问题描述
我有这个字符串
clean()
如何从该字符串中清除反斜杠并将实体放入数据结构中?
解决方法
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
public class SOTest {
public static void main(String[] args) throws JsonMappingException,JsonProcessingException,JSONException {
ObjectMapper mapper = new ObjectMapper();
String jsonString = "[{\"name\":\"john\",\"family\":[],\"status\":\"single\"},{\"name\":\"david\",\"status\":\"marred\"}]";
List<CustomClass> datas = mapper.readValue(jsonString,new TypeReference<List<CustomClass>>() {});
System.out.println(datas);
}
}
class CustomClass {
public String name;
public List<CustomClass> family;
public String status;
@Override
public String toString() {
return "Data [name=" + name + ",family=" + family + ",status=" + status + "]";
}
}
输出
[Data [name=john,family=[],status=single],Data [name=david,status=marred]]
,
该字符串看起来还可以。转义已完成,以在Java中使用字符串。
使用Jackson之类的库。为您的任务。
用jshell控制台编写,因此您需要根据需要添加类等
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
try {
String json = "[{\"name\":\"john\",\"status\":\"marred\"}]";
json = json.replace("\\\"","\"");
System.out.println(json);
ObjectMapper mapper = new ObjectMapper();
Person[] persons = mapper.readValue(json,Person[].class);
System.out.println(persons[0].name);
} catch (IOException e) {
e.printStackTrace();
}
static class Person {
public final String name;
public final String[] family;
public final String status;
@JsonCreator
public Person(
@JsonProperty("name") String name,@JsonProperty("family") String[] family,@JsonProperty("status") String status
) {
this.name = name;
this.family = family;
this.status = status;
}
}