自学笔记--Maven项目的Spring+SpringMVC+MyBatis整合(亲测可用)
对于一个初学者来说,在整合SSM(Spring+SpringMVC+MyBatis)框架时可能会出现各种问题,博主在经过数次的踩坑之后,总算将三大框架整合到了一起,下面就通过实现对数据库表的查询功能来看看是怎么整合的吧
首先我们来看一下在项目中的所需要的配置文件
mapper.xml—>MyBatis框架映射器映射文件
spring.xml—>spring框架的配置文件
springmvc.xml—>springmvc框架的配置文件
conf.xml—>MyBatis框架的全局配置文件
db.properties—>属性文件
pom.xml—>Maven项目的配置文件
web.xml—>web项目的配置文件在Maven项目中,配置文件统一存放于src/main/resources路径下
>>.mapper.xml中配置的内容
该文件负责将java对象与数据库表产生映射关系,如果采用动态代理方式的话,将该文件与接口放在一起,具体的配置如下:
<mapper namespace="com.qhit.dao.EmployeeDao">
<resultMap type="employeepojos" id="pojosresult">
<id property="id" column="id" />
<result property="name" column="name" />
<result property="sex" column="sex" javaType="String" jdbcType="INTEGER" />
<result property="age" column="age" />
<result property="address" column="address" />
<result property="salary" column="salary" />
resultMap>
<select id="selectAll" resultMap="pojosresult">
select * from employee
select>
mapper>dao层(数据访问层)对应的内容
public interface EmployeeDao {
// 查询全部数据
List selectAll();
}
>>.conf.xml中配置的内容
该文件是MyBatis的全局配置文件,具体的配置信息如下:
<configuration>
<typeAliases>
<package name="com.qhit.pojos" />
typeAliases>
<typeHandlers>
<typeHandler handler="com.qhit.converter.SexConverter"
jdbcType="INTEGER" javaType="String" />
typeHandlers>
configuration>>>.pom.xml文件中配置的内容
简单来说.该文件是Maven用来管理项目中jar包的配置文件,具体配置如下:
jar包配置信息的话就不贴了,小伙伴们可以根据以下jar包名称到maven仓库查找相应的jar包配置信息,如下所示:
重点来看一下在pom.xml文件中的这条配置信息,可以防止配置文件加载不到的情况,具体配置信息如下:
<build>
<finalName>mybatisfinalName>
<resources>
<resource>
<directory>src/main/javadirectory>
resource>
<resource>
<directory>src/main/resourcesdirectory>
resource>
resources>
build>>>.web.xml文件中配置的内容
<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>springDispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:springmvc.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>springDispatcherServletservlet-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>
<servlet-name>springDispatcherServletservlet-name>
filter-mapping>>>.db.properties文件中配置的内容
driver=oracle.jdbc.driver.OracleDriver
url=jdbc:oracle:thin:@localhost:1521:orcl
name=数据库登录名
pass=数据库登录密码>>.spring.xml文件中配置的内容
<context:property-placeholder location="classpath:db.properties" />
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
p:driverClass="${driver}" p:jdbcUrl="${url}" p:user="${name}"
p:password="${pass}" p:maxIdleTime="1000" p:maxPoolSize="30"
p:minPoolSize="5" p:autoCommitOnClose="false">bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"
p:dataSource-ref="dataSource" p:mapperLocations="classpath:com/qhit/dao/employeeMapper.xml"
p:configLocation="classpath:conf.xml">bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"
p:basePackage="com.qhit.dao" p:sqlSessionFactoryBeanName="sqlSessionFactory">bean>
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource">bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<context:component-scan base-package="com.qhit.service.impl,com.qhit.controller" />>>.springmvc.xml文件中配置的内容
<mvc:annotation-driven />
<mvc:default-servlet-handler />
<context:component-scan base-package="com.qhit.service.impl,com.qhit.controller" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver" />
service层(服务层)测试代码
@Service
public class EmployeeServiceImpl implements EmployeeService {
@Autowired
private EmployeeDao dao;
/*
* @author Virus
*
* @description 查询全部员工信息
*/
@Override
public List selectAll() {
// TODO Auto-generated method stub
return this.dao.selectAll();
}
} controller层(控制层)测试代码
@Controller
@RequestMapping("/employee")
public class EmployeeController {
@Autowired
private EmployeeServiceImpl service;
private ModelAndView ms;
// 获取全部信息
@RequestMapping("/all")
public ModelAndView allInfo() {
System.out.println("进来了......");
ms = new ModelAndView();
ms.addObject("allEmployee", this.service.selectAll());
ms.setViewName("forward:/index.jsp");
return ms;
}
}JSP页面测试代码
- getinfo.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title heretitle>
head>
<body>
<jsp:forward page="employee/all" />
body>
html>- index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title heretitle>
<style type="text/css">
th {
text-align: center;
}
style>
head>
<body>
<table border="1">
<tr>
<th>编号th>
<th>姓名th>
<th>性别th>
<th>年龄th>
<th>家庭住址th>
<th>薪资th>
tr>
<c:forEach items="${allEmployee}" var="all">
<tr>
<th>${all.id }th>
<th>${all.name }th>
<th>${all.sex }th>
<th>${all.age }th>
<th>${all.address }th>
<th>${all.salary }th>
tr>
c:forEach>
table>
body>
html>- 查询结果
Ending……
本文还存在有很多不足之处,希望小伙伴们可以多多指教 ^_^
革命尚未成功,同志仍需努力啊!!!