Java读取/写入Yaml配置文件

JYaml文件流读取/写入Yaml配置文件

yaml配置文件格式规范：- 表示sequence(list列表结构)，: 表示map键值对

#以下是示例yaml结构

age: 23
children: 
  - 
    age: 8
    name: mary1
    sex: man
  - 
    age: 9
    name: simon2
    sex: fatel
name: simon.zhang
sex: man

1.准备工作，创建Persion实体类

package com.yaml.entity;

import java.util.List;

/**
 * Created by simon on 16-6-12.
 */
public class Person {
    private String name;
    private int age;
    private String Sex;
    private List<Person> children;

    //省略 getter and setter method.....
}

2.实现读取/写入yaml配置文件

package com.yaml;

import com.yaml.entity.Person;
import org.ho.yaml.Yaml;
import org.junit.Test;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;

/**
 * Hello world!
 */
public class App {

    //写入yaml配置文件
    @Test
    public  void write() {
        /* Initialize data. */
        Person father = new Person();
        father.setName("simon.zhang");
        father.setAge(23);
        father.setSex("man");
        List<Person> children=new ArrayList<Person>();
        for (int i = 8; i < 10; i++) {
            Person child = new Person();
            if (i % 2 == 0) {
                child.setSex("man");
                child.setName("mary" + (i - 7));
            } else {
                child.setSex("fatel");
                child.setName("simon" + (i - 7));
            }
            child.setAge(i);
            children.add(child);
        }
        father.setChildren(children);
        /* Export data to a YAML file. */
        File dumpFile = new File(System.getProperty("user.dir") + "/test/src/main/conf/testYaml.yaml");

        try {
            Yaml.dump(father, dumpFile);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }

    //读取yaml配置文件
    @Test
    public  void  read() throws FileNotFoundException {
        File dumpFile=new File(System.getProperty("user.dir") + "/test/src/main/conf/testYaml.yaml");
        Person father = (Person) Yaml.loadType(dumpFile, Person.class);
        StringBuilder stringBuilder=new StringBuilder();
        stringBuilder.append(father.getName())
                .append("\t")
                .append(father.getSex())
                .append("\t")
                .append(father.getAge())
                .append("\t")
                .append(father.getChildren().size());
        System.out.println(stringBuilder.toString());

    }
}

Map结构的yaml文件

JDBC.driver: com.mysql.jdbc.Driver
JDBC.url: "jdbc:mysql://127.0.0.1:3306/shipping_local?autoReconnect=true&autoReconnectForPools=true&useUnicode=true&characterEncoding=utf8"
JDBC.username: shipping
JDBC.password: shipping
JDBC.autoCommit: false

读取Map结构

//读取yaml配置文件Map结构
    @Test
    public  void  read2() throws FileNotFoundException {
        File dumpFile=new File(System.getProperty("user.dir") + "/test/src/main/conf/testYaml.yaml");
        Map father =Yaml.loadType(dumpFile, HashMap.class);
        for(Object key:father.keySet()){
            System.out.println(key+":\t"+father.get(key).toString());
        }
    }

打印结果如下：

提供 Maven pox.xml 作为参考

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.yaml</groupId>
    <artifactId>test</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>test</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.jyaml</groupId>
            <artifactId>jyaml</artifactId>
            <version>1.3</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
</project>