java中读取properties中的值

方法一:

InputStream in = getClass().getResourceAsStream("/config.properties");
Properties properties = new Properties();
properties.load(in);
String citys = properties.getProperty("属性");

方法二:

Spring中config属性文件的读取与使用 PropertyPlaceholderConfigurer 注解@Component

1.配置文件：/WEB-INF/configInfo.properties
配置文件内容：
email.host = www.baidu.com
email.port = 8080
email.username = root
email.password = root
email.sendFrom = [email protected]

2.Spring容器启动时，使用内置bean对属性文件信息进行加载，在bean.xml中添加如下：

1. 1. /WEB-INF/configInfo.properties

3.其它bean中引用,例：

1. ${email.host}

1. ${email.port}

4.JAVA代码中获取方法：创建ConfigInfo.java
@Component(“configInfo”)
public class ConfigInfo {

1. @Value(“${email.host}”)
2. private String host;
3. @Value(“${email.port}”)
4. private String port;
6. public String getHost() {
   1. return host;
7. }
8. public String getPort() {
   1. return port;
9. }

}

5.代码中调用处
@Autowired
private ConfigInfo configInfo;
public byte[] Test(HttpServletResponse response) {

1. string host = configInfo.getHost();

}

.......