class);List staffs = mapper.selectALL();
//将查询结果放入请求域中
request.setAttribute("staffs",staffs);

Jsp页面Foreach标签使用案例
<%--引入核心标签库--%>
<%@ taglib  prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
${s.id}${s.name}${s.diploma}${s.title}${s.marriage}${s.status}${s.workTime}删除修改工资条