Yaml reads, YamlUtil

The spring container before starting use of spring 1 reads the boot yaml, spring boot 2 reference stackoverflow.com/questions/5… Modify the

package cn.inusha.multi.utils;

import org.springframework.beans.factory.config.YamlPropertiesFactoryBean;
import org.springframework.boot.bind.PropertiesConfigurationFactory;
import org.springframework.core.env.MutablePropertySources;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.env.PropertySources;
import org.springframework.core.env.SystemEnvironmentPropertySource;
import org.springframework.core.io.Resource;
import org.springframework.util.Assert;

import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

/ * * *@author InuYasha
 */
public class YamlUtil {

    public static <T> T readToObj(Resource resource, T target, String prefix) {
        MutablePropertySources propertySources = new MutablePropertySources();
        propertySources.addFirst(new PropertiesPropertySource(resource.getFilename(), readAsProperties(resource)));
        return readToObjFromPropertySources(target, prefix, propertySources);
    }

    public static <T> T readToObjWithSystemProperties(Resource resource, T target, String prefix) {
        MutablePropertySources propertySources = new MutablePropertySources();
        propertySources.addFirst(new PropertiesPropertySource(resource.getFilename(), readAsProperties(resource)));
        Map<String, Object> sources = new HashMap<>();
        System.getProperties().forEach((key, value) -> {
            sources.put(key.toString(), value);
        });
        propertySources.addFirst(new PropertiesPropertySource(resource.getFilename(), readAsProperties(resource)));
        propertySources.addFirst(new SystemEnvironmentPropertySource("systemProperties", sources));
        return readToObjFromPropertySources(target, prefix, propertySources);
    }

    public static <T> T readToObjFromPropertySources(T target, String prefix, PropertySources propertySources) {
        Assert.notNull(target, "target cannot is null");
        Assert.notNull(prefix, "prefix cannot is null");
        Assert.notNull(propertySources, "propertySources cannot is null");
        PropertiesConfigurationFactory<Object> factory = new PropertiesConfigurationFactory<Object>(
                target);
        factory.setPropertySources(propertySources);
        factory.setIgnoreInvalidFields(true);
        factory.setIgnoreUnknownFields(true);
        factory.setIgnoreNestedProperties(false);
        factory.setTargetName(prefix);
        try {
            factory.bindPropertiesToTarget();
        } catch (Exception ex) {
            throw new RuntimeException("Error reading YAML", ex);
        }

        return target;
    }

    public static Properties readAsProperties(Resource resource) {
        YamlPropertiesFactoryBean factory = new YamlPropertiesFactoryBean();
        factory.setResources(resource);
        factory.afterPropertiesSet();
        returnfactory.getObject(); }}Copy the code