一分钟整合SSM框架,四分钟梳理框架脉络
速成整合SSM框架
集成项目框架
springmvc,spring是web层的框架,mybatis是应用层和数据库之间的联系
- 从pom.xml中导入依赖(spring)(完整的pom.xml在文章最后)
spring-webmvc
spring-jdbc
spring-aop
spring-aspects
mybatis
mybatis-spring
mysql-connector-java
c3p0
jstl
javax.servlet-api
lombok
commons-dbcp
web.xml
- web.xml中主要包含的是对spring框架和springmvc框架的初始化
web.xml中文件的头变化
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
web-app>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring.xmlparam-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<servlet>
<servlet-name>DispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:springmvc.xmlparam-value>
init-param>
servlet>
<servlet-mapping>
<servlet-name>DispatcherServletservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<filter>
<filter-name>characterEncodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>UTF-8param-value>
init-param>
filter>
<filter-mapping>
<filter-name>characterEncodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<servlet-mapping>
<servlet-name>defaultservlet-name>
<url-pattern>*.jsurl-pattern>
servlet-mapping>
<servlet-mapping>
<servlet-name>defaultservlet-name>
<url-pattern>*.cssurl-pattern>
servlet-mapping>
<servlet-mapping>
<servlet-name>defaultservlet-name>
<url-pattern>*.jpgurl-pattern>
servlet-mapping>
Spring.xml
- Spring.xml中的头文件
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
beans>
- 使用c3p0连接池配置spring的数据源
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="root">property>
<property name="password" value="123456">property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/book?serverTimezone=CST&useSSL=false">property>
<property name="driverClass" value="com.mysql.cj.jdbc.Driver">property>
<property name="initialPoolSize" value="5">property>
<property name="maxPoolSize" value="10">property>
bean>
- 使用mybatis中的spring框架来进行识别
读取mapper.xml配置文件,并读取mybatis的配置文件
<bean id="SqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource">property>
<property name="mapperLocations" value="classpath:com/gao/repository/*.xml">property>
<property name="configLocation" value="classpath:config.xml">property>
bean>
- 扫描自定义的mapper接口：spring中管理mybatis配置管理mybatis
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.gao.repository">property>
bean>
mybatis.xml
头文件：
DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!--设置mybatis中的日志信息的输出-->
<settings>
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<!--在文件中实现对实体类对象的创建-->
<typeAliases>
<package name="com.gao.enity"/>
</typeAliases>
</configuration>
springmvc.xml
- 头文件
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
beans>
- 主要内容
<mvc:annotation-driven>mvc:annotation-driven>
<context:component-scan base-package="com.gao">context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/">property>
<property name="suffix" value=".jsp">property>
bean>
至此SSM配置文件完毕:
接下来我们创建enity层,Dao层,Service层,Controller层的文件:
文件目录如下:
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book.java
package com.gao.enity;
import lombok.Data;
@Data
public class Book {
int bid;
int cateid;
String bname;
String author;
}
实体类创建完毕.
在com.gao.reposity中创建dao层的接口和mapper.xml文件
BookRepository.java
package com.gao.repository;
import com.gao.enity.Book;
import java.util.List;
public interface BookRepository {
public List<Book> findAll();
}
BookRepository.xml文件
DOCTYPE mapper PUBLIC "-//mybatis.org//DTDMapper3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.gao.repository.BookRepository">
<select id="findAll" resultType="Book">
select * from book
select>
mapper>
Dao层创建完毕.
创建service层中的配置
Bookservice.java
package com.gao.service;
import com.gao.enity.Book;
import java.util.List;
public interface BookService {
public List<Book> findAll();
}
BookServiceImpl.java
package com.gao.service.Impl;
import com.gao.enity.Book;
import com.gao.repository.BookRepository;
import com.gao.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class BookServiceImpl implements BookService {
@Autowired
private BookRepository bookRepository;
public List<Book> findAll() {
return bookRepository.findAll();
}
}
Controller层
UserController
package com.gao.controller;
import com.gao.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/book")
public class UserController {
@Autowired
private BookService bookService;
@GetMapping("/findAll")
public ModelAndView index(){
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("index");
modelAndView.addObject("list",bookService.findAll());
return modelAndView;
}
}
controller层完毕
整合过程中遇到的错误：
别名设置错误问题:
解决方案:
引起别名问题的就是在设置Mybatis的配置文件中的配置别名一项出现了问题
我们再来到mybatis.xml配置文件,发现别名配置错误.
由于系统时区差异引起的错误
serverTimezone=CST
Pom.xml
<dependencies>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>5.0.11.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>5.0.11.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aopartifactId>
<version>5.0.11.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aspectsartifactId>
<version>5.0.11.RELEASEversion>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.4.5version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>1.3.1version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.22version>
dependency>
<dependency>
<groupId>com.mchangegroupId>
<artifactId>c3p0artifactId>
<version>0.9.5.3version>
dependency>
<dependency>
<groupId>jstlgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<version>1.18.22version>
dependency>
<dependency>
<groupId>commons-dbcpgroupId>
<artifactId>commons-dbcpartifactId>
<version>1.4version>
dependency>
dependencies>
groupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<version>1.18.22version>
dependency>
<dependency>
<groupId>commons-dbcpgroupId>
<artifactId>commons-dbcpartifactId>
<version>1.4version>
dependency>
dependencies>
该项目的git源码地址:https://gitee.com/hzir/quickSSM
在此项目的基础上又新增了分页插件的使用,但是基本的SSM框架并没有改变