yaml_配制的读取

最新推荐文章于 2025-07-15 07:07:59 发布

原创最新推荐文章于 2025-07-15 07:07:59 发布 · 816 阅读

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博客介绍了pom.xml，重点阐述了xxx.yaml文件与Java类的对应关系，给出了具体例子代码，包含关键代码展示，如通过Yaml类加载yaml文件到MasterSlaveConfig类实例，还提及了MasterSlaveRule和MyDataSource等内容。

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pom.xml

<!--yam-->
<dependency>
  <groupId>org.yaml</groupId>
  <artifactId>snakeyaml</artifactId>
  <version>1.16</version>
</dependency>

xxx.yaml文件与java类的对应关系

具体的例子代码

master-slave.yaml

dataSources:
  ds_master: !!com.qbsea.yamload.config.MyDataSource
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://xxxipxx:3306/demo_ds_master
    username: root
    password: password
  ds_slave_0: !!com.qbsea.yamload.config.MyDataSource
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://xxxipxx:3306/demo_ds_master
    username: root
    password: password
  ds_slave_1: !!com.qbsea.yamload.config.MyDataSource
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://xxxipxx:3306/demo_ds_master
    username: root
    password: password

masterSlaveRule:
  name: ds_ms
  masterDataSourceName: ds_master
  slaveDataSourceNames: [ds_slave_0, ds_slave_1]

入口

package com.qbsea.yamload;

import com.qbsea.yamload.config.MasterSlaveConfig;
import com.qbsea.yamload.config.MasterSlaveRule;
import com.qbsea.yamload.config.MyDataSource;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Map;

public class YamLoadFileTest {

public static void main(String[] args) throws IOException {
    File yamFile = getYamlFile();
    MasterSlaveConfig masterSlaveConfig = MasterSlaveConfig.unmarshal(yamFile);
    Map<String, MyDataSource> myDataSourceMap = masterSlaveConfig.getDataSources();
    for (Map.Entry<String,MyDataSource> entry:
         myDataSourceMap.entrySet()) {
        System.out.println("key=" + entry.getKey());
        MyDataSource myDataSource = entry.getValue();
        System.out.println(myDataSource.getDriverClassName());
        System.out.println(myDataSource.getUrl());
        System.out.println(myDataSource.getUsername());
        System.out.println(myDataSource.getPassword());
        System.out.println("----------");
    }
    System.out.println("--masterSlaveRule--");
    MasterSlaveRule masterSlaveRule = masterSlaveConfig.getMasterSlaveRule();
    System.out.println("slaveRule_name=" + masterSlaveRule.getName());
    System.out.println("slaveRule_masterDatasSourceName=" + masterSlaveRule.getMasterDataSourceName());
    masterSlaveRule.getSlaveDataSourceNames().stream().forEach(iteam->{
        System.out.println("item="+iteam);
    });
}
    private static File getYamlFile() {
        return new File(YamLoadFileTest.class.getResource("/META-INF/nodep/master-slave.yaml").getFile());
    }
}

MasterSlaveConfig

关键代码

Yaml yaml = new Yaml(new Constructor(MasterSlaveConfig.class));
MasterSlaveConfig masterSlaveConfig = yaml.loadAs(inputStreamReader, MasterSlaveConfig.class);
return masterSlaveConfig;

package com.qbsea.yamload.config;

import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;

import java.io.*;
import java.util.HashMap;
import java.util.Map;

public class MasterSlaveConfig {
    private Map<String, MyDataSource> dataSources = new HashMap<>();
    private MasterSlaveRule masterSlaveRule;

    public static MasterSlaveConfig unmarshal(File yamlFile) throws IOException {
        try (
                FileInputStream fileInputStream = new FileInputStream(yamlFile);
                InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "UTF-8")
        ) {
            Yaml yaml = new Yaml(new Constructor(MasterSlaveConfig.class));
            MasterSlaveConfig masterSlaveConfig = yaml.loadAs(inputStreamReader, MasterSlaveConfig.class);
            return masterSlaveConfig;
        }
    }

    public Map<String, MyDataSource> getDataSources() {
        return dataSources;
    }
    public void setDataSources(Map<String, MyDataSource> dataSources) {
        this.dataSources = dataSources;
    }
    public MasterSlaveRule getMasterSlaveRule() {
        return masterSlaveRule;
    }
    public void setMasterSlaveRule(MasterSlaveRule masterSlaveRule) {
        this.masterSlaveRule = masterSlaveRule;
    }
}

MasterSlaveRule

package com.qbsea.yamload.config;

import java.util.List;

public class MasterSlaveRule {
    private String name;
    private String masterDataSourceName;
    private List<String> slaveDataSourceNames;
    //set and get method
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getMasterDataSourceName() {
        return masterDataSourceName;
    }

    public void setMasterDataSourceName(String masterDataSourceName) {
        this.masterDataSourceName = masterDataSourceName;
    }

    public List<String> getSlaveDataSourceNames() {
        return slaveDataSourceNames;
    }

    public void setSlaveDataSourceNames(List<String> slaveDataSourceNames) {
        this.slaveDataSourceNames = slaveDataSourceNames;
    }
}

MyDataSource

package com.qbsea.yamload.config;

public class MyDataSource {
    private String driverClassName;
    private String url;
    private String username;
    private String password;

    //set and get
    public String getDriverClassName() {
        return driverClassName;
    }

    public void setDriverClassName(String driverClassName) {
        this.driverClassName = driverClassName;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}