jsp+js实现可排序表格

　首先，定义一个js： tableSort.js:

function sort(tableId, sortColumn,nodeType) {  
    var table = document.getElementById("theTable");  
    var tableBody = table.tBodies[0];  
    var tableRows = tableBody.rows;  
      
      
    var rowArray = new Array();  
    for (var i = 0; i < tableRows.length; i++) {  
        rowArray[i] = tableRows[i];  
    }  
    if (table.sortColumn == sortColumn) {  
        rowArray.reverse();  
    } else {  
        rowArray.sort(generateCompareTR(sortColumn, nodeType));  
    }  
    var tbodyFragment = document.createDocumentFragment();  
    for (var i = 0; i < rowArray.length; i++) {  
        tbodyFragment.appendChild(rowArray[i]);  
    }  
    tableBody.appendChild(tbodyFragment);  
    table.sortColumn = sortColumn;  
}  
 
 
function generateCompareTR(sortColumn, nodeType) {  
    return function compareTR(trLeft, trRight) {  
        var leftValue = convert(trLeft.cells[sortColumn].firstChild.nodeValue, nodeType);  
        var rightValue = convert(trRight.cells[sortColumn].firstChild.nodeValue, nodeType);  
        if (leftValue < rightValue) {  
            return -1;  
        } else {  
            if (leftValue > rightValue) {  
                return 1;  
            } else {  
                return 0;  
            }  
        }  
    };  
}  
 
 
function convert(value, dataType) {  
    switch (dataType) {  
      case "int":  
        return parseInt(value);  
      case "float":  
        return parseFloat(value);  
      case "date":  
        return new Date(Date.parse(value));  
      default:  
        return value.toString();  
    }  
}