java如何读取文件内容和解析Json格式数据方式

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java读取文件内容,解析Json格式数据

一、读取txt文件内容(Json格式数据)

public static String reader(String filePath) {        try {            File file = new File(filePath);            if (file.isFile() && file.exists()) {                InputStreamReader read = new InputStreamReader(new FileInputStream(file), "UTF-8");                BufferedReader bufferedReader = new BufferedReader(read);                String lineTxt = bufferedReader.readLine();                while (lineTxt != null) {                    return lineTxt;                }            }        } catch (UnsupportedEncodingException | FileNotFoundException e) {            System.out.println("Cannot find the file specified!");            e.printStackTrace();        } catch (IOException e) {            System.out.println("Error reading file content!");            e.printStackTrace();        }        return null;    }

二、解析处理Json格式数据

private static void process(String txtStr) {        JSONObject json = JSONObject.fromObject(txtStr);        JSONArray datas = json.getJSONObject("data").getJSONArray("rows");        List> list = new ArrayList<>();        for (int i = 0; i < datas.length(); i++) {            Map map = new HashMap<>();            JSONObject obj = datas.getJSONObject(i).getJSONObject("cells");            String name = obj.getString("weibo_name");            String code = obj.getString("weibo_id");            String url = BASE_URL + obj.getString("url");            map.put("name", name);            map.put("code", code);            map.put("url", url);            list.add(map);        }        if (!list.isEmpty()) {            insert(list);        }    }

三、结果存入数据库

private static void insert(List> list) {        for (Map map : list) {            //遍历数据，写存储方法        }    }

四、测试

public static void main(String[] args) {        String filePath = "E:\\wugang\\data\\weiboyi\\wechat.txt";        String txtStr = reader(filePath);        if (txtStr != null) {            process(txtStr);        } else {            System.out.println("Read the content is empty!");        }        System.out.println("--- end ---");    }

java 读取txt文件中的json数据，进行导出

txt文件中的内容如下

以下代码可直接运行

package com.hwt.count.test;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStreamReader;import java.util.ArrayList;import java.util.List;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFCellStyle;import org.apache.poi.hssf.usermodel.HSSFFont;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.hssf.util.CellRangeAddress;import org.apache.poi.hssf.util.HSSFColor;import net.sf.json.JSONObject;public class Testaa {    public static void main(String[] args) {        try {            String path = "C:/Users/dell/Desktop/test.txt";            File file = new File(path);            InputStreamReader isr = new InputStreamReader(new FileInputStream(file),"GBK");            BufferedReader br = new BufferedReader(isr);            String content = br.readLine() ;            br.close();            isr.close();            content = content.substring(2, content.length()-2);            content = content.replace("},{", ";");            String[] arrContent = content.split(";");                        //设置列头名称和表体数据            String[] rowsName = new String[]{"code_type","code","name"};            List dataList = new ArrayList();                        for(String arrc : arrContent){                JSONObject jsonObj = JSONObject.fromObject("{"+arrc+"}");                String code = jsonObj.getString("code");                String name = jsonObj.getString("name");                Object[] obj = new Object[rowsName.length];                obj[0] = "TYPE";                obj[1] = code;                obj[2] = name;                dataList.add(obj);            }            //设置列头名称和表体数据            HSSFWorkbook workbook = setWorkBookDate(dataList,rowsName);            try {                // 将workbook对象输出到文件test.xls                FileOutputStream fos = new FileOutputStream("C:/Users/dell/Desktop/test.xls");                workbook.write(fos);                fos.flush(); // 缓冲                fos.close(); // 关闭流            }catch (Exception e1) {                e1.printStackTrace();            }        } catch (Exception e) {            e.printStackTrace();        }    }    private static HSSFWorkbook setWorkBookDate(List  dataList,String[] rowsName){                //创建工作簿对象        HSSFWorkbook workbook = new HSSFWorkbook();        //创建工作表，设置当前页名称        HSSFSheet sheet = workbook.createSheet("测试");        //设置默认行高        sheet.setDefaultRowHeight((short)350);        //合并表头表尾的单元格        /*sheet.addMergedRegion(new CellRangeAddress(0, 2, 0, 3));        sheet.addMergedRegion(new CellRangeAddress(3, 3, 0, 3));        //冻结行        workbook.getSheetAt(0).createFreezePane(0, 4);        RegionUtil.setBorderBottom(1, new CellRangeAddress(3, 3, 0, 3), workbook.getSheetAt(0), workbook);//设置边框*/        // 获取表头样式对象        // 获取表体样式对象        HSSFCellStyle style = getCommonStyle(workbook);                // 定义所需列数        int columnNum = rowsName.length;        //创建列头        HSSFRow rowHead = sheet.createRow(0);          for(int n = 0;n < columnNum;n++){            HSSFCell cellRow = rowHead.createCell(n,HSSFCell.CELL_TYPE_STRING);//创建列头对应个数的单元格                            cellRow.setCellValue(rowsName[n]);//设置列头单元格的值                                    cellRow.setCellStyle(style);//设置列头单元格样式                                }                //将查询出的数据设置到sheet对应的单元格中        for(int i=0;i
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