【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>