Spring MVC的配置和使用

2018-02-13 19:57:06来源:cnblogs.com作者:nnngu人点击

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Spring MVC的配置和使用

笔记仓库:https://github.com/nnngu/LearningNotes


Spring MVC需要的jar包

文章中 Spring MVC 使用的版本是 3.2.18 , 需要的 jar 包如下:

spring-webmvcjstl 1.1.2aopalliance 1.0commons-logging 1.1.1spring-aopspring-beansspring-contextspring-corespring-expressionspring-web

使用 Maven 构建的 Java 项目,需要在 pom.xml 中添加如下依赖:

        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>3.2.18.RELEASE</version>        </dependency>        <dependency>            <groupId>jstl</groupId>            <artifactId>jstl</artifactId>            <version>1.1.2</version>        </dependency>        <dependency>            <groupId>aopalliance</groupId>            <artifactId>aopalliance</artifactId>            <version>1.0</version>        </dependency>        <dependency>            <groupId>commons-logging</groupId>            <artifactId>commons-logging</artifactId>            <version>1.1.1</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aop</artifactId>            <version>3.2.18.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-beans</artifactId>            <version>3.2.18.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>3.2.18.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>3.2.18.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-expression</artifactId>            <version>3.2.18.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>3.2.18.RELEASE</version>        </dependency>

前期准备

1、在com.nnngu.entity包下创建 User.java

代码如下:

package com.nnngu.entity;import java.io.Serializable;public class User implements Serializable {    private static final long serialVersionUID = 1L;    private String name;    private Integer age;    private String pwd;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }    public String getPwd() {        return pwd;    }    public void setPwd(String pwd) {        this.pwd = pwd;    }}

2、在下图所示的位置创建两个 jsp 页面

create.jsp的代码如下:

<%--  Created by IntelliJ IDEA.  User: lijiawei  Date: 13/02/2018  Time: 14:08  To change this template use File | Settings | File Templates.--%><%@ 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>创建用户</title></head><body><form action="save" method="post">    <fieldset>        <legend>创建用户</legend>        <p>            <label>姓名:</label> <input type="text" id="name" name="name"                                      tabindex="1">        </p>        <p>            <label>年龄:</label> <input type="text" id="age" name="age"                                      tabindex="2">        </p>        <p>            <label>密码:</label> <input type="text" id="pwd" name="pwd"                                      tabindex="3">        </p>        <p id="buttons">            <input id="reset" type="reset" tabindex="4" value="重置"> <input                id="submit" type="submit" tabindex="5" value="创建">        </p>    </fieldset></form></body></html>

detail.jsp 的代码如下:

<%--  Created by IntelliJ IDEA.  User: lijiawei  Date: 13/02/2018  Time: 14:08  To change this template use File | Settings | File Templates.--%><%@ 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>用户详情</title></head><body><div id="gloobal">    <h4>创建成功</h4>    <p>    <h5>详情:</h5>    姓名:${user.name}<br/>    年龄:${user.age}<br/>    密码:${user.pwd}<br/>    </p></div></body></html>

配置Spring MVC

1、在 web.xml 文件中进行如下配置:

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"         version="3.1">    <filter>        <description>字符集过滤器</description>        <filter-name>encodingFilter</filter-name>        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>        <init-param>            <description>字符集编码</description>            <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>    <servlet>        <servlet-name>appServlet</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:spring/springmvc-context.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>appServlet</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping></web-app>

2、在下图所示的位置创建 springmvc-context.xml

springmvc-context.xml的代码如下:

<?xml version="1.0" encoding="UTF-8"?><beans:beans xmlns:beans="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" xmlns:p="http://www.springframework.org/schema/p"             xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd ">    <!-- 对包中的所有类进行扫描,以完成Bean创建和自动依赖注入的功能 -->    <context:component-scan base-package="com.nnngu"/>    <!-- 启动基于Spring MVC的注解功能,将控制器与方法映射加入到容器中 -->    <mvc:annotation-driven/>    <!-- 这个类用于Spring MVC视图解析 -->    <beans:bean id="viewResolver"                class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <beans:property name="prefix" value="/WEB-INF/pages/"/>        <beans:property name="suffix" value=".jsp"/>    </beans:bean></beans:beans>

3、编写 Controller

在上图所示的位置创建 UserController.java ,代码如下:

package com.nnngu;import com.nnngu.entity.User;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.ModelAttribute;import org.springframework.web.bind.annotation.RequestMapping;/** * 用户管理 */@Controllerpublic class UserController {    @RequestMapping("")    public String Create(Model model) {        return "create";    }    @RequestMapping("/save")    public String Save(@ModelAttribute("form") User user, Model model) { // user:视图层传给控制层的表单对象;  model:控制层返回给视图层的对象        model.addAttribute("user", user);        return "detail";    }}

测试

启动项目,在浏览器输入 localhost:8080

测试成功。

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