一、Spring MVC入门环境搭建

SpringMVC的环境搭建
先创建一个webapp的Maven工程
pom依赖

  <dependencies>
  	<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/javax.servlet/servlet-api -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.1</version>
    </dependency>

  </dependencies>

	**页面中的所有东西都只会到web.xml中来找有没有配置，它识别不了controller，所以需要在web.xml中配置**

配置一下web.xml，前端控制器是一个核心，把它配置上，让它在类一开始时就去加载springmvc.xml
映射中我们让所有的请求都经过前端控制器！编码过滤器是为了解决掉浏览器post请求中中文乱码问题！

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <!--  配置编码过滤器-->
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>utf-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!--配置前端控制器-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>

在resources下创建springmvc配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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/mvc
							http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!--    开启注解扫描-->
    <context:component-scan base-package="com.lp"/>
    <!--配置视图解析器-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--    自动类型转换-->
    <bean id="conversionServiceFactoryBean" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <bean class="com.lp.utils.Convert"/>
            </set>
        </property>
    </bean>
    <!--    开启SpringMVC框架注解的支持-->
    <mvc:annotation-driven conversion-service="conversionServiceFactoryBean"/>
</beans>

写这样一个工具类，实现日期的转换，即字符串类型转换为日期类型

package com.lp.utils;

import org.springframework.core.convert.converter.Converter;

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

/**
 * @Date 2020/6/3 15:03
 * @Author luopeng
 */
public class Convert implements Converter<String, Date> {
    @Override
    public Date convert(String s) {
        if (s == null) {
            throw new RuntimeException("日期为空！");
        }
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        try {
            return dateFormat.parse(s);
        } catch (ParseException e) {
            throw new RuntimeException("日期转换错误！");
        }
    }
}

传对象时用到的两个对象
Acocunt

package com.lp.entity;

import java.io.Serializable;

/**
 * @Date 2020/6/3 13:25
 * @Author luopeng
 */
public class Account implements Serializable {
    private String id;
    private Double money;

    @Override
    public String toString() {
        return "Account{" +
                "id='" + id + '\'' +
                ", money=" + money +
                '}';
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }
}

User

package com.lp.entity;

import java.io.Serializable;
import java.util.Date;
import java.util.List;
import java.util.Map;

/**
 * @Date 2020/6/3 13:23
 * @Author luopeng
 */
public class User implements Serializable {
    private String username;
    private Integer age;
    private Date birth;
//  private Account account;
    private List<Account> accountList;
    private Map<String,Account> map;
    @Override
    public String toString() {
        return "User{" +
                "username='" + username + '\'' +
                ", age=" + age +
                ", birth=" + birth +
                ", accountList=" + accountList +
                ", map=" + map +
                '}';
    }

    public Date getBirth() {
        return birth;
    }

    public void setBirth(Date birth) {
        this.birth = birth;
    }
    public List<Account> getAccountList() {
        return accountList;
    }

    public void setAccountList(List<Account> accountList) {
        this.accountList = accountList;
    }

    public Map<String, Account> getMap() {
        return map;
    }

    public void setMap(Map<String, Account> map) {
        this.map = map;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

   /* public Account getAccount() {
        return account;
    }

    public void setAccount(Account account) {
        this.account = account;
    }*/
}

controller

package com.lp.controller;

import com.lp.entity.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * @Date 2020/6/3 11:29
 * @Author luopeng
 */
@Controller
@RequestMapping("/hello")
public class HelloController {

    /**
     * 页面的跳转
     *
     * @return
     */
    @RequestMapping("/say")
    public String sayHello() {
        System.out.println("Hello SpringMVC!");
        return "success";
    }

    /**
     * 传参
     *
     * @param username
     * @param password
     * @return
     */
    @RequestMapping("/params")
    public String sendParams(String username, String password) {
        System.out.println(username);
        System.out.println(password);
        return "success";
    }

    /**
     * 传对象
     *
     * @param user
     * @return
     */
    @RequestMapping("/obj")
    public String sendParams(User user) {
        System.out.println(user);
        return "success";
    }
}

success.jsp页面（注意要与前面视图解析器所设置的路径相符合）

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>success</title>
</head>
<body>
<h1>成功</h1>
</body>
</html>

首页

<%--
  Created by IntelliJ IDEA.
  User: 罗鹏
  Date: 2020/6/3
  Time: 11:27
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>入门程序</title>
</head>
<body>
<h2>入门程序</h2>
<a href="/hello/say">入门Application</a><br>
<a href="/hello/params?username=张三&password=123456">传参测试</a><br>
<%--
<form action="/hello/obj" method="post">
    用户名：<input type="text" name="username"><br>
    年龄：<input type="text" name="age"><br>
    账户ID：<input type="text" name="account.id"><br>
    账户余额：<input type="text" name="account.money"><br>
    <input type="submit" name=""><br>
</form>--%>
------------------------------------------------------------------------------------------------------------
<form action="/hello/obj" method="post">
    用户名：<input type="text" name="username"><br>
    年龄：<input type="text" name="age"><br>
    生日：<input type="date" name="birth"><br>

    账户ID：<input type="text" name="accountList[0].id"><br>
    账户余额：<input type="text" name="accountList[0].money"><br>
    <%--map中key为1的id--%>
    账户ID：<input type="text" name="map['1'].id"><br>
    <%--map中key为1的money--%>
    账户余额：<input type="text" name="map['1'].money"><br>
    <input type="submit" name=""><br>
</form>
</body>
</html>

一个基本框架搭建初步完成

一、Spring MVC入门环境搭建

猜你喜欢