JYaml
JYaml支持的數據類型:
- 原始數據類型和封裝類(int,java.lang.Integer)
- JavaBean兼容對象(結構支持)
- collection(sequence支持)
- List
- Set
- Map(map支持)
- Arrays(sequence支持)
- BigInteger和BigDecimal
- Date
JYaml實例:
將Java實體類寫入yaml文件
//創建實體類
package com.richfit.example;
import java.util.List;
public class General {
private String name;
private String address;
private List<String> family;
//省略getter和setter
}
package com.richfit.example;
import org.ho.yaml.Yaml;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;
public class demo {
//爲實體類賦值
public static General set(){
General general=new General();
general.setName("許褚");
general.setAddress("安徽亳州");
List<String> family=new ArrayList<String>();
family.add("父親");
family.add("母親");
general.setFamily(family);
return general;
}
//將實體類直接寫入yaml文件
public static void main(String[] args) {
File dumpfile = new File("E:\\workspace_java\\JYaml\\src\\com\\richfit\\example\\general_dump.yaml");
General general=set();
try {
Yaml.dump(general, dumpfile);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
效果如下:
--- !com.richfit.example.General
address: 安徽亳州
family:
- 父親
- 母親
name: 許褚
將yaml文件load到pojo對象
package com.richfit.example;
import org.ho.yaml.Yaml;
import java.io.File;
import java.io.FileNotFoundException;
public class Load {
public static void main(String[] args) {
General general= new General();
try {
general = (General) Yaml.load(new File("E:\\workspace_java\\JYaml\\src\\com\\richfit\\example\\general_dump.yaml"));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
System.out.println(general.getName()+" "+general.getAddress()+" "+general.getFamily());
}
}
注意:
JYaml來自如下依賴:
<!-- https://mvnrepository.com/artifact/org.jyaml/jyaml -->
<dependency>
<groupId>org.jyaml</groupId>
<artifactId>jyaml</artifactId>
<version>1.3</version>
</dependency>
可能會出現發自動導入依賴的jar包,可以下載jar包自行導入。
流處理
package com.richfit.example;
import org.ho.yaml.Yaml;
import org.ho.yaml.YamlEncoder;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
public class Flow {
public static void main(String[] args) {
File dumpfile=new File("E:\\workspace_java\\JYaml\\src\\com\\richfit\\example\\general_dump.yaml");
File dumpfile1=new File("E:\\workspace_java\\JYaml\\src\\com\\richfit\\example\\general1_dump.yaml");
try {
General general=(General) Yaml.loadType(dumpfile,General.class);
YamlEncoder encoder=new YamlEncoder(new FileOutputStream(dumpfile1));
for (int i=0;i<3;i++){
general.setName(general.getName()+i);
encoder.writeObject(general);
encoder.flush();
}
encoder.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
mongodb->pojo->yaml
//部分代碼
public void read1(String name) {
Query query = new Query(Criteria.where("name").is(name));//條件查詢
List<Book> books = this.mongoTemplate.find(query, Book.class);
File dumpfile = new File("E:\\workspace_java\\mtkl-fast\\src\\main\\java\\com\\richfit\\modules\\mongo\\test\\book.yaml");
try {
for (Book book : books) {
Yaml.dump(book, dumpfile);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
**求助:**將實體類序列化成yaml文件的時候,由於Java類的屬性名只能小寫開頭,如果生成的yaml文件的部分key是大寫開頭,應該如何處理?還請知道的大佬能夠指點一下小弟,不勝感激!!!