springmvc之工作原理以及参数传递

男娘i 2022-03-01 08:38 154阅读 0赞

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTIwNDUwNDU_size_16_color_FFFFFF_t_70][]

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">
    
        
        <context:component-scan base-package="com.nuc.*" />
    
        
        <mvc:annotation-driven />
    
        
        <mvc:default-servlet-handler />
    
        
        <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/view/"></property>
            <property name="suffix" value=".jsp"></property>
        </bean>
    </beans>

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