在JSON中，{}可以映射为Java Map，并且[]可以映射为Java List。
因此，要实现以下JSON格式，
{
"results": [ {
"address_components": [ {
"long_name": "1600",
"short_name": "1600"
}, {
"long_name": "Amphitheatre Pkwy",
"short_name": "Amphitheatre Pkwy"
}, {
"long_name": "Mountain View",
"short_name": "Mountain View"
}, {
"long_name": "California",
"short_name": "CA"
}, {
"long_name": "United States",
"short_name": "US"
}, {
"long_name": "94043",
"short_name": "94043"
} ]
} ]
}
你需要（ 深呼吸 ）Map<String, List<Map<String, List<Map<String, String>>>>>。
List<Map<String, String>> addressComponents = new ArrayList<Map<String, String>>();
Map<String, String> addressComponent1 = new HashMap<String, String>();
addressComponent1.put("long_name", "1600");
addressComponent1.put("short_name", "1600");
addressComponents.add(addressComponent1);
Map<String, String> addressComponent2 = new HashMap<String, String>();
addressComponent2.put("long_name", "Amphitheatre Pkwy");
addressComponent2.put("short_name", "Amphitheatre Pkwy");
addressComponents.add(addressComponent2);
// ...
List<Map<String, List<Map<String, String>>>> results = new ArrayList<Map<String, List<Map<String, String>>>>();
Map<String, List<Map<String, String>>> result1 = new HashMap<String, List<Map<String,String>>>();
result1.put("address_components", addressComponents);
results.add(result1);
// ...
Map<String, List<Map<String, List<Map<String, String>>>>> god = new HashMap<String, List<Map<String,List<Map<String,String>>>>>();
god.put("results", results);
String json = new Gson().toJson(god);
System.out.println(json); // There!
更好的是只使用完全有价值的Javabeans代替Map<String, String>。
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