一个简单的ssm项目
准备说明
jdk、tomcat、idea、mave配置请看我前两篇，这里说下mysql以及我的mysql图像化工具
数据库
项目概览
项目构建
--------搭建一个简单的mave的web项目，构建步骤如下--------
http://www.cnblogs.com/flyins/p/7617078.html
--------配置文件--------
该项目需要以来的jar和plugins如下，也就是pom.xml。maven下载完成后，你可以点击Maven Projects中看到
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.dsh</groupId> <artifactId>Demo</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>Demo Maven Webapp</name> <url>http://maven.apache.org</url> <!-- 统一管理版本号 --> <properties> <junit.version>4.12</junit.version> <spring.version>4.1.3.RELEASE</spring.version> <mybatis.version>3.2.8</mybatis.version> <mybatis.spring.version>1.2.2</mybatis.spring.version> <mybatis.paginator.version>1.2.15</mybatis.paginator.version> <mysql.version>5.1.32</mysql.version> <slf4j.version>1.6.4</slf4j.version> <jackson.version>2.4.2</jackson.version> <druid.version>1.0.9</druid.version> <httpclient.version>4.3.5</httpclient.version> <jstl.version>1.2</jstl.version> <servlet-api.version>2.5</servlet-api.version> <jsp-api.version>2.0</jsp-api.version> <joda-time.version>2.5</joda-time.version> <commons-lang3.version>3.3.2</commons-lang3.version> <commons-io.version>1.3.2</commons-io.version> <commons-net.version>3.3</commons-net.version> <pagehelper.version>3.4.2-fix</pagehelper.version> <jsqlparser.version>0.9.1</jsqlparser.version> <commons-fileupload.version>1.3.1</commons-fileupload.version> <jedis.version>2.7.2</jedis.version> <solrj.version>4.10.3</solrj.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <!-- Jackson Json处理工具包(springmvc的注解@ResponseBody需要此包) --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jackson.version}</version> </dependency> <!-- 单元测试 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> <!-- 日志处理 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency> <!-- Mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis.spring.version}</version> </dependency> <dependency> <groupId>com.github.miemiedev</groupId> <artifactId>mybatis-paginator</artifactId> <version>${mybatis.paginator.version}</version> </dependency> <!-- MySql --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <!-- 连接池 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <!-- Spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <!-- JSP相关 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>${jstl.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>${servlet-api.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jsp-api</artifactId> <version>${jsp-api.version}</version> <scope>provided</scope> </dependency> </dependencies> <build> <finalName>Demo</finalName> <!-- maven所需依赖。 --> <plugins> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <configuration> <verbose>true</verbose> <overwrite>true</overwrite> </configuration> </plugin> </plugins> <!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 --> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> </build> </project>
resources下，粘贴下如下配置文件
spring配置文件applicationContext.xml。主要是用于ioc式创建对象和aop式管理事务。
这里主要是用到了提供数据源对象
<?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:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"> <!-- 1. 数据源 : DriverManagerDataSource --> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/test" /> <property name="username" value="root" /> <property name="password" value="root" /> </bean> <!-- 2. mybatis的SqlSession的工厂: SqlSessionFactoryBean dataSource:引用数据源 MyBatis定义数据源,同意加载配置 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="configLocation" value="classpath:mybatis-config.xml" /> </bean> <!-- 3. mybatis自动扫描加载Sql映射文件/接口 : MapperScannerConfigurer sqlSessionFactory basePackage:指定sql映射文件/接口所在的包（自动扫描） --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.isd.dao"></property> <property name="sqlSessionFactory" ref="sqlSessionFactory"></property> </bean> <!-- 4. 事务管理 : DataSourceTransactionManager dataSource:引用上面定义的数据源 --> <!-- <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> --> <!-- 5. 使用声明式事务 transaction-manager：引用上面定义的事务管理器--> <!-- <tx:annotation-driven transaction-manager="txManager" /> --> </beans>
mybatis配置文件mybatis-config.xml
仅仅只有几行配置，因为项目中使用的 sping和mybatis 实现的，那么其他的配置是否就由spring完成了
仔细想一下就知道结果了，使用spring当然会用到的就是spring配置数据源datasource了。那么mybatis-config.xml内容减少那也是正常了。
<?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="lazyLoadingEnabled" value="true"/> <setting name="multipleResultSetsEnabled" value="true"/> <setting name="useColumnLabel" value="true"/> <setting name="useGeneratedKeys" value="true"/> <setting name="defaultExecutorType" value="SIMPLE"/> <setting name="defaultStatementTimeout" value="25000"/> <setting name="logImpl" value="STDOUT_LOGGING" /> </settings> <!-- 实体类,简称 -设置别名 --> <typeAliases> <typeAlias alias="Student" type="com.isd.model.Student" /> </typeAliases> <!-- 实体接口映射资源 --> <!-- 说明：如果xxMapper.xml配置文件放在和xxMapper.java统一目录下，mappers也可以省略，因为org.mybatis.spring.mapper.MapperFactoryBean默认会去查找与xxMapper.java相同目录和名称的xxMapper.xml --> <mappers> </mappers> </configuration>
Log4j,配置文件log4j.properties
通过使用Log4j，我们可以控制日志信息输送的目的地是控制台、文件、GUI组件、甚至是套接口服务器、NT的事件记录器、UNIX Syslog守护进程等
# Direct log messages to console log4j.appender.console=org.apache.log4j.ConsoleAppender log4j.appender.console.Target=System.out log4j.appender.console.layout=org.apache.log4j.PatternLayout log4j.appender.console.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n # Root logger option log4j.rootLogger=debug,console
配置web.xml，springmvc的配置文件dispatcher-servlet.xml
dispatcher-servlet.xml
<?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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="com.isd"/> <!-- 静态资源的访问 --> <mvc:resources mapping="/**/*.html" location="/"/> <mvc:resources mapping="/**/*.js" location="/"/> <!--<mvc:resources mapping="/css/**" location="/css/"/>--> <!--<mvc:resources mapping="/images/**" location="/images/"/>--> <!--<mvc:resources mapping="/static/**" location="/static/"/>--> <!-- 开启注解 --> <mvc:annotation-driven/> <!--ViewResolver 视图解析器--> <!--用于支持Servlet、JSP视图解析--> <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> </beans>
web.xml
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> </welcome-file-list> </web-app>
---------使用mybatis.generator逆向工程生成model和dao层--------
配置文件generatorConfig.xml
注意的是：先新建一个在src下java目录，然后转成sources类型，不然不会被编译，方法参考http://www.cnblogs.com/flyins/p/7617835.html
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <classPathEntry location="C:\Users\Administrator\.m2\repository\mysql\mysql-connector-java\5.1.32\mysql-connector-java-5.1.32.jar" /> <context id="testTables" targetRuntime="MyBatis3"> <commentGenerator> <!-- 是否去除自动生成的注释 true：是 ： false:否 --> <property name="suppressAllComments" value="false" /> </commentGenerator> <!--数据库连接的信息：驱动类、连接地址、用户名、密码 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/test" userId="root" password="root"> </jdbcConnection> <!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL 和 NUMERIC 类型解析为java.math.BigDecimal --> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- targetProject:生成PO类的位置 --> <javaModelGenerator targetPackage="com.isd.model" targetProject="C:\Users\Administrator\IdeaProjects\Demo\src\main\java"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> <!-- 从数据库返回的值被清理前后的空格 --> <property name="trimStrings" value="false" /> </javaModelGenerator> <!-- targetProject:mapper映射文件生成的位置 --> <sqlMapGenerator targetPackage="com.isd.dao" targetProject="C:\Users\Administrator\IdeaProjects\Demo\src\main\java"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <!-- targetPackage：mapper接口生成的位置 --> <javaClientGenerator type="XMLMAPPER" targetPackage="com.isd.dao" targetProject="C:\Users\Administrator\IdeaProjects\Demo\src\main\java"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> </javaClientGenerator> <!-- 指定数据库表 --> <table tableName="student" ></table> </context> </generatorConfiguration>
---------给项目配置服务器--------
idea要求若给项目添加tomcat，则必须先配置好默认的tomcat，然后点击+号才有tomcat选项，所以先配置全局default的tomcat
然后再给项目配置tomcat服务器
------------------------------------------------------------------------------以上，准备工作结束，项目搭建完毕，准备自己coding吧----------------------------------------------------------------------------------------------
我要点击按钮，获取所有的student。
Dao层
那么我需要在mapper的xml和java文件中新增此方法：
StudentMapper.xml
<select id="selectAllSudent" resultMap="BaseResultMap" > select <include refid="Base_Column_List" /> from student </select>
StudentMapper.java
List<Student> selectAllSudent();
service层
接口StudentService
package com.isd.service; import com.isd.model.Student; import java.util.List; public interface StudentService { List<Student> getAllStudent(); }
实现StudentServiceImp
package com.isd.service.imp; import com.isd.dao.StudentMapper; import com.isd.model.Student; import com.isd.service.StudentService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class StudentServiceImp implements StudentService { @Autowired private StudentMapper studentDao; public List<Student> getAllStudent() { return studentDao.selectAllSudent(); } }
conttroller层
StudentController
package com.isd.controller; import com.isd.model.Student; import com.isd.service.StudentService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; @Controller @RequestMapping("student") public class StudentController { @Autowired private StudentService studentService; @RequestMapping("getAllStudent") @ResponseBody public Map<String,Object> getAllStudent(){ List<Student> allStudent=studentService.getAllStudent(); Map<String,Object> result=new HashMap<String,Object>(); result.put("status","sucess"); result.put("data",allStudent); return result; } }
web
index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h1>测试系统已经启动！！！</h1> <button>获取所有学生</button> <script src="./js/jquery-3.2.1.min.js"></script> <script> var myhost='http://localhost:8080/Demo/'; var getAllStudent=myhost+'student/getAllStudent'; $('button').click(function () { $.post(getAllStudent,function (rep) { console.log(rep) }) }) </script> </body> </html>
效果
总的大概来说呢
spring就是用来提供对象的，利用其ioc/di与aop贯穿于整个项目。为各个层之间提供对象创建和注入，解耦合。
比如我的这个项目提供了dao层的对象。不过service、controller都有，只不过是用来注解，在默认配置文件applicationContext.xml中感觉不出来而已
springMVC是负责controller和jsp的，也就是视图层的，其默认配置文件是dispatcher-servlet.xml
mybatis是负责数据库的连接（不用jdbc了），与spring整合后，配合spring可提供dao层对象
项目地址
https://gitee.com/dingshao/Demo.git
