<html>
<head>
<title>operator</title>
</head>
<body>运算符
<table border="1">
  <tr>
    <td>
      <b>概念</b>
    </td>
    <td>
      <b>EL条件</b>
    </td>
    <td>
      <b>结果</b>
    </td>
  </tr>
  <tr>
    <td>Numeric less than</td>
    <td>${'${'}      1
      &lt;
      2}
</td>
    <td>${1 < 2}    </td>
  </tr>
  <tr>
    <td>Numeric greater than</td>
    <td>${'${'}      1
      &gt;
      2}
</td>
    <td>${1 > 2}    </td>
  </tr>
  <tr>
    <td>Numeric less than</td>
    <td>${'${'}      1 lt 2}
</td>
    <td>${1 lt 2}    </td>
  </tr>
  <tr>
    <td>Numeric greater than</td>
    <td>${'${'}      1 gt 2}
</td>
    <td>${1 gt 2}    </td>
  </tr>
  <tr>
    <td>Numeric Greater than or equal</td>
    <td>${'${'}      1
      &gt;
      = 1}
</td>
    <td>${1 >= 1}    </td>
  </tr>
  <tr>
    <td>Numeric Less than or equal</td>
    <td>${'${'}      1
      &lt;
      = 1}
</td>
    <td>${1 <= 1}    </td>
  </tr>
  <tr>
    <td>Numeric less than or equal</td>
    <td>${'${'}      1 le 1}
</td>
    <td>${1 le 1}    </td>
  </tr>
  <tr>
    <td>Numeric greater than or equal</td>
    <td>${'${'}      1 ge 1}
</td>
    <td>${1 ge 1}    </td>
  </tr>
  <tr>
    <td>Numeric equal to</td>
    <td>${'${'}      1 == 1}
</td>
    <td>${1 == 1}    </td>
  </tr>
  <tr>
    <td>Numeric equal to</td>
    <td>${'${'}      1 eq 1}
</td>
    <td>${1 eq 1}    </td>
  </tr>
  <tr>
    <td>Numeric not equal to</td>
    <td>${'${'}      1 ne 2}
</td>
    <td>${1 ne 2}    </td>
  </tr>
  <tr>
    <td>Alphabetic greater than</td>
    <td>${'${'}      'abe'
      &gt;
      'ade'}
</td>
    <td>${'abe' > 'ade'}    </td>
  </tr>
  <tr>
    <td>Alphabetic equal to</td>
    <td>${'${'}      'abe' eq 'abe'}
</td>
    <td>${'abe' eq 'abe'}    </td>
  </tr>
  <tr>
    <td>Alphabetic not equal to</td>
    <td>${'${'}      'abe' ne 'ade'}
</td>
    <td>${'abe' ne 'ade'}    </td>
    
  </tr>
<tr>
    <td>div</td>
    <td>${'${'}      100 div 20}
</td>
    <td>${100 div 20}    </td>
    
  </tr>
</table>
empty 运算符
<br/>
<b>  ${'${'}empty ""}
${empty ""}  <br/>
  ${'${'}empty "sometext"}
${empty "sometext"}  <br/>
</b>
</body>
</html>
