【修改】 生成json提示被占用问题

src/main/java/com/example/exam/exam/service/autoForWinEdgeSetting/AutoForWinEdgeSettingServiceImpl.java

@@ -19,9 +19,7 @@ import jakarta.annotation.Resource;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
-import java.io.File;
+import java.io.*;
-import java.io.FileInputStream;
-import java.io.IOException;
 import java.math.BigDecimal;
 import java.util.*;
 
@@ -274,25 +272,30 @@ public class AutoForWinEdgeSettingServiceImpl implements AutoForWinEdgeSettingSe
         File file = new File(filePath);
 
         try {
-            // 如果文件存在且文件不为空，尝试读取现有内容
+            Map<String, String> existingMap = new HashMap<>();
-            Map<String, String> existingMap = null;
+
             if (file.exists() && file.length() > 0) {
-                existingMap = objectMapper.readValue(file, Map.class);
+                try (InputStream fis = new FileInputStream(file)) {
+                    existingMap = objectMapper.readValue(fis, Map.class);
+                }
             }
 
-            // 如果文件为空或无法读取，初始化为空的Map
-            if (existingMap == null) {
-                existingMap = new HashMap<>();
-            }
-
-            // 合并新的Map数据
             existingMap.putAll(map);
 
-            // 将合并后的Map写入到文件
+            try (OutputStream fos = new FileOutputStream(file, false);
-            objectMapper.writeValue(file, existingMap);
+                 BufferedOutputStream bos = new BufferedOutputStream(fos)) {
+                objectMapper.writeValue(bos, existingMap);
+                bos.flush();  // 强制刷新
+            }
+
+            // 可选占用测试
+            boolean released = file.renameTo(file);
+            System.out.println("文件释放状态: " + released);
+
         } catch (IOException e) {
             e.printStackTrace();
         }
+
         return "学生答案已经写入到 " + filePath;
     }
 

src/main/java/com/example/exam/exam/service/autoforchoice/AutoForChoiceServiceImpl.java

@@ -12,13 +12,12 @@ import com.example.exam.exam.service.tenant.SystemTenantService;
 import com.example.exam.exam.utils.c.LogFileUtils;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectWriter;
 import jakarta.annotation.Resource;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
-import java.io.File;
+import java.io.*;
-import java.io.FileInputStream;
-import java.io.IOException;
 import java.math.BigDecimal;
 import java.util.*;
 
@@ -282,29 +281,35 @@ public class AutoForChoiceServiceImpl implements AutoForChoiceService {
         File file = new File(filePath);
 
         try {
-            // 如果文件存在且文件不为空，尝试读取现有内容
+            Map<String, String> existingMap = new HashMap<>();
-            Map<String, String> existingMap = null;
+
             if (file.exists() && file.length() > 0) {
-                existingMap = objectMapper.readValue(file, Map.class);
+                try (InputStream fis = new FileInputStream(file)) {
+                    existingMap = objectMapper.readValue(fis, Map.class);
+                }
             }
 
-            // 如果文件为空或无法读取，初始化为空的Map
-            if (existingMap == null) {
-                existingMap = new HashMap<>();
-            }
-
-            // 合并新的Map数据
             existingMap.putAll(map);
 
-            // 将合并后的Map写入到文件
+            try (OutputStream fos = new FileOutputStream(file, false);
-            objectMapper.writeValue(file, existingMap);
+                 BufferedOutputStream bos = new BufferedOutputStream(fos)) {
+                objectMapper.writeValue(bos, existingMap);
+                bos.flush();  // 强制刷新
+            }
+
+            // 可选占用测试
+            boolean released = file.renameTo(file);
+            System.out.println("文件释放状态: " + released);
+
         } catch (IOException e) {
             e.printStackTrace();
         }
+
         return "学生答案已经写入到 " + filePath;
     }
 
 
+
     public static String convertToLetter(int number) {
         // 判断是否在 1 到 26 的范围内
         if (number >= 1 && number <= 26) {

src/main/java/com/example/exam/exam/utils/c/LogFileUtils.java

@@ -29,14 +29,18 @@ public class LogFileUtils {
                 file.getParentFile().mkdirs(); // 创建父目录
                 file.createNewFile();
             }
-            writer = new BufferedWriter(new FileWriter(file, true)); // 追加写入模式
+
+            try (BufferedWriter writer = new BufferedWriter(new FileWriter(file, true))) {
+                writer.write(""); // 可选写入内容
+            }
+
         } catch (IOException e) {
-            log.error(e.getMessage());
+            throw new RuntimeException("无法创建日志文件: " + e.getMessage(), e);
-            throw new RuntimeException("无法创建日志文件: " + e.getMessage());
         }
     }
 
 
+
     /**
      * 写入文本，自动换行
      * @param content 写入的文本