1. columns: [ 
  2.                 { 
  3.                     dataIndex: 'alarm', 
  4.                     text: '报警状态', 
  5.                     renderer:function(val){ 
  6.                         if(null!=val) 
  7.                         return "<p style='color:red'>"+val+"</p>"; 
  8.                         else return val; 
  9.                     } 
  10.                 }, 

显示效果：

ExtJS4 grid column 改变显示数据字体颜色_休闲