springboot集成druid+mybatis连接oracle数据库

2.1、配置 druid 数据源

2、 随后要进行druid 的数据源的配置，如果要想使用druid 的数据源，那么首先一定要去修改 pom.xml 配置文件，引入以下包：

　　oracle官网下载 ojdbc6.jar，直接引入的依赖不能用，亲身测试

            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.0.31</version>
            </dependency>

3、 如果要进行数据源的整合处理，直接修改 application.yml 配置文件即可：

server:
  port: 8080
  tomcat:
    uri-encoding: UTF-8
  servlet:
    session:
      timeout: 30
#    context-path:项目路径，默认是localhost:8080/
spring:
  jpa:
    database: oracle
  datasource:
    # 使用c3p0数据源
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: oracle.jdbc.driver.OracleDriver
    url: jdbc:oracle:thin:@192.168.0.5:1521:growing
    username: TeacherCommunity
    password: Growing2014
    # 下面为连接池的补充设置，应用到上面所有数据源中
    # 初始化大小，最小，最大
    initialSize: 1
    minIdle: 3
    maxActive: 216
    # 配置获取连接等待超时的时间
    maxWait: 30000
    # 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
    timeBetweenEvictionRunsMillis: 60000
    # 配置一个连接在池中最小生存的时间，单位是毫秒
    minEvictableIdleTimeMillis: 30000
    validationQuery: select 1 from dual
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    # 打开PSCache，并且指定每个连接上PSCache的大小
    poolPreparedStatements: true
    maxPoolPreparedStatementPerConnectionSize: 20
    # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
    filters: stat,wall,slf4j
    # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
    # 合并多个DruidDataSource的监控数据
    #useGlobalDataSourceStat: true

# 设置，mapper 接口路径，mapper 接口对应的xml 配置文件
mybatis:
  mapper-locations: classpath:mybatis/mapper/*.xml
  type-aliases-package: com.zcz.dao  #在springboot程序入口类处添加注解@MapperScan("com.zcz.dao")此处可省略，不添加的话这里要写上，每个dao层映射接口也要添加注解@Mapping

这里的都和上一篇博客一样就不重复了，值得一体的是pom文件，我的如下

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zcz</groupId>
    <artifactId>teachercommunitystudio</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>teachercommunitystudio</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!--开发web项目相关依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--springboot属性配置jar-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <!--springboot单元测试-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--jpa依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <!--jdbc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!-- jackson依赖包 第一个和第二个可以省略-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.6</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.6</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.6</version>
        </dependency>
        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>
        <!-- mybatis逆向工程 -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.3</version>
        </dependency>
        <!--JSON支持 -->
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.3</version>
        </dependency>
        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>
</project>

2.3、事务控制

1、 修改 IDeptService 接口，追加一个只读事务控制：

package cn.study.microboot.service;

import java.util.List;

import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import cn.study.microboot.vo.Dept;

public interface IDeptService {
    @Transactional(readOnly = true)
    public List<Dept> list() ;
}

此时配置了一个只读的事务操作，那么也就是说在这个业务方法只能够采用读的模式来进行操作。

2、 但是现在你配置了一个注解并不表示当前已经合理的支持了事务，如果要进行事务的启用，还需要在程序启动类上追加一个 新的注解配置：

package cn.study.microboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@SpringBootApplication    // 启动SpringBoot程序，而后自带子包扫描
@EnableTransactionManagement
public class StartSpringBootMain {
    public static void main(String[] args) throws Exception {
        SpringApplication.run(StartSpringBootMain.class, args);
    }
}

3、 如果现在要想更好的观察到事务的问题，最简单的做法是编写一个数据增加操作，而后为这个业务方法设置只读配置。

· 修改 IDeptDAO 接口追加一个新的方法：

package cn.study.microboot.dao;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;

import cn.study.microboot.vo.Dept;
@Mapper
public interface IDeptDAO {
    public List<Dept> findAll();
    public boolean doCreate(Dept vo) ;
}

· 修改 Dept.xml 配置文件，追加一个方法的实现 SQL 语句：

<insert id="doCreate" parameterType="Dept">
        INSERT INTO dept(dname) VALUES (#{dname}) ;
</insert>

· 在 IDeptService 接口之中追加有一个业务方法：

@Transactional((readOnly = true)
    public boolean add(Dept vo) ;

· 编写测试方法：

    @Test
    public void testAdd() throws Exception {
        Dept dept = new Dept();
        dept.setDname("测试部");
        System.out.println(this.deptService.add(dept));
    }

此时会报错

4、 如果在实际的工作之中，对于更新操作应该强制性的启动一个事务控制才对：

@Transactional(propagation=Propagation.REQUIRED)
public boolean add(Dept vo) ;

此时应该明确的表示该操作方法应该启动有一个事务的配置项。

2.4、druid 监控

druid 数据库连接池之所以使用非常广泛，其最主要的原因在于它可以直接提供性能监控。那么本次来针对于当前已经实现好 的 druid 配置来进行性能监控的处理配置。

1、 如果要想进行 Druid 的性能的监控操作，则需要做一些基础配置，例如：你访问的 IP 地址是否是白名单。

这里直接贴上自己的druid连接代码：综合各个方面整合出自己的连接方式

/**
 * 德鲁伊配置
 */
@Configuration
@ConfigurationProperties(prefix = "spring.datasource")
public class DruidConfig {

    /**
     * 主要实现WEB监控的配置处理
     * @return
     */
    @Bean
    public ServletRegistrationBean druidServlet() { // 主要实现WEB监控的配置处理
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(
                new StatViewServlet(), "/druid/*"); // 现在要进行druid监控的配置处理操作
        // 白名单
        servletRegistrationBean.addInitParameter("allow",
                "127.0.0.1,192.168.0.55");
        // 黑名单(与白名单共同存在时，deny优先于allow)
//        servletRegistrationBean.addInitParameter("deny", "192.168.1.200");
        servletRegistrationBean.addInitParameter("loginUsername", "admin"); // 用户名
        servletRegistrationBean.addInitParameter("loginPassword", "admin"); // 密码
        servletRegistrationBean.addInitParameter("resetEnable", "false"); // 是否可以重置数据源
        return servletRegistrationBean ;
    }

    /**
     * 过滤器
     * @return
     */
    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean() ;
        filterRegistrationBean.setFilter(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*"); // 所有请求进行监控处理
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.css,/druid/*");
        return filterRegistrationBean ;
    }
    /**
     * 德鲁伊详细配置
     * @return
     */
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druidDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        dataSource.setDriverClassName(driverClassName);
        dataSource.setInitialSize(initialSize);
        dataSource.setMinIdle(minIdle);
        dataSource.setMaxActive(maxActive);
        dataSource.setMaxWait(maxWait);
        dataSource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
        dataSource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        dataSource.setValidationQuery(validationQuery);
        dataSource.setTestWhileIdle(testWhileIdle);
        dataSource.setTestOnBorrow(testOnBorrow);
        dataSource.setTestOnReturn(testOnReturn);
        dataSource.setPoolPreparedStatements(poolPreparedStatements);
        dataSource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
        try {
            dataSource.setFilters(filters);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        dataSource.setConnectionProperties(connectionProperties);
        return dataSource;
    }

    //这里是从配置文件读取的参数信息
    private String url;
    private String username;
    private String password;
    private String driverClassName;
    private int initialSize;
    private int minIdle;
    private int maxActive;
    private int maxWait;
    private int timeBetweenEvictionRunsMillis;
    private int minEvictableIdleTimeMillis;
    private String validationQuery;
    private boolean testWhileIdle;
    private boolean testOnBorrow;
    private boolean testOnReturn;
    private boolean poolPreparedStatements;
    private int maxPoolPreparedStatementPerConnectionSize;
    private String filters;
    private String connectionProperties;

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getDriverClassName() {
        return driverClassName;
    }

    public void setDriverClassName(String driverClassName) {
        this.driverClassName = driverClassName;
    }

    public int getInitialSize() {
        return initialSize;
    }

    public void setInitialSize(int initialSize) {
        this.initialSize = initialSize;
    }

    public int getMinIdle() {
        return minIdle;
    }

    public void setMinIdle(int minIdle) {
        this.minIdle = minIdle;
    }

    public int getMaxActive() {
        return maxActive;
    }

    public void setMaxActive(int maxActive) {
        this.maxActive = maxActive;
    }

    public int getMaxWait() {
        return maxWait;
    }

    public void setMaxWait(int maxWait) {
        this.maxWait = maxWait;
    }

    public int getTimeBetweenEvictionRunsMillis() {
        return timeBetweenEvictionRunsMillis;
    }

    public void setTimeBetweenEvictionRunsMillis(int timeBetweenEvictionRunsMillis) {
        this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
    }

    public int getMinEvictableIdleTimeMillis() {
        return minEvictableIdleTimeMillis;
    }

    public void setMinEvictableIdleTimeMillis(int minEvictableIdleTimeMillis) {
        this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
    }

    public String getValidationQuery() {
        return validationQuery;
    }

    public void setValidationQuery(String validationQuery) {
        this.validationQuery = validationQuery;
    }

    public boolean isTestWhileIdle() {
        return testWhileIdle;
    }

    public void setTestWhileIdle(boolean testWhileIdle) {
        this.testWhileIdle = testWhileIdle;
    }

    public boolean isTestOnBorrow() {
        return testOnBorrow;
    }

    public void setTestOnBorrow(boolean testOnBorrow) {
        this.testOnBorrow = testOnBorrow;
    }

    public boolean isTestOnReturn() {
        return testOnReturn;
    }

    public void setTestOnReturn(boolean testOnReturn) {
        this.testOnReturn = testOnReturn;
    }

    public boolean isPoolPreparedStatements() {
        return poolPreparedStatements;
    }

    public void setPoolPreparedStatements(boolean poolPreparedStatements) {
        this.poolPreparedStatements = poolPreparedStatements;
    }

    public int getMaxPoolPreparedStatementPerConnectionSize() {
        return maxPoolPreparedStatementPerConnectionSize;
    }

    public void setMaxPoolPreparedStatementPerConnectionSize(int maxPoolPreparedStatementPerConnectionSize) {
        this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
    }

    public String getFilters() {
        return filters;
    }

    public void setFilters(String filters) {
        this.filters = filters;
    }

    public String getConnectionProperties() {
        return connectionProperties;
    }

    public void setConnectionProperties(String connectionProperties) {
        this.connectionProperties = connectionProperties;
    }
}

　　完毕！ 运行项目

　　在浏览器输入  http://localhost:8080/druid/login.html  然后输入自己配置的用户名和密码，即可登录，如下图

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