java读取Properties文件的方法

resource.properties的内容：

com.tsinkai.ettp.name=imooc

com.tsinkai.ettp.website=www.imooc.com

com.tsinkai.ettp.language=java

1、使用java.util.Properties的load(InputStream inStream)方法。

先读取文件生成inputStream流，再用load加载。

    @Test

    public void testReadProperties3() throws IOException {

        Properties properties = new Properties();

//        InputStream inputStream = this.getClass().getResourceAsStream("/resource.properties");

//        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("resource.properties");

        Resource resource = new ClassPathResource("resource.properties");

        InputStream inputStream = resource.getInputStream();

        properties.load(inputStream);

        System.out.println(properties.getProperty("com.tsinkai.ettp.name"));

    }

2、使用org.springframework.core.io.support.PropertiesLoaderUtils;

    @Test

    public void testReadProperties() throws IOException {

        Properties properties = PropertiesLoaderUtils.loadAllProperties("resource.properties");

        String name = properties.getProperty("com.tsinkai.ettp.name");

        System.out.println(name);

    }

3、使用java.util.ResourceBundle;

    @Test

    public void testReadProperties2() throws IOException {

        ResourceBundle resourceBundle = ResourceBundle.getBundle("resource");

        String name = resourceBundle.getString("com.tsinkai.ettp.name");

        System.out.println(name);

    }

4、使用spring注解创建资源类

资源类：

package com.imooc.pojo;

import org.springframework.boot.context.properties.ConfigurationProperties;

import org.springframework.context.annotation.Configuration;

import org.springframework.context.annotation.PropertySource;

@Configuration

@ConfigurationProperties(prefix="com.imooc.opensource")//属性前缀

@PropertySource(value="classpath:resource.properties")//文件路径

public class Resource {

    private String name;

    private String website;

    private String language;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getWebsite() {

        return website;

    }

    public void setWebsite(String website) {

        this.website = website;

    }

    public String getLanguage() {

        return language;

    }

    public void setLanguage(String language) {

        this.language = language;

    }

}

调用：

package com.tsinkai.ettp;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.BeanUtils;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.test.context.SpringBootTest;

import org.springframework.test.context.junit4.SpringRunner;

import com.tsinkai.ettp.common.Resource;

@RunWith(SpringRunner.class)

@SpringBootTest

public class EttpCustomApplicationTests {

    @Autowired

    Resource customResource;

    @Test

    public void readResource() {

        Resource bean = new Resource();

        BeanUtils.copyProperties(customResource, bean);

        System.out.println(bean.getName());

    }

}

巴特西

java读取Properties文件的方法

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