gson and json

//从文件过去jsonFile file = new File(GsonT.class.getResource("json.sjon").getFile());String s = FileUtils.readFileToString(file);Gson gson = new Gson();Diaosi diaosi = gson.fromJson(s, Diaosi.class);//gson转换日期格式

File file = new File(GsonT.class.getResource("json.sjon").getFile());
String s = FileUtils.readFileToString(file);
Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd").create();
Diaosi diaosi1 = gson.fromJson(s, Diaosi.class);

System.out.println(diaosi1.getBirthDay().toString());
System.out.println(diaosi1.getMajor());
System.out.println(diaosi1.getMajor().getClass());//java.util.Array

System.out.println(diaosi1.getMajor().getClass());//修改diaosi类的major类型为Set.gson会自动转换成java.util.Set

//最基本的json操作JSONObject json = new JSONObject();Object nullObj=null;json.put("name","王小二");//gonsBuilder格式GsonBuilder gb=new GsonBuilder(); ???????gb.setPrettyPrinting(); ???????gb.setFieldNamingStrategy(new FieldNamingStrategy() { ???????????public String translateName(Field field) { ?????????????if(field.getName().equals("name")){ ???????????????return "Name"; ?????????????} ???????????????return field.getName(); ???????????} ???????}); ???????Gson gson1 = gb.create(); ???????System.out.println(gson1.toJson(diaosi));//获取数组jsonarray File file = new File(JsonObjectOne.class.getResource("/j.json").getFile()); ???????String content = FileUtils.readFileToString(file); ???????JSONObject jsonObject = new JSONObject(content); ???????if(!jsonObject.isNull("name")){ ???????} ???????if(!jsonObject.isNull("nickname")){ ???????} ???????JSONArray jsonArray = jsonObject.getJSONArray("major"); ???????for(int i=0;i<jsonArray.length();i++){ ???????????String m=(String)jsonArray.get(i); ???????}