我在Microsoft SQL Server Management Studio A_table的数据库(称之为A_db)中有一个表(称之为),有10行.
我有另一个数据库(称之为B_db),它有一个表(调用它B_table),它具有与之相同的列设置A_table.但这B_table是空的.
我想要的是:
A_table到B_table.Microsoft SQL Server Management Studio 2012中是否有任何选项可以从表中创建插入SQL?或者还有其他选择吗?
我创建了一个自动增量的主键.
ID=1, ID=2ID=3如何将自动增量重置或重启为1?
在我的数据库中,我有一个表(默认值),当我从表生成一个实体时,我得到这两个类:
@Entity
public class Defaults implements Serializable {
private static final long serialVersionUID = 1L;
@EmbeddedId
protected DefaultsPK DefaultsPK;
@Column(name = "ERTEK")
private String ertek;
getter/setter...
}
@Embeddable
public class DefaultsPK implements Serializable {
@Basic(optional = false)
@Column(name = "VALUE_1")
private String value1;
@Basic(optional = false)
@Column(name = "TYPE")
private String type;
@Basic(optional = false)
@Column(name = "VALID_FROM")
@Temporal(TemporalType.TIMESTAMP)
private Date validFrom;
@Basic(optional = false)
@Column(name = "VALID_TO")
@Temporal(TemporalType.TIMESTAMP)
private Date validTo;
getter/setter...
}
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这就是为什么因为主键包含值.我想计算表中的所有行,所以我使用这段代码:
String sql = "SELECT COUNT(d) …Run Code Online (Sandbox Code Playgroud) 我正在尝试将我的 SpringBoot maven 项目更新到 Java 17。
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
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我定义了工作 maven-jaxb2-plugin 插件,它从 XSD 文件成功创建了 java 类。
<plugin>
<groupId>org.jvnet.jaxb2.maven2</groupId>
<artifactId>maven-jaxb2-plugin</artifactId>
<version>0.14.0</version>
<executions>
<execution>
<id>my_schema</id>
<phase>generate-sources</phase>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<schemaDirectory>src/main/resources/my/files</schemaDirectory>
<schemaIncludes>
<include>*.xsd</include>
</schemaIncludes>
<bindingDirectory>src/main/resources/my/files</bindingDirectory>
<bindingIncludes>
<include>bindings.xml</include>
</bindingIncludes>
<args>
<arg>-extension</arg>
<arg>-Xnamespace-prefix</arg>
</args>
</configuration>
</execution>
</executions>
</plugin>
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但自从java和插件升级后我就不能这样做了。
我定义了插件必要的依赖项:
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-core</artifactId>
<version>3.0.2</version>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>3.0.2</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>jakarta.xml.bind</groupId>
<artifactId>jakarta.xml.bind-api</artifactId>
<version>3.0.1</version>
</dependency>
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但在 Maven 构建过程中我仍然收到未知错误:
Oct 19, 2021 10:07:06 PM com.sun.xml.bind.v2.runtime.reflect.opt.Injector <clinit> …Run Code Online (Sandbox Code Playgroud) 我有一个QUARTZ JOB,每10分钟启动一次.
如果JOB未在10分钟内完成,则在接下来的第10分钟,另一个JOB将启动.
我想要的是:如果前一个JOB已经完成运行,则下一个JOB(每10分钟后)应该只启动.有什么办法吗?
我想要的是:
这是我的按钮代码:
@Override
protected void onInitialize() {
add(createOkLink());
}
private IndicatingAjaxLink<Void> createOkLink() {
final IndicatingAjaxLink<Void> ret = new IndicatingAjaxLink<Void>("okLink") {
private static final long serialVersionUID = 1L;
@Override
public void onClick(AjaxRequestTarget target) {
//when I click on it, this button (link) should not be enabled while the rest of the methods are not finished.
method1(); //about 2-5 seconds running time
method2(); //about 2-5 seconds running time
method3(); //about 2-5 seconds running time
feedback.success("success");
target.add(feedback);
//after every method has finished, …Run Code Online (Sandbox Code Playgroud) 现在我知道如何在android中绘制GIF图片,这里是代码:
public class GIFView extends View{
private Movie movie;
private InputStream is;
private long moviestart;
public GIFView(Context context) {
super(context);
is=getResources().openRawResource(R.drawable.anim_cerca);
movie=Movie.decodeStream(is);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
long now=android.os.SystemClock.uptimeMillis();
if (moviestart == 0)
moviestart = now;
int relTime = (int)((now - moviestart) % movie.duration());
movie.setTime(relTime);
movie.draw(canvas,10,10);
this.invalidate();
}
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}
最后,有movie.draw(canvas,x,y)代码,其中x和y是gif图片的坐标(x = left,y = top).但是我怎么能改变电影的宽度和高度呢?也许给出正确和最低的坐标,但是如何,在哪里?谢谢!
My application logging crashes during maven build in the tests. This is the log4j2.xml what I have in the src/test/resources:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO">
<Appenders>
<Console name="stdout" target="SYSTEM_OUT">
<PatternLayout pattern="MyApp: %d{yyyy-MM-dd HH:mm:ss,SSS} %5p [%t] %c{1.} - %m%n" />
</Console>
</Appenders>
<Loggers>
<Logger name="com.my.app" level="info" additivity="false">
<Appender-ref ref="stdout"/>
</Logger>
<Root level="error">
<Appender-ref ref="stdout"/>
</Root>
</Loggers>
</Configuration>
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And I get this exception during test during build:
2017-11-23 15:12:28,371 main ERROR An exception occurred processing Appender stdout java.lang.NullPointerException
at org.apache.logging.log4j.core.impl.ThrowableProxy.toExtendedStackTrace(ThrowableProxy.java:671)
at org.apache.logging.log4j.core.impl.ThrowableProxy.<init>(ThrowableProxy.java:138) …Run Code Online (Sandbox Code Playgroud) 请有人帮我举个例子。我想创建一个简单的 Prolog 程序,将两个数字相加,然后 Java 程序将其写入控制台!所以 Prolog 正在添加,Java 程序正在写入结果。我可以在prolog中编写添加,但我不知道如何在java中调用prolog程序。=(请可以创建这个小例子的人写在这里!谢谢!!