maven web项目中整合ssm框架（连接Mysql数据库）

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> 

<display-name>study</display-name>

    <!-- 加载Spring容器配置 -->
   <!--  监听器无法为spring框架设置其需要处理的请求格式 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- 设置Spring容器加载配置文件路径 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    
    <!-- 配置DispatchcerServlet -->
    <!-- 注册spring mvc ，就需要为其设置处理的请求格式  就需要使用另外一个类代替监听器 -->
    <servlet>
        <servlet-name>springDispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 配置Spring mvc下的配置文件的位置和名称 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        
       <!--  1)load-on-startup元素标记容器是否在启动的时候就加载这个servlet(实例化并调用其init()方法)。
        2)它的值必须是一个整数，表示servlet应该被载入的顺序
        2)当值为0或者大于0时，表示容器在应用启动时就加载并初始化这个servlet；
        3)当值小于0或者没有指定时，则表示容器在该servlet被选择时才会去加载。
        4)正数的值越小，该servlet的优先级越高，应用启动时就越先加载。
        5)当值相同时，容器就会自己选择顺序来加载。
        <load-on-startup>x</load-on-startup>，中x的取值1，2，3，4，5代表的是优先级，而非启动延迟时间。 -->
        
        <load-on-startup>1</load-on-startup>
    </servlet>
    
   <!--  注册的同时为这个框架设置其需要处理的请求格式 -->
    <servlet-mapping>
        <servlet-name>springDispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
        <!-- 中文编码支持配置 -->
    <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.jsp</welcome-file>
    </welcome-file-list>

</web-app>

<?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:p="http://www.springframework.org/schema/p"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!-- 引入db.properties属性文件 -->
    <context:property-placeholder location="classpath:db.properties"/>
    <!--  引入多个以properties结尾的配置文件 -->
    <!-- <context:property-placeholder location="classpath:*.properties"/> -->

    <!-- 扫描除了 controller 之外的bean -->
    <context:component-scan base-package="com.su.study.*">
        <context:exclude-filter type="annotation"
                                expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <!-- 数据源的配置 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
        init-method="init" destroy-method="close"
        p:driverClassName="${jdbc.driver}"
        p:url="${jdbc.url}"
        p:maxActive="${ds.maxActive}"
        p:username="${jdbc.username}"
        p:password="${jdbc.password}"
        p:initialSize="${ds.initialSize}"/>
    
    <!--===================== mybatis ========================-->    
    <!-- SqlSessionFactory(mybatis) -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"
        p:mapperLocations="classpath:com/su/study/mapping/*.xml"
        p:dataSource-ref="dataSource"/>

    <!-- 配置mybatis 的扫描器扫描接口 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"
         p:basePackage="com.su.study.dao"
         p:sqlSessionFactoryBeanName="sqlSessionFactory"/>

    <!-- ===============事务相关===================-->
    <!-- 事务管理器-->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <!-- 开启事务的注解模式 -->
    <tx:annotation-driven transaction-manager="txManager" />  
    
</beans>

#mysql数据库连接
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=su@123
ds.initialSize=5
ds.maxActive=30

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 使用注解的包，包括子集,只扫描 controller注解 -->
    <context:component-scan base-package="com.su.study.controller"
                            use-default-filters="false">
        <context:include-filter type="annotation"
                                expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
    
    <!-- 该标签可以扩展其中的一些东西，比如：responseBody的返回值编码转换。可以不 配置任何东西，但是是需要的，为了使@Controller这样的注解生效 -->
    <mvc:annotation-driven/>
    
</beans>  

<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.su</groupId>
    <artifactId>study</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>study Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <properties>
        <spring.version>4.3.2.RELEASE</spring.version>
        <mybatis.version>3.4.1</mybatis.version>
        <mybatis-spring.version>1.3.0</mybatis-spring.version>
        <druid.version>1.0.27</druid.version>
        <mybatis-generator-core.version>1.3.2</mybatis-generator-core.version>
        <servlet-api.version>2.5</servlet-api.version>
        <jackson.version>2.8.5</jackson.version>
        <slf4j.version>1.7.7</slf4j.version>
        <fastjson.version>1.2.31</fastjson.version>
    </properties>

    <dependencies>
        <!-- spring核心包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- spring扩展包,在基础IoC功能上的扩展服务 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
         <!-- spring web开发应用包,提供controller层的核心封装 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <!-- spring mvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <!-- spring对JDBC数据访问的封装 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <!-- mybatis 包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>

        <!-- mybatis与spring整合包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis-spring.version}</version>
        </dependency>
        
         <!-- mybatis-generator自动生成工具 -->
         <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>${mybatis-generator-core.version}</version>
        </dependency>
        
        <!-- mybatis 使用 durid 数据源 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>

        <!-- mysql JDBC驱动 -->
         <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.37</version>
        </dependency>
        
        <!-- JSON和Java对象转换-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        
        <!-- servlet jar包,包含HttpServletRequest -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>${servlet-api.version}</version>
            <scope>provided</scope>
        </dependency>
        
        <!-- 日志打印 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        
        <!-- fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>${fastjson.version}</version>
        </dependency>
    </dependencies>

    <build>
        <finalName>study</finalName>
        <plugins>
            <!-- Config: Maven Tomcat Plugin -->
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
            </plugin>
        </plugins>
        
        <resources>
            <!-- 打包 mybatis 的XXXMapper.xml文件-->
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <!-- 打包 配置文件-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
            </resource>
        </resources>

    </build>

</project>

<?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>
    <!--导入配置文件-->
    <properties resource="mybatis/generator.properties"></properties>

    <classPathEntry location="${jdbc.driverLocation}"/><!-- 绝对路径 -->
    <context id="testTables" targetRuntime="MyBatis3">
        <commentGenerator>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
        <jdbcConnection driverClass="${jdbc.driverClass}"
                        connectionURL="${jdbc.connectionURL}"
                        userId="${jdbc.user}"
                        password="${jdbc.password}">
        </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>

        <!-- Model模型生成器,用来生成含有主键key的类，记录类 以及查询Example类
           targetPackage     指定生成的model生成所在的包名
           targetProject     指定在该项目下所在的路径
       -->
        <javaModelGenerator targetPackage="${target.model.path}"
                            targetProject="${target.project.path}">
            <!-- enableSubPackages:在targetPackage的基础上，根据数据库的schema再生成一层package，最终生成的类放在这个package下，默认为false -->
            <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="true" />
        </javaModelGenerator>
        
        <!-- targetProject:mapper映射文件生成的位置(xml) -->
        <sqlMapGenerator targetPackage="${target.mapping.path}"
                         targetProject="${target.project.path}">
            <!-- 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(dao 层的 xxxMapper) -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="${target.dao.path}"
                             targetProject="${target.project.path}">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>
        
        <!-- 指定数据库表 ,可以有多个table标签
            schema即为数据库名 tableName为对应的数据库表
            domainObjectName是要生成的实体类
            enable*ByExample是否生成 example类  ,false表示不生成 -->
        <table schema="${jdbc.user}" tableName="${database.table.name}"
            domainObjectName="${table.model.name}" enableCountByExample="false"
            enableDeleteByExample="false" enableSelectByExample="false"
            enableUpdateByExample="false">
        </table>
        
    </context>
</generatorConfiguration>

#==================mysql 驱动及用户密码设置===============
jdbc.driverLocation=C:/Users/wifi/.m2/repository/mysql/mysql-connector-java/5.1.37/mysql-connector-java-5.1.37.jar
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.connectionURL=jdbc:mysql://localhost:3306/test
jdbc.user=root
jdbc.password=su@123

#==================生成的文件的路径设置====================
#生成的 model文件路径
target.model.path=com.su.study.model
#生成的 mapper接口路径
target.dao.path=com.su.study.dao
#生成xml文件路径
target.mapping.path=com.su.study.mapping
#生成文件的包所在的路径
target.project.path=src/main/java
#对应的数据库表名
database.table.name=user
#要生成的实体类名
table.model.name=User

package mybatis;

import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.exception.InvalidConfigurationException;
import org.mybatis.generator.exception.XMLParserException;
import org.mybatis.generator.internal.DefaultShellCallback;

public class MybatisGeneratorMain {

    public static void main(String[] args) {

        System.out.println("开始。。。。。");
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        String genCfg = "../mybatis/generatorConfig.xml";
        File configFile = new File(MybatisGeneratorMain.class.getResource(genCfg).getFile());
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = null;
        try {
            config = cp.parseConfiguration(configFile);
            System.out.println("进行中1。。。。");
        } catch (IOException e) {
            e.printStackTrace();
        } catch (XMLParserException e) {
            e.printStackTrace();
        }
        System.out.println("进行中2。。。。。");
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = null;
        try {
            myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
            System.out.println("结束、、、、、、");
        } catch (InvalidConfigurationException e) {
            e.printStackTrace();
        }
        try {
            myBatisGenerator.generate(null);
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }

}

package com.su.study.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.alibaba.fastjson.JSON;
import com.su.study.dao.UserMapper;
import com.su.study.model.User;

@Controller
@RequestMapping("/user")
public class UserController {

    /**
     * 用户表相关
     */
    @Autowired
    private UserMapper userMapper;

    /**
     * 查询
     */
    @RequestMapping(value = "/select", method=RequestMethod.POST, produces="application/json;charset=UTF-8")
    @ResponseBody
    public User test( @RequestBody(required=true) User user) {
        System.out.println("入参:" + JSON.toJSONString(user));
        User u =  userMapper.selectByPrimaryKey(user.getId());
        System.out.println("查询结果 :" + JSON.toJSONString(u));
        return u;
    }

}