json使用

Jscript中json的使用

Json 对象的格式

content=content+

"{"+"\"title\":\""+$("#title"+i).val()+"\",\"choiceList\":"+ch oiceList+"},";

content = content.substring(0,content.length-1);

将Json对象转化为Json串

content=JSON.stringify(content);

var last=obj.toJSONString(); //将JSON对象转化为JSON字符

或者

var last=JSON.stringify(obj); //将JSON对象转化为JSON字符

将json串转化为 json 对象

var content= { "name": "cxh", "sex": "man" };

var obj = jQuery.parseJSON(content);

var obj = JSON.parse(content); //由JSON字符串转换为JSON对象

var obj = content.parseJSON(); //由JSON字符串转换为JSON对象

在json对象拼接时。嵌套的是json串

{

"answer": "A",

"name": "11张三丰他创建了太极拳，是道教武当派内家拳的祖师爷。",

"points": "1",

"questionNo": "1",

"questionId": "1",

"questionTypeId": "3",

"content": "{\"title\":\"11张三丰他创建了太极拳，是道教武当派内的祖师爷。\",

\"choiceList\":

[{\"option\":\"A\" ,

\"answer\":\"正确\"},

{\"option\":\"B\" ,\"answer\":\"错误\"}]}"

}]

Json在java中的使用

将javalist对象转化为json对象

List questioncontentlist = new ArrayList(); ObjectMapper mapper = new ObjectMapper();

ObjectWriter writer1 = mapper.viewWriter(Question.class);

String json2 = writer1.writeValueAsString(questioncontentlist);

将json串转化为java对象

JavaType javaType = mapper.getTypeFactory().

constructParametricType(ArrayList.class, Question.class);

long jackStart = System.currentTimeMillis();

List questionList = (List)mapper.readValue(paper.getContent(), javaType);

QuestionContent qc = new QuestionContent();

ObjectWriter writer = mapper.viewWriter(QuestionContent.class); String json1 = writer.writeValueAsString(qc);

Student[] stus = new Student[5];

List stuList = new ArrayList();

for (int i = 0; i < stus.length; i++) {

stus[i] = new Student();

stus[i].setAge(i*10+8);

stus[i].setName("zhang"+i);

stus[i].setSex("male");

//添加到list,一会儿用

stuList.add(stus[i]);

}

JSONArray jsonArray = JSONArray.fromObject(stus);

是对象时：

JSONObject jsonObject = JSONObject.fromObject(student);

// ObjectMapper mapper = new ObjectMapper();

// try {

// JavaType javaType =

mapper.getTypeFactory().constructParametricType(ArrayList.clas s, Uhoem3DRoom.class);

// Uhoem3DRoomlist = (List)

mapper.readValue(result1, javaType);

//// model.addAttribute("DRoom",Uhoem3DRoom);//相

关户型的样板间

// }catch (Exception e){ // e.printStackTrace(); // }