springmvc之工作原理以及参数传递

https://blog.csdn.net/QQ736238785/article/details/81951981

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE>
<html>
<body>
<a href="param1.do?name=mike&age=20">第一</a>
<a href="param2.do?n=mike&a=20">第二</a>
<a href="param3/mike/20">第三</a>

<form action="param4" method="post">
     <h2>测试表单数据</h2>
     name:<input type="text" name="name" value=""/><br>
     age:<input type="text" name="age" value=""><br>
     sex:<input type="radio" name="sex" value="nan">男
         <input type="radio" name="sex" value="nv">女<br>
      money <input type="text" name="money" value=""><br>
      time<input type="date" name="time" value=""><br>
      class<input type="text" name="c.name" value=""><br>
      <input type="submit" value="提交">           
</form>
</body>
</html>

controller.java

package com.nuc.springdemo;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.SessionAttributes;

@Controller
@RequestMapping
@SessionAttributes(value="time")
public class controller {

    @RequestMapping("param1.do")
     public String getValues(String name,int age) {
        System.out.println("name="+name+",age="+age);
         return "demo";
     }

    @RequestMapping("param2.do")
     public String getValuems(@RequestParam(value="n")String name,@RequestParam(value="a")int age) {
        System.out.println("name="+name+",age="+age);
         return "demo";
     }

    //restful编码风格
    @RequestMapping("param3/{name}/{age}")
     public String getValuens(@PathVariable() String name,@PathVariable() int age,Model model) {
        System.out.println("name="+name+",age="+age);
         model.addAttribute("age",age);
         return "demo";
     }  

    @RequestMapping("param4")
     public String getValuebs(Student s,HttpServletRequest req,Model model) throws ParseException {
        System.out.println(s);
        System.out.println(req.getParameter("money"));
        String time =req.getParameter("time");
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Date date = sdf.parse(time);
        model.addAttribute(date);
         return "demo";
     }  
}

Student.java

package com.nuc.springdemo;

public class Student {
   private String name;
   private int age;
   private String sex;
   private Clazz c;
    public Student() {
        super();
    }
    public Student(String name, int age, String sex, Clazz c) {
        super();
        this.name = name;
        this.age = age;
        this.sex = sex;
        this.c = c;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public Clazz getC() {
        return c;
    }
    public void setC(Clazz c) {
        this.c = c;
    }
    @Override
    public String toString() {
        return "Student [name=" + name + ", age=" + age + ", sex=" + sex + ", c=" + c + "]";
    }


}

Clazz.java

package com.nuc.springdemo;

public class Clazz {
    String name;

    public Clazz() {
        // TODO Auto-generated constructor stub
    }
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        return "Clazz [name=" + name + "]";
    }

}

demo.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ page isELIgnored="false" %>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"  prefix="fmt"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
   <h1>This is SpringMVC Demo</h1>
   ${age}<br>
   <fmt:formatDate value="${date}" pattern="yyyy-MM-dd"/>
</body>
</html>

springMvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans.xsd 
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context.xsd 
       http://www.springframework.org/schema/tx 
       http://www.springframework.org/schema/tx/spring-tx.xsd
          http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 配置扫描的包 -->
    <context:component-scan base-package="com.nuc.*" />

    <!-- 注册HandlerMapper、HandlerAdapter两个映射类 -->
    <mvc:annotation-driven />

    <!-- 访问静态资源 -->
    <mvc:default-servlet-handler />

    <!-- 视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/view/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

springmvc之工作原理以及参数传递

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