Spring 配置解析之Properties

SpringBoot中的的配置简单属性类支持ConfigurationProperties方式，看一个简单的示例。

 1 @ConfigurationProperties(prefix = "org.dragonfei.demo")
 2 public class DemoProperties {
 3     private String name;
 4     private String password;
 5     private String test;
 6
 7     public String getName() {
 8         return name;
 9     }
10
11     public void setName(String name) {
12         this.name = name;
13     }
14
15     public String getPassword() {
16         return password;
17     }
18
19     public void setPassword(String password) {
20         this.password = password;
21     }
22
23     public String getTest() {
24         return test;
25     }
26
27     public void setTest(String test) {
28         this.test = test;
29     }
30
31     @Override
32     public String toString() {
33         return "DemoProperties{" +
34                 "name=‘" + name + ‘\‘‘ +
35                 ", password=‘" + password + ‘\‘‘ +
36                 ", test=‘" + test + ‘\‘‘ +
37                 ‘}‘;
38     }
39 }

定义Properties类

1 org.dragonfei.demo.name=dragonfei
2 org.dragonfei.demo.password=password
3 org.dragonfei.demo.test=test

添加配置

1 @Configuration
2 @EnableConfigurationProperties({DemoProperties.class})
3 public class DemoConfiguration {
4 }

注入Properties

 1 @RunWith(SpringJUnit4ClassRunner.class)
 2 @SpringApplicationConfiguration(classes = DemoConfiguration.class)
 3 @EnableAutoConfiguration
 4 public class DemoPropertiesTest {
 5
 6     @Autowired
 7     private DemoProperties properties;
 8     @Test
 9     public void testProperties(){
10         System.out.println(properties.toString());
11     }
12 }

简单单元测试

1 DemoProperties{name=‘dragonfei‘, password=‘password‘, test=‘test‘}

运行单元测试结果

DemoProperties神奇的注入到Spring容器中了。有没有跟我一样很兴奋，这样的 一大好处，将配置文件的属性以类的形式展现，在需要使用的时候只需要，autowire需要的类就可以了，避免大片重复的的${a.b.c}