java 順序 讀寫 Properties 設定檔

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java 順序 讀寫 Properties 設定檔 支援中文 不亂碼

java 順序 讀寫 Properties 設定檔 ，java預設提供的Properties API 繼承hashmap ，不是順序讀寫的。

特從網上查資料，順序讀寫的代碼，如下，

import java.util.Collections;import java.util.Enumeration;import java.util.LinkedHashSet;import java.util.Properties;import java.util.Set;public class OrderedProperties extends Properties {    private static final long serialVersionUID = -4627607243846121965L;    private final LinkedHashSet<Object> keys = new LinkedHashSet<Object>();    public Enumeration<Object> keys() {        return Collections.<Object> enumeration(keys);    }    public Object put(Object key, Object value) {        keys.add(key);        return super.put(key, value);    }        public synchronized Object remove(Object key) {        keys.remove(key);        return super.remove(key);    }    public Set<Object> keySet() {        return keys;    }    public Set<String> stringPropertyNames() {        Set<String> set = new LinkedHashSet<String>();        for (Object key : this.keys) {            set.add((String) key);        }        return set;    }}

import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.util.Properties;public class PropertiesTest {    public static void main(String[] args) {        String readfile = "D:/eclipseworkspace/test/src/test.txt";        Properties pro = readPropertiesFileObj(readfile); // 讀取properties檔案        System.out.println(pro.getProperty("password0.9271224287974811"));        pro.remove("password0.008229652622303574");        writePropertiesFileObj(readfile, pro); // 寫properties檔案    }    // 讀取資源檔,並處理中文亂碼    public static Properties readPropertiesFileObj(String filename) {        Properties properties = new OrderedProperties();        try {            InputStream inputStream = new FileInputStream(filename);            BufferedReader bf = new BufferedReader(new InputStreamReader(inputStream, "utf-8"));            properties.load(bf);            inputStream.close(); // 關閉流        } catch (IOException e) {            e.printStackTrace();        }        return properties;    }    // 寫資源檔，含中文    public static void writePropertiesFileObj(String filename, Properties properties) {        if (properties == null) {            properties = new OrderedProperties();        }        try {            OutputStream outputStream = new FileOutputStream(filename);            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(outputStream, "utf-8"));            properties.setProperty("username" + Math.random(), "myname");            properties.setProperty("password" + Math.random(), "mypassword");            properties.setProperty("chinese" + Math.random(), "中文");            properties.store(bw, null);            outputStream.close();        } catch (IOException e) {            e.printStackTrace();        }    }}

java 順序 讀寫 Properties 設定檔