spring-sprinMVC-mybatis集成（普通javaWeb项目）

1、集成思路

使用idea新建普通的javaWeb项目
导入jar包
配置spring的核心配置文件：引入jdbc.properties 配置dataSource
配置SqlSessionFactory domain、dao（mapper）service 事物tx controller
springMvc核心配置文件：扫描包静态资源放行开启注解支持配置视图解析器
web.xml配置：启动spring容器启动springMvc容器解决post提交乱码问题
jsp完成

2.导入jar包

在这里插入图片描述

3.1 配置spring的核心配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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
    ">

    <!--加载jdbc.properties文件-->
    <!--
            system-properties-mode="NEVER"
            设置这个是为了如果jdbc.properties没有写前缀，那么系统会默认用户名
    -->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!-- 扫描service层-->
    <context:component-scan base-package="cn.itsource.ssm.service"/>

    <!--配置连接池对象-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
    </bean>


    <!--创建SessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 去加载所有的mapper.xml文件-->
        <property name="mapperLocations" value="classpath:cn/itsource/ssm/mapper/*.xml"/>
        <!--定义公共的基础包-->
        <property name="typeAliasesPackage">
            <value>
                cn.itsource.ssm.query
                cn.itsource.ssm.domain
            </value>
        </property>
    </bean>

   <!-- dao配置完毕  方式1-->
    <!--方式1：如果有很多个mapper，需要每个都配置。比较麻烦，使用另一种方式-->
    <bean id="employeeMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
        <property name="mapperInterface" value="cn.itsource.ssm.mapper.EmployeeMapper"/>
    </bean>



    <!--方式2-->
    <!--mapper扫描器的配置-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--只要扫描到该包下所有的接口，我都使用代理模式进行实现-->
        <property name="basePackage" value="cn.itsource.ssm.mapper"/>
    </bean>

    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 开启事务注解的支持-->
    <tx:annotation-driven/>

</beans>

3.2 jdbc.properties

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost/ssm
jdbc.username=root
jdbc.password=123456

3.3 log4j.properties

###全局 配置根
##log4j常见的日志等级： trace<debug<info<warn<error
log4j.rootLogger = ERROR,console 
##输出局部的日志信息    打印的日志等级要大于或者等于trace等级
log4j.logger.cn.itsource=trace
##打印的日志规则    日志信息打印在控制台里面
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
##你打印的日志是有一定格式的
log4j.appender.console.layout = org.apache.log4j.PatternLayout
##讲解详细布局规则
log4j.appender.console.layout.ConversionPattern=%d %p [%c] - %m%n

3.4 domain

package cn.itsource.ssm.domain;

public class Employee {
    private Long id;
    private String name;
    private Integer age;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Employee{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

3.5 dao(mapper)

package cn.itsource.ssm.mapper;

import cn.itsource.ssm.domain.Employee;

import java.util.List;

public interface EmployeeMapper {

    void save(Employee employee);

    List<Employee> selectAll();
}

3.6 service

package cn.itsource.ssm.service;

import cn.itsource.ssm.domain.Employee;

import java.util.List;

public interface IEmployeeService {
    void save(Employee employee);

    void update(Employee employee);

    void delete(Long id);

    Employee selectById(Long id);

    List<Employee> selectAll();
}

3.7 servicImpl

package cn.itsource.ssm.service.impl;

import cn.itsource.ssm.domain.Employee;
import cn.itsource.ssm.mapper.EmployeeMapper;
import cn.itsource.ssm.service.IEmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Transactional(readOnly = true,propagation = Propagation.SUPPORTS)
public class EmployeeServiceImpl implements IEmployeeService {
    @Autowired
    private EmployeeMapper employeeMapper;
    @Override
    @Transactional
    public void save(Employee employee) {
        employeeMapper.save(employee);
        System.out.println(1/0);
    }

    @Override
    @Transactional
    public void update(Employee employee) {

    }

    @Override
    @Transactional
    public void delete(Long id) {

    }

    @Override
    public Employee selectById(Long id) {
        return null;
    }

    @Override
    public List<Employee> selectAll() {
        return employeeMapper.selectAll();
    }
}

3.8 controller

package cn.itsource.ssm.web.controller;

import cn.itsource.ssm.service.IEmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private IEmployeeService employeeService;

    @RequestMapping("/index")
    public String index(Model model) {
        model.addAttribute("emps", employeeService.selectAll());
        return "employee/employee";
    }
}

4.applicationContext-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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
    ">


    <!-- 扫描service层-->
    <context:component-scan base-package="cn.itsource.ssm.web.controller"/>

    <mvc:annotation-driven/>

    <mvc:default-servlet-handler/>

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


</beans>

5.web.xml

<?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_4_0.xsd"
         version="4.0">

    <!--在指定的位置加装applicationContext.xml文件-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        <!--启动springMvc容器-->
        <servlet-name>springMvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springMvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <filter>
        <!--解决post提交乱码问题-->
        <filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


</web-app>