Spring Boot使用Druid加密成功版本

1.springboot默认连接池

习惯使用springboot的小伙伴通过开始学习springboot链接数据库时，都会尝试着官方文档来 学习，所以springboot默认支持的数据库连接池c3p0和 dhcp，大家应该都很熟悉了吧，只需要在.propeties文件中配置下数据库连接字符串即可，默认采用c3p0链接池进行连接数据库，但是今天我着重记录的并非官方默认支持的链接池，而是集成性能不错的阿里数据源druid

2.阿里连接池druid介绍

druid中文文档 | druid项目

Druid介绍

Druid是一个JDBC组件，druid 是阿里开源在 github 上面的数据库连接池,它包括三部分： 
* DruidDriver 代理Driver，能够提供基于Filter－Chain模式的插件体系。 
* DruidDataSource 高效可管理的数据库连接池。 
* SQLParser 专门解析 sql 语句

Druid 有什么优点？
1. 可以监控数据库访问性能，Druid内置提供了一个功能强大的StatFilter插件，能够详细统计SQL的执行性能，这对于线上分析数据库访问性能有帮助。 
2. 替换DBCP和C3P0。Druid提供了一个高效、功能强大、可扩展性好的数据库连接池。 
3. 数据库密码加密。直接把数据库密码写在配置文件中，这是不好的行为，容易导致安全问题。DruidDruiver和DruidDataSource都支持PasswordCallback。 
4. SQL执行日志，Druid提供了不同的LogFilter，能够支持Common-Logging、Log4j和JdkLog，你可以按需要选择相应的LogFilter，监控你应用的数据库访问情况。 
5. 扩展JDBC，如果你要对JDBC层有编程的需求，可以通过Druid提供的Filter-Chain机制，很方便编写JDBC层的扩展插件

3.druid加解密浅析

首先我们来看下 druid加密的过程

通过命令：

java -cp D:\apache-maven-3.3.9\repository\com\alibaba\druid\1.0.20\druid-1.0.20.jar com.alibaba.d
ruid.filter.config.ConfigTools 123456

返回值如下：publickey代表公钥，privatekey是密码加密后的结果

privateKey:MIIBVgIBADANBgkqhkiG9w0BAQEFAASCAUAwggE8AgEAAkEA0TK4zQth0YhtXUle/bFqs2LXvBDzc1wvxPDHSF8a62CnzPadEgw+NTGb3njas
92hY9vKmVJYXu125aYWdPxElQIDAQABAkEAxeurE7NVFJxye/PSv0p/nMBDQ1b2PYpWV4lFwZ7ZJR5TIIJra7lRCFAXDeT+m+nwC8ZnHysEXQYI8wgnRBKx8
QIhAOzbG/Mbx3oUg/elftQQSP/u8CJjZUu2r7pWtH+aXIWbAiEA4htVZ3anV2b6cGxSYSNF1mWeEuhx6kGS2NgiSF+cmY8CIQCLLLB+qEsNK/LjWIZuu2b5o
//MZRVHaQBXAM2s0RoekwIhAMM6jKxwNB9wiC9IKH09IpDzXuC+mZWGFxBq1ncdLy8bAiAKOrgN543NZweSCHiWXm/eYvCUqaaERJrJy8jD8EMuCg==
publicKey:MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBANEyuM0LYdGIbV1JXv2xarNi17wQ83NcL8Twx0hfGutgp8z2nRIMPjUxm9542rPdoWPbyplSWF7tdu
WmFnT8RJUCAwEAAQ==
password:rqqQfXfY5N0x9BABjs7t7CY9IHm3aYNzuTk7frBDq1ZIliEK0UTUKclQ2+N5errzmB0/Wzk1cLRpIFn+FoVqRw==

通过加密时使用的命令我们不难看出druid对数据库密码加解密用的是configFilter这个类，所以在配置数据源链接时务必将该filter添加上，否则始终会抛出数据库连接异常，而druid是有重试机制的，默认重试30次，如果数据库做了限制频繁账号尝试连接的话，该账号有可能被锁定，导致线上数据库写入出现问题，所以缺了这样的配置实用加密连接还是蛮恐怖的，直接影响线上环境。

4.springboot使用druid（废话少说直接上代码）

首先加入依赖如下：针对该依赖配置信息（由于springboot未能全面支持druid 所以需要配置datasource)

    <dependency>  
         <groupId>com.alibaba</groupId>  
         <artifactId>druid</artifactId>  
          <version>1.0.20</version>  
    </dependency>  

    # 驱动配置信息  
    spring.datasource.type=com.alibaba.druid.pool.DruidDataSource  
    spring.datasource.url = jdbc:mysql://127.0.0.1:3306/myspringboot  
    spring.datasource.username = 用户名  
    spring.datasource.password = your encryt password  
    spring.datasource.publicKey=your publicKey
    spring.datasource.driverClassName = com.mysql.jdbc.Driver  
      
    # 连接池的配置信息  
    # 初始化大小，最小，最大  
    spring.datasource.initialSize=5  
    spring.datasource.minIdle=5  
    spring.datasource.maxActive=20  
    # 配置获取连接等待超时的时间  
    spring.datasource.maxWait=60000  
    # 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  
    spring.datasource.timeBetweenEvictionRunsMillis=60000  
    # 配置一个连接在池中最小生存的时间，单位是毫秒  
    spring.datasource.minEvictableIdleTimeMillis=300000  
    spring.datasource.validationQuery=SELECT 1 FROM DUAL  
    spring.datasource.testWhileIdle=true  
    spring.datasource.testOnBorrow=false  
    spring.datasource.testOnReturn=false  
    # 打开PSCache，并且指定每个连接上PSCache的大小  
    spring.datasource.poolPreparedStatements=true  
    spring.datasource.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  
    spring.datasource.filters=config,stat,wall,log4j  
    # 通过connectProperties属性来打开mergeSql功能；慢SQL记录  
    spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000;config.decrpt=true;
    #config.decrypt.key=your public key  

package com.rt.rest.config.druid;

import com.alibaba.druid.filter.config.ConfigTools;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import javax.sql.DataSource;
import java.sql.SQLException;

/**
 * @Description:
 * @author: <a href="[email protected]">Administrator</a>
 * @version: V1.0.0
 * @data 2018/3/6
 */
//@Configuration
//@ConfigurationProperties(prefix="spring.datasource")
public class DruidDatsSourceConfig{
    private Logger logger = LoggerFactory.getLogger(DruidDatsSourceConfig.class);
    private String type;
    private String url;
    private String driverClassName;
    private String username;
    private String password;
    private Integer initialSize;
    private Integer minIdle;
    private Integer maxActive;
    private Integer maxWait;
    private Integer timeBetweenEvictionRunsMillis;
    private Integer minEvictableIdleTimeMillis;
    private String validationQuery;
    private Boolean testWhileIdle;
    private Boolean testOnBorrow;
    private Boolean testOnReturn;
    private Boolean poolPreparedStatements;
    private Integer maxPoolPreparedStatementPerConnectionSize;
    private String filters;
    private String connectionProperties;
    private String publicKey;

    public String getDriverClassName() {
        return driverClassName;
    }

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

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    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 Integer getInitialSize() {
        return initialSize;
    }

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

    public Integer getMinIdle() {
        return minIdle;
    }

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

    public Integer getMaxActive() {
        return maxActive;
    }

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

    public Integer getMaxWait() {
        return maxWait;
    }

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

    public Integer getTimeBetweenEvictionRunsMillis() {
        return timeBetweenEvictionRunsMillis;
    }

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

    public Integer getMinEvictableIdleTimeMillis() {
        return minEvictableIdleTimeMillis;
    }

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

    public String getValidationQuery() {
        return validationQuery;
    }

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

    public Boolean getTestWhileIdle() {
        return testWhileIdle;
    }

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

    public Boolean getTestOnBorrow() {
        return testOnBorrow;
    }

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

    public Boolean getTestOnReturn() {
        return testOnReturn;
    }

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

    public Boolean getPoolPreparedStatements() {
        return poolPreparedStatements;
    }

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

    public Integer getMaxPoolPreparedStatementPerConnectionSize() {
        return maxPoolPreparedStatementPerConnectionSize;
    }

    public void setMaxPoolPreparedStatementPerConnectionSize(Integer 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;
    }

    public String getPublicKey() {
        return publicKey;
    }

    public void setPublicKey(String publicKey) {
        this.publicKey = publicKey;
    }

    @Bean
    public ServletRegistrationBean druidServlet() {
        ServletRegistrationBean reg = new ServletRegistrationBean();
        reg.setServlet(new StatViewServlet());
        reg.addUrlMappings("/druid/*");
        reg.addInitParameter("loginUsername", username);
        reg.addInitParameter("loginPassword", password);
        return reg;
    }
    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        filterRegistrationBean.addInitParameter("profileEnable", "true");
        return filterRegistrationBean;
    }
    @Bean
    @Primary
    public DataSource druidDataSource() throws Exception {
        DruidDataSource datasource = new DruidDataSource();
        datasource.setUrl(url);
        datasource.setUsername(username);
        datasource.setPassword(ConfigTools.decrypt(publicKey,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);
        String paramArray[] = connectionProperties.split(";");
        datasource.setConnectionProperties(connectionProperties);
        try {
            datasource.setFilters(filters);
        } catch (SQLException e) {
            logger.error("========druid configuration initialization filter========", e);
        }
        return datasource;
    }
}

原文地址，本文略有改动

http://blog.csdn.net/ikownyou/article/details/79022560

查看更多戳这里

https://github.com/alibaba/druid/wiki/常见问题

开源中国

https://www.oschina.net/news/93304/druid-1-1-8-released