Java Operation properties file, support for adding or updating multiple properties

Java Operation properties file, support for new or updated multiple properties one, update or add a single property method

/** * Write Properties information * @param filePath absolute path (including file name and suffix name) * @param parametername name * @param parametervalue value */public static void WriteProperties (String filePath, String parametername, String parametervalue) {Propert       IES props = new Properties ();           try {//If the file does not exist, create a new file File=new file (FilePath);       if (!file.exists ()) {file.createnewfile ();           } InputStream fis = new FileInputStream (FilePath);           Reads the list of attributes (key and element pairs) from the input stream props.load (FIS);           Fis.close ();           OutputStream fos = new FileOutputStream (FilePath);           Props.setproperty (ParameterName, ParameterValue); In a format that is appropriate for loading into the properties table using the Load method,//Writes the attribute list (key and element pairs) in this properties table to the output stream Props.store (FOS, Parametern           AME); Fos.close (); Close stream} catch (IOException e) {System.err.println ("Visit" +filepath+ "for updating" +parametername+ "Value E       Rror "); }   }

Ii. methods for updating or adding n attributes

/** * @Title: Writemultiproperty * @Description: TODO (Modify multiple properties of properties file) * @param filePath Property file path (absolute path) * @param lis   t a column value to update or add * @return void */public static void Writemultiproperty (String filePath, list<pobj> List) {      if (list = = NULL | | list.size () = = 0) return;       Properties Props = new properties ();           try {//If the file does not exist, create a new file File=new file (FilePath);       if (!file.exists ()) {file.createnewfile ();           } InputStream fis = new FileInputStream (FilePath);           Reads the list of attributes (key and element pairs) from the input stream props.load (FIS);           Fis.close ();                      OutputStream fos = new FileOutputStream (FilePath);           Set properties for (Pobj obj:list) {Props.setproperty (Obj.getkey (), Obj.getvalue ());                      }//Save to attribute file Props.store (FOS, "Update Properties"); Fos.close (); Close stream} catch (IOException e) {System.err.println ("ViSit "+filepath+" for updating the PROPERTIES value error "); }   }

Updates or additions to multiple properties require a secondary class that temporarily stores the values that need to be manipulated

/**     * @ClassName: Pobj     * @Description: TODO (helper class, used to pass each property of a property file)     * @author Bruce [email protected]     * @ Date 2014-11-18 pm 11:31:00     */public    static class pobj{        private String key;    private String value;        Public Pobj () {}        /**     * <p>title: </p>     * <p>description: </p>     * @param key< c15/>* @param value     *    /Public Pobj (string key, String value) {    This.key = key;    This.value = value;    }    Public String GetKey () {return key;} public void Setkey (String key) {This.key = key;} Public String GetValue () {return value;} public void SetValue (String value) {this.value = value;}        }

Third, the method of reading the property file

Import Java.io.fileinputstream;import java.io.ioexception;import java.io.inputstream;import java.util.Properties; Import Org.apache.commons.io.ioutils;import Org.slf4j.logger;import Org.slf4j.loggerfactory;public class SETTINGSJNWJ {private static final Logger Logger = Loggerfactory.getlogger (settingsjnwj.class);p rivate static SETTINGSJNWJ instance;public Properties Settings = new Properties ();p ublic settingsjnwj () {String filename = ("d:/jnwj.pr Operties "); Logger.info ("Loading" + filename + "..."); InputStream stream = null;try {stream = new FileInputStream (filename); settings . Load (stream); Logger.info (filename + "loaded");} catch (IOException e) {logger.error ("Failed to" + filename, e);} finally {if (stream! = null) ioutils.closequietly (stream);}} Public synchronized static SETTINGSJNWJ getinstance () {if (instance = = null) {instance = new Settingsjnwj ();} return instance;} public string getString (string key) {return Settings.getproperty (key);} public static void Main (string[] args) {SETTINGSJNWJ s = settingsjnwj.getinstance (); System.out.println (S.settings.tostring ());//system.out.println (Settingsjnwj.getinstance (). getString ("uname"));}}

attached, properties file contents [Jnwj.properties]

uname=wckjupass=wckj123456unitcode=2340958039458

Iv. Testing

/** * @Title: Main * @Description: TODO (here is a word describing the function of this method) * @param @param args setting file * @return void return type * @throws */    public static void Main (string[] args) {//TODO auto-generated method stub//test1 ();    Test2 (); }/** * @Title: Multiple properties added or changed test */public static void Test2 () {list<pobj> List = new arraylist<    Pobj> ();    List.add (New Pobj ("uname", "wckj"));    List.add (New Pobj ("UPass", "wckj123456"));    List.add (New Pobj ("Unitcode", "2340958039458"));        Writemultiproperty ("d:/aiterw/conf/jnwj.properties", list);    System.out.println (Settingsjnwj.getinstance (). settings.tostring ()); }/** * @Title: New or changed test for single attribute */public static void Test1 () {//write file String passwork = "wckj1        23456 "; String JNWJ = Settings.getinstance (). getString ("JNWJ");          Here you can directly write your own property file location, such as: D:/jnwj.properties writeproperties (JNWJ, "UPass", passwork); Remove UserPassword from File, System.out.println (SETTINGSJNwj.getinstance (). getString ("UPass")); }

Reference: http://www.oschina.net/code/snippet_116183_12472#21008

Java Operation properties file, support for adding or updating multiple properties