在Spring MVC控制器上接收JSON并反序列化为对象列表
问题内容：
我的代码如下：
控制者
@RequestMapping(value="/setTest", method=RequestMethod.POST, consumes="application/json")
public @ResponseBody ModelMap setTest(@RequestBody List<TestS> refunds, ModelMap map) {
for(TestS r : refunds) {
System.out.println(r.getName());
}
// other codes
}
TestS pojo
public class TestS implements Serializable {
private String name;
private String age;
//getter setter
}
杰森的要求
var z = '[{"name":"1","age":"2"},{"name":"1","age":"3"}]';
$.ajax({
url: "/setTest",
data: z,
type: "POST",
dataType:"json",
contentType:'application/json'
});
出现此错误
java.lang.ClassCastException：无法将java.util.LinkedHashMap强制转换为com.air.cidb.entities.TestS
我正在使用 Spring 3.1.2 和 Jackson 2.0.4
编辑： 我想在我的控制器方法中接收TestS对象的列表，并对其进行处理。我找不到发送错误的json或方法签名错误的信息。
问题答案：
这是对我有用的代码。关键是您需要一个包装器类。
public class Person {
private String name;
private Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Person [name=" + name + ", age=" + age + "]";
}
PersonWrapper类
public class PersonWrapper {
private List<Person> persons;
/**
* @return the persons
*/
public List<Person> getPersons() {
return persons;
}
/**
* @param persons the persons to set
*/
public void setPersons(List<Person> persons) {
this.persons = persons;
}
}
我的控制器方法
@RequestMapping(value="person", method=RequestMethod.POST,consumes="application/json",produces="application/json")
@ResponseBody
public List<String> savePerson(@RequestBody PersonWrapper wrapper) {
List<String> response = new ArrayList<String>();
for (Person person: wrapper.getPersons()){
personService.save(person);
response.add("Saved person: " + person.toString());
}
return response;
}
发送的请求是POST中的json
{"persons":[{"name":"shail1","age":"2"},{"name":"shail2","age":"3"}]}
回应是
["Saved person: Person [name=shail1, age=2]","Saved person: Person [name=shail2, age=3]"]
