JavaWeb框架-SSM-普通Web项目整合流程！

话说：

各位读者盆友，上午好！之前一系列框架介绍，还是少了这篇普通Web项目整合流程，后面再来一篇Maven项目SSM的整合。不过，有了这个基础，Maven就不是事啦。

SSM——Spring + SpringMVC + Mybatis

是现在的主流框架。他们是独立的个体，SpringMVC和Spring是关系很紧密的，其他都是独立的个体。它们个性鲜明，各有特点，所以整合起来，非常好用。各自功能是：一切都基本交给Spring统一管理,主要做什么呢？连接数据库、实例化bean（IOC）、AOP（各种通知）；SpringMVC相当于我们的Servlet（核心本来也就是Servlet），主要负责调用方法，页面跳转;Mybatis呢？就是把我们原来在DaoImpl中写的SQL语句放到了配置中写，最大的优点是：动态sql、ORM(一对多、多对一)很方便的。

目录

1.整体架构

2.配置文件

3.后端流程代码

4.总结

难度系数：★☆☆☆☆

建议用时：1H

1.整体架构







每个包的作用，都应该了然于胸。

4 核心包core bean context express

2 日志包 log4j common-logging

com.springsource.org.apache.log4j-1.2.15.jar

com.springsource.org.apache.commons.logging-1.1.1.jar

1 aop包

3 aspect

外部包（aop联盟）com.springsource.org.aopalliance-1.0.0.jar

aspectJ com.springsource.org.aspectj.tools-1.6.6.RELEASE.jar

1 test 包 注解读取applicationConfig.xml文件，仅用于测试

1 web 绑定applicationContext ServletContext 结为兄弟，同生死

1 jdbc 搭载数据库

1 c3p0 连接池

1 jdbc

1 tx 事务包 （用到JdbcTemplate.update等方法，需要这个包）

2.配置文件

config

applicationConfig.xml

springmvc.xml

SqlMapConfig.xml

log4j.properties

如果不是Maven项目，要记得导入头部：



applicationConfig.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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd"> 
<!--连接数据库交给Spring管理  -->
<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/db_spring01"></property>
<property name="user" value="root"></property>
<property name="password" value="119913"></property>
</bean>

<!-- 把SqlSessinoFactory交由Spring管理 -->
<bean name="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 注入连接池 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 注入SqlMapConfig.xml -->
<property name="configLocation" value="classpath:config/SqlMapConfig.xml"></property>
<!-- 索性把 sqlmap也交由Spring管理，避免间接通过SqlMapConfig.xml去映射 -->
<property name="mapperLocations" value="classpath:sqlmap/*.xml"></property>

</bean>

<!-- Mapper动态代理，也给Spring管理 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.hmc.dao"></property>
<!-- <property name="sqlSessionFactorybean" value="sqlSessionFactory"></property> -->
</bean>

<context:component-scan base-package="com.hmc"></context:component-scan>

</beans>

springmvc.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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd"> 
<!-- 扫描注解-->
<context:component-scan base-package="com.hmc"></context:component-scan>

<!-- 注解驱动  搞定处理器映射器、处理器适配器 -->
<mvc:annotation-driven/>

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

</beans>

SqlMapConfig.xml

<?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>

<!-- Mybatis连接数据库，和Spring整合后，取消 -->
<!-- <environments default="development">
<environment id="development">
<transactionManager type="jdbc"></transactionManager>
<dataSource type="pooled">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql:///db_spring01"/>
<property name="user" value="root"/>
<property name="password" value="119913"/>
</dataSource>
</environment>
</environments> -->
</configuration>

log4j.properties

# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

sqlmap

<?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.hmc.dao.BookDao">
<insert id="addBook"  parameterType="com.hmc.pojo.Book" >
insert into book (bookName,bookAuthor,bookTime) values (#{bookName},#{bookAuthor},now());
</insert>

</mapper>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">

<!--配置字符过滤器  -->
<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>

<!--把Spring的applicationContext和ServletContext绑定，同生死
用Spring自带监听器，配置初始化ApplicationContext对象，放在ServletCotnext作用域中   -->
<!-- <listener class="org.springframework.web.context.ContextLoaderListener"></listener> -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:config/applicationConfig.xml</param-value>
</context-param>

<!-- 配置Spring MVC 核心  前端控制器-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:config/springmvc.xml</param-value>
</init-param>
</servlet>

<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

<!--  -->

</web-app>

3.后端流程代码

BookController

BookDao

Book

BookService

BookServiceImpl

BookController

package com.hmc.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.hmc.pojo.Book;
import com.hmc.service.BookService;

/**
*
*2018年1月12日
*User:Meice
*下午5:04:17
*/
@Controller
public class BookController {
@Autowired
private BookService bookService;

@RequestMapping("addBook")
public String addBook() {
Book book = new Book();
book.setBookName("《撒哈拉的故事》");
bookService.addBook(book);
return "index";
}

}

BookDao

package com.hmc.dao;
import java.util.List;
import com.hmc.pojo.Book;
/**
*
*2018年1月12日
*User:Meice
*下午3:52:59
*/
public interface BookDao {
//增删改查  查单个、多个对象
void addBook(Book book);
void delBook(int bookId);
void updateBook(Book book);

Book listOneBook(int bookId);
List<Book> listBooks();
}

Book

package com.hmc.pojo;
/**
*
*2018年1月12日
*User:Meice
*下午3:45:31
*/

import java.util.Date;

public class Book {
private int bookId;
private String bookName;
private String bookAuthor;
private Date bookTime;
public Book() {}
public Book(int bookId, String bookName, String bookAuthor, Date bookTime) {
super();
this.bookId = bookId;
this.bookName = bookName;
this.bookAuthor = bookAuthor;
this.bookTime = bookTime;
}
public int getBookId() {
return bookId;
}
public void setBookId(int bookId) {
this.bookId = bookId;
}
public String getBookName() {
return bookName;
}
public void setBookName(String bookName) {
this.bookName = bookName;
}
public String getBookAuthor() {
return bookAuthor;
}
public void setBookAuthor(String bookAuthor) {
this.bookAuthor = bookAuthor;
}
public Date getBookTime() {
return bookTime;
}
public void setBookTime(Date bookTime) {
this.bookTime = bookTime;
}
@Override
public String toString() {
return "Book [bookId=" + bookId + ", bookName=" + bookName + ", bookAuthor=" + bookAuthor + ", bookTime="
+ bookTime + "]";
}

}

BookService

package com.hmc.service;
import java.util.List;
import com.hmc.pojo.Book;

/**
*
*2018年1月12日
*User:Meice
*下午4:54:06
*/
public interface BookService {
//增删改查  查单个、多个对象
void addBook(Book book);
void delBook(int bookId);
void updateBook(Book book);

Book listOneBook(int bookId);
List<Book> listBooks();
}

BookServiceImpl

package com.hmc.service
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import com.hmc.dao.BookDao;
import com.hmc.pojo.Book;

/**
*
*2018年1月12日
*User:Meice
*下午4:54:34
*/
@Service
public class BookServiceImpl  implements BookService{

@Autowired
@Qualifier("bookDao")
private BookDao bookDao;

@Override
public void addBook(Book book) {

bookDao.addBook(book);

}

@Override
public void delBook(int bookId) {
// TODO Auto-generated method stub

}

@Override
public void updateBook(Book book) {
// TODO Auto-generated method stub

}

@Override
public Book listOneBook(int bookId) {
// TODO Auto-generated method stub
return null;
}

@Override
public List<Book> listBooks() {
// TODO Auto-generated method stub
return null;
}

}

4.总结

这篇博客就是简单走通普通Web项目用手动jar包方式搭建的SSM环境，如果用Maven，jar包就更加方便管理啦。后面还会用具体的小项目，顺便介绍Maven搭建的环境。

Mybatis可以连接数据库，不过这里我们也直接交给了Spring，所以它的作用就完全是mapper.xml啦，它最大的优势，据我感受，就是映射接口、动态SQL、和一对一、一对多的映射方式，很是方便。SpringMVC就完全可以在一个Controller里面写所有方法，而不用像BBS那样，那么多的Servlet。所以，一步步回头看来，框架之所以方便，确实是进化多年的结果，用起来好用，出了问题，还是比较妖精的。

好了！我们下期再会！