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项目的演示效果：
开发的工具及环境：
- IntelliJ IDEA: 2016
- Maven :3.0x
- Hbuilder(前端部分，可以用记事本代替2333)
- Java 8
项目流程（dao->service->web）：
1.添加所有依赖：
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!--补全项目依赖-->
<!--1.日志 java日志有:slf4j,log4j,logback,common-logging
slf4j:是规范/接口
日志实现:log4j,logback,common-logging
使用:slf4j+logback
-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.12</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.1.1</version>
</dependency>
<!--实现slf4j接口并整合-->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.1</version>
</dependency>
<!--1.数据库相关依赖-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.1</version>
</dependency>
<!--2.dao框架:MyBatis依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.3.0</version>
</dependency>
<!--mybatis自身实现的spring整合依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.3</version>
</dependency>
<!--3.Servlet web相关依赖-->
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.5.4</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<!--4:spring依赖-->
<!--1)spring核心依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<!--2)spring dao层依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<!--3)springweb相关依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<!--4)spring test相关依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<!--添加redis依赖-->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.7.3</version>
</dependency>
<!--prostuff序列化依赖-->
<dependency>
<groupId>com.dyuproject.protostuff</groupId>
<artifactId>protostuff-core</artifactId>
<version>1.0.8</version>
</dependency>
<dependency>
<groupId>com.dyuproject.protostuff</groupId>
<artifactId>protostuff-runtime</artifactId>
<version>1.0.8</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
</div>
2.添加Mybatis的配置文件：
<?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>
<!--配置全局属性-->
<settings>
<!--使用jdbc的getGeneratekeys获取自增主键值-->
<setting name="useGeneratedKeys" value="true"/>
<!--使用列别名替换列名 默认值为true
select name as title(实体中的属性名是title) form table;
开启后mybatis会自动帮我们把表中name的值赋到对应实体的title属性中
-->
<setting name="useColumnLabel" value="true"/>
<!--开启驼峰命名转换Table:create_time到 Entity(createTime)-->
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
</configuration>
</div>
这里最好去官网看最新配置文件的头配置http://www.mybatis.org/mybatis-3/zh/index.html
然后编写dao层的代码：
相册实体类
public interface PictureDao {
/**
* @return 返回所有图片
*/
List<Picture> getAllPictures();
/**上传图片，并且将图片名，图片描述信息插入数据库
* @param picName
* @param content
* @return插入成功返回1，失败0
*/
int InsertPicture(@Param("picName") String picName, @Param("content") String content);
}
</div>
用户实体类
public interface UserDao {
/**如果查询到该用户就会返回1
* @param username,p