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开发BUG | “Type definition error: [simple type, class com.example.mall.pojo.User];

快乐小码农 2022-03-11 阅读 96

今天用postman测试接口的时候遇到了这个错误

"Type definition error: [simple type, class com.example.mall.pojo.User]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.example.mall.pojo.User` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)\n at [Source: (PushbackInputStream); line: 2, column: 5]",

排查结果:实体类中当定义了有参构造、又没有补充上无参构造的情况

{
    "username":"admin2",
    "password":"1234",
    "email":"hzcdd@qq.com"
}
    public User(String username, String password, String email, Integer role) {
        this.username = username;
        this.password = password;
        this.email = email;
        this.role = role;
    }

    public User() {
    }
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