知识大全 js实现json数据行到列的转换的实例代码

Posted 2022-07-20 电量

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为了实现这样的数据显示出来三个序列分别为郑州新乡安阳的电量就需要自己实现对这样数据的转换转换成如下的形式

　　月份郑州电量新乡电量安阳电量这样 Ext的图表就能把它显示成三个序列了我写了如下的函数实现这个功能

复制代码代码如下: function CovertData(jsonData idField fromField toField) var result = [] curRecord =null num; var fromFields = fromField split( ); // 循环整个数组 [ ] for(var idx= ;idx<jsonData length;idx++) num = findIdx(result idField jsonData[idx][idField]); if(num!= ) curRecord = result[num]; else curRecord = ; ; // 循环每个json对象中的字段 for(var key in jsonData[idx]) // 处理转换的数据内容 for(var i= ;i<fromFields length;i++) if(key == fromFields[i]) curRecord[jsonData[idx][toField]+ + fromFields[i]] = jsonData[idx][key]; break; // 除数据内容外只处理标识字段数据 if(key == idField) curRecord[key] = jsonData[idx][key]; if(num== ) result push(curRecord); return result;

　　function findIdx(jsonData columnName value) for(var idx = ;idx<jsonData length;idx++) if(jsonData[idx][columnName]==value) return idx; return ; JsTestDriver的测试代码如下 TestCase("Test json data row to column" setUp:function() this jsonData = [yearmonth: ppq: spq: pany: dfsoft yearmonth: ppq: spq: pany: dfsoft yearmonth: ppq: spq: pany: dfsoft yearmonth: ppq: spq: pany: dfsoft yearmonth: ppq: spq: pany: v yearmonth: ppq: spq: pany: v yearmonth: ppq: spq: pany: v yearmonth: ppq: spq: pany: v ];

　　var fromField = ppq spq toField = pany idField = yearmonth ; this resultData = CovertData(this jsonData idField fromField toField); "test store has columns":function() var month = this resultData[findIdx(this resultData yearmonth )]; var month = this resultData[findIdx(this resultData yearmonth )]; var month = this resultData[findIdx(this resultData yearmonth )]; var month = this resultData[findIdx(this resultData yearmonth )];

　　assertEquals( this resultData length); assertEquals( month [ dfsoft ppq ]); assertEquals( month [ v ppq ]); assertEquals( month [ dfsoft ppq ]); assertEquals( month [ v ppq ]); assertEquals( month [ dfsoft ppq ]); assertEquals( month [ v ppq ]); assertEquals( month [ dfsoft ppq ]); assertEquals( month [ v ppq ]);

　　assertEquals( month [ dfsoft spq ]); assertEquals( month [ v spq ]); assertEquals( month [ dfsoft spq ]); assertEquals( month [ v spq ]); assertEquals( month [ dfsoft spq ]); assertEquals( month [ v spq ]); assertEquals( month [ dfsoft spq ]); assertEquals( month [ v spq ]); )

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