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: 23children:   -     age: 8    name: mary1    sex: man  -     age: 9    name: simon2    sex: fatelname: simon.zhangsex: man

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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.DriverJDBC.url: "jdbc:mysql://127.0.0.1:3306/shipping_local?autoReconnect=true&autoReconnectForPools=true&useUnicode=true&characterEncoding=utf8"JDBC.username: shippingJDBC.password: shippingJDBC.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>