此处的整合是一次比较简单的整合,并没有用到工程的拆分和聚合思想。
1.搭建简单的整合环境
整合思路
1.先搭建整合环境,此处直接通过骨架创建web工程
2.完成Spring的搭建配置
3.使用Spring整合SpringMVC
4.使用Spring整合Mybatis
示例代码
创建数据库和表结构
create database ssm;
create table account(
id int primary key auto_increment,
name varchar(20),
money double(7,2)
);
编写实体类
package com.liang.domain;
import java.io.Serializable;
/**
* 账户实体类
*/
public class Account implements Serializable {
private Integer id;
private String name;
private Double money;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"id=" + id +
", name='" + name + '\'' +
", money=" + money +
'}';
}
}
编写业务层接口
package com.liang.service;
import com.liang.domain.Account;
import java.util.List;
/**
* 账户的业务层接口
*/
public interface AccountService {
/**
* 查询所有账户
* @return
*/
public List<Account> findAll();
/**
* 保存账户
* @param account
*/
public void saveAccount(Account account);
}
编写持久层接口
package com.liang.dao;
import com.liang.domain.Account;
import java.util.List;
/**
* 账户的持久层接口
*/
public interface AccountDao {
/**
* 查询所有账户
* @return
*/
List<Account> findAll();
/**
* 保存账户
*/
void saveAccount(Account account);
}
编写Spring代码,保证其能够独立运行
编写spring配置文件(spring.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--配置spring创建容器时要扫描的包-->
<context:component-scan base-package="com.liang"></context:component-scan>
</beans>
使用注解配置业务层和持久层
package com.liang.service.impl;
import com.liang.dao.AccountDao;
import com.liang.domain.Account;
import com.liang.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* 账户的业务层实现类
*/
@Service(value = "accountService")
public class AccountServiceImpl implements AccountService {
@Autowired
public AccountDao accountDao;
public List<Account> findAll(){
System.out.println("AccountServiceImpl ——> findAll方法执行了...");
return accountDao.findAll();
}
@Override
public void saveAccount(Account account) {
System.out.println("AccountServiceImpl ——> saveAccount方法执行了...");
accountDao.saveAccount(account);
}
}
package com.liang.dao.impl;
import com.liang.dao.AccountDao;
import com.liang.domain.Account;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
* 账户的持久层实现类
*/
@Repository(value = "accountDao")
public class AccountDaoImpl implements AccountDao {
@Override
public List<Account> findAll() {
System.out.println("查询所有用户");
return null;
}
@Override
public void saveAccount(Account account) {
System.out.println("保存账户");
}
}
测试spring独立运行
package com.liang.test;
import com.liang.service.AccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* 测试spring环境
*/
public class SpringTest {
@Test
public void springTest(){
ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
AccountService accountService = (AccountService) applicationContext.getBean("accountService");
accountService.findAll();
System.out.println("测试完毕");
}
}
所需jar包
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.7.RELEASE</version>
</dependency>
<!--junit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
编写SpringMVC代码,保证其能够独立运行
在web.xml中配置核心控制器
<!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SpringMVC的核心控制器-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--配置初始化参数:用于读取SpringMVC的配置文件-->
<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>
<!--配置SpringMVC编码过滤器-->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!--设置过滤器中的属性值-->
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<!--过滤所有请求-->
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
编写SpringMVC的配置文件
<?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
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--配置需要扫描的包-->
<context:component-scan base-package="com.liang.controller">
<!--表示只扫描@Controller注解的java类-->
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--配置视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
<mvc:annotation-driven></mvc:annotation-driven>
</beans>
编写jsp和Controller
index.jsp页面代码
<%@page contentType="text/html; charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<body>
<h2>账户操作</h2>
<a href="SSMtest/findAllAccount">查询所有账户</a><br/><br/><br/>
<form action="SSMtest/saveAccount" method="post">
姓名:<input type="text" name="name"><br/>
金额:<input type="text" name="money"><br/>
<input type="submit" value="保存"><br/>
</form>
</body>
</html>
WEB-INF/pages/success.jsp页面代码
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
执行成功!!!<br/><br/>
<c:forEach items="${accounts}" var="account">
<c:out value="${account.id}"></c:out>
<c:out value="${account.name}"></c:out>
<c:out value="${account.money}"></c:out><br/>
</c:forEach>
</body>
</html>
控制器代码
package com.liang.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping(path = "/SSMtest")
public class AccountController {
@RequestMapping(path = "/findAllAccount")
public ModelAndView findAllAccount(){
System.out.println("controller findAll方法执行了");
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("success");
return modelAndView;
}
@RequestMapping(path = "/saveAccount")
public String saveAccount(Account account){
System.out.println("controller findAll方法执行了");
return "redirect:/SSMtest/findAllAccount";
}
}
所需jar包
<!--springmvc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.7.RELEASE</version>
</dependency>
<!--jstl-->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
使用Spring整合SpringMVC
目的:在controller中能够成功的调用service对象中的方法
思路:在项目启动的时候,就加载spring的配置文件,则需要在web.xml中配置ContextLoaderListener监听器(该监听器只能加载WEB-INF目录下的名为applicationContext.xml配置文件)
修改web.xml文件(添加监听器代码)
<!--配置spring的监听器:用于启动服务时加载容器-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--指定spring配置文件-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
修改spring配置文件
<!--配置spring创建容器时要扫描的包-->
<context:component-scan base-package="com.liang">
<!--表示不扫描@Controller注解的java类-->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
修改控制器代码
package com.liang.controller;
import com.liang.domain.Account;
import com.liang.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import java.util.List;
@Controller
@RequestMapping(path = "/SSMtest")
public class AccountController {
@Autowired
private AccountService accountService;
@RequestMapping(path = "/findAllAccount")
public ModelAndView findAllAccount(){
System.out.println("controller findAll方法执行了");
List<Account> accounts = accountService.findAll();
ModelAndView modelAndView = new ModelAndView();
modelAndView.addObject("accounts",accounts);
modelAndView.setViewName("success");
return modelAndView;
}
@RequestMapping(path = "/saveAccount")
public String saveAccount(Account account){
System.out.println("controller findAll方法执行了");
accountService.saveAccount(account);
return "redirect:/SSMtest/findAllAccount";
}
}