.claim()A JSONObject text must begin with '{' at character 12 of
时间: 2024-02-27 19:34:29 浏览: 122
the string
This error occurs when trying to parse a JSON string that does not begin with a '{' character at the expected position. The error message indicates that the issue is at character 12 of the string, which suggests that the string may have some invalid characters or formatting before the expected '{' character.
To resolve this error, you should check the JSON string for any formatting errors or invalid characters. Make sure that the string begins with a '{' character and that all opening and closing brackets are properly matched. You can also use a JSON validator or parser tool to help identify any issues with the JSON string.
相关问题
mRegistMains = mRegistMains.stream().collect(Collectors.collectingAndThen(Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(MRegistMain::getRegistno))), ArrayList::new)); 这块代码提示报错2023-07-10 18:31:36.078,ERROR,,[https-jsse-nio-26025-exec-10],[o.a.c.c.C.[.[.[.[dispatcherServlet]],Servlet.service() for servlet [dispatcherServlet] in context with path [/hisportal-server] threw exception [Request processing failed; nested exception is java.lang.ClassCastException: class [Ljava.lang.Object; cannot be cast to class ins.db.po.claim.MRegistMain ([Ljava.lang.Object; is in module java.base of loader 'bootstrap'; ins.db.po.claim.MRegistMain is in unnamed module of loader org.springframework.boot.loader.LaunchedURLClassLoader @6767c1fc)] with root cause java.lang.ClassCastException: class [Ljava.lang.Object; cannot be cast to class ins.db.po.claim.MRegistMain ([Ljava.lang.Object; is in module java.base of loader 'bootstrap'; ins.db.po.claim.MRegistMain is in unnamed module of loader org.springframework.boot.loader.LaunchedURLClassLoader @6767c1fc) 我该怎么改正这段代码
根据报错信息,看起来在使用 `Collectors.collectingAndThen()` 方法时,出现了将数组对象 `[Ljava.lang.Object;` 转换为 `MRegistMain` 的错误。这通常是由于查询结果集返回的类型不正确导致的。
您可以尝试使用 `Stream.map()` 方法来显式地将数组对象转换为 `MRegistMain` 对象。以下是修改后的代码示例:
```java
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.TreeSet;
import java.util.stream.Collectors;
// ...
List<MRegistMain> mRegistMains = mPolicyMainDao.getRegistMainList(aggreeNo, name, identifyNo);
if (mRegistMains != null && !mRegistMains.isEmpty()) {
List<MRegistMain> sortedAndDistinctMRegistMains = mRegistMains.stream()
.map(obj -> (MRegistMain) obj) // 将数组对象转换为 MRegistMain 对象
.collect(Collectors.collectingAndThen(Collectors.toCollection(() ->
new TreeSet<>(Comparator.comparing(MRegistMain::getRegistno))), ArrayList::new));
// sortedAndDistinctMRegistMains 即为去重且按照 getRegistno 属性排序后的列表
log.info("官网历史理赔查询结果集:: {}", sortedAndDistinctMRegistMains);
} else {
// 处理结果集为空的情况
}
```
通过在 `map()` 方法中进行类型转换,将数组对象转换为 `MRegistMain` 对象。然后再进行去重和排序操作。
请注意,这只是一个示例代码片段,具体实现可能需要根据您的业务逻辑进行调整。希望能帮到您!如果您还有任何问题,请随时提问。
Jwts.builder().claim
JWT(JSON Web Tokens)是一种开放标准的安全令牌协议,常用于身份验证和授权。在使用JWTS(Java JWT)库构建JWT时,`.builder()`方法是一个静态工厂方法,它返回一个`JwtBuilder`对象,可以用来构造JWT的各个部分。
`.claim()`方法是`JwtBuilder`的一部分,用于添加声明(claims)到JWT头(header)或有效载荷(payload)。声明是一组键值对,它们包含了关于用户信息、权限或其他应用特定的数据。常见的claim有:
- `sub`: 用户标识(subject)
- `iat`: 签发时间(issued at)
- `exp`: 过期时间(expiration time)
- `aud`: 接受者(audience)
- `scope`: 权限范围
例如,以下代码展示了如何添加一些基本的claim:
```java
String secret = "your-secret-key";
Map<String, Object> claims = new HashMap<>();
claims.put("username", "john.doe");
claims.put("email", "john.doe@example.com");
Jwt签发者 builder = Jwts.builder()
.setClaims(claims)
.setSubject(claims.get("username"))
.signWith(SignatureAlgorithm.HS512, secret);
String jwt = builder.compact();
```
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