SSM=Spring+SpringMvc+Mybatis
S: Spring
一款轻量级框架他最大的两大特点1.控制反转(IOC) 2.面向切面(AOP)
1.控制反转(IOC):应用此框架可以通过注解将自己编写的bean(也就是service、dao等的实体类)注入入到spring容器,每当自己使用的时候也可以通过注解将注入容器的bean从容器中取出,实现了松散耦合,也就是通常说的解耦合。
2.面向切面(AOP):通常我们所编写的代码从jsp、html⬅controller⬅service⬅dao、mapper这一连串的逻辑属于纵向的逻辑,面向切面就是将这些纵向的主要逻辑横向扩展,无关乎业务的主要逻辑,可以通过注解和实体类两种方式将事务管理、日志输出、监控等切入主业务而不影响主业务。(要是小白的话这里不容易理解,要是有需要我详细解释的话留言给我、我单独解释)
S: SpringMVC
SpringMVC是Spring的一个实现了MVC模式的web模块,主要的作用是接收用户前端页面输入的请求,SpringMVC通过他的dispatcherServlet来将此请求分发到可以处理他的处理器中,经过处理将所得数据和所展示的页面返回,展示给用户。
M: Mybatis
了解这个,先得知道ORM(Object Relational Mapping)对象关系映射,
Object:指代面向对象的编程语言,java就是体量最大的一种。
Relational :指代关系型数据库,例如Mysql、Oracle等。
Mapping:Object和Relational之间的转换。
ORM就是为了设计初衷就是为了使对象能方便转化成关系(就是关系型数据库中的一行)来存储在数据库中,Mybatis就是ORM的一种实现。
简介就到这里,咱们主要是来搭建的,粗发!
JDK版本:1.8 IDE:eclipse tomcat7 依赖导入方式:maven仓库
将所需的依赖从maven仓库引入
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.fengxiaobin</groupId>
<artifactId>TEST-SSM</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>SSM</name>
<description>test ssm</description>
<build>
<plugins>
<plugin>
<!-- 配置插件 -->
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<configuration>
<port>8080</port>
<path>/</path>
<uriEncoding>UTF-8</uriEncoding>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<!-- 设置项目编码编码 -->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<!-- spring版本号 -->
<spring.version>4.1.3.RELEASE</spring.version>
<!-- mybatis版本号 -->
<mybatis.version>3.5.1</mybatis.version>
</properties>
<dependencies>
<!-- java ee -->
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<!--解決Unable to create a Configuration, because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath. -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.2.4.Final</version>
</dependency>
<!--jsp+servlet -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<!-- jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- 单元测试(scope为test表示依赖项目仅仅参与测试相关的工作,包括测试代码的编译,执行。) -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!-- fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.51</version>
</dependency>
<!-- (1)在Maven项目中添加Oracle的驱动 -->
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.1.0</version>
</dependency>
<!-- (2)在Maven项目中添加Mysql的驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.41</version>
<scope>runtime</scope>
</dependency>
<!-- 数据库连接池(1) -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<!-- 数据库连接池(2) -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>1.6</version>
</dependency>
<!-- 数据库连接池(3) -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.9</version>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${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>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- spring aop使用AspectJ的注解功能 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.7</version>
</dependency>
<!-- mybatis/spring整合包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<!-- MyBatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!-- MyBatis的pagehelper分页插件 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.0.0</version>
</dependency>
<!-- 文件上传 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-io</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
</project>
这个里面主要配置了连接数据库的相关信息(解释后续补充)。.
(1)db.properties的配置(applicationContext.xml里面要用)
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/spring
name=root
password=123
<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 1.扫描业务层的基本包(容器自动扫描IOC组件) -->
<context:component-scan base-package="com.fengxiaobin.service"></context:component-scan>
<!-- 2.将db.properties引入(配置数据库相关参数) -->
<context:property-placeholder location="classpath:db.properties" />
<!--(3)配置DRUID数据源 可选c3p0 或bdcp 这里我用的阿里的druid --可自行添加更详细配置例如最大、最小链接数、超时时间等>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${name}" />
<property name="password" value="${password}" />
</bean>
<!--3.会话工厂bean sqlSessionFactoryBean -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 注入数据库连接池 -->
<property name="dataSource" ref="dataSource" />
<!-- 扫描pojo包 使用别名 -->
<property name="typeAliasesPackage" value="com.fengxiaobin.pojo"></property>
<!-- 扫描sql配置文件:mapper需要的xml文件
<property name="mapperLocations" value="classpath:mapper/*.xml"/> -->
<property name="configLocation" value="classpath:mybatis.xml"></property>
</bean>
<!--4.自动扫描对象关系映射 -->
<!-- 配置扫描mapper接口包,动态实现mapper接口,注入到spring容器中 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--指定会话工厂,如果当前上下文中只定义了一个则该属性可省去 -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
<!-- 指定要自动扫描接口的基础包,实现接口 -->
<property name="basePackage" value="com.fengxiaobin.mapper"></property>
</bean>
<!-- 5.声明式事务管理 -->
<!--定义事物管理器,由spring管理事务 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--6.配置事务 (任选其一) -->
<!--(1)事务的实现方式 1 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="add*" propagation="REQUIRED" />
<tx:method name="update*" propagation="REQUIRED" />
<tx:method name="del*" propagation="REQUIRED" />
<tx:method name="*" propagation="REQUIRED" read-only="true" />
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="serviceMethod" expression="execution(* com..service..*.*(..))" />
<aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice" />
</aop:config>
<!--(2)事务的实现方式 2 配置基于注解的声明式事务 -->
<!-- <tx:annotation-driven transaction-manager="transactionManager"/> -->
<!--7. aspectj支持自动代理实现AOP功能 -->
<!-- <aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy> -->
</beans>
这个主要为通过SpringMVC的前端控制器DispatcherServlet来分发从前端接收的请求(更多解释后续补充)。
<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop" 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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 1.(扫描web相关的bean)配置扫描的基本包 -->
<context:component-scan base-package="com.fengxiaobin.controller"></context:component-scan>
<!-- 2.(开启SpringMVC注解模式)anno启动注解驱动 (静态资源处理)当springmvc处理不了时,用tomcat处理 -->
<mvc:annotation-driven />
<!-- 3.(静态资源默认servlet配置 )默认的servlet处理器tomcat 当遇到DispatcherServlet处理不了静态资源时由tomcat处理 -->
<mvc:default-servlet-handler />
<!-- 4.(配置jsp 显示ViewResolver)配置视图解析器 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/"></property>
<!--较为安全写法
<property name="prefix" value="/WEB-INF/views/"></property> -->
<property name="suffix" value=".jsp"></property>
</bean>
<!-- 文件上传 -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize">
<value>999999999999999</value>
</property>
</bean>
</beans>
Mybatis是对象关系映射(orm)的实现,用来操作数据库,可将对象封装的数据转化成关系型数据库所需要的格式来存储数据。
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<plugins>
<!-- com.github.pagehelper为PageHelper类所在包名(要是使用pageHelp分页插件的话可以在这里配置下) -->
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<!-- 什么都不配,使用默认的配置 -->
</plugin>
</plugins>
</configuration>
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance " xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<display-name>TEST-SSM</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!-- 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>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*
org.springframework.web.context.ContextLoaderListener
contextConfigLocation
classpath:applicationContext.xml
SpringMVC
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
classpath:springMVC.xml
1
true
SpringMVC
/
log4j.rootLogger=DEBUG, Console
#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG
至此配置已完成 接下来测试
再添加一张工程结构免得你们翻上去看
此页面来让用户输入数据
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!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">
<%-- <link href="${pageContext.request.contextPath}">--%>
<title>Insert title here</title>
<script type="text/javascript">
function query(){
var input_id=document.getElementById("id").value;
alert(input_id);
location.href="selById?id="+input_id;
}
</script>
</head>
<body>
<!-- <p>部门id<input id="input_id" type="text"/></p>
<p><input type="button" value="获取" onclick="query()"/></p></br> -->
<form action="dept/selById" method="post" enctype="multipart/form-data">
<p>部门id<input id="id" name="id" type="text"/></p>
<p><input type="submit" value="获取" /></p>
</form><br/>
<p><input type="submit" value="获取2" onclick="query()"/></p>
<p>部门id:<input type="text" name="did" value="${dept.id}"></p>
<p>部门名称:<input type="text" name="dname" value="${dept.name}"></p>
</body>
</html>
/**
*
*/
package com.fengxiaobin.pojo;
/**
* @author fxb
* @version **
* ����ʱ�䣺2019��12��13������9:47:19
* ��������
*/
public class Dept {
private int id;
private String name;
/**
* @param id
* @param name
*/
public Dept(int id, String name) {
super();
this.id = id;
this.name = name;
}
/**
*
*/
public Dept() {
super();
// TODO Auto-generated constructor stub
}
/**
* @return the id
*/
public int getId() {
return id;
}
/**
* @param id the id to set
*/
public void setId(int id) {
this.id = id;
}
/**
* @return the name
*/
public String getName() {
return name;
}
/**
* @param name the name to set
*/
public void setName(String name) {
this.name = name;
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "Dept [id=" + id + ", name=" + name + "]";
}
}
注解解释:
@Controller 使Spring容器将此Bean标记为Controller并注入Spring容器,由Spring容器来管理此bean
@RequestMapping("/dept") 请求地址映射注解项目工程名后加/dept可以找到此bean
@Autowired将注入容器的bean拉取到此bean中(可大致看成DeptService s=new DeptService();
)
/**
*
*/
package com.fengxiaobin.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import com.fengxiaobin.pojo.Dept;
import com.fengxiaobin.service.DeptService;
/**
* @author fxb
* @version ** ����ʱ�䣺2019��12��13������10:50:01
* ��������
*/
@Controller
@RequestMapping("/dept")
public class DeptController {
@Autowired
private DeptService s;
@RequestMapping("/selById")
// @RequestParam("name") String name
public String selById(Dept d, Model model) {
Dept dept = s.selById(d.getId());
model.addAttribute("dept", dept);
return "index";
}
}
注解解释:
@Service 将此bean标记为service bean并纳入spring容器,交给spring容器管理
/**
*
*/
package com.fengxiaobin.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.fengxiaobin.mapper.DeptMapper;
import com.fengxiaobin.pojo.Dept;
/**
* @author fxb
* @version **
* ����ʱ�䣺2019��12��13������10:52:39
* ��������
*/
@Service
public class DeptService {
@Autowired
private DeptMapper m;
public Dept selById(int id) {
return m.selById(id);
}
}
(1)DeptMapper 接口
package com.fengxiaobin.mapper;
import com.fengxiaobin.pojo.Dept;
/**
* @author fxb
* @version **
* ����ʱ�䣺2019��12��13������9:52:46
* ��������
*/
public interface DeptMapper {
public Dept selById(int id);
}
(2)DeptMapper.xml 编写sql语句
resultType:返回的结果类型
parameterType:参数类型
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.fengxiaobin.mapper.DeptMapper">
<select id="selById" resultType="Dept" parameterType="int">
select * from dept where id=#{id}
</select>
</mapper>
结束,运行测试
右击index,jsp运行
部门id输入2,点击获取或者获取2得到部门id和部门名称
测试结果如下
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