我通过以下属性动态创建DataSource来连接到mysql数据库,它工作正常,但过了一段时间它不断给我错误"无法获取JDBC连接".
package com.test.db;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import java.util.HashMap;
@Configuration
@EnableJpaRepositories(basePackages = "com.test.master", entityManagerFactoryRef = "userMasterEntityManager", transactionManagerRef = "userMasterTransactionManager")
public class MasterDBConfig {
@Bean
@Primary
public LocalContainerEntityManagerFactoryBean userMasterEntityManager() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setPackagesToScan(new String[] { "com.test.master" });
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
HashMap<String, Object> properties = new HashMap<>();
properties.put("hibernate.hbm2ddl.auto", "create");
properties.put("hibernate.id.new_generator_mappings", "false");
properties.put("hibernate.show_sql", "true");
properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
properties.put("hibernate.testOnBorrow", "true");
properties.put("hibernate.validationQuery", "SELECT 1");
properties.put("hibernate.testWhileIdle", "true");
// …Run Code Online (Sandbox Code Playgroud) 如何获取 outputStream 的字节,或者如何将 outputStream 转换为字节数组?
我想从数据库中获取值并在视图中显示它,但我没有得到正确的结果.
这是我的控制器:
class HrRequestController extends Controller
{
/**
* Create a new controller instance.
*
* @return void
*/
public function __construct()
{
$this->middleware('auth');
}
/**
* Display a listing of the resource.
*
* @return \Illuminate\Http\Response
*/
public function index()
{
$hr_request = HrRequest::all();
return array(
'status' => 'success',
'pages' => $hr_request->toArray());
}
}
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这是我的模特:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class HrRequest extends Model
{
/**
* The table associated with the model.
*
* …Run Code Online (Sandbox Code Playgroud) 我对spring boot + jpa有一个小问题。我已经将依赖项添加到POM.xml中,我可以从spring工具套件(作为spring boot应用程序运行)正常运行它。但是,当我从命令行“ mvn spring-boot:run”运行时,它将引发错误。
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building THA 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> spring-boot-maven-plugin:1.5.2.RELEASE:run (default-cli) > test-compile @ THA >>>
[WARNING] The POM for org.springframework:spring-jdbc:jar:4.3.7.RELEASE is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for org.jboss:jandex:jar:2.0.0.Final is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for org.springframework.data:spring-data-jpa:jar:1.11.1.RELEASE is invalid, transitive …Run Code Online (Sandbox Code Playgroud) 有人可以澄清为什么下面的字体样式设置在 chrome 中不起作用,但在 IE 和 FireFox 中起作用。
我的网站有同样的问题,它没有选择 CSS 字体设置(normal提到的地方),因此我使用W3Schools 的 CSS 测试环境进行了测试,行为是相同的。
CSS 片段:
font-family: Arial, Helvetica, sans-serif normal;font-family: Arial, Helvetica, sans-serif;尝试在 Chrome 和 IE 中查看差异。
body {
font-family: "Times New Roman", serif;
}
p.serif {
font-family: Arial, Helvetica, sans-serif;
}
p.sansserif {
font-family: Arial, Helvetica, sans-serif normal;
}Run Code Online (Sandbox Code Playgroud)
<h1>CSS font-family</h1>
<p class="serif">This is a paragraph, shown in Arial Without Normal.</p>
<p class="sansserif">This is a paragraph, shown in …Run Code Online (Sandbox Code Playgroud)我有一个包含几个字典的数组.
{
DisplayName?:"Name of the employee"
Age:28
Department:"Dept 2"
}
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我刚刚将我的objective-c代码转换为swift并试图像这样过滤.
let exists = NSPredicate(format: "DisplayName2 CONTAINS[cd] \(searchText!)")
let aList: Array<Any> = arrayDirectory.filter { exists.evaluate(with: $0) }
if(aList.count>0)
{
arrayDirectory=aList
facesCarousel.reloadData()
}
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但我总是将aList计数设为0.似乎没有过滤我的数组.如何NSPredicate在swift 3中正确编写并使用它过滤我的数组.
首先,我创建一个配置单元分区表:
hive> create table partition_table
> (sid int ,sname string ,age int)
> partitioned by (sex string)
> row format delimited fields terminated by',';
OK
Time taken: 1.232 seconds
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表desc如下所示:
hive> desc partition_table;
OK
sid int
sname string
age int
sex string
# Partition Information
# col_name data_type comment
sex string
Time taken: 0.34 seconds, Fetched: 9 row(s)
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然后将一些数据插入此表中,但是它不起作用。
hive> insert into table partition_table partition(sex='M')select sno ,sname ,age from student1 where sex ='M';
FAILED: SemanticException [Error 10006]: Line 1:44 Partition …Run Code Online (Sandbox Code Playgroud) 源树有两个目录.什么是揭示其变化的最佳软件.不仅应该是文件名,还应该是一些文件比较查看器.如果它是免费工具可能会更好.
我想将UUID用于数据库记录,但如果我将其用于URL,我希望它是5到8个字符.
我知道我需要使用SecureRandom和base64,但我如何指定我需要的长度?
如何遍历给定数据库的表中的所有列标题,并将每个列名单独添加到数组中?
我知道我可以从表中收集所有信息,SELECT * FROM my_table但此时我只需要处理列标题.完成此任务的最佳方法是什么?
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