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Spring+SpringMVC+Mybatis框架整合

2020-07-06 09:42 82 查看

前言：最近想记录一下SSM框架的搭建，巩固一下自己所学的东西，毕竟只有多用，多写才能更熟练。

整个项目结构

现在从头开始搭建。

开发环境：

eclipse：（现在好多人都用Idea了，我也用了一下，还不错，不过这次搭建还是用eclipse，因为习惯了 ，哈哈）

数据库（Mysql）：版本：8.0.20 （本人安装的是linux下安装的数据库）

1、创建Maven项目

File-->New-->Maven Project

到这里项目已经创建成功。看一下此时的项目结构

这算是一个比较标准的结构了。这里创建出来pom.xml有报错。

解决办法：鼠标选中项目--->右键-->Java EE Tools -->Generate Deployment Descriptor Stub 此时错误消失了。

2、添加依赖。

由于用的Maven 所以我们需要将需要的jar包依赖坐标写入pom.xml保存就会自动下载相关jar包了。

附上代码：pom.xml

<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.eshop</groupId>
  <artifactId>eshop</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  
  <properties>
      <!-- spring版本号 -->
      <spring.version>4.0.2.RELEASE</spring.version>
      <!-- mybatis版本号 -->
    <mybatis.version>3.2.6</mybatis.version>
    <!-- log4j日志文件管理包版本 -->
    <slf4j.version>1.7.7</slf4j.version>
    <log4j.version>1.2.17</log4j.version>
  </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <!-- 导入java ee jar包（可以去除index.jsp报错） -->
    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-api</artifactId>
        <version>7.0</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.11</version>
        <!-- 表示开发的时候引入，发布的时候不会加载此包 -->
        <scope>test</scope>
    </dependency>
    <!-- spring核心包 -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</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-oxm</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-jdbc</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-aop</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <!-- mybatis核心包 -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>${mybatis.version}</version>
    </dependency>
    <!-- mybatis/spring包 -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.2.2</version>
    </dependency>
    <!-- 导入Mysql数据库链接jar包 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.11</version>
    </dependency>
    <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 -->
    <dependency>
        <groupId>commons-dbcp</groupId>
        <artifactId>commons-dbcp</artifactId>
        <version>1.2.2</version>
    </dependency>
    <!-- JSTL标签类 -->
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
    <!-- 日志文件管理包 -->
    <!-- log start -->
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>${log4j.version}</version>
    </dependency>
    <!-- 格式化对象，方便输出日志 -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.1.41</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>${slf4j.version}</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>${slf4j.version}</version>
    </dependency>
    <!-- log end -->
    <!-- 映入JSON -->
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>1.9.13</version>
    </dependency>
    <!-- 上传组件包 -->
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.3.1</version>
    </dependency>
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.4</version>
    </dependency>
    <dependency>
        <groupId>commons-codec</groupId>
        <artifactId>commons-codec</artifactId>
        <version>1.9</version>
    </dependency>
    <!-- 自动生成 -->
    <dependency>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-core</artifactId>
        <version>1.3.6</version>
    </dependency>
    <dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>5.2.4.Final</version>
   </dependency>
    
  </dependencies>
  <build>
    <finalName>Reds-01</finalName>
    <plugins>
     <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.5.1</version>
        <configuration>
            <source>1.8</source>
            <target>1.8</target>
            <encoding>UTF-8</encoding>
        </configuration>
     </plugin>
  </plugins>
  </build>
  
</project>

3、下面需要在src/main/resources下添加配置文件

1）连接数据库文件jdbc.properties

     jdbc.driver=com.mysql.cj.jdbc.Driver
     jdbc.url=jdbc:mysql://192.168.152.128:3306/ssm?characterEncoding=UTF-8&serverTimezone=UTC&useSSL=false
     jdbc.username=zhang
     jdbc.password=123456

注意：这块要提一个我遇到的坑，由于我安装的数据库是8版本的，所以驱动依赖也要8.几版本的，这就导致了驱动连接不能用以前的，写法否则会无法连接报错。

老版本的写法：

driverClassName=com.mysql.jdbc.Driver

url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&useSSL=false

6.0以上版本写法、需要指定时区

driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?serverTimezone=Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=false
2）日志文件log4j.properties

log4j.rootCategory=DEBUG, stdout , R
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n
log4j.appender.R=org.apache.log4j.DailyRollingFileAppender
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%n

3）整合Spring.(applicationContext.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:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" 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-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 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <!-- 1读取jdbc.properties -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    
    <!-- 2.配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <!-- 数据库驱动 -->
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    
    <!-- 3.事务管理器，依赖于数据源 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    
    <!-- 4.开启事务注解 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>
    
    <!-- 5.配置MyBatis工厂 SqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 指定Mybatis核心配置文件位置 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    
    <!-- 6.配置mapper扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.eshop.dao"/>
    </bean>
    
    <!-- 7.扫描Service -->
    <context:component-scan base-package="com.eshop.service"/>
</beans>

 4）整合SpringMVC(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:p="http://www.springframework.org/schema/p"
    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-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">
    <!--1. 配置包扫描器，扫描@Controller注解的类 -->
    <context:component-scan base-package="com.eshop.controller"/>
    
    <!--2. 开启mvc注解 -->
    <mvc:annotation-driven/>
    
    <!--3. 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

 5）整合Mybatis (mybatis-config.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>
    <!-- 别名定义 -->
    <typeAliases>
        <package name="com.eshop.po"/>
    </typeAliases>
</configuration>

6）配置web.xml

<?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_3_0.xsd"
    version="3.0">
  <display-name>eshop</display-name>
    <welcome-file-list>
      <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <!-- 1.配置加载Spring文件的监听器 -->
    <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>
    
    <!-- 2.编码过滤器 -->
    <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>
    
    <!-- 3.配置SpringMVC前端核心控制器 -->
    <servlet>
        <servlet-name>springmvc</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>
        
        <!-- 4.服务器启动后立即加载SpringMVC配置文件 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

 7）在WEB-INF下面新建jsp文件夹并创建query.jsp页面

query.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@page import="com.eshop.po.Employee"%>
<%@page import="java.util.List"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户信息查询</title>
<style type="text/css">
     table{
          background-color:yellow;
          border:1px solid gray;
          align:center;
          margin:auto;
         }
     th,td{  width:200px;
             text-align:center;
             font-size:10px;
             color:black;'}
</style>
</head>
     <table  border="1">
     <tr>
            <td>编号</td>
            <td>姓名</td>
            <td>年龄</td>
        </tr> 
  <%
  //循环显示数据
   List<Employee> emplist=(List)request.getAttribute("emp"); 
   if(emplist.size()!=0){
     for(int i=0;i<emplist.size();i++){
         Employee em =new Employee(); 
         em = emplist.get(i);
  %>
  
<tr>
     <td><%=emplist.get(i).getEid() %></td>
     <td><%=emplist.get(i).getEname() %></td>
     <td><%=emplist.get(i).getAge()%></td>
  </tr>
  <%
     }
   }
%>
  </table>
</html>

到这里整个框架整合完成。下一步，开始测试

4、新建实体类，编写业务逻辑测试

1)com.eshop.po

  Employee.java

package com.eshop.po;
/*
 * -用户实体类
 */
public class Employee {
    private int eid;
    private String ename;
    private int age;
    public int getEid() {
        return eid;
    }
    public void setEid(int eid) {
        this.eid = eid;
    }
    public String getEname() {
        return ename;
    }
    public void setEname(String ename) {
        this.ename = ename;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    @Override
    public String toString() {
        return "employee [eid=" + eid + ", ename=" + ename + ", age=" + age + "]";
    }
    
}

 2)com.eshop.dao

  Employee.dao

package com.eshop.dao;

import java.util.ArrayList;

import com.eshop.po.Employee;

public interface EmployeeDao {
    /*
     * -查询所有用户
     */
    public ArrayList<Employee> getList();
}

Employee.xml 

<?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.eshop.dao.EmployeeDao">
    <select id="getList" parameterType="employee" resultType="Employee">
        select * from employee 
    </select>
</mapper>

3)com.eshop.service 

EmployeeService.java

package com.eshop.service;

import java.util.ArrayList;

import com.eshop.po.Employee;

public interface EmployeeService {
    /*
     * -查询所有用户
     */
    public ArrayList<Employee> getList();
}

com.eshop.service.impl 

EmployeeServiceImpl.java

package com.eshop.service.impl;

import java.util.ArrayList;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.eshop.dao.EmployeeDao;
import com.eshop.po.Employee;
import com.eshop.service.EmployeeService;
@Service
@Transactional //开启事务
public class EmployeeServiceImpl implements EmployeeService{
    @Autowired
    private EmployeeDao empDao;
    public ArrayList<Employee> getList() {
        // TODO Auto-generated method stub
        ArrayList<Employee> ar=new ArrayList<Employee>();
        ar.addAll(this.empDao.getList());
        return ar;
    }

}

4)com.eshop.controller 

EmployeeController.java

package com.eshop.controller;

import java.util.ArrayList;

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.eshop.po.Employee;
import com.eshop.service.EmployeeService;

    @Controller
    @RequestMapping("/")
    public class EmployeeController {
        
        @Autowired
        private EmployeeService empService;
        
        @RequestMapping("/query")
        public String getList( Model model) {
            ArrayList<Employee> emp = empService.getList();
            model.addAttribute("emp", emp);
            return "query";
        }
    }

 打开浏览器输入地址

http://localhost:8080/eshop/query/

界面显示

到这里整个框架就算整合完成了

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