SSM+Maven 整合三（适合刚入门的rookie）

一：环境
Eclipse+Maven+jdk+Tomcat，安装不多说了。

二：Eclipse新建Maven项目
File->New->MavenProject->maven-archetype-webapp

Group Id: com.bigname
Artifacrt Id: MavenDemo01

三：构建目录结构
创建自己喜欢的目录结构，体现架构思想

四：添加依赖
在pom.xml声明依赖,利用该网站查找配置写法(http://mvnrepository.com/)

1：依赖SpringMVC
a.声明依赖，此时jar包会自动下载

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.14.RELEASE</version>
</dependency>

b.创建配置文件：
在resource下创建spring-mvc.xml,内容如下

<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">


<mvc:annotation-driven />


<context:component-scan base-package="com.bigname.demo03.controller"></context:component-scan>


<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/views/" />
<property name="suffix" value=".jsp"></property>
</bean>
</beans>

c.在web.xml中添加配置

<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>

<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

这个时候可以新建一个controller来检验一下请求是否能走通，成功了再执行下一步。

2：依赖spring
由于在依赖springmvc的时候已经添加了许多spring相关包了，所以此时不需要添加额外的包，可以直接创建配置文件了。

a.创建配置文件spring-context.xml
内容啥的暂时不用写

<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation=
"
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
"
>

</beans>

b.在web.xml中配置spring

<listener>
<description>启动spring容器</description>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-context.xml</param-value>
</context-param>

此时spring已经配置完成

3.依赖c3p0
需要依赖jar包

c3p0
jdbc-mysql
a.在pom.xml中添加依赖声明

<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>


<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>

b.在spring-context.xml配置c3p0

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost/test?characterEncoding=utf8&serverTimezone=UTC"></property>
<property name="user" value="root"></property>
<property name="password" value="root"></property>
<property name="minPoolSize" value="1"></property>
<property name="maxPoolSize" value="5"></property>
<property name="initialPoolSize" value="1"></property>
<property name="acquireIncrement" value="1"></property>
</bean>

4.配置spring声明式事务管理
需要依赖jar包

spring-tx
spring-jdbc
a.在pom.xml中生命依赖

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.14.RELEASE</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.14.RELEASE</version>
</dependency>

b.在spring-context.xml配置
如果tx这些爆红，则需要检查该文件头部信息是否完整。可以往上翻查看spring-context.xml

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>


<tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>

5:依赖Mybatis
这里共依赖四个jar包

mybatis、
mybatis-spring整合
pagehelper分页、
cglib代理
a.在pom.xml中添加依赖声明

<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.1</version>
</dependency>

<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>


<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.1.2</version>
</dependency>


<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.2.2</version>
</dependency>

b.新建mybatis配置文件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>

<settings>
<setting name="cacheEnabled" value="true"/>
<setting name="defaultStatementTimeout" value="3000"/>
<setting name="mapUnderscoreToCamelCase" value="true"/>

<setting name="proxyFactory" value="CGLIB"/>
<setting name="lazyLoadingEnabled" value="true"/>
</settings>


<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">

<property name="offsetAsPageNum" value="true"/>

<property name="rowBoundsWithCount" value="true"/>

<property name="pageSizeZero" value="true"/>
</plugin>
</plugins>

</configuration>

这次曾出现一个问题，在程序运行的时候检验不通过，因为之前按照教程的写法是：

<plugin interceptor="com.github.pagehelper.PageHelper">
<property name="dialect" value="mysql"/>

然后报了类型转换的异常，最后查网上的资料改成现在的样子就成功了。

c.在spring-context.xml中配置mybatis
这里要绑定数据源、指明配置文件位置、mapper位置、扫描dao层

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<property name="mapperLocations">
<list>
<value>classpath:mapper/*.xml</value>
</list>
</property>
</bean>


<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.bigname.demo03.dao"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>

至此maven已经成功整合了spring+springmvc+mybatis,接下来整合测试一遍

1.创建数据库test、表格Member

id name password
1 梁世杰 123
2 刘德华 456
3 周润发 789
4 shijie 123

2.core层创建实体类
要与数据库字段对应

package com.bigname.demo03.core;

public class Member {
private int id;
private String name;
private String password;
public Member(){}
public Member(int id, String name, String password) {
super();
this.id = id;
this.name = name;
this.password = password;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return "Member [id=" + id + ", name=" + name + ", password=" + password
+ "]";
}

}

3.dao层创建数据访问类
a.创建接口

public interface MemberDao {
Member selectMemberByName(@Param("name")String name)throws Exception;
}

b.创建MemberDaoMapper.xml
这里出现过一个问题，当传入中文时发生过异常，应为其中的#号之前携程$符号了，另外a中需要增加@Param的注解来说明是属性的意思

<?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.bigname.demo03.dao.MemberDao">
<select id="selectMemberByName" resultType="com.bigname.demo03.core.Member" parameterType="string">
select * from Member where name = #{name}
</select>
</mapper>

然后只要得到MemberDao的对象就能够访问数据库啦

4.function创建业务类
a.创建Member业务接口

package com.bigname.demo03.function;

@Service
public interface IMemberFunction {
Member login(String name, String passsword) throws Exception;
}

b.创建Member业务接口实现类

package com.bigname.demo03.function;

@Service
public class MemberFunctionImpl implements IMemberFunction{
@Autowired
MemberDao mDao;

public Member login(String name, String passsword) throws Exception {
System.out.println(name + passsword);
if(StringUtil.isNullOrZero(name)){
System.out.println("用戶名不能為空");
return null;
}
if(StringUtil.isNullOrZero(passsword)){
System.out.println("密碼不能為空");
return null;
}
Member member = mDao.selectMemberByName(name);
return member;
}

}

5.创建LoginController,定义接口

package com.bigname.demo03.controller;
@Controller
public class LoginController {
@Autowired
IMemberFunction iMemberFunc;

@RequestMapping(value = "/hello")
public String hello(){
System.out.println("接收到请求，Hello");
return "hi";
}

@RequestMapping(value = "/login")
public String login(String name, String password){
try {
Member member = iMemberFunc.login(name, password);
if(member == null){
System.out.println("登陆失败");
}else {
System.out.println("登陆成功");
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println(e.getMessage());
System.out.println("登录失败");
}
return null;
}
}

在配置springmvc的时候如果成功了，那么hello.do这个接口就能正常使用的了。

访问：
http://localhost:8201/MavenDemo03/login.do?name=shijie&password=145
如果没问题的话就是成功啦。

另外：spring要扫描function层，springmvc扫描controller层，mybatis扫描dao层，需要被扫描的类要增加组件注解，例如@Controller。声明本文有参考其他文章

SSM+Maven 整合 三（适合刚入门的rookie）

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