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https://github.com/hwywl/business-tools

在开发中积攒下来的业务工具类,方便快速编写业务。
https://github.com/hwywl/business-tools

html parquet parquet-generator parquet-tools

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在开发中积攒下来的业务工具类,方便快速编写业务。

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# business-tools
在开发中积攒下来的业务工具类,方便快速编写业务。

[![author](https://img.shields.io/badge/author-HWY-red.svg)](https://github.com/HWYWL) [![996.icu](https://img.shields.io/badge/link-996.icu-red.svg)](https://996.icu)

## 安装
**maven**
```

com.github.hwywl
business-tools
1.0.3-RELEASE

```

**Gradle**
```
implementation 'com.github.hwywl:business-tools:1.0.3-RELEASE'
```

## 一个增强parquet文件方便读写的工具类
通过反射自动生成MessageType,自动拼装数据结构,遵循简单的原则,你给我数据我给你parquet文件。
目前支持的数据类型如下:
- int、Integer
- long、Long
- float、Float
- double、Double
- String

### 使用

可以查看github中的源码,不看也行,很简单的,使用如下:
```java
public class ParquetUtilTest {
String filePath = "F:\\a.parquet";

/**
* 写入一个数据到parquet文件
*
* @throws IOException
* @throws CustomException
*/
@Test
public void ParquetWriteTest() throws IOException, CustomException, IntrospectionException {
TestModel model = getModel();
ParquetUtil.writerParquet(filePath, model);
}

/**
* 写入多个数据到parquet文件
*
* @throws IOException
* @throws CustomException
*/
@Test
public void ParquetWriteListTest() throws IOException, CustomException, IntrospectionException {
List models = getModels();
ParquetUtil.writerParquet(filePath, models);
}

/**
* 开放原始API,可以用于非一次性写入
*
* @throws IOException
* @throws CustomException
* @throws IntrospectionException
*/
@Test
public void ParquetWriteGroupListTest() throws IOException, CustomException, IntrospectionException {
ParquetWriter writer = ParquetUtil.getParquetWriter(filePath, TestModel.class);
Group group = ParquetUtil.getGroup(getModel());
writer.write(group);

// close写出文件
writer.close();
}

/**
* 将parquet文件转为对象集合
*
* @throws IOException
*/
@Test
public void ParquetReadBeanTest() throws IOException {
List models = ParquetUtil.readParquetBean(filePath, TestModel.class);
System.out.println(models);
}

/**
* 将parquet文件转为Map集合
*
* @throws IOException
*/
@Test
public void ParquetReadMapTest() throws IOException {
List> maps = ParquetUtil.readParquetMap(filePath);
System.out.println(maps);
}

/**
* 将parquet文件转为对象集合,并只拿2条数据
*
* @throws IOException
*/
@Test
public void ParquetReadBeanMaxLineTest() throws IOException {
List models = ParquetUtil.readParquetBean(filePath, 2, TestModel.class);
System.out.println(models);
}

/**
* 测试数据
*
* @return
*/
private TestModel getModel() {
return new TestModel(2, 3, 6L, "校花", 10);
}

/**
* 测试数据
*
* @return
*/
private List getModels() {
List arrayList = new ArrayList<>();

for (int i = 0; i < 10; i++) {
arrayList.add(new TestModel(2, 3, 6L, "校花", 10));
}

return arrayList;
}
}
```

## HTML表格生成,可用于邮件发送或者直接展示前端
### 示例1:
```
public class HtmlTest {
@Test
public void htmlReadTest() {
String template = EmailTemplateUtil.htmlMapTemplate("测试", getModels());
System.out.println(template);
}

/**
* 测试数据
*
* @return 测试数据
*/
private List> getModels() {
List> arrayList = new ArrayList<>();

for (int i = 0; i < 10; i++) {
Map map = new LinkedHashMap<>();
map.put("校花", "张花");
map.put("美女", "李花");
map.put("小萝莉", "茉莉花");
map.put("御姐", null);
map.put("班花", 111);

arrayList.add(map);
}

return arrayList;
}
}
```
![](https://hwy-figure-bed.oss-cn-hangzhou.aliyuncs.com/blog/image/1630996191028-ceshi2.png)

### 示例2:
```
public class HtmlTest {
@Test
public void htmlReadBeanTest() {
String template = EmailTemplateUtil.htmlBeanTemplate("测试", getBeanModels());
System.out.println(template);
}

/**
* 测试数据
*
* @return
*/
private List getBeanModels() {
List arrayList = new ArrayList<>();

for (int i = 0; i < 10; i++) {
arrayList.add(new HtmlModel(2, 3, 6L, "校花", 10));
}

return arrayList;
}
}
```

HtmlModel类
```
public class HtmlModel {
@HtmlAnnotation("游戏id")
int app_id;
@HtmlAnnotation("VIP等级")
Integer svip_level;
@HtmlAnnotation("VIP剩余时间")
Long svip_remain;
@HtmlAnnotation("游戏名称")
String name;
@HtmlAnnotation("充值金额")
double money;
}
```
![](https://hwy-figure-bed.oss-cn-hangzhou.aliyuncs.com/blog/image/1630996121533-ceshi.png)

## 一个简单封装的多线程并行工具类
在我们业务中很多场景为了速度是需要多线程并行运算的,最后再把各个结果集合起来返回。
示例:
```java
public class ParallelThreadTest {
/**
* 测试并发执行运算
*/
@Test
public void parallelTest() throws InterruptedException {
List list = new ArrayList<>();

// 模拟四个线程并发执行,最后得到一个结果集
Runnable runnable1 = () -> list.addAll(getBeanModels());
Runnable runnable2 = () -> list.addAll(getBeanModels());
Runnable runnable3 = () -> list.addAll(getBeanModels());
Runnable runnable4 = () -> list.addAll(getBeanModels());

List tasks = Arrays.asList(runnable1, runnable2, runnable3, runnable4);

int secs = ParallelThread.parallelThreadTask(tasks);

// 这句代码在正式环境中没有意义,这里是为了防止主线程结束
// Junit不支持多线程
Thread.sleep(3000);

System.out.println("线程耗时:" + secs + "毫秒");
System.out.println(list);
}

/**
* 测试数据
*
* @return
*/
private List getBeanModels() {
List arrayList = new ArrayList<>();

for (int i = 0; i < 2; i++) {
arrayList.add(new HtmlModel(2, 3, 6L, "校花", 10));
}

return arrayList;
}
}
```

## 1.0.3-RELEASE 版本更新
1. 增加一个简单的多线程并发执行工具
2. 升级开源工具类

## 1.0.2-RELEASE 版本更新
1. 开放parquet文件写入的原始API
2. 修复写入parquet文件乱序问题

## 1.0.1-RELEASE 版本更新
1. 增加parquet文件的读写
2. 增加html表格的生成。

### 感谢
- 工具还有不足之处,请大家Issues ヾ(๑╹◡╹)ノ"
- 我那么可爱你不点个star吗 φ(>ω<*)

### 问题建议

- 联系我的邮箱:ilovey_hwy@163.com
- 我的博客:https://www.hwy.ac.cn
- GitHub:https://github.com/HWYWL