内容简介:【Java】ssm整合配置实例
本文主要是介绍SSM整合基本配置实例,利用一个简单的例子来说明如何整合SSM
首先下载SSM整合的相关jar包,下载链接如下:
http://download.csdn.net/download/qi_ming88/10223988
1.建立web工程,工程结构图如下:
配置web.xml,在web.xml中主要配置spring,以及springMVC配置:
<?xml version="1.0" encoding="UTF-8"?>
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<!--Spring配置 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <!-- Bootstraps the root web application context before servlet initialization --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!--SpringMVC配置,启动约定在web.xml同级目录创建spring-servlet.xml --> <!-- The front controller of this Spring Web application, responsible for handling all application requests --> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <!-- Map all requests to the DispatcherServlet for handling --> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
在web.xml统计目录建立 springMVC配置spring-servlet.xml:
<?xml version="1.0" encoding="UTF-8"?>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd 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-4.3.xsd"> <!--SpringMVC只是控制网站跳转逻辑 --> <context:component-scan base-package="com.qiming.mybatis"> <!--只扫描springMVC部分的控制器 --> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"></property> <property name="suffix" value=".jsp"></property> </bean> <mvc:annotation-driven></mvc:annotation-driven> <mvc:default-servlet-handler/>
在源文件夹conf下建立spring配置文件applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring" xsi:schemaLocation="http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd 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-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd"> <!--Spring希望管理所有的业务逻辑组件等 --> <context:component-scan base-package="com.qiming.mybatis"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!--引入数据库的配置文件 --> <context:property-placeholder location="classpath:dbconfig.properties"/> <!-- Spring用来控制业务逻辑。数据源。aop --> <!--配置数据源 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}"></property> <property name="jdbcUrl" value="${jdbc.url}"></property> <property name="user" value="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> </bean> <!--spring事务管理 --> <bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" > <property name="dataSource" ref="dataSource"></property> </bean> <!--开启基于注解的事务管理器 --> <tx:annotation-driven transaction-manager="dataSourceTransactionManager"/> <!--整合mybatis 目的:1.spring管理所有组件,mapper的实现类 service==》Dao @Autowired:自动注入mapper 2.spring用来管理事务,spring声明式事务 --> <!--创建SqlSessionFactory对象 --> <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"> </property> <!--configLocation指定全局文件配置 --> <property name="configLocation" value="classpath:mybatis-config.xml"></property> <!--mapperLocations:指定mapper文件的位置 --> <property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"></property> </bean> <!-- 扫描所有的mapper接口的实现,让这些mapper能够自动注入 base-package:指定mapper接口的包名 --> <mybatis-spring:scan base-package="com.qiming.mybatis.dao"/> <!-- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.qiming.mybatis.dao"></property> </bean> -->
再源文件conf配置mybatis配置文件,在mybatis中主要输配置settings组件的属性,其他的基本都是在spring配置中完成,只是利用mybatis对数据库操作:
<?xml version="1.0" encoding="UTF-8" ?>
br>PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<settings> <!-- <setting name="mapUnderscoreToCamelCase" value="true" /> --> <!--显示的指定每一个我们需要更改的配置的值,即使他是默认的,防止版本更新带来的错误 --> <setting name="cacheEnabled" value="true"/> <setting name="lazyLoadingEnabled" value="true"/> <setting name="aggressiveLazyLoading" value="false"/> </settings> <databaseIdProvider type="DB_VENDOR"> </databaseIdProvider>
以上就是对三种框架的基本配置,spring主要处理业务逻辑,事务等,springMVC主要是对网站页面逻辑的控制,mybatis是对数据操作持久化层的操作。
通过controller类对页面响应,并且通过调用service(service调用持久化成dao的mybatis配置mapper接口,操作数据库)
Controller注解类:
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.qiming.mybatis.beans.Employee;
import com.qiming.mybatis.service.EmployeeService;
@Controller
public class EmployeeController {
@Autowired EmployeeService employeeService; @RequestMapping("emps") public String emps(Map<String, Object> map) { List<Employee> emps = employeeService.getEmps(); System.out.println(emps); map.put("allEmps", emps); return "list"; }
}
Service注解类
import java.util.List;
import org.apache.ibatis.session.SqlSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.qiming.mybatis.beans.Employee;
import com.qiming.mybatis.dao.EmployeeMapper;
@Service
public class EmployeeService {
@Autowired private EmployeeMapper employeeMapper;
/* @Autowired
private SqlSession sqlSession;*/ public List<Employee> getEmps(){ // //EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class); return employeeMapper.getEmps(); }
}
mybatis映射接口Mapper:
import java.util.List;
import java.util.Map;
import org.apache.ibatis.annotations.MapKey;
import org.apache.ibatis.annotations.Param;
import com.qiming.mybatis.beans.Employee;
public interface EmployeeMapper {
public Employee getEmpById(Integer id); public List<Employee> getEmps(); }
javabean类:
package com.qiming.mybatis.beans;
import java.io.Serializable;
import org.apache.ibatis.type.Alias;
@Alias("emp")
public class Employee implements Serializable{
/** * */ private static final long serialVersionUID = 1L; private Integer id; private String lastName; private String gender; private String email; private Department dept; public Employee(Integer id, String lastName, String gender, String email, Department dept) { super(); this.id = id; this.lastName = lastName; this.gender = gender; this.email = email; this.dept = dept; } public Department getDept() { return dept; } public void setDept(Department dept) { this.dept = dept; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getLastName() { return lastName; } @Override public String toString() { return "Employee [id=" + id + ", lastName=" + lastName + ", gender=" + gender + ", email=" + email + "]"; } public Employee(Integer id, String lastName, String gender, String email) { super(); this.id = id; this.lastName = lastName; this.gender = gender; this.email = email; } public void setLastName(String lastName) { this.lastName = lastName; } public String getGender() { return gender; } public void setGender(String gender) { this.gender = gender; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public Employee() { super(); // TODO Auto-generated constructor stub }
}
mybatis SQL配置文件:
<?xml version="1.0" encoding="UTF-8" ?>
br> PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!-- public Employee getEmpById(Integer id); --> <select id="getEmpById" resultType="com.qiming.mybatis.beans.Employee"> select * from tbl_employee where id=#{id} </select> <!--public List<Employee> getEmps(); --> <select id="getEmps" resultType="com.qiming.mybatis.beans.Employee"> select id,last_name lastName,email,gender from tbl_employee </select>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持 码农网
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