php链接oracle乱码，尝试把一个php的项目转成java，

最近有个新需求，OA上的考勤信息确认，开始的时候搞了个php的版本，莫名其妙的数据库会乱码（oracle）(等有时间再写一篇php链接oracle数据库）折腾了将近一个周，乱码莫名其妙的出现，代码啥也不动，多请求两遍又正常了。准备搞个java来替换php，在gpt的协助下，搞成了。上代码

连接数据库：

private static final String DB_URL = "jdbc:oracle:thin:@**.**.**.**:1521:***";private static final String DB_USER = "****";private static final String DB_PASSWORD = "****";

发起网络请求，，获取数据：

//使用OkHttp发起网络请求
OkHttpClient client = new OkHttpClient().newBuilder().connectTimeout(300, TimeUnit.SECONDS).readTimeout(300, TimeUnit.SECONDS).build();MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");RequestBody body = RequestBody.create(mediaType, "***=**&****=**&*****=**&*****="+******);Request request = new Request.Builder().url("http://******/***/**/*************").method("POST", body).addHeader("Content-Type", "application/x-www-form-urlencoded").addHeader("Cookie", "****************************").build();Response response = client.newCall(request).execute();

处理数据考勤数据：

  // json化数据ObjectMapper objectMapper = new ObjectMapper();Map<String, Object> data = objectMapper.readValue(responseBody, Map.class);JsonArray resultArray = new JsonArray();//定义一个json  取data中data的值for (Map<String, Object> employee : (List<Map<String, Object>>) data.get("data")) {// 计算日期Calendar calendar = Calendar.getInstance();calendar.add(Calendar.MONTH, -1);calendar.set(Calendar.DAY_OF_MONTH, 1);Date firstDayOfPreviousMonth = calendar.getTime();calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));Date lastDayOfPreviousMonth = calendar.getTime();JsonObject employeeData = new JsonObject();// 给employeeData绑定值employeeData.addProperty("*****", (String) employee.get("****"));employeeData.addProperty("****", (String) employee.get("*****"));employeeData.addProperty("*****", (String) employee.get("****"));employeeData.addProperty("****", (String) employee.get("*****"));****************JsonArray attendanceDetailsArray = new JsonArray();calendar.setTime(firstDayOfPreviousMonth);//处理考勤信息json 获取需要的数据 1-31  格式{"Date":16,"Text":"√"}while (firstDayOfPreviousMonth.compareTo(lastDayOfPreviousMonth) <= 0) {// 考勤信息原始的date数据格式在这里SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");String fullDateKey = dateFormat.format(firstDayOfPreviousMonth);int dayKey = calendar.get(Calendar.DAY_OF_MONTH);JsonObject attendanceDetails = new JsonObject();//是否包含指定的键值if (employee.containsKey(fullDateKey)) {String attendanceText = (String) ((Map<String, Object>) employee.get(fullDateKey)).get("text");attendanceDetails.addProperty("Date", dayKey);attendanceDetails.addProperty("Text", attendanceText);} else {attendanceDetails.addProperty("Date", dayKey);attendanceDetails.addProperty("Text", "");}// 赋值给attendanceDetailsArrayattendanceDetailsArray.add(attendanceDetails);// 清除天数calendar.add(Calendar.DAY_OF_MONTH, 1);firstDayOfPreviousMonth = calendar.getTime();}//处理完成的考勤数据 [{Date=1.0, Text=√}, {Date=2.0, Text=√}, {Date=3.0, Text=年假 年假}, {Date=4.0, Text=休息}, {Date=5.0, Text=√}, {Date=6.0, Text=事假 事假}, {Date=7.0, Text=√}, {Date=8.0, Text=√}, {Date=9.0, Text=√}, {Date=10.0, Text=事假 事假}, {Date=11.0, Text=√}, {Date=12.0, Text=√}, {Date=13.0, Text=√}, {Date=14.0, Text=√}, {Date=15.0, Text=√}, {Date=16.0, Text=√}, {Date=17.0, Text=年假 年假}, {Date=18.0, Text=休息}, {Date=19.0, Text=√}, {Date=20.0, Text=√}, {Date=21.0, Text=事假 事假}, {Date=22.0, Text=√}, {Date=23.0, Text=√}, {Date=24.0, Text=√}, {Date=25.0, Text=√}, {Date=26.0, Text=休息}, {Date=27.0, Text=年假 年假}, {Date=28.0, Text=√}, {Date=29.0, Text=√}, {Date=30.0, Text=√}]employeeData.add("attendanceDetails", attendanceDetailsArray);resultArray.add(employeeData);}//打印jsonString看一下数据是否完整String jsonString = new Gson().toJson(resultArray);System.out.println("new"+jsonString);

创建数据库链接，更新数据：

   try (Connection connection = DriverManager.getConnection(DB_URL, DB_USER, DB_PASSWORD)) {// 根据id查询一下主表的idString selectSql = "SELECT id FROM (SELECT id FROM " + formName + " WHERE ********= ? ORDER BY id DESC) WHERE ROWNUM = 1";try (PreparedStatement selectStatement = connection.prepareStatement(selectSql)) {selectStatement.setString(1, requestId);try (ResultSet resultSet = selectStatement.executeQuery()) {if (resultSet.next()) {//获取的json  考勤信息System.out.println("123789"+resultSet);//查询的主表的id更新附表时要用哪个int mainId = resultSet.getInt("id");System.out.println("mainId");System.out.println(mainId);//拼接sqlString updateSql = "UPDATE " + formName + "_dt1 " +"SET ***= ?, bymqts = ?, *** = ?, kqs = ?, ***= ?, ***= ?, ****= ?, ****= ?, " +"****= ?, ****= ?, ****= ?, ****= ?, ****= ?, ****= ?, ****= ?, *****= ?, ****= ?,                         ****= ?, *****= ?"; for (int i = 1; i <= 31; i++) {String columnName = getColumnName(i);updateSql += ", " + columnName + " = CASE WHEN ? = " + i + " THEN ? ELSE " + columnName + " END";}updateSql += " WHERE ****= ? AND ****= ?";try (PreparedStatement updateStatement = connection.prepareStatement(updateSql)) {System.out.println("  System.out.println(resultArray);"+resultArray);List<Map<String, Object>> resultJson = new Gson().fromJson(resultArray, new TypeToken<List<Map<String, Object>>>() {}.getType());for (Map<String, Object> employee : resultJson) {// Set parameters for the prepared statementupdateStatement.setString(1, (String) employee.get("****"));updateStatement.setString(2, (String) employee.get("****"));updateStatement.setString(3, (String) employee.get("****"));updateStatement.setString(4, (String) employee.get("****"));updateStatement.setString(5, (String) employee.get("****"));updateStatement.setString(6, (String) employee.get("****"));List<Map<String, Object>> attendanceDetails = (List<Map<String, Object>>) employee.get("attendanceDetails");//日期类型 必须要用linkedHashMap 不然1会到15后面导致15号之前的更新不成功Map<Double, String> attendanceMap = new LinkedHashMap<>();for (Map<String, Object> record : attendanceDetails) {Double date = (Double) record.get("Date");String text = (String) record.get("Text");attendanceMap.put(date, text);}System.out.println("    System.out.println(attendanceMap1);");System.out.println(attendanceMap);// 补全缺失的日期  都到31号for (double i = 1; i <= 31; i++) {if (!attendanceMap.containsKey(i)) {attendanceMap.put(i, "");}}System.out.println("    System.out.println(attendanceMap2);");System.out.println(attendanceMap);int parameterIndex = 20;// 打印结果for (Map.Entry<Double, String> entry : attendanceMap.entrySet()) {Object dateValue = entry.getKey();Object textValue = entry.getValue();String dateString;if (dateValue instanceof Double) {dateString = String.valueOf(((Double) dateValue).intValue());} else {dateString = (String) dateValue;}updateStatement.setString(parameterIndex++, dateString);updateStatement.setString(parameterIndex++, (String) textValue);System.out.println("Date: " + entry.getKey() + ", Text: " + entry.getValue());}updateStatement.setString(parameterIndex++, String.valueOf(*****));updateStatement.setString(parameterIndex++, (String) employee.get("*****"));System.out.println("Executing SQL statement: " + updateStatement.toString());String generatedSql = buildGeneratedSql(updateSql, resultJson.get(0));          }return "{\"status\": \"0\", \"message\": \"SUCCESS\", \"data\": \"\"}";}}}}} catch (SQLException e) {e.printStackTrace(); // Handle the exception based on your application's requirements}