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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="#12-基于集合构建">1.2 基于集合构建</a><br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="#13--基于-Socket-构建">1.3 基于 Socket 构建</a><br/>
<a href="#二自定义-Data-Source">二、自定义 Data Source</a><br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="#21-SourceFunction">2.1 SourceFunction</a><br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="#22-ParallelSourceFunction-和-RichParallelSourceFunction">2.2 ParallelSourceFunction 和 RichParallelSourceFunction</a><br/>
<a href="#三Streaming-Connectors">三、Streaming Connectors</a><br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="#31-内置连接器">3.1 内置连接器</a><br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="#32-整合-Kakfa">3.2 整合 Kakfa</a><br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="#33-整合测试">3.3 整合测试</a><br/>
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## 一、内置 Data Source
Flink Data Source 用于定义 Flink 程序的数据来源，Flink 官方提供了多种数据获取方法，用于帮助开发者简单快速地构建输入流，具体如下：