java類讀取properties裏內容

首先新建properties文件

 1 public class Properties {
 2     
 3 
 4     //定義配置文件名稱
 5     public static final String PROPFILENAME_PROJECT = "config.properties";
 6 
 7     //pdf
 8     public static final String URL_PDFIMAGELOG = "url.pdfImageLogo";
 9     public static final String URL_CREATEPDF = "url.toCreatePdf";
10     public static final String URL_PDFFILE = "url.pdfFile";
11 
12     /**
13      * 根據配置文件名和key值獲取value
14      * @param fileName
15      * @param key
16      * @return
17      * @throws Exception
18      */
19     public static String getValue(String fileName, String key) throws Exception {
20         return ReadPropertiesUtil.getValue(fileName, key);
21     }
22     /**
23     * @Description: 經過key從資源文件讀取內容，並格式化
24     * @return String    返回類型 
25     * @author dongye 
26     * @date 2016年6月12日 下午2:16:12 
27     * @throws
28      */
29     public static String getValue(String fileName, String key, Object[] objs) throws Exception{
30         String pattern = getValue(fileName, key);
31         String value = MessageFormat.format(pattern, objs);
32         return value;
33     }
34 
35     //默認調用project.properties配置文件
36     public static String getValue(String key) throws Exception {
37         return ReadPropertiesUtil.getValue(PROPFILENAME_PROJECT, key);
38     }
39 
40 }

public class ReadPropertiesUtil {
    
    private static String propFilePath = "";
    private static Map<String, Object> configMap = new HashMap<String, Object>();
    
    public static void loadConfig(String propFilePath) throws Exception {
        if(PubMethod.isEmpty(configMap) || !configMap.containsKey(propFilePath)){
            Properties config = new Properties();
            config.load(ReadPropertiesUtil.class.getResourceAsStream(propFilePath));
            configMap.put(propFilePath, config);
        }
    }
    
    /**
     * 經過配置文件key值，獲取對應配置值
     * @param key
     * @return
     * @throws Exception
     */
    public static String getValue(String filename,String key) throws Exception {
        Properties config;
        if (!PubMethod.isEmpty(configMap) && configMap.containsKey("/" + filename)) {
            config = (Properties) configMap.get("/" + filename);
            return config.getProperty(key).trim();
        }else {
            loadConfig("/" + filename);
            config = (Properties) configMap.get("/" + filename);
            return config.getProperty(key).trim();
        }
    }
    
}