SSM搭建
SSM（Spring+SpringMVC+MyBatis）框架集由Spring、SpringMVC、MyBatis三个开源框架整合而成，常作为数据源较简单的web项目的框架。.
<br>
<a href="">SpringIoc</a>
·
<a href="">SpringMVC</a>
·
<a href="">Mybatis</a>
Table of contents
环境
- jdk8
- tomcat8
- maven
- IDEA
- win7
搭建
导入web工程依赖
将基本的web工程的依赖导入
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
<scope>provided</scope>
</dependency>
<!--没有这个依赖会报错-->
<!--java.lang.NoClassDefFoundError:org/springframework/dao/support/DaoSupport-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.11.RELEASE</version>
</dependency>
导入spring工程依赖
将基本的spring工程所需要的依赖导入
springmvc依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.11.RELEASE</version>
</dependency>
基本包结构
先搭建基本包的基本结构
一般来说是在src/main/java包下新建出一个能代表你和当前项目的包的名字,比如说可是是com.selton.hellossm,
然后在这个包下面,
新建controller包,
controller包用来直接对接前端,
新建dao包,
dao包用来从数据库获取数据,
新建service包,
主要的业务逻辑需要在这里体现,
service包会调用dao层,然后提供给controller使用,
新建entities,
用来存放数据库的实体,
新建util包,
用来存放工具类,
新建constant包
用来存放一般常量
配置文件
接下来就是配置resource里的配置文件
首先是数据源连接池的配置
1.c3p0数据源连接池配置
mysql5
导入mysql5依赖
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.18</version>
</dependency>
<!--没有这个依赖会报错-->
<!--PropertyAccessException1:org.springframework.beans.MethodInvocationException:-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.11.RELEASE</version>
</dependency>
(后面不提,都是在resources下)新建文件
导入依赖
c3p0-config.properties
c3p0.driverClassName=com.mysql.jdbc.Driver
c3p0.url=jdbc:mysql://localhost:3306/databasename?useUnicode=true&characterEncoding=UTF-8
c3p0.username=root
c3p0.password=123456
c3p0.maxActive=50
c3p0.maxIdle=10
c3p0.minIdle=5
c3p0.initialSize=10
c3p0.maxWait=5000
c3p0.minPoolSize=10
接着将数据源连接池注入给mybatis
导入依赖
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
新建spring-mybatis.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:task="http://www.springframework.org/schema/task"
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-4.3.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">
<!--构建一个C3P0数据源连接池对象-->
<bean id="id_ds_c3p0" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${c3p0.driverClassName}"></property>
<property name="jdbcUrl" value="${c3p0.url}"></property>
<property name="user" value="${c3p0.username}"></property>
<property name="password" value="${c3p0.password}"></property>
<property name="maxPoolSize" value="${c3p0.maxActive}"></property>
<property name="initialPoolSize" value="${c3p0.initialSize}"></property>
<property name="minPoolSize" value="${c3p0.minPoolSize}"></property>
</bean>
<!--配置SqlSessionFactory-->
<bean name="sqlSessionFactory" id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="id_ds_c3p0"></property>
<!--<property name="configLocation" value="classpath:mybatis-config.xml"></property>-->
</bean>
<!--有了这个配置，我们就指明了我们的Mapper们，即Dao们，都在哪个包
也能使用注解了
同时不用写Dao的实现类了
-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--basePackage的值如果没有对呀好包,会报错-->
<!--PropertyAccessException 1: org.springframework.beans.MethodInvocationException:-->
<property name="basePackage" value="com.selton.hellossm.dao"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
</beans>
新建springmvc-config.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: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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--springmvc 只管扫描 controller包-->
<context:component-scan base-package="com.selton.hellossm.controller"></context:component-scan>
<!-- 让spring-mvc支持注解 -->
<mvc:annotation-driven>
</mvc:annotation-driven>
</beans>
使用
这时完成了后台的配置,让我们实现一个简单地登录系统
用基本maven项目搭建出来的工程骨架里没有webapp
我们需要在src/main下新建文件夹webapp
当然不需要手动创建
idea有自动化的功能 ---链接
在webapp下新建loginfailed.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
login failed
</body>
</html>
新建loginsuccess.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
login success
</body>
</html>
新建index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="" method="get">
name: <input type="text" name="name">
<br>
password: <input type="password" name="password">
<br>
<input type="submit" value="登录">
</form>
</body>
</html>
在web.xml中写入
<?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">
<!-- 这个全局参数的作用是：加载Spring-config的配置文件-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-config.xml</param-value>
</context-param>
<!--Spring的一个核心监听器，对Spring容器进行初始化动作
即我们以前的ApplicationContext context=new ClassPathXml.....
-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--SpringMVC的核心Servlet-->
<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<url-pattern>*.php</url-pattern>
</servlet-mapping>
<!-- 处理乱码-->
<filter>
<filter-name>encoding</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>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
完成所有的配置工作后
开始写后台代码
在数据库中新建
/*
Navicat Premium Data Transfer
Source Server : link1
Source Server Type : MySQL
Source Server Version : 50622
Source Host : localhost:3306
Source Schema : db_test1
Target Server Type : MySQL
Target Server Version : 50622
File Encoding : 65001
Date: 10/07/2018 11:22:41
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL,
`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`password` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`age` int(11) NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
SET FOREIGN_KEY_CHECKS = 1;
加入lombok依赖----链接
不使用lombok的话,去掉@Data
然后自己添上无参构造,等各种get,set
在entities中新建实体类User
@Data
public class User {
private int id;
private String name;
private String password;
private int age;
}
在dao中新建UserDao
@Repository
public interface UserDao {
@Select("SELECT password FROM user WHERE name = #{name}")
String getUserByNameAndPassword(@Param("name") String name, @Param("password") String password);
}
service包中用来存放接口
在service下新建包serviceimpl,该包下存放service包中接口的实现类
service中新建接口类UserService
public interface UserService {
boolean loginUserStatus(String name,String password);
}
在serviceimpl包下新建UserServiceImpl类实现UserService接口
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
public boolean loginUserStatus(String name, String password) {
if(name == null || "".equals(name)){
return false;
}
if(password == null || "".equals(password)){
return false;
}
String passwordByName = userDao.getPasswordByName(name);
System.out.println("passwordByName = " + passwordByName);
if (password == null){
return false;
}
if (password.equals(passwordByName)) {
return true;
}
return false;
}
}
controller下新建类UserController
@Controller
@RequestMapping("user")
public class UserController {
@Autowired
private UserService userService;
@PostMapping("userLogin")
public String userLogin(String name,String password){
if (userService.loginUserStatus(name,password)) {
return "/loginsuccess.html";
}
return "/loginfailed.html";
}
}
在index.html的form表单的action中写入
/userLogin/userLogin.php
写入form表单中的数据将会提交到这个controller中
运行,tomcat自行配置,记得将war配置到tomcat中,以及pom中packing war