Question

我有一个从mp获得的arraylist如下，

ArrayList<String> aList = (ArrayList<String>) jsonMap.get("govIds");

arraylist的大小为1，其内容为fooles，

[{govId=023402094, govIdType=TEST}]

如何使用govId = 023402094作为一个字符串对象并将govIdType = TEST作为另一个字符串对象，将arraylist的大小设为2。

或如何使[{govId = 023402094，govIdType = TEST}]作为键（String）-value（String）（再次是一个map）对。

由于

Answer 1

试试这个：

    //here is the test data
    String s="[{govId=023402094, govIdType=TEST}]";
    List<String> aList =new ArrayList<String>();
    aList.add(s);
    //end of test data

    //Here is what you need begins   
    String text=aList.get(0).replaceAll("[\\[\\]\\{\\}]", "");// remove the char "{","}","[" and "]"
    //now the text is :govId=023402094, govIdType=TEST

    String[] values=text.split(",");
    List resultList=new ArrayList<String>();//Convert to another list, you can if you want to change a little to change into a map
    for(String value:values){
        resultList.add(value);
    }

   //test the result
    System.out.println(resultList);//[govId=023402094,  govIdType=TEST]

如果您的字符串格式看起来像JSON {key1：value，key2：value2};您可以使用Gson轻松将其更改为地图：

public static void main(String[] args){
    String s="[{govId:023402094, govIdType:TEST}]";// something like this
    String text=s.replaceAll("[\\[\\]]", "");// remove the char "[" and "]" to make it like as JSON format

    Map<String,String> map=toMapUsingGSON(text));

}

private static Map<String,String> toMapUsingGSON(String json){
    Type mapType = new TypeToken<Map<String, String>>(){}.getType();  
    return new Gson().fromJson(json, mapType);
}

来自Map的Java Splitting Arraylist

1 个答案: