ajax请求
参考：https://blog.csdn.net/lutinghuan/article/details/46820023
http://jxd-zxf.iteye.com/blog/2072300
1、json 字符串转数组或集合
格式：
[{"jsonContent":"1","url":"http://127.0.0.1:8080/upload/image/201806/c9b59521-9d91-4bb7-bc86-be6d67c114e6.jpg"},{"jsonContent":"2","url":"http://127.0.0.1:8080/upload/image/201806/b487619e-28bc-4ffe-8d65-5e553f6ff799.jpg"},{"jsonContent":"","url":""},"url":""}]
JSONArray jsonarray = JSONArray.fromObject(invitation.getContent());
List collection = (List) jsonarray.toCollection(jsonarray,InvitationFromJson.class);
例子1：将表单对象序列化成Json字符串提交
var formArray = editForm.serializeArray();
var detailFom = detailgrid.datagrid("getData").rows;
var mainForm = {};
for (var i=0; i<formArray.length; i++) {
mainForm[formArray[i].name] = formArray[i].value;
}
var detailDate = {};//json对象
detailDate.entity = mainForm;//主表
detailDate.ivfDs = detailFom;//明细
var detailDateStr = JSON.stringify(detailDate);//转json字符串
$.ajax({
url:"/ivf/incubator/save",
type: ‘post‘,
dataType: ‘json‘,
contentType: "application/json; charset=utf-8",
data:detailDateStr,//json字符串
success: function(data){
if(data.result=="sucess"){
$.messager.alert(‘提示信息:‘,‘保存成功‘,‘info‘,function(){
});
}else{
$.messager.alert(‘提示信息:‘,data.message,‘error‘);
}
});
参考：https://blog.csdn.net/lishuangzhe7047/article/details/28880009
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例子2：后台list接收json字符串，自动封装实体
$(document).ready(function(){
var saveDataAry=[];
var data1={"userName":"test","address":"gz"};
var data2={"userName":"ququ","address":"gr"};
saveDataAry.push(data1);
saveDataAry.push(data2);
$.ajax({
type:"POST",
url:"user/saveUser",
dataType:"json",
contentType:"application/json",
data:JSON.stringify(saveDataAry),
success:function(data){
});
});
@RequestMapping(value = "saveUser",method = {RequestMethod.POST }})
@ResponseBody
public void saveUser(@RequestBody List<User> users) {
userService.batchSave(users);
}
2、json字符串转java对象
首先将json字符串转换为json对象，然后再解析json对象，过程如下。
JSONObject jsonObject = JSONObject.fromObject(jsonStr);
根据json中的键得到它的值
String name = jsonObject.getString("name");
int num = jsonObject.getInt("num");
String sex = jsonObject.getString("sex");
int age = jsonObject.getInt("age");
将json对象转换为java对象
Person jb = (Person)JSONObject.toBean(obj,Person.class);//将建json对象转换为Person对象
3、将java对象转换为json字符串
先将java对象转换为json对象，在将json对象转换为json字符串
JSONObject json = JSONObject.fromObject(obj);//将java对象转换为json对象
String str = json.toString();//将json对象转换为字符串
参考：https://blog.csdn.net/gchb9527/article/details/8688279
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汇总：JSON 字符串 与 java 对象的转换
1. 把java 对象列表转换为json对象数组，并转为字符串 JSONArray array = JSONArray.fromObject(list); String jsonstr = array.toString();2. 把java对象转换成json对象，并转化为字符串 JSONObject object = JSONObject.fromObject(user); Log4jInit.ysulogger.debug(object.toString());3.把JSON字符串转换为JAVA 对象数组 JSONArray json = JSONArray.fromObject(userStr);//userStr是json字符串 List<User> users= (List<User>)JSONArray.toCollection(json,User.class);4.把JSON字符串转换为JAVA 对象 JSONObject jsonobject = JSONObject.fromObject(jsonStr); User user= (User)JSONObject.toBean(object,User.class);
