@requestMapping的produces和consumes属性:
produces:它的作用是指定返回值类型,不但可以设置返回值类型还可以设定返回值的字符编码;
consumes: 指定处理请求的提交内容类型(Content-Type),例如application/json, text/html;
前端请求json转换成Bean对象报错的解决:
@RequestMapping(value = "???", consumes = "application/json;charset=utf-8")
JSON.parseObject : 将Json字符串转化为相应的对象(fastjson)
String jsonString = "{name:'Antony',age:'12',sex:'male',telephone:'88888'}";
Staff staff = JSON.parseObject(jsonString, Staff.class);
JSON.toJSONString : 将对象转化为Json字符串(fastjson)
String jsonStr = JSON.toJSONString(staff);
java 对象列表转换为json对象数组,并转为字符串(json-lib)
JSONArray array = JSONArray.fromObject(userlist);
String jsonstr = array.toString();
java对象转换成json对象,并转化为字符串(json-lib)
JSONObject object = JSONObject.fromObject(invite);
String str=object.toString());
JSON字符串转换为JAVA 对象数组(json-lib)
String personstr = getRequest().getParameter("persons");
JSONArray json = JSONArray.fromObject(personstr);
List<InvoidPerson> persons = (List<InvoidPerson>)JSONArray.toCollection(json, nvoidPerson.class);
JSON字符串转换为JAVA 对象(json-lib)
JSONObject jsonobject = JSONObject.fromObject(str);
PassportLendsEntity passportlends = null;
try {
//获取一个json数组
JSONArray array = jsonobject.getJSONArray("passports");
//将json数组 转换成 List<PassPortForLendsEntity>泛型
List<PassPortForLendsEntity> list = new ArrayList<PassPortForLendsEntity>();
for (int i = 0; i < array.size(); i++) {
JSONObject object = (JSONObject)array.get(i);
PassPortForLendsEntity passport = (PassPortForLendsEntity)JSONObject.toBean(object,
PassPortForLendsEntity.class);
if(passport != null){
list.add(passport);
}
}
//转换PassportLendsEntity 实体类
passportlends = (PassportLendsEntity)JSONObject.toBean(jsonobject, PassportLendsEntity.class);
str = "{\"lendperson\":\"李四\",\"lendcompany\":\"有限公司\",\"checkperson\":\"李四\",
\"lenddate\":\"2010-07-19T00:00:00\",\"lendcounts\":4,\"
passports\":[{\"passportid\":\"d\",\"name\":\"李豫川\",\"passporttype\":\"K\"},
{\"passportid\":\"K9051\",\"name\":\"李平\",\"passporttype\":\"K\"},
{\"passportid\":\"K90517\",\"name\":\"袁寒梅\",\"passporttype\":\"K\"},
{\"passportid\":\"K905199\",\"name\":\"贺明\",\"passporttype\":\"K\"}]}";