啊哈,终于到了用Maven整合SSM这个扑街含家产了。弄了整整一天才跑通。Mybatis的配置有些繁琐,跟之前学习的那个有点出去,加上Eclipse的Spring工具没有弄,配置的时候没有提示被搞蒙圈了。不过万幸,最终还是凭借我高超的只会完成了!!哈哈哈
项目源码地址 走过路过的朋友帮忙点歌star☆ ^_^
Eclipse+Maven+jdk+Tomcat,安装不多说了。
File->New->MavenProject->maven-archetype-webapp
Group Id: com.bigname Artifacrt Id: MavenDemo01
创建自己喜欢的目录结构,体现架构思想
在pom.xml声明依赖,利用该网站查找配置写法(http://mvnrepository.com/)
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"> <!-- 开启注解 --> <mvc:annotation-driven /> <!-- 让扫描spring扫描这个包下所有的类,让标注spring注解的类生效 --> <context:component-scan base-package="com.bigname.demo03.controller"></context:component-scan> <!-- 视图解析器 --> <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
<!-- 定义前端控制器 --> <servlet> <servlet-name>spring-mvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 指定路径 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <!-- 随spring启动而启动 --> <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。
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
<!-- 配置适配器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
需要依赖jar包
a.在pom.xml中添加依赖声明
<!-- c3p0 数据库连接池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!-- 数据库 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>6.0.6</version> </dependency>
b.在spring-context.xml配置c3p0
<!-- 配置c3p0 --> <!-- 连接池 --> <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>
需要依赖jar包
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
<!-- 配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 使用注解来控制事务 --> <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>
这里共依赖四个jar包
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> <!-- 分页助手 --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.1.2</version> </dependency> <!-- 代理 --> <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"/> <!-- 代理 --> <setting name="proxyFactory" value="CGLIB"/> <setting name="lazyLoadingEnabled" value="true"/> </settings> <!-- 分页插件 --> <plugins> <plugin interceptor="com.github.pagehelper.PageInterceptor"> <!-- 该参数默认为false 设置为true时,会将RowBounds第一个参数offset当成pageNum页码使用 和startPage中的pageNum效果一样 --> <property name="offsetAsPageNum" value="true"/> <!-- 该参数默认为false 设置为true是,使用RowBounds分页会进行count查询 --> <property name="rowBoundsWithCount" value="true"/> <!-- 设置为true时,如果pageSize=0或者ROwRounds.limit=0就会查询出全部的结果 (相当于每一偶执行分页查询,但是返回结果仍然是page类型) --> <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
<!-- 配置mybatis, 绑定c3p0--> <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> <!-- 扫描生成所有dao层 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.bigname.demo03.dao"></property> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean>
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。还有一些细节问题可能会一楼记录下来,但有事找度娘总能解决de~
到此为止,搭建Maven+Spring+SpringMVC+Mybatis的项目已经搭建完成,虽然很简陋,出现过很多问题,但总算是成功了,可以安心睡个小觉觉 。
坚持不懈,学海无涯。