java整合datax mysql 增量同步,不使用shell脚本运行,使用纯java代码如何实现
时间: 2024-03-12 11:48:25 浏览: 82
要实现Java整合DataX MySQL增量同步,可以使用DataX的Java API来完成。
首先,需要在pom.xml文件中添加DataX相关依赖:
```xml
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>datax-core</artifactId>
<version>${datax.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>datax-commons</artifactId>
<version>${datax.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>datax-transport</artifactId>
<version>${datax.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>datax-plugin-rdbms-util</artifactId>
<version>${datax.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>datax-plugin-rdbms-reader</artifactId>
<version>${datax.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>datax-plugin-rdbms-writer</artifactId>
<version>${datax.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
```
其中,`${datax.version}`和`${mysql.version}`需要自行定义。
接下来,创建DataX的配置文件,以JSON格式保存在本地,例如:
```json
{
"job": {
"setting": {
"speed": {
"channel": 3
}
},
"content": [
{
"reader": {
"name": "mysqlreader",
"parameter": {
"username": "root",
"password": "123456",
"column": [
"id",
"name",
"age"
],
"splitPk": "id",
"connection": [
{
"jdbcUrl": "jdbc:mysql://localhost:3306/test",
"table": [
"user"
]
}
]
}
},
"writer": {
"name": "mysqlwriter",
"parameter": {
"username": "root",
"password": "123456",
"column": [
"id",
"name",
"age"
],
"preSql": "insert into user(id,name,age) values(?,?,?) on duplicate key update name=values(name),age=values(age)",
"connection": [
{
"jdbcUrl": "jdbc:mysql://localhost:3306/test",
"table": [
"user"
]
}
]
}
}
}
]
}
}
```
其中,需要配置MySQL的连接信息、表名、字段、增量同步字段等信息。
最后,在Java代码中读取配置文件,并执行DataX任务:
```java
public class DataXJob {
public static void main(String[] args) {
try {
// 读取配置文件
String jobConfig = FileUtils.readFileToString(new File("job.json"), "UTF-8");
Configuration configuration = Configuration.from(jobConfig);
// 执行DataX任务
Engine engine = new Engine();
engine.start(configuration);
} catch (Exception e) {
e.printStackTrace();
}
}
}
```
这样就可以通过Java代码实现DataX和MySQL的增量同步了。
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