一、接收对象参数
jsp页面:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/user/login.do">
姓名:<input name="name" type="text" />
年龄:<input name="age" type="text" />
<input type="submit" value="注册" />
</form>
</body>
</html>
Entity:
package cn.wechatbao.entity;
public class Student {
private String name;
private int age;
//省略getter、setter
}
Controller:
@RequestMapping("/login.do")
public ModelAndView login(Student student) throws Exception {
System.out.println("name="+student.getName());
System.out.println("age="+student.getAge());
ModelAndView mv = new ModelAndView();
mv.addObject("student", student);
mv.setViewName("/WEB-INF/jsp/success.jsp");
return mv;
}
成功的提示页面(success.jsp):
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>SpringMVC1</title>
</head>
<body>
${student }
</body>
</html>
注意:整体接收需要表单的name属性值与实体的属性名一致。比如input的name为age,那么与之对应的实体类中,必须有一个age属性,并且该age属性需要有getter、setter方法。
二、域属性参数接收
域属性参数就是在A类中有一个为B类的属性。这时,我们对刚才的代码进行修改。新增School类。如下:
public class School {
private String sname;
private String address;
//省略getter、setter
}
修改Student类,如下:
public class Student {
private String name;
private int age;
private School school;
//省略getter、setter
}
修改index.jsp页面的Form表单,如下:
<form action="${pageContext.request.contextPath }/user/login.do">
姓名:<input name="name" type="text" />
年龄:<input name="age" type="text" />
学校名称:<input name="school.sname" type="text" />
学校地址:<input name="school.address" type="text" />
<input type="submit" value="注册" />
</form>
三、接收路径变量
Controller:
@RequestMapping("/{name}/{age}/register.do")
public ModelAndView register(@PathVariable String name,@PathVariable int age) throws Exception {
System.out.println("name="+name);
System.out.println("age="+age);
ModelAndView mv = new ModelAndView();
mv.addObject("name", name);
mv.addObject("age", age);
mv.setViewName("/WEB-INF/jsp/success.jsp");
return mv;
}
注意:只是使用了一个@PathVariable的注解,该注解也可以指定name,如@PathVariable("pname")之类的。