小编Nas*_*LEK的帖子

拥有此项目依赖项:

  "dependencies": {
    "@angular/common": "2.0.0-rc.6",
    "@angular/compiler": "2.0.0-rc.6",
    "@angular/core": "2.0.0-rc.6",
    "@angular/forms": "2.0.0-rc.6",
    "@angular/http": "2.0.0-rc.6",
    "@angular/platform-browser": "2.0.0-rc.6",
    "@angular/platform-browser-dynamic": "2.0.0-rc.6",
    "@angular/router": "3.0.0-rc.2",
    "ng2-bootstrap": "^1.1.1",
    "reflect-metadata": "^0.1.8",
    "core-js": "^2.4.0",
    "es6-module-loader": "^0.17.8",
    "rxjs": "5.0.0-beta.11",
    "systemjs": "0.19.27",
    "zone.js": "0.6.17",
    "jquery": "3.0.0",
  }

这个登录模板:

<form #loginForm="ngForm" (ng-submit)="authenticate(loginForm.value)">
</form>

而这个登录组件:

import { Component } from '@angular/core';
import {Http, Headers}  from '@angular/http';
@Component({
    moduleId: module.id,
    selector: 'login-cmp',
    templateUrl: 'login.component.html'
})
export class LoginComponent {
  constructor($http: Http) {
    this.$http = $http;
  }
  authenticate(data) {
   ... 
  }
}

我有这个错误:

zone.js?1474211973422:484 Unhandled …

使用@Transactional(value ="erpJPA",propagation = Propagation.NESTED)我有例外

    Caused by: org.springframework.transaction.NestedTransactionNotSupportedException: 
JpaDialect does not support savepoints - check your JPA provider's capabilities

firebird不支持1.5版的嵌套事务吗？

例如:

static private DateFormat df = new SimpleDateFormat();
public static void format(final Date date) { 
   for (int i = 0; i < 10; i++) 
     new Thread(new Runnable() {
         public void run() {
             System.out.println(df.format(date));
         } 
     });
}

将DateFormat类记录为不同步类,但如果我们只使用格式方法,它不能改变整个阶级的地位？

假设它被声明为私有,如何确保代码是线程安全的？

修复此代码的最佳方法是什么？:

1. 为每个线程使用不同的实例.

2. 使用同步块.

请不要告诉我许可证问题.

我只是希望能够同时在两个环境(Android/IOS)中测试我的代码.

我对IOS的虚拟化不感兴趣,因为它非常慢.

使用该插件io.spring.dependency-management，我的某些依赖项版本可以从其他依赖项中扣除

id("io.spring.dependency-management") version "1.0.6.RELEASE"
dependencyManagement {
    imports {
        mavenBom(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES)
    }
}

使用gradlew clean build install

确实使用不包含许多依赖项版本的 pom 安装 jar。

运行依赖于第一个 JAR 的另一个子模块的构建，结果为：

Errors occurred while build effective model from C:\APPLIS\HELIOSDEV\repo\com\sfr\ext_ope\library_ext_ope_admin\
0.0.1-SNAPSHOT\library_ext_ope_admin-0.0.1-SNAPSHOT.pom:
'dependencies.dependency.version' for io.github.jhipster:jhipster-framework:jar 
is missing. in com.sfr.ext_ope:library_ext_ope_admin:0.0.1-SNAPSHOT

如何强制构建在生成的 pom 中添加版本？

拥有超过520个表的ERP数据库,EntityPersister的postInstanciate非常慢并且消耗超过512M,这对于仅一个会话Factory而言,应用程序变得非常慢.

拥有这个实体

@Table(keyspace = KEYSPACE)
public class CE_TimeSeries extends Entity implements TimeSeriesPoint{

    @PartitionKey(1)
    private String typeId;
    @ClusteringColumn(value=1, asc=true)
    private String userId;
    @ClusteringColumn(value=2, asc=true)
    private Date startDate;  
    @Column
    private Date endDate;  
    @Column
    private int groupInterval;
    @Column
    private int interval;
}

这个CQL

SELECT startDate, endDate, groupInterval, interval FROM CE_TimeSeries WHERE typeId 
= :typeId and userId = :userId and ( endDate >= :fromDate or  ( startDate >= 
:fromDate and   startDate <= :toDate ) )

给出例外：

Caused by: com.datastax.driver.core.exceptions.SyntaxError: line 1:142 
mismatched input 'or' expecting …

鉴于Visual Studio Code基于Chrome Web工具包

我们可以在编辑器中打开预览作为面板吗？

根据此页面,这个功能是高度要求!

上课:

public abstract class A{
   //i need a shared setter here to do some common code. 
}
public class B extends A{
   private Long id;
   public void setId(Long id){
       this.id = id;
   }
}
public class C extends A{
   private String id;
   public void setId(String id){
       this.id = id;
   }
}

最好的方法是什么,我不知道它是否与"动态代理"有关系？

有这个错误

java.lang.NumberFormatException: For input string: "20,00"
    at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)
    at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
    at java.lang.Double.parseDouble(Double.java:538)
    at com.agitech.autofaces.el.FormatUtil.parseDouble(FormatUtil.java:122)
    at com.agitech.erp.converter.DoubleConverter.getAsObject(DoubleConverter.java:27)

读完十进制分隔符数字格式后,我试试

public class FormatUtil {
    public static char ApplicationDecimalSeparator = ',';
    public static char SystemDecimalSeparator;
    static {        
        DecimalFormatSymbols symbols= DecimalFormatSymbols.getInstance();
        SystemDecimalSeparator = symbols.getDecimalSeparator();     
        symbols.setDecimalSeparator(ApplicationDecimalSeparator);
    }
    public final static Double parseDouble(String d){
        if (d==null)
            return 0.0;
        return Double.parseDouble( fixDecimalSeparator(d) );
    }
    public final static String fixDecimalSeparator(String d){
        if (SystemDecimalSeparator==ApplicationDecimalSeparator)
            return d;
        return d.replaceAll( ""+SystemDecimalSeparator, ""+ApplicationDecimalSeparator);
    }
}

最后SystemDecimalSeparator已经是','为什么这个例外呢？

它可能期待20.00,但如何获得和修复这个separtor？

事实上,我测试和它的预测"20.00"而默认的SystemDecimalSeparator已经是','