代码初始化

vetti-common/src/main/java/com/vetti/common/handle/JsonTypeHandler.java

@@ -0,0 +1,60 @@
+package com.vetti.common.handle;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.ibatis.type.BaseTypeHandler;
+import org.apache.ibatis.type.JdbcType;
+
+import java.sql.CallableStatement;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+/**
+ * @author ID
+ * @date 2025/9/15 9:32
+ */
+public class JsonTypeHandler<T> extends BaseTypeHandler<T> {
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+    private final Class<T> type;
+
+    public JsonTypeHandler(Class<T> type) {
+        this.type = type;
+    }
+
+    @Override
+    public void setNonNullParameter(PreparedStatement ps, int i, T parameter, JdbcType jdbcType) throws SQLException {
+        try {
+            ps.setString(i, objectMapper.writeValueAsString(parameter));
+        } catch (JsonProcessingException e) {
+            throw new SQLException("Failed to convert object to JSON", e);
+        }
+    }
+
+    @Override
+    public T getNullableResult(ResultSet rs, String columnName) throws SQLException {
+        String json = rs.getString(columnName);
+        return parseJson(json);
+    }
+
+    @Override
+    public T getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
+        String json = rs.getString(columnIndex);
+        return parseJson(json);
+    }
+
+    @Override
+    public T getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
+        String json = cs.getString(columnIndex);
+        return parseJson(json);
+    }
+
+    private T parseJson(String json) throws SQLException {
+        if (json == null) return null;
+        try {
+            return objectMapper.readValue(json, type);
+        } catch (JsonProcessingException e) {
+            throw new SQLException("Failed to parse JSON", e);
+        }
+    }
+}