《Java Spring框架》通过IDEA搭建SpringMVC

前言

目前web框架更新迅速，学习新框架的同时也有必要了解一下之前框架的内容，SpringBoot现在比较流行，今天就来通过搭建SpringMVC来了解一下SpringMVC, SpringBoot也是基于SpringMVC的扩展。

准备

IDEA2018年版本，JDK8，Tomcat7

搭建

下一步：

根据网速等一些原因，下载jar可能比较慢。

看看目录结构

提前给大家先看看该案例的完整的目录结构

这里需要注意一点：IDEA创建的SpringMVC是没有没有指定好映射关系的，需要自己添加：

然后再设置一下web.xml：

idea会提示我们需要创建一个springmvc-config.xml 文件，并且将一下内容复制到文件中

<?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:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">

    <context:annotation-config />
    <!-- 配置自动扫描的包，完成 Bean 的创建和自动依赖注入的功能 -->
    <context:component-scan base-package="controller" />

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

</beans>

代码

创建UserController

import dto.UserDTO;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class UserController {

    @RequestMapping(value="/register.from")
    public String Register(@ModelAttribute("form") UserDTO userDTO, Model model) {
        model.addAttribute("userDTO", userDTO);
        return "success";
    }
}

创建UserDTO

public class UserDTO {
    private Integer id;
    private String username;
    private String password;
    private Integer age;

    @Override
    public String toString() {
        return "UserDTO{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", age=" + age +
                '}';
    }

    public Integer getId() {
        return id;
    }

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

    public String getUsername() {
        return username;
    }

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

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Integer getAge() {
        return age;
    }

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

然后创建JSP，在web目录下面

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!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>register page</title>
    </head>
    <body>
        <form action="register.form" method="post">
            <h5>User registration</h5>
            <p>
                <label>name </label> <input type="text" id="username" name="username" tabindex="1">
            </p>
            <p>
                <label>password </label> <input type="text" id="password" name="password" tabindex="2">
            </p>
            <p>
                <label>age </label> <input type="text" id="age" name="age" tabindex="3">
            </p>
            <p id="buttons">
                <input id="submit" type="submit" tabindex="4" value="register">
                <input id="reset" type="reset" tabindex="5" value="reset">
            </p>
        </form>
    </body>
</html>

success.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!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>success page</title>
</head>
<body>
<h5>login was successful</h5>
<p>
    name：${requestScope.userDTO.username}<br /> password：${requestScope.userDTO.password}<br /> age：${requestScope.userDTO.age}<br />
</p>
</body>
</html>