的ArrayList <HashMap中<字符串，字符串>>爲String []

Question

我在

ArrayList<HashMap<String,String>> 

從我的web服務獲取的數據現在我想把上述的每個對象轉換爲

String[] 

如何我是否這樣做？ 任何幫助將不勝感激！

Answer 1

嘗試

ArrayList<HashMap<String, String>> test = new ArrayList<HashMap<String, String>>(); 
HashMap<String, String> n = new HashMap<String, String>(); 
n.put("a", "a"); 
n.put("b", "b"); 
test.add(n); 

HashMap<String, String> m = test.get(0);//it will get the first HashMap Stored in array list 

String strArr[] = new String[m.size()]; 
int i = 0; 
for (HashMap<String, String> hash : test) { 
    for (String current : hash.values()) { 
     strArr[i] = current; 
     i++; 
    } 
} 

Answer 2

HashMap的用途應該是HashValues的索引，以便更快地找到值。我不知道爲什麼你有重點和值作爲字符串，但如果你只需要值，你可以做這樣的：

ArrayList<HashMap<String, String>> test = new ArrayList<>(); 
String sum = ""; 
for (HashMap<String, String> hash : test) { 
    for (String current : hash.values()) { 
     sum = sum + current + "<#>"; 
    } 
} 
String[] arr = sum.split("<#>"); 

這不是一個很好的方式，但要求不是太;）

Answer 3

ArrayList<HashMap<String, String>> meterList = controller.getMeter(); 

HashMap<String, String> mtiti = meterList.get(0);//it will get the first HashMap Stored in array list 

String[] strMeter = new String[mtiti.size()]; 

String meter = ""; 
for (HashMap<String, String> hash : meterList) { 
    for (String current : hash.values()) { 
     meter = meter + current + "<#>"; 
    } 
} 
String[] arr = meter.split("<#>");