如何将sparks.read.table方法读出的数据放入hive表中
时间: 2024-05-12 21:16:50 浏览: 8
可以通过以下步骤将 `sparks.read.table` 方法读出的数据放入 Hive 表中:
1. 在 Spark Shell 中创建一个 SparkSession 对象,并将其绑定到 Hive 元数据库中。
```
$ spark-shell --master yarn \
--conf spark.sql.warehouse.dir=hdfs://<hive-warehouse-dir> \
--conf spark.sql.catalogImplementation=hive \
--conf spark.sql.hive.convertMetastoreParquet=false
```
2. 使用 `spark.sql` 方法创建 Spark Dataframe 并将其写入 Hive 表中。
```
val dataframe = spark.read.table("<your-spark-table>")
dataframe.write.format("hive").mode("append").saveAsTable("<your-hive-table>")
```
请注意,`spark.read.table` 创建的 Spark Dataframe 必须与 Hive 表的模式匹配,否则可能会遇到类型转换错误。
相关问题
sparks输入wordCount.collect()后出现ERROR executor.Executor: Exception in task 1.0 in stage 0.0 (TID 1)
这个错误可能是由于输入数据格式不正确或者是内存不足导致的。首先,你可以尝试检查输入数据的格式是否符合预期。另外,你也可以尝试增加 Spark 的内存设置,例如通过设置 `spark.driver.memory` 和 `spark.executor.memory` 参数来增加内存限制。如果问题仍然存在,你可以尝试调整 Spark 的分区数量,以减少每个任务的负荷。
基于java中的main方法 生成心型烟花代码
以下是一个基于 Java 的生成心型烟花的代码示例:
```java
import java.awt.Color;
import java.awt.Graphics;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class HeartFirework extends JPanel implements Runnable {
private static final long serialVersionUID = 1L;
private static final int WIDTH = 400;
private static final int HEIGHT = 400;
private static final int FIREWORK_NUM = 10;
private static final int FIREWORK_SIZE = 20;
private static final int MAX_SPARKS = 100;
private static final int GRAVITY = 1;
private static final int FPS = 30;
private static final int DELAY = 1000 / FPS;
private Firework[] fireworks = new Firework[FIREWORK_NUM];
private Thread animator;
public HeartFirework() {
setBackground(Color.BLACK);
setPreferredSize(new java.awt.Dimension(WIDTH, HEIGHT));
for (int i = 0; i < FIREWORK_NUM; i++) {
fireworks[i] = new Firework();
}
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
for (int i = 0; i < FIREWORK_NUM; i++) {
fireworks[i].draw(g);
}
}
public void run() {
while (true) {
for (int i = 0; i < FIREWORK_NUM; i++) {
fireworks[i].move();
}
repaint();
try {
Thread.sleep(DELAY);
} catch (InterruptedException e) {
System.out.println("interrupted");
}
}
}
public void start() {
animator = new Thread(this);
animator.start();
}
private class Firework {
private int x, y, vx, vy;
private Spark[] sparks = new Spark[MAX_SPARKS];
private Color color;
public Firework() {
Random rand = new Random();
x = rand.nextInt(WIDTH);
y = HEIGHT;
vx = rand.nextInt(5) - 2;
vy = -(rand.nextInt(10) + 10);
int r = rand.nextInt(255);
int g = rand.nextInt(255);
int b = rand.nextInt(255);
color = new Color(r, g, b);
for (int i = 0; i < MAX_SPARKS; i++) {
sparks[i] = new Spark(x, y, color);
}
}
public void draw(Graphics g) {
g.setColor(color);
g.fillOval(x - FIREWORK_SIZE / 2, y - FIREWORK_SIZE / 2, FIREWORK_SIZE, FIREWORK_SIZE);
for (int i = 0; i < MAX_SPARKS; i++) {
sparks[i].draw(g);
}
}
public void move() {
x += vx;
y += vy;
vy += GRAVITY;
if (y < 0) {
Random rand = new Random();
x = rand.nextInt(WIDTH);
y = HEIGHT;
vx = rand.nextInt(5) - 2;
vy = -(rand.nextInt(10) + 10);
color = new Color(rand.nextInt(255), rand.nextInt(255), rand.nextInt(255));
for (int i = 0; i < MAX_SPARKS; i++) {
sparks[i] = new Spark(x, y, color);
}
}
for (int i = 0; i < MAX_SPARKS; i++) {
sparks[i].move();
}
}
}
private class Spark {
private int x, y, vx, vy;
private Color color;
public Spark(int x, int y, Color color) {
this.x = x;
this.y = y;
this.color = color;
Random rand = new Random();
vx = rand.nextInt(21) - 10;
vy = rand.nextInt(21) - 10;
}
public void draw(Graphics g) {
g.setColor(color);
g.fillOval(x, y, 2, 2);
}
public void move() {
x += vx;
y += vy;
}
}
public static void main(String[] args) {
JFrame frame = new JFrame("Heart Firework");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
HeartFirework panel = new HeartFirework();
frame.getContentPane().add(panel);
frame.pack();
frame.setVisible(true);
panel.start();
}
}
```
运行以上代码,即可在窗口中看到生成的心型烟花效果。