mybatis-spring整合

1. 配置jar包

Spring,mybatis,mybatis-spring,mysql等。。。

<properties>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

<!-- spring版本号 -->

<spring.version>4.2.5.RELEASE</spring.version>

<!-- mybatis版本号 -->

<mybatis.version>3.2.8</mybatis.version>

<!-- mysql驱动版本号 -->

<mysql-driver.version>5.1.29</mysql-driver.version>

<!-- log4j日志包版本号 -->

<slf4j.version>1.7.18</slf4j.version>

<log4j.version>1.2.17</log4j.version>

</properties>

<dependencies>

<!-- 数据库连接池包 -->

<dependency>

<groupId>com.mchange</groupId>

<artifactId>c3p0</artifactId>

<version>0.9.5-pre8</version>

</dependency>

<!-- 添加jstl依赖 -->

<dependency>

<groupId>jstl</groupId>

<artifactId>jstl</artifactId>

<version>1.2</version>

</dependency>

<dependency>

<groupId>javax</groupId>

<artifactId>javaee-api</artifactId>

<version>7.0</version>

</dependency>

<!-- 添加junit4依赖 -->

<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>4.11</version>

<!-- 指定范围，在测试时才会加载 -->

<scope>test</scope>

</dependency>

<!-- 添加spring核心依赖 -->

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-core</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-oxm</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-tx</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-webmvc</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context-support</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-aop</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-test</artifactId>

<version>${spring.version}</version>

</dependency>

<!-- 添加mybatis依赖 -->

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis</artifactId>

<version>${mybatis.version}</version>

</dependency>

<!-- 添加mybatis/spring整合包依赖 -->

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis-spring</artifactId>

<version>1.2.2</version>

</dependency>

<!-- 添加mysql驱动依赖 -->

<dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

<version>${mysql-driver.version}</version>

</dependency>

<!-- 添加数据库连接池依赖 -->

<dependency>

<groupId>commons-dbcp</groupId>

<artifactId>commons-dbcp</artifactId>

<version>1.2.2</version>

</dependency>

<!-- 添加fastjson -->

<dependency>

<groupId>com.alibaba</groupId>

<artifactId>fastjson</artifactId>

<version>1.1.41</version>

</dependency>

<!-- 添加日志相关jar包 -->

<dependency>

<groupId>log4j</groupId>

<artifactId>log4j</artifactId>

<version>${log4j.version}</version>

</dependency>

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-api</artifactId>

<version>${slf4j.version}</version>

</dependency>

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-log4j12</artifactId>

<version>${slf4j.version}</version>

</dependency>

<!-- log end -->

<!-- 映入JSON -->

<dependency>

<groupId>org.codehaus.jackson</groupId>

<artifactId>jackson-mapper-asl</artifactId>

<version>1.9.13</version>

</dependency>

<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->

<dependency>

<groupId>com.fasterxml.jackson.core</groupId>

<artifactId>jackson-core</artifactId>

<version>2.8.0</version>

</dependency>

<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->

<dependency>

<groupId>com.fasterxml.jackson.core</groupId>

<artifactId>jackson-databind</artifactId>

<version>2.8.0</version>

</dependency>

<dependency>

<groupId>commons-fileupload</groupId>

<artifactId>commons-fileupload</artifactId>

<version>1.3.1</version>

</dependency>

<dependency>

<groupId>commons-io</groupId>

<artifactId>commons-io</artifactId>

<version>2.4</version>

</dependency>

<dependency>

<groupId>commons-codec</groupId>

<artifactId>commons-codec</artifactId>

<version>1.9</version>

</dependency>

<!-- https://mvnrepository.com/artifact/com.github.abel533/ECharts -->

<dependency>

<groupId>com.github.abel533</groupId>

<artifactId>ECharts</artifactId>

<version>3.0.0</version>

</dependency>

<dependency>

<groupId>com.google.code.gson</groupId>

<artifactId>gson</artifactId>

<version>2.5</version>

<scope>compile</scope>

<optional>true</optional>

</dependency>

<dependency>

<groupId>net.sf.jxls</groupId>

<artifactId>jxls-core</artifactId>

<version>1.0.5</version>

</dependency>

<dependency>

<groupId>org.mybatis.generator</groupId>

<artifactId>mybatis-generator-core</artifactId>

<version>1.3.2</version>

</dependency>

</dependencies>

<build>

<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>

<finalName>ssm4</finalName>

</build>

2．配置文件

2.1applicationContext.xml

2.1.1第一是要引入数据文件jdbc.properties:保存数据库连接参数的信息

2.1.2第二配置数据源，这里配置了dbcp连接池

2.1.3配置SqlSessionFactory,让spring自动生成管理，这里要引用数据源和mybatis的配置文件

2.1.4配置Dao接口，class指向实现类全称

2.2mybatis.xml配置

2.2.1加载配置文件

2.3jdbc.porperties

2.4log4j.porperties

3.测试

3.1项目结构

3.1.1UserDao接口

3.1.2UserDaoImpl实现类（实现类要继承SqlSessionDaoSupport类）

3.1.3测试类

4.Mapper代理配置

4.1修改applicationContext.xml

(1)    第一种配置mapper,每个mapper都要配置一次，工程重复繁琐

(2)    第二种批量配置mapper,只要指定basepackage的包，就会到这个下面去扫描，多个包用半角逗号隔开

4.2修改mybatis.xml

(1)注释掉mapper文件的扫描

5.mapper代理测试

5.1UserMapper.java

5.2UserMapper.xml

5.3测试

5.3.1加载applicationContext.xml文件

5.3.2获取Mapper代理对象

5.3.3使用Mapper的方法操作数据库

6.使用mybatis generator自动化工具创建Mapper.java和xml文件

6.1配置generator.xml配置文件

6.2運行java代碼生成代碼

注意：file对应的位置是6.1配置文件的位置

6.3刷新工程

6.3.1po包下的Example类是用于条件查询

6.3.2测试

6.3.2.1查询测试

（1）      一般的查询是一样的

（2）      条件查询的步骤是：

1. 创建example对象，
2. 生成criteria对象
3. 通过criteria对象拼凑条件
4. 通过mapper去调用相关的查询方法传入example对象

6.3.2.2更新测试

（1）      updateByPrimaryKey需要先查询才能更新

（2）      updateByPrimaryKeySelective不需要先查询才能更新，一般用于批量更新