工具類-把對象轉爲字符串導出爲json文件

把對象轉爲字符串導出爲json文件

根據前段傳值獲取數據對象，轉成String，然後就可以在瀏覽器上面導出json或者TXT文件，備導入數據使用。

public class OpExportFileUtil {

    private static final Logger LOGGER = LoggerFactory.getLogger(OpExportFileUtil.class);

    private HttpServletResponse response;
    private HttpServletRequest request;

    // 文件名
    private String fileName = "export";
    //文件保存路徑
    private String fileDir;
    //sheet名
    private String sheetName = "sheet1";
    //備註內容
    private String titleRemark;
    //必填項設置列表
    private List<Integer> mandatoryTitle;
    //表頭字體
    private String titleFontType = "Arial Unicode MS";
    //表頭字號
    private short titleFontSize = 12;
    //正文字體
    private String contentFontType = "Arial Unicode MS";
    //正文字號
    private short contentFontSize = 12;
    //首行備註字體
    private String titleRemarkFontType = "宋體";
    //首行備註字號
    private short titleRemarkFontSize = 18;
    //首行備註高度
    private short titleRemarkCellHeight = 18;
    //首行備註寬度（列號，從0起）
    private short titleRemarkEndColNum = 12;
    //是否需要序號列
    private boolean needSequenceColumn = true;
    //是否需要首行備註
    private boolean needTitleRemark = false;
    //是否需要標註必填項
    private boolean needMandatoryTitle = false;
    //說明的背景顏色
    private Short titleRemarkBackGroundColorIndex = null;
    //標題的北京顏色
    private Short headerBackGroundColorIndex = null;

    private XSSFWorkbook workbook = null;

    // 導出的格式均爲文本 added by wentian 2018/4/9
    private boolean isCellStylePureString = false;

    //模板中是否需要下拉框，只適用於數量較小的情況
    private boolean isNeedDropDownBox = false;
    private int maxDropDownRowShowSize = 50000;  //能展示下拉框的最大行數
    private List<String[]> dropDownDatas;  //下拉框的數據
    private int[] dropDownColNums; //下拉框對應的列下標
    private boolean titleRemarkBold = true;

    public OpExportFileUtil setIsCellStylePureString(boolean flag) {
        this.isCellStylePureString = flag;
        return this;
    }


    public OpExportFileUtil(String fileDir, String sheetName) {
        this.fileDir = fileDir;
        this.sheetName = sheetName;
        workbook = new XSSFWorkbook();
    }

    public OpExportFileUtil(HttpServletResponse response, String fileName) {
        this.response = response;
        this.fileName = fileName;
    }

    /**
     * 設置表頭字體.
     *
     * @param titleFontType
     */
    public OpExportFileUtil setTitleFontType(String titleFontType) {
        this.titleFontType = titleFontType;
        return this;
    }

    public OpExportFileUtil setTitleRemarkColorIndex(Short index) {
        this.titleRemarkBackGroundColorIndex = index;
        return this;
    }

    public OpExportFileUtil setHeaderColorIndex(Short index) {
        this.headerBackGroundColorIndex = index;
        return this;
    }

    public OpExportFileUtil setNeedSequenceColumn(boolean needSequenceColumn) {
        this.needSequenceColumn = needSequenceColumn;
        return this;
    }

    public OpExportFileUtil setNeedTitleRemark(boolean needTitleRemark) {
        this.needTitleRemark = needTitleRemark;
        return this;
    }

    public OpExportFileUtil setNeedMandatoryTitle(boolean needMandatoryTitle) {
        this.needMandatoryTitle = needMandatoryTitle;
        return this;
    }

    public OpExportFileUtil setTitleRemarkBold(boolean titleRemarkBold) {
        this.titleRemarkBold = titleRemarkBold;
        return this;
    }


    /**
     * 設置表頭字體大小.
     *
     * @param titleFontSize
     */
    public OpExportFileUtil setTitleFontSize(short titleFontSize) {
        this.titleFontSize = titleFontSize;
        return this;
    }

    /**
     * 設置正文字體.
     *
     * @param contentFontType
     */
    public OpExportFileUtil setContentFontType(String contentFontType) {
        this.contentFontType = contentFontType;
        return this;
    }

    /**
     * 設置正文字號.
     *
     * @param contentFontSize
     */
    public OpExportFileUtil setContentFontSize(short contentFontSize) {
        this.contentFontSize = contentFontSize;
        return this;
    }

    /**
     * 設置首行備註信息
     *
     */
    public OpExportFileUtil setTitleRemark(String titleRemark, short titleRemarkFontSize, short titleRemarkCellHeight) {
        this.titleRemark = titleRemark;
        this.titleRemarkFontSize = titleRemarkFontSize;
        this.titleRemarkCellHeight = titleRemarkCellHeight;
        return this;
    }


    /**
     * 設置首行備註信息
     *
     */
    public OpExportFileUtil setTitleRemark(String titleRemark, short titleRemarkFontSize, short titleRemarkCellHeight, short remarkEndColNum) {
        this.titleRemark = titleRemark;
        this.titleRemarkFontSize = titleRemarkFontSize;
        this.titleRemarkCellHeight = titleRemarkCellHeight;
        this.titleRemarkEndColNum = remarkEndColNum;
        return this;
    }


    public OpExportFileUtil setMandatoryTitle(List<Integer> mandatoryTitle) {
        this.mandatoryTitle = mandatoryTitle;
        return this;
    }


    public OpExportFileUtil setDropDownBoxData(List<String[]> dropDownDatas, int[] dropDownColNums) {
        this.dropDownDatas = dropDownDatas;
        this.dropDownColNums = dropDownColNums;
        if (null != dropDownDatas && dropDownDatas.size() > 0 && null != dropDownColNums
                && dropDownColNums.length > 0) {
            this.isNeedDropDownBox = true;
        }
        return this;
    }

    /**
     * 數據導出爲json文件
     * @param exportContentStr
     */
    public void writeOpExportFileJson(String exportContentStr) {
        try (OutputStream out = getOutputStream();) {
            // ByteArrayOutputStream excelStream = buildExcel(propertyNames, titleName, false, columnSizes, dataList);
            out.write(exportContentStr.getBytes());
            out.flush();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    private OutputStream getOutputStream() throws IOException {
        if (fileDir != null) {
            // 保存文件
            return new FileOutputStream(fileDir);
        } else {
            // 從response中獲取輸出流
            buildResponse();
            return response.getOutputStream();
        }
    }

    private void buildResponse() throws UnsupportedEncodingException {
        // 設置文件返回類型
        fileName = fileName + ".json";
        response.setContentType("application/msexcel");

        // 默認處理
        response.setHeader("Content-Disposition",
                "attachment; filename=" + URLEncoder.encode(fileName, "UTF-8").replaceAll("\\+", "%20"));

        if (null == request) {
            return;
        }

        String Agent = request.getHeader("User-Agent");
        if (null != Agent && (Agent.toLowerCase().indexOf("firefox") != -1)) {
            //對火狐做特殊處理
            response.setHeader("Content-Disposition",
                    String.format("attachment;filename*=utf-8'zh_cn'%s", URLEncoder.encode(fileName, "utf-8")));
        }
    }

    public void writeTXT(String path, String title, String content, HttpServletResponse response) {
        try {
            // 防止文件建立或讀取失敗，用catch捕捉錯誤並打印，也可以throw
            /* 寫入Txt文件 */
            File writename = new File(path);// 相對路徑，如果沒有則要建立一個新的output。txt文件
            if (!writename.exists()) {
                writename.mkdirs();
            }
            writename = new File(path + "\\" + title);// 相對路徑，如果沒有則要建立一個新的output。txt文件
            writename.createNewFile(); // 創建新文件
            BufferedWriter out = new BufferedWriter(new FileWriter(writename));
            out.write(content); // \r\n即爲換行
            out.flush(); // 把緩存區內容壓入文件
            out.close(); // 最後記得關閉文件
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

 

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