Spring @PropertySource Read Resource file

The configuration of files that need to read the resource files often appears in the project

spring3.1 start to open @ @PropertySource annotations, you can quickly read to the resource file, with the use of environment can quickly read to the required data.

Added a jar package to spring in the Pom configuration file

<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/maven-v4_0_0.xsd" >
<modelVersion>4.0.0</modelVersion>
<groupId>zky</groupId>
<artifactId>hello</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>hello Maven webapp</name>
<url>http://maven.apache.org</url>
<properties>
<spring.version>4.2.4.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
<type>jar</type>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
<type>jar</type>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>hello</finalName>
</build>

</project>

Add Properties Resource Profile

Disc.title=just Test Properties
Disc.context=i want to study

Add service file

Package com.music.service;

Import org.springframework.stereotype.Component;

@Component
public class Compactdiscserviceimpl implements compactdiscservice{

Public String name= "Hello";

public void Play () {
System.out.println ("Hello I go to study" +math.random ());

}

Public Compactdiscserviceimpl () {
}

Public Compactdiscserviceimpl (String title,string desc) {

System.out.println (title+ "%%%%%" +desc);
}

}

Add Project Config file config

Package com.music;

Import org.springframework.beans.factory.annotation.Autowired;
Import Org.springframework.context.annotation.Bean;
Import Org.springframework.context.annotation.ComponentScan;
Import org.springframework.context.annotation.Configuration;
Import Org.springframework.context.annotation.PropertySource;
Import org.springframework.core.env.Environment;

Import Com.music.service.CompactDiscServiceImpl;
@Configuration
@ComponentScan
@PropertySource (value = {"Classpath:/pro/app.properties"})
public class Musicconfig {
@Autowired
Environment env;
@Bean
Public Compactdiscserviceimpl GetDesc () {
return new Compactdiscserviceimpl (Env.getproperty ("Disc.title"), Env.getproperty ("Disc.desc"));

}

}

The properties file is read in by @propertysource (value = {"Classpath:/pro/app.properties"}). With

@Autowired
Environment env;

Env.getproperty ("Disc.title") can read the contents of the resource file in a timely manner.

If you need a pattern with a placeholder (${"Disc.title"}) you need to inject

@Bean
public static Propertysourcesplaceholderconfigurer Propertysourcesplaceholderconfigurer () {
return new Propertysourcesplaceholderconfigurer ();
}

To test

Package music;

Import static org.junit.Assert.assertNotNull;

Import Org.junit.Test;
Import Org.junit.runner.RunWith;
Import org.springframework.beans.factory.annotation.Autowired;
Import org.springframework.test.context.ContextConfiguration;
Import Org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

Import Com.music.MusicConfig;
Import Com.music.service.CompactDiscService;
Import Com.music.service.CompactDiscServiceImpl;

@RunWith (Springjunit4classrunner.class)
@ContextConfiguration (Classes=musicconfig.class)
public class Musictest {
/* @Autowired
Private Compactdiscservice musicservice;*/
@Autowired
Private Compactdiscserviceimpl Compactdiscserviceimpl;

@Test
public void name () {
Compactdiscserviceimpl.play ();
Musicservice.play ();
Assertnotnull (Musicservice);
}
}

Spring @PropertySource Read resource file