1 import org.apache.commons.configuration.ConfigurationException; 2 import org.apache.commons.configuration.PropertiesConfiguration; 3 4 import com.alibaba.fastjson.JSON; 5 import com.alibaba.fastjson.JSONObject; 6 7 /** 8 * @ClassName: ReadPropertiesUtil 9 */ 10 public class ReadPropertiesUtil { 11 // 声明配置文件 12 private static String[] confProps = { "config.properties" }; 13 private static PropertiesConfiguration conf = null; 14 15 /** 16 * 获取所有配置对象 17 */ 18 public static PropertiesConfiguration getConf() { 19 conf = new PropertiesConfiguration();// 初始化对象 20 /* 把所有props配置文件一次加载,共后续使用 */ 21 for (int i = 0; i < confProps.length; i++) { 22 try { 23 conf.load(confProps[i]); 24 } catch (ConfigurationException e) { 25 conf = null; 26 } 27 } 28 return conf; 29 } 30 31 /* 32 * PropsUtil getInt() 33 */ 34 public static Integer getInt(String key) { 35 /** 声明返回值 **/ 36 Integer value = null; 37 try { 38 /* 获取value值 */ 39 conf = getConf(); 40 value = conf.getInt(key); 41 } catch (Exception e) { 42 } 43 return value; 44 } 45 46 /* 47 * PropsUtil getString() 48 */ 49 public static String getString(String key) { 50 /** 声明返回值 **/ 51 String value = null; 52 try { 53 /* 获取value值 */ 54 conf = getConf(); 55 value = conf.getString(key); 56 } catch (Exception e) { 57 } 58 return value; 59 } 60 61 /* 62 * PropsUtil getLong() 63 */ 64 public static Long getLong(String key) { 65 /** 声明返回值 **/ 66 Long value = null; 67 try { 68 /* 获取value值 */ 69 conf = getConf(); 70 value = conf.getLong(key); 71 } catch (Exception e) { 72 } 73 return value; 74 } 75 76 /* 77 * PropsUtil getBoolean() 78 */ 79 public static boolean getBoolean(String key) { 80 /** 声明返回值 **/ 81 boolean value = true; 82 try { 83 /* 获取value值 */ 84 conf = getConf(); 85 value = conf.getBoolean(key); 86 } catch (Exception e) { 87 value = false; 88 } 89 return value; 90 } 91 92 /* 93 * PropsUtil getList() 94 */ 95 public static String[] getStringArray(String key) { 96 /** 声明返回值 **/ 97 String[] value = null; 98 try { 99 /* 获取value值 */ 100 conf = getConf(); 101 value = conf.getStringArray(key); 102 } catch (Exception e) { 103 } 104 return value; 105 } 106 107 /* 108 * PropsUtil getJsonHeaders() 109 */ 110 public static JSONObject getJsonHeaders(String key) { 111 JSONObject json = null;// 声明返回值 112 try { 113 /** 解析*.Properties文件 **/ 114 conf = getConf(); 115 String value = conf.getString(key).replace("=", ","); 116 json = JSON.parseObject(value); 117 } catch (Exception e) { 118 } 119 return json; 120 } 121 122 public static void main(String[] args) throws Exception { 123 124 System.out.println(getString("dbcp.url")); 125 126 // String[] tmp = getStringArray("Email_to"); 127 // for(String to:tmp){ 128 // System.out.println(to); 129 // } 130 131 // JSONObject json = getJsonHeaders("httpHead"); 132 // for(Entry<String, Object> entry:json.entrySet()){ 133 // System.out.println(entry.getKey() + "-----" + entry.getValue().toString()); 134 // } 135 136 // System.out.println(getInt("dbcp.url")); 137 138 // System.out.println(getInt("redis.minIdle")); 139 // String[] tmp = getStringArray("redis.redisSlaveIp"); 140 // for(int i=0;i<tmp.length;i++){ 141 // System.out.println(tmp[i].split(":")[0]); 142 // System.out.println(tmp[i].split(":")[1]); 143 // } 144 } 145 }
1 //相关依赖 2 <!-- commons-configuration --> 3 <dependency> 4 <groupId>commons-configuration</groupId> 5 <artifactId>commons-configuration</artifactId> 6 <version>1.9</version> 7 </dependency> 8 <!-- fastjson json --> 9 <dependency> 10 <groupId>com.alibaba</groupId> 11 <artifactId>fastjson</artifactId> 12 <version>1.2.7</version> 13 </dependency>
Properties文件载入工具类:
依赖spring等。
1 <dependency> 2 <groupId>org.slf4j</groupId> 3 <artifactId>slf4j-api</artifactId> 4 <version>1.7.7</version> 5 </dependency> 6 <dependency> 7 <groupId>org.slf4j</groupId> 8 <artifactId>slf4j-log4j12</artifactId> 9 <version>1.7.7</version> 10 </dependency>
1 import java.io.IOException; 2 import java.io.InputStream; 3 import java.util.NoSuchElementException; 4 import java.util.Properties; 5 6 import org.apache.commons.io.IOUtils; 7 import org.slf4j.Logger; 8 import org.slf4j.LoggerFactory; 9 import org.springframework.core.io.DefaultResourceLoader; 10 import org.springframework.core.io.Resource; 11 import org.springframework.core.io.ResourceLoader; 12 13 /** 14 * Properties文件载入工具类. 可载入多个properties文件, 15 * 相同的属性在最后载入的文件中的值将会覆盖之前的值，但以System的Property优先. 16 */ 17 public class PropertiesLoader { 18 private static Logger logger = LoggerFactory.getLogger(PropertiesLoader.class); 19 private static ResourceLoader resourceLoader = new DefaultResourceLoader(); 20 private final Properties properties; 21 22 public PropertiesLoader(String... resourcesPaths) { 23 properties = loadProperties(resourcesPaths); 24 } 25 26 public Properties getProperties() { 27 return properties; 28 } 29 30 /** 31 * 取出Boolean类型的Property，但以System的Property优先.如果都为Null抛出异常,如果内容不是true/false则返回false. 32 */ 33 public Boolean getBoolean(String key) { 34 String value = getValue(key); 35 if (value == null) { 36 throw new NoSuchElementException(); 37 } 38 return Boolean.valueOf(value); 39 } 40 41 /** 42 * 取出Boolean类型的Property，但以System的Property优先.如果都为Null则返回Default值,如果内容不为true/false则返回false. 43 */ 44 public Boolean getBoolean(String key, boolean defaultValue) { 45 String value = getValue(key); 46 return value != null ? Boolean.valueOf(value) : defaultValue; 47 } 48 49 /** 50 * 取出Double类型的Property，但以System的Property优先.如果都为Null或内容错误则抛出异常. 51 */ 52 public Double getDouble(String key) { 53 String value = getValue(key); 54 if (value == null) { 55 throw new NoSuchElementException(); 56 } 57 return Double.valueOf(value); 58 } 59 60 /** 61 * 取出Double类型的Property，但以System的Property优先.如果都为Null则返回Default值，如果内容错误则抛出异常 62 */ 63 public Double getDouble(String key, Integer defaultValue) { 64 String value = getValue(key); 65 return value != null ? Double.valueOf(value) : defaultValue; 66 } 67 68 /** 69 * 取出Integer类型的Property，但以System的Property优先.如果都为Null或内容错误则抛出异常. 70 */ 71 public Integer getInteger(String key) { 72 String value = getValue(key); 73 if (value == null) { 74 throw new NoSuchElementException(); 75 } 76 return Integer.valueOf(value); 77 } 78 79 /** 80 * 取出Integer类型的Property，但以System的Property优先.如果都为Null则返回Default值，如果内容错误则抛出异常 81 */ 82 public Integer getInteger(String key, Integer defaultValue) { 83 String value = getValue(key); 84 return value != null ? Integer.valueOf(value) : defaultValue; 85 } 86 87 /** 88 * 取出String类型的Property，但以System的Property优先,如果都为Null则抛出异常. 89 */ 90 public String getProperty(String key) { 91 String value = getValue(key); 92 if (value == null) { 93 throw new NoSuchElementException(); 94 } 95 return value; 96 } 97 98 /** 99 * 取出String类型的Property，但以System的Property优先.如果都为Null则返回Default值. 100 */ 101 public String getProperty(String key, String defaultValue) { 102 String value = getValue(key); 103 return value != null ? value : defaultValue; 104 } 105 106 /** 107 * 取出Property，但以System的Property优先,取不到返回空字符串. 108 */ 109 private String getValue(String key) { 110 String systemProperty = System.getProperty(key); 111 if (systemProperty != null) { 112 return systemProperty; 113 } 114 if (properties.containsKey(key)) { 115 return properties.getProperty(key); 116 } 117 return ""; 118 } 119 120 /** 121 * 载入多个文件, 文件路径使用Spring Resource格式. 122 */ 123 private Properties loadProperties(String... resourcesPaths) { 124 Properties props = new Properties(); 125 for (String location : resourcesPaths) { 126 InputStream is = null; 127 try { 128 Resource resource = resourceLoader.getResource(location); 129 is = resource.getInputStream(); 130 props.load(is); 131 } catch (IOException ex) { 132 logger.info("Could not load properties from path:" + location + ", " + ex.getMessage()); 133 } finally { 134 IOUtils.closeQuietly(is); 135 } 136 } 137 return props; 138 } 139 }