本章将详细讨论如何使用jQuery AJAX来使用RESTful Web服务.
创建一个简单的Spring Boot Web应用程序并编写一个控制器类文件，用于重定向到HTML文件使用RESTful Web服务.
我们需要在构建配置文件中添加Spring Boot启动程序Thymeleaf和Web依赖项.
对于Maven用户，请在pom.xml文件中添加以下依赖项.
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>
对于Gradle用户，将以下依赖项添加到build.gradle文件中 :
compile group: ‘org.springframework.boot’, name: ‘spring-boot-starter-thymeleaf’ compile(‘org.springframework.boot:spring-boot-starter-web’)
@Controller类文件的代码低于 :
@Controller
public class ViewController {
}您可以定义请求URI方法以重定向到HTML文件，如下所示 : 去;
@RequestMapping("/view-products")
public String viewProducts() {
return "view-products";
}
@RequestMapping("/add-products")
public String addProducts() {
return "add-products";
}此API http://localhost:9090/products 应返回以下JSON作为响应，如图所示低于 :
[
{
"id": "1",
"name": "Honey"
},
{
"id": "2",
"name": "Almond"
}
]现在，在类路径的templates目录下创建一个view-products.html文件.
在HTML文件中，我们添加了jQuery库并编写了代码以在页面加载时使用RESTful Web服务.
<script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$.getJSON("http://localhost:9090/products", function(result){
$.each(result, function(key,value) {
$("#productsJson").append(value.id+" "+value.name+" ");
});
});
});
</script>POST方法和此URL http://localhost:9090/products 应包含以下请求正文和响应正文.
Request body的代码在下面给出 :
{
"id":"3",
"name":"Ginger"
}响应正文的代码在下面给出 :
Product is created successfully
现在，创建添加产品.类路径中templates目录下的html文件.
在HTML文件中，我们添加了jQuery库，并在单击按钮时编写了将表单提交给RESTful Web服务的代码.
<script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$("button").click(function() {
var productmodel = {
id : "3",
name : "Ginger"
};
var requestJSON = JSON.stringify(productmodel);
$.ajax({
type : "POST",
url : "http://localhost:9090/products",
headers : {
"Content-Type" : "application/json"
},
data : requestJSON,
success : function(data) {
alert(data);
},
error : function(data) {
}
});
});
});
</script>完整的代码如下.
Maven - pom.xml文件
<?xml version = "1.0" encoding = "UTF-8"?> <project xmlns = "http://maven.apache.org/POM/4.0.0" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.IT屋</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>demo</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.8.RELEASE</version> <relativePath /> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
Gradle - build.gradle的代码在下面给出 :
buildscript {
ext {
springBootVersion = ‘1.5.8.RELEASE’
}
repositories {
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
}
}
apply plugin: ‘java’
apply plugin: ‘eclipse’
apply plugin: ‘org.springframework.boot’
group = ‘com.it1352’
version = ‘0.0.1-SNAPSHOT’
sourceCompatibility = 1.8
repositories {
mavenCentral()
}
dependencies {
compile(‘org.springframework.boot:spring-boot-starter-web’)
compile group: ‘org.springframework.boot’, name: ‘spring-boot-starter-thymeleaf’
testCompile(‘org.springframework.boot:spring-boot-starter-test’)
}c下面给出的ontroller类文件 - ViewController.java在下面给出 :
package com.it1352.demo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class ViewController {
@RequestMapping("/view-products")
public String viewProducts() {
return "view-products";
}
@RequestMapping("/add-products")
public String addProducts() {
return "add-products";
}
}view-products.html文件的编号低于 :
<!DOCTYPE html>
<html>
<head>
<meta charset = "ISO-8859-1"/>
<title>View Products</title>
<script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$.getJSON("http://localhost:9090/products", function(result){
$.each(result, function(key,value) {
$("#productsJson").append(value.id+" "+value.name+" ");
});
});
});
</script>
</head>
<body>
<div id = "productsJson"> </div>
</body>
</html>add-products.html文件在下面和下面给出;
<!DOCTYPE html>
<html>
<head>
<meta charset = "ISO-8859-1" />
<title>Add Products</title>
<script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$("button").click(function() {
var productmodel = {
id : "3",
name : "Ginger"
};
var requestJSON = JSON.stringify(productmodel);
$.ajax({
type : "POST",
url : "http://localhost:9090/products",
headers : {
"Content-Type" : "application/json"
},
data : requestJSON,
success : function(data) {
alert(data);
},
error : function(data) {
}
});
});
});
</script>
</head>
<body>
<button>Click here to submit the form</button>
</body>
</html>主要的Spring Boot Application类文件在下面和下面给出;
package com.it1352.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}现在，您可以创建一个可执行的JAR文件，并使用以下Maven运行Spring Boot应用程序或Gradle命令.
对于Maven，使用下面给出的命令 :
mvn clean install
在"BUILD SUCCESS"之后，您可以在目标目录下找到JAR文件.
对于Gradle，请使用下面给出的命令 :
gradle clean build
之后" "BUILD SUCCESSFUL"，你可以在build/libs目录下找到JAR文件.
使用以下命令运行JAR文件 :
java -jar <JARFILE>
现在，应用程序已在Tomcat端口8080上启动.
现在点击Web浏览器中的URL，您可以看到输出显示 :
http://localhost:8080/view-products
http://localhost:8080/add-products
现在，点击按钮点击此处提交表格，您可以看到结果显示 :
现在，点击查看产品URL并查看创建的产品.
的http://本地主机:8080/视图副产物
要使用Angular JS来使用API，您可以使用下面给出的示例 :
使用以下代码创建Angular JS Controller以使用GET API - http://localhost:9090/products :
angular.module('demo', [])
.controller('Hello', function($scope, $http) {
$http.get('http://localhost:9090/products').
then(function(response) {
$scope.products = response.data;
});
});使用以下代码创建Angular JS Controller以使用POST API - http://localhost:9090/products :
angular.module('demo', [])
.controller('Hello', function($scope, $http) {
$http.post('http://localhost:9090/products',data).
then(function(response) {
console.log("Product created successfully");
});
});注意 : Post方法数据表示JSON格式的Request主体，用于创建产品.
