SpringBoot--配置Druid连接池
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内置的连接池
目前spring Boot中默认支持的连接池有dbcp,dbcp2, tomcat, hikari三种连接池。
数据库连接可以使用DataSource池进行自动配置。
- 由于Tomcat数据源连接池的性能和并发,在tomcat可用时,我们总是优先使用它。
- 如果HikariCP可用,我们将使用它。
- 如果Commons DBCP可用,我们将使用它,但在生产环境不推荐使用它。
- 最后,如果Commons DBCP2可用,我们将使用它。
以上的几种连接池,可以通过在配置application文件中配置。
spring.datasource.url=jdbc:mysql://localhost/test
spring.datasource.username=dbuser
spring.datasource.password=dbpass
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
Spring Boot能够从大多数数据库的url上推断出driver-class-name,你就不需要再指定它了。对于一个将要创建的DataSource连接池,我们需要能够验证Driver是否可用,所以我们会在做任何事情之前检查它。比如,如果你设置spring.datasource.driverClassName=com.MySQL.jdbc.Driver,然后这个类就会被加载。
配置Druid连接池
在SpringBoot 的1.5.2版本中不在支持自动配druid,,即无法通过配置项直接支持相应的连接池;这里列出的这些配置项可以通过定制化DataSource来实现。
druid介绍
Druid是一个JDBC组件,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
Druid可以做什么
- 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。
- 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。
- 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。
- 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。
- 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。
项目地址: https://github.com/alibaba/druid
Spring Boot与Druid的集成
MySQL Driver驱动包:
<
dependency
>
<
groupId
>mysql</
groupId
>
<
artifactId
>mysql-connector-java</
artifactId
>
<
scope
>runtime</
scope
>
</
dependency
>
阿里系的Druid依赖包:
<
dependency
>
<
groupId
>com.alibaba</
groupId
>
<
artifactId
>druid</
artifactId
>
<
version
>1.0.25</
version
>
</
dependency
>
application.properties配置信息
# 驱动配置信息
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url = jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf-8
spring.datasource.username = root
spring.datasource.password = adminter
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.druid.initialSize=5
spring.druid.minIdle=5
spring.druid.maxActive=20
## 配置获取连接等待超时的时间
spring.druid.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.druid.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间,单位是毫秒
spring.druid.minEvictableIdleTimeMillis=300000
spring.druid.validationQuery=SELECT 1 FROM DUAL
spring.druid.testWhileIdle=true
spring.druid.testOnBorrow=false
spring.druid.testOnReturn=false
spring.druid.poolPreparedStatements=true
spring.druid.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.druid.filters=stat,wall,log4j
# 通过connectProperties属性来打开mergeSql功能;慢SQL记录
spring.druid.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
DruidSource配置信息的定制
package
com.lf.datasource;
import
com.alibaba.druid.pool.DruidDataSource;
import
org.springframework.boot.context.properties.ConfigurationProperties;
import
org.springframework.context.annotation.Bean;
import
org.springframework.context.annotation.Primary;
import
javax.sql.DataSource;
import
java.sql.SQLException;
/**
* Created by LF on 2017/4/18.
*/
@ConfigurationProperties
(prefix =
"spring.druid"
)
public
class
DruidSource {
private
String dbUrl;
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 getDbUrl() {
return
dbUrl;
}
public
void
setDbUrl(String dbUrl) {
this
.dbUrl = dbUrl;
}
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;
}
@Bean
//声明其为Bean实例
@Primary
//在同样的DataSource中,首先使用被标注的DataSource
public
DataSource dataSource()
throws
SQLException {
DruidDataSource datasource =
new
DruidDataSource();
datasource.setUrl(
this
.dbUrl);
datasource.setUsername(username);
datasource.setPassword(password);
datasource.setDriverClassName(driverClassName);
//configuration
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);
datasource.setFilters(filters);
return
datasource;
}
}
基于注解的配置StatView的Servlet
Filter的实现类:
package
com.lf.config;
import
com.alibaba.druid.support.http.WebStatFilter;
import
javax.servlet.annotation.WebFilter;
import
javax.servlet.annotation.WebInitParam;
/**
* Created by LF on 2017/4/18.
*/
@WebFilter
(filterName =
"druidWebStatFilter"
, urlPatterns =
"/*"
,
initParams = {
@WebInitParam
(name =
"exclusions"
, value =
"*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*"
)
//忽略资源
}
)
public
class
DruidStatFilter
extends
WebStatFilter {
}
StatViewServlet:
package
com.lf.config;
import
com.alibaba.druid.support.http.StatViewServlet;
import
javax.servlet.annotation.WebInitParam;
import
javax.servlet.annotation.WebServlet;
/**
* Created by LF on 2017/4/18.
*/
@WebServlet
(urlPatterns =
"/druid/*"
,
initParams = {
@WebInitParam
(name =
"allow"
, value =
"127.0.0.1,192.168.163.1"
),
// IP白名单(没有配置或者为空,则允许所有访问)
@WebInitParam
(name =
"deny"
, value =
"192.168.1.73"
),
// IP黑名单 (存在共同时,deny优先于allow)
@WebInitParam
(name =
"loginUsername"
, value =
"admin"
),
// 用户名
@WebInitParam
(name =
"loginPassword"
, value =
"123456"
),
// 密码
@WebInitParam
(name =
"resetEnable"
, value =
"false"
)
// 禁用HTML页面上的“Reset All”功能
})
public
class
DruidStatViewServlet
extends
StatViewServlet {
private
static
final
long
serialVersionUID = -2688872071445249539L;
}
在启动类上加入@ServletComponentScan注解
基于Java的配置StatView的Servlet
package
com.lf.config;
import
com.alibaba.druid.support.http.StatViewServlet;
import
com.alibaba.druid.support.http.WebStatFilter;
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;
/**
* Created by LF on 2017/4/18.
*/
@Configuration
public
class
DruidConfig {
@Bean
public
ServletRegistrationBean registrationBean() {
ServletRegistrationBean servletRegistrationBean =
new
ServletRegistrationBean(
new
StatViewServlet());
//添加初始化参数:initParams
servletRegistrationBean.addUrlMappings(
"/druid/*"
);
//白名单:
servletRegistrationBean.addInitParameter(
"allow"
,
"127.0.0.1"
);
//IP黑名单 (存在共同时,deny优先于allow) : 如果满足deny的话提示:Sorry, you are not permitted to view this page.
servletRegistrationBean.addInitParameter(
"deny"
,
"192.168.1.73"
);
//登录查看信息的账号密码.
servletRegistrationBean.addInitParameter(
"loginUsername"
,
"admin"
);
servletRegistrationBean.addInitParameter(
"loginPassword"
,
"123456"
);
//是否能够重置数据.
servletRegistrationBean.addInitParameter(
"resetEnable"
,
"false"
);
return
servletRegistrationBean;
}
@Bean
public
FilterRegistrationBean filterRegistrationBean() {
FilterRegistrationBean filterRegistrationBean =
new
FilterRegistrationBean(
new
WebStatFilter());
//添加过滤规则.
filterRegistrationBean.addUrlPatterns(
"/*"
);
//添加不需要忽略的格式信息.
filterRegistrationBean.addInitParameter(
"exclusions"
,
"*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
);
return
filterRegistrationBean;
}
}
运行界面以及介绍
访问地址: http://192.168.163.1:8080/druid/index.html
账号和密码为在servlet中配置的
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。
原文链接:http://blog.csdn.net/l_sail/article/details/70233529
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