Windows11下Vaadin Copilot AI创建LocationView类时JSON解析写入错误排查

在Windows 11系统中测试Vaadin Copilot AI功能（基于Vaadin Flow），执行命令：

Create an empty LocationView class with one button on the screen named 'Test'.

收到错误响应：

Error parsing JSON: Unable to write file - JSON chunk that failed

详细日志信息：

2025-04-02T02:17:19.100+03:00  INFO 32644 --- [ctor-http-nio-7] com.vaadin.copilot.ai.AICommandHandler   : Parsed JSON: StreamResponse[status=VALIDATION, message=Validation finished, exception=, changes={}, code=1]
2025-04-02T02:17:19.757+03:00  INFO 32644 --- [ctor-http-nio-7] com.vaadin.copilot.ai.AICommandHandler   : Parsed JSON: StreamResponse[status=PRE_PROCESS, message=Flow Source modified, exception=, changes={}, code=2]
2025-04-02T02:17:20.478+03:00  INFO 32644 --- [ctor-http-nio-7] com.vaadin.copilot.ai.AICommandHandler   : Parsed JSON: StreamResponse[status=EMBEDDING_CONTEXT, message=Embedding context retrieval finished, exception=, changes={}, code=2]
2025-04-02T02:17:22.617+03:00  INFO 32644 --- [ctor-http-nio-7] com.vaadin.copilot.ai.AICommandHandler   : Parsed JSON: StreamResponse[status=AI_CALL, message=AI call finished, exception=, changes={}, code=2]
2025-04-02T02:17:22.618+03:00  INFO 32644 --- [ctor-http-nio-7] com.vaadin.copilot.ai.AICommandHandler   : Parsed JSON: StreamResponse[status=POST_PROCESS, message=Post-process finished, exception=, changes={src\main\java\ai\example\base\ui\view\LocationView.java=package ai.example.base.ui.view;

import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.router.Route;

@Route("location")
public class LocationView extends VerticalLayout {

    public LocationView() {
        Button testButton = new Button("Test");
        add(testButton);
    }
}
}, code=2]
2025-04-02T02:17:22.619+03:00  INFO 32644 --- [ctor-http-nio-7] com.vaadin.copilot.ai.AICommandHandler   : PostProcess finished
2025-04-02T02:17:22.620+03:00 ERROR 32644 --- [ctor-http-nio-7] com.vaadin.copilot.ai.AICommandHandler   : Error parsing JSON: Unable to write file (src\main\java\ai\example\base\ui\view\LocationView.java) with data from copilot server response - JSON chunk that failed: {"status":"POST_PROCESS","message":"Post-process finished","exception":"","changes":{"src\\main\\java\\ai\\example\\base\\ui\\view\\LocationView.java":"package ai.example.base.ui.view;\n\nimport com.vaadin.flow.component.button.Button;\nimport com.vaadin.flow.component.orderedlayout.VerticalLayout;\nimport com.vaadin.flow.router.Route;\n\n@Route(\"location\")\npublic class LocationView extends VerticalLayout {\n\n    public LocationView() {\n        Button testButton = new Button(\"Test\");\n        add(testButton);\n    }\n}\n"},"code":2}

• 文件路径或权限问题：目标文件路径src\main\java\ai\example\base\ui\view\LocationView.java对应的目录可能未创建，或者当前运行Vaadin Copilot的进程没有该目录的写入权限（比如项目文件夹设为只读、需管理员权限才能写入）。
• JSON转义处理异常：日志显示返回的JSON chunk包含转义后的Windows路径（src\\main\\java\\...）和字符串（@Route(\"location\")），Copilot在处理Windows路径反斜杠转义时可能出现错误，导致JSON解析失败，进而无法写入文件。
• 目标文件被占用：如果LocationView.java已存在且被其他程序（如IDE、文件管理器）锁定，会导致Copilot无法写入该文件。
• 版本兼容性问题：当前使用的Vaadin Copilot版本可能与Windows 11系统或Vaadin Flow版本存在兼容性冲突，导致生成并写入文件的环节出现异常。

内容的提问来源于stack exchange，提问作者alexanoid