阅读JSON数据到Java对象

Question

我从Excel中使用的Java成JSON数组像这样读取数据：

FileInputStream inp = new FileInputStream("C://temp/testdata.xls"); 
      HSSFWorkbook workbook = new HSSFWorkbook(inp); 

      // Get the first Sheet. 
      Sheet sheet = workbook.getSheetAt(0); 

      //Start constructing JSON. 
      JSONObject json = new JSONObject(); 

      // Iterate through the rows. 
      JSONArray rows = new JSONArray(); 

      for (Iterator<Row> rowsIT = sheet.rowIterator(); rowsIT.hasNext();) 
      { 
       Row row = rowsIT.next(); 
       JSONObject jRow = new JSONObject(); 

       // Iterate through the cells. 
       JSONArray cells = new JSONArray(); 
       for (Iterator<Cell> cellsIT = row.cellIterator(); cellsIT.hasNext();) 
       { 
        Cell cell = cellsIT.next(); 
        cells.put(cell.getStringCellValue()); 
       } 
       jRow.put("cell", cells); 
       rows.put(jRow); 
      } 

      // Create the JSON. 
      json.put("rows", rows); 

      myvalue = json.toString(); 
      System.out.println(myvalue); 

我的excel文件看起来是这样的：

TestCase SearchString PageTitle 
TC1.01   Ferrari   Ferrari - Google Searching 
TC1.02   Toyota   Toyota - Google Searching 
TC1.03   Mazda   Google 
TC1.04   Volvo   Google 

第一行是我的专栏名。

当我打印我的价值观了，我得到这样的：

{"rows":[{"cell":["TestCase","SearchString","PageTitle"]},{"cell":["TC1.01","Ferrari","Ferrari - Google Searching"]},{"cell":["TC1.02","Toyota","Toyota - Google Searching"]},{"cell":["TC1.03","Mazda","Google"]},{"cell":["TC1.04","Volvo","Google"]}]} 

如何映射在Java中的数据列的名字呢？例如：我如何映射与Ferarri的SearchString列？ （等）

将不胜感激:-)

Answer 1

任何帮助，我不认为你可以这样直接与正常的JSON库做。

当您从Excel读取并构建JSON时，尝试分别处理“标题”行。你应该尝试产生一个JSON看起来是这样的：

{"rows":[ 
    { 
     "TestCase"  : "TC1.01", 
     "SearchString" : "Ferrari", 
     "PageTitle"  : "Ferrari - Google Searching"] 
    }, 
    { 
     "TestCase"  : "TC1.02", 
     "SearchString" : "Toyota", 
     "PageTitle"  : "Toyota - Google Searching"] 
    }, 
    { 
     "TestCase"  : "TC1.03", 
     "SearchString" : "Mazda", 
     "PageTitle"  : "Google"] 
    }, 
    { 
     "TestCase"  : "TC1.04", 
     "SearchString" : "Volvo", 
     "PageTitle"  : "Google"] 
    } 
    ] 
} 

（每个数据行成为一个地图，并具有键作为列名）

然后映射这一个POJO应该是微不足道的与任何JSON库。

Answer 2

感谢您的回复。

我最终做了这样的工作对我来说。

import org.apache.poi.hssf.usermodel.HSSFRow; 
import org.apache.poi.hssf.usermodel.HSSFSheet; 
import org.apache.poi.hssf.usermodel.HSSFWorkbook; 
import org.json.JSONException; 
import org.json.JSONObject; 
import org.junit.Before; 
import org.junit.Test; 
import java.io.FileInputStream; 
import java.io.IOException; 
import org.openqa.selenium.By; 
import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.WebElement; 
import org.openqa.selenium.chrome.ChromeDriver; 

public class Excel_Example { 

    @Before 
    public void setup(){   
     System.setProperty("webdriver.chrome.driver", "C://temp/chromedriver/chromedriver.exe"); 
    } 

    @Test 
    public void test() throws JSONException { 

     try { 
     // Open the Excel file 
      FileInputStream fis = new FileInputStream("C://temp/testdata.xls"); 
      // Access the required test data sheet 
      HSSFWorkbook wb = new HSSFWorkbook(fis); 
      HSSFSheet sheet = wb.getSheet("testdata"); 
      // Loop through all rows in the sheet 
      // Start at row 1 as row 0 is our header row 
      for(int count = 1;count<=sheet.getLastRowNum();count++){ 
       HSSFRow row = sheet.getRow(count); 
       System.out.println("Running test case " + row.getCell(0).toString()); 

       //Start constructing JSON. 
       JSONObject json = new JSONObject(); 
       json.put("SearchString", row.getCell(1).toString()); 
       json.put("PageTitle", row.getCell(2).toString());     

       // Run the test for the current test data row 
       runTest(json.getString("SearchString").toString(),json.getString("PageTitle").toString()); 

      } 
      fis.close(); 
     } catch (IOException e) { 
      System.out.println("Test data file not found"); 
     }          

}

public static void runTest(String strSearchString, String strPageTitle) { 

     // Start a browser driver and navigate to Google 
     WebDriver driver = new ChromeDriver(); 
     driver.get("http://www.google.com"); 

     // Enter the search string and send it 
     WebElement element = driver.findElement(By.name("q")); 
     element.sendKeys(strSearchString); 
     element.submit(); 

     // Check the title of the page 
     if (driver.getTitle().equals(strPageTitle)) { 
      System.out.println("Page title is " + strPageTitle + ", as expected"); 
     } else { 
      System.out.println("Expected page title was " + strPageTitle + ", but was " + driver.getTitle() + " instead"); 
     } 

     //Close the browser 
     driver.quit(); 
} 
}