fastJson的四种常用方法
JSON 转 POJO public static <T> T getObject(String pojo, Class<T> tclass) {return JSONObject.parseObject(pojo, tclass);}POJO 转 JSON public static <T> String getJson(T tResponse){return JSONObject.toJSONString(tResponse); }List<T> 转 json public static <T> String listToJson(List<T> ts) {return JSON.toJSONString(ts); }json 转 List<T>public static <T> List<T> jsonToList(String jsonString, Class<T> clazz) {return JSONArray.parseArray(jsonString, clazz); }
fastjson自定义序列化?自测json字符串的小代码
String s1 ="{'a':1,'b':2}"; String s2 ="{'a':3,'b':4}"; List s = new ArrayList<String>(); s.add(s1); s.add(s2); JSONArray list = new JSONArray(s); System.out.println(list.toJSONString()); String res = list.toJSONString(); List<String> sts = JSONArray.parseArray(res,String.class); for (String string : sts) {System.out.println(string); }
关于对json数组进行自定义排序
js排序的几种方式。实体类:TestAA
public class TestAA {private String a;private String b;public TestAA() {super();}public String getA() {return a;}public void setA(String a) {this.a = a;}public String getB() {return b;}public void setB(String b) {this.b = b;}public TestAA(String a, String b) {super();this.a = a;this.b = b;}@Overridepublic String toString() {return "TestAA [a=" + a + ", b=" + b + "]";}}
进行自定义排序的代码
TestAA a1 = new TestAA("1", "2"); TestAA a2 = new TestAA("3", "2"); List s = new ArrayList<TestAA>(); s.add(a1); s.add(a2); JSONArray list = new JSONArray(s); System.out.println(list.toJSONString()); String res = list.toJSONString(); List<TestAA> sts = JSONArray.parseArray(res,TestAA.class);
//从大到小进行排序 Collections.sort(sts, new Comparator<TestAA>() {public int compare(TestAA o1,TestAA o2) {return Integer.parseInt(o2.getA())-Integer.parseInt(o1.getA());}; }); for (TestAA a : sts) {System.out.println(a.toString()); }
json排序。