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SpringMVC06以对象的方式获取前台的数据
========创建需要的两个实体类================
public class School { private String sName; private String address; public String getsName() { return sName; } public void setsName(String sName) { this.sName = sName; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public School(String sName, String address) { super(); this.sName = sName; this.address = address; } public School() { super(); } @Override public String toString() { return "School [sName=" + sName + ", address=" + address + "]"; } }
public class Student { private String name; private Integer age; private School school; public School getSchool() { return school; } public void setSchool(School school) { this.school = school; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public Student(String name, Integer age, School school) { super(); this.name = name; this.age = age; this.school = school; } public Student() { super(); } @Override public String toString() { return "Student [name=" + name + ", age=" + age + ", school=" + school + "]"; } }
=======需要的两个页面================
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="http://www.mamicode.com/"> <title>My JSP ‘index.jsp‘ starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="http://www.mamicode.com/styles.css"> --> </head> <body> <form action="user/userLogin" method="post"> <input type="text" name="name"> <input type="text" name="age"> <!-- 给关联的school对象赋值 需要加上域属性的名称. --> <input type="text" name="school.sName"> <input type="text" name="school.address"> <button type="submit">提交</button> </form> <!-- 中文的乱码 解决！ 01.get治本的： 在config文件下有server.xml中配置 URIEcoding="utf-8" 02.post治本的： 创建一个过滤器！ springMVC：给我们提供了一个Filter,只需要在web.xml中配置这个Filter即可！ <form action="user/login3" method="post"> <input type="text" name="userName"> <input type="text" name="age"> <button type="submit">提交</button> </form>--> </body> </html>
<body>
student========> ${student} <br>
</body>
@Controller @RequestMapping("/user") public class MyController { // 登录方法 01 通过请求 获取参数 @RequestMapping(value = "http://www.mamicode.com/login") public ModelAndView login(HttpServletRequest request, HttpServletResponse response) { System.out.println("进入了 login....."); // 获取前台输入的值 String name = request.getParameter("userName"); String age = request.getParameter("age"); ModelAndView mv = new ModelAndView(); mv.addObject("name", name); mv.addObject("age", age); /**addObject返回值 就是一个ModleAndView * mv.addObject("name", name).addObject("age", age); */ mv.setViewName("/WEB-INF/jsp/success.jsp"); return mv; } /** * 登录方法 02 请求中的携带的参数 * @param userName index.jsp页面中的name属性值 必须一致 * @param age index.jsp页面中的name属性值 必须一致 * @return */ @RequestMapping(value = "/login2") public ModelAndView login2(String userName, int age) { System.out.println("进入了 login2....."); ModelAndView mv = new ModelAndView(); /** * name ,age 是保存在modle中的数据，和success.jsp页面中 * el表达式对应 */ mv.addObject("name", userName); mv.addObject("age", age); mv.setViewName("/WEB-INF/jsp/success.jsp"); return mv; } /** * 请求中的携带的参数和后台接收属性名不一致 * @RequestParam("userName") * 校正 参数，必须放在需要校正的参数之前 * springmvc07/user/login3?userName=xx&age=xx */ @RequestMapping(value = "/login3") public ModelAndView login3(@RequestParam("userName") String name, int age) { System.out.println("进入了 login3....."); ModelAndView mv = new ModelAndView(); mv.addObject("name", name); mv.addObject("age", age); mv.setViewName("/WEB-INF/jsp/success.jsp"); return mv; } /** * 对象整体的传递 而且还包含了域属性的赋值 */ @RequestMapping(value = "/userLogin") public ModelAndView userLogin(Student student) { System.out.println("进入了 userLogin....."); ModelAndView mv = new ModelAndView(); mv.addObject("student", student); mv.setViewName("/WEB-INF/jsp/success.jsp"); return mv; } }
================路径变量=====================
创建对应的页面
<body> <a href="user/2/张三/add">add</a> </body>
<body> id========> ${id} <br> name========> ${name} <br> </body>
@Controller @RequestMapping("/user") public class MyController { /** * @PathVariable 这个注解使用来获取 路径变量的！ * 不同于之前的？参数 * 想获取路径变量 必须使用@PathVariable */ @RequestMapping(value = "/{id}/{name}/add") public ModelAndView add(@PathVariable int id, @PathVariable String name) { System.out.println("进入了 add....."); System.out.println(name); System.out.println(id); // 获取前台输入的值 ModelAndView mv = new ModelAndView(); mv.addObject("id", id).addObject("name", name); mv.setViewName("/WEB-INF/jsp/success.jsp"); return mv; } }
SpringMVC06以对象的方式获取前台的数据
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