java判断字符串双引号中是否有值

Question

{"name":"","position":"","info":"","nick":""}
如这样的字符串，要怎么判断他中间是没有值的

Answer 1

引入hutool和gson（用于解析json数据）

 <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>5.3.0</version>
</dependency>
<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.7</version>
</dependency>

public class Entity{
  private String name;
  private String position;
  private String nick;
  private String info;
  //getter setter
}

public class ElevenTest{
  public static void main(String[] args){
    String str = "{\"name\":\"\",\"position\":\"\",\"info\":\"\",\"nick\":\"\"}";
    Entity entity = new Gson().fromJson(str,Entity.class);
    if(StrUtil.isBlank(entity.getName())){
      System.out.println("name属性为空");
    }
    //其他属性同上
  }


}