你的位置:首页 > Java教程

[Java教程]AngularJS快速入门指南09:SQL

  我们可以将之前章节中的代码用来从数据库中读取数据。


通过PHP Server从MySQL数据库中获取数据

<div ng-app="myApp" ng-controller="customersCtrl"> <table> <tr ng-repeat="x in names">  <td>{{ x.Name }}</td>  <td>{{ x.Country }}</td> </tr></table></div><script>var app = angular.module('myApp', []);app.controller('customersCtrl', function($scope, $http) {  $http.get("http://customers_mysql.php")  .success(function (response) {$scope.names = response.records;});});</script>


通过ASP.NET Server从MSSQL数据库中获取数据

<div ng-app="myApp" ng-controller="customersCtrl"> <table> <tr ng-repeat="x in names">  <td>{{ x.Name }}</td>  <td>{{ x.Country }}</td> </tr></table></div><script>var app = angular.module('myApp', []);app.controller('customersCtrl', function($scope, $http) {  $http.get("http://customers_sql.aspx")  .success(function (response) {$scope.names = response.records;});});</script>


服务器代码示例

  下面几小节列出了几种不同的服务器端代码,用来从数据库中获取数据。

  1. 使用PHP和MySQL。返回JSON数据。

  2. 使用PHP和MS Access。返回JSON数据。

  3. 使用ASP.NET,VB和MS Access。返回JSON数据。

  4. 使用ASP.NET,Razor和SQL Lite。返回JSON数据。


跨站HTTP请求

  从不同的服务器请求数据被称为跨站HTTP请求(即cross-site HTTP requests)。

  跨站HTTP请求在web开发中很普遍。许多页面常常需要从不同的服务器加载各种资源,如CSS,images和scripts等。

  在现代浏览器中,出于安全考虑,通过脚本进行跨站HTTP请求被严格限制,只允许访问同一站点内的数据。

  下面这行代码被用在PHP中,用来允许跨站HTTP请求。

header("Access-Control-Allow-Origin: *");


1. 使用PHP和MySQL

<?phpheader("Access-Control-Allow-Origin: *");header("Content-Type: application/json; charset=UTF-8");$conn = new mysqli("myServer", "myUser", "myPassword", "Northwind");$result = $conn->query("SELECT CompanyName, City, Country FROM Customers");$outp = "";while($rs = $result->fetch_array(MYSQLI_ASSOC)) {  if ($outp != "") {$outp .= ",";}  $outp .= '{"Name":"' . $rs["CompanyName"] . '",';  $outp .= '"City":"'  . $rs["City"]    . '",';  $outp .= '"Country":"'. $rs["Country"]   . '"}'; }$outp ='{"records":['.$outp.']}';$conn->close();echo($outp);?>


2. 使用PHP和MS Access

<?phpheader("Access-Control-Allow-Origin: *");header("Content-Type: application/json; charset=ISO-8859-1");$conn = new COM("ADODB.Connection");$conn->open("PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source=Northwind.mdb");$rs = $conn->execute("SELECT CompanyName, City, Country FROM Customers");$outp = "";while (!$rs->EOF) {  if ($outp != "") {$outp .= ",";}  $outp .= '{"Name":"' . $rs["CompanyName"] . '",';  $outp .= '"City":"'  . $rs["City"]    . '",';  $outp .= '"Country":"'. $rs["Country"]   . '"}';   $rs->MoveNext();}$outp ='{"records":['.$outp.']}';$conn->close();echo ($outp);?>


3. 使用ASP.NET,VB和MS Access

<%@ Import Namespace="System.IO"%><%@ Import Namespace="System.Data"%><%@ Import Namespace="System.Data.OleDb"%><%Response.AppendHeader("Access-Control-Allow-Origin", "*")Response.AppendHeader("Content-type", "application/json")Dim conn As OleDbConnectionDim objAdapter As OleDbDataAdapterDim objTable As DataTableDim objRow As DataRowDim objDataSet As New DataSet()Dim outpDim cconn = New OledbConnection("Provider=Microsoft.Jet.OLEDB.4.0;data source=Northwind.mdb")objAdapter = New OledbDataAdapter("SELECT CompanyName, City, Country FROM Customers", conn)objAdapter.Fill(objDataSet, "myTable")objTable=objDataSet.Tables("myTable")outp = ""c = chr(34)for each x in objTable.Rowsif outp <> "" then outp = outp & ","outp = outp & "{" & c & "Name"  & c & ":" & c & x("CompanyName") & c & ","outp = outp &    c & "City"  & c & ":" & c & x("City")    & c & "," outp = outp &    c & "Country" & c & ":" & c & x("Country")   & c & "}"nextoutp ="{" & c & "records" & c & ":[" & outp & "]}"response.write(outp)conn.close%>


4. 使用ASP.NET,Razor和SQL Lite

@{Response.AppendHeader("Access-Control-Allow-Origin", "*")Response.AppendHeader("Content-type", "application/json")var db = Database.Open("Northwind");var query = db.Query("SELECT CompanyName, City, Country FROM Customers");var outp =""var c = chr(34)[email protected](var row in query){if outp <> "" then outp = outp + ","outp = outp + "{" + c + "Name"  + c + ":" + c + @row.CompanyName + c + ","outp = outp +    c + "City"  + c + ":" + c + @row.City    + c + ","outp = outp +    c + "Country" + c + ":" + c + @row.Country   + c + "}"}outp ="{" + c + "records" + c + ":[" + outp + "]}"@outp

上一章 - AngularJS快速入门指南08:表格
下一章 - AngularJS快速入门指南10:DOM节点