由于好久没来这里了,发现有几个朋友想要代码参考一下,所以上传到这里,感兴趣的朋友可以下来参考 

https://files.cnblogs.com/hjzhang/data.rar

 

在实现DataTable的基本功能后,我们对我们实现的对象进行一下测试,测试代码如下:

   1:  import java.util.List;
   2:  import org.junit.After;
   3:  import org.junit.Assert;
   4:  import org.junit.Before;
   5:  import org.junit.Test;
   6:   
   7:   
   8:  /**  
   9:       * 此类描述的是:  测试数据表对象DataTable对象相关功能是否正常
  10:       * @author: James Cheung
  11:       * @version: 2.0
  12:       */
  13:  public class DataTableTest {
  14:   
  15:      @Before
  16:      public void init() {
  17:   
  18:      }
  19:   
  20:      @After
  21:      public void dispose() {
  22:   
  23:      }
  24:   
  25:      
  26:      @Test
  27:      public void tableInitTest() {
  28:          DataTable table = new DataTable(); //新建一个数据表对象,不带构造函数参数
  29:          fillTable(table);//填充数据
  30:          Assert.assertNotNull(table);
  31:          Assert.assertEquals(20, table.getColumns().size());
  32:          Assert.assertEquals(100, table.getRows().size());
  33:          //printTable(table);
  34:          System.out.print("------------------------------------------------------------------------------------------------------------------------\n");
  35:          table = new DataTable("TestTable");//新建一个数据表对象,带表名为参数
  36:          //测试添加数据列
  37:          fillTable(table);//填充数据
  38:          Assert.assertNotNull(table);
  39:          //printTable(table);
  40:      }
  41:   
  42:      @Test
  43:      public void tableSelectTest() throws Exception {
  44:          //测试数据表的选择过滤方法
  45:          DataTable table = new DataTable(); //新建一个数据表对象,不带构造函数参数
  46:          fillTable(table);//填充数据
  47:          List<DataRow> rows = table.select("col_1> 2 && col_2<10");
  48:          Assert.assertNotNull(rows);
  49:          Assert.assertEquals(2, rows.size());
  50:          //测试查询指定列
  51:          DataTable filterResult = table.select("col_1>2 && col_2<10",
  52:                  "col_1,col_2,col_3,col_4".split(","),
  53:                  true);
  54:          printTable(filterResult);
  55:   
  56:      }
  57:   
  58:      private void printTable(DataTable table) {
  59:   
  60:          for (int i = 0; i < table.getTotalCount(); i++) {
  61:              for (int j = 0; j < table.getColumns().size(); j++) {
  62:                  System.out.print(table.getValue(i, j));
  63:                  if (j < 19)
  64:                      System.out.print(" , ");
  65:              }
  66:              System.out.print("\n");
  67:          }
  68:      }
  69:   
  70:      private void fillTable(DataTable table) {
  71:          try {
  72:              //填充20列数据
  73:              for (int i = 0; i < 20; i++) {
  74:                  table.addColumn("Col_" + i, i % 13);
  75:              }
  76:              //填充100行数据
  77:              for (int i = 0; i < 100; i++) {
  78:                  DataRow row = table.newRow();
  79:                  for (int j = 0; j < 20; j++) {
  80:                      //循环每列加入数据
  81:                      row.setValue(j, i * j);
  82:                  }
  83:                  table.addRow(row);
  84:              }
  85:          } catch (Exception e) {
  86:              e.printStackTrace();
  87:          }
  88:      }
  89:  }
 
后记:仔细看的朋友可能发现了,DataTable里还有几个函数没有实现,那几个函数是我们后面要实现的基于DataTable进行分组汇总计算所需的功能,有兴趣的朋友也可以自己来实现一套试试,我这里可以提个醒给大家,下面是类似功能的测试代码:
 
  newTable = dataTable.Select("tableName", "count(Name),sum(11) aaa,sum(222) name,avg(aa),last,first,max,min aa,Name", "", "Name");
 posted on 2011-05-21 15:42  James Cheung  阅读(6772)  评论(5编辑  收藏  举报