Example code for submitting data to the server using JSON format
This article mainly introduces the example code of using JSON format to submit data to the server. The code is simple and easy to understand, very good, and has reference value. Friends who need it can refer to it
Prepare Hero.java
public class Hero {
private String name;
private int hp;
public String getName() {
return name;
} public void setName(String name) {
this.name = name;
}
public int getHp() {
return hp;
}
public void setHp(int hp) {
this.hp = hp;
}
@Override
public String toString() {
return "Hero [name=" + name + ", hp=" + hp + "]";
}
}
public class Hero {
private String name;
private int hp;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getHp() {
return hp;
}
public void setHp(int hp) {
this.hp = hp;
}
@Override
public String toString() {
return "Hero [name=" + name + ", hp=" + hp + "]";
}
}submit.html文件
[html] view plain copy print?<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>用AJAX以JSON方式提交数据</title>
<script type="text/javascript" src="jquery.min.js"></script>
</head>
<body>
<form >
名称：<input type="text" id="name"/><br/>
血量：<input type="text" id="hp"/><br/>
<input type="button" value="提交" id="sender">
</form>
<p id="messagep"></p>
<script>
$('#sender').click(function(){
var name=document.getElementById('name').value;
var hp=document.getElementById('hp').value;
var hero={"name":name,"hp":hp};
var url="submitServlet";
$.post(
url,
{"data":JSON.stringify(hero)},
function(data) {
alert("提交成功，请在Tomcat控制台查看服务端接收到的数据");
});
});
</script>
</body>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>用AJAX以JSON方式提交数据</title>
<script type="text/javascript" src="jquery.min.js"></script>
</head>
<body>
<form >
名称：<input type="text" id="name"/><br/>
血量：<input type="text" id="hp"/><br/>
<input type="button" value="提交" id="sender">
</form>
<p id="messagep"></p>
<script>
$('#sender').click(function(){
var name=document.getElementById('name').value;
var hp=document.getElementById('hp').value;
var hero={"name":name,"hp":hp};
var url="submitServlet";
$.post(
url,
{"data":JSON.stringify(hero)},
function(data) {
alert("提交成功，请在Tomcat控制台查看服务端接收到的数据");
});
});
</script>
</body>
</body>
</html>The function of JSON.stringify function is to convert a javascript object into a string in JSON format.
Prepare SubmitServlet to receive data
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONObject;
public class SubmitServlet extends HttpServlet {
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String data =request.getParameter("data");
System.out.println("服务端接收到的数据是：" +data);
JSONObject json=JSONObject.fromObject(data);
System.out.println("转换为JSON对象之后是："+ json);
Hero hero = (Hero)JSONObject.toBean(json,Hero.class);
System.out.println("转换为Hero对象之后是："+hero);
}
}
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONObject;
public class SubmitServlet extends HttpServlet {
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String data =request.getParameter("data");
System.out.println("服务端接收到的数据是：" +data);
JSONObject json=JSONObject.fromObject(data);
System.out.println("转换为JSON对象之后是："+ json);
Hero hero = (Hero)JSONObject.toBean(json,Hero.class);
System.out.println("转换为Hero对象之后是："+hero);
}
}1. Get the string submitted by the browser
2. Put the characters Convert string to JSON object
3. Convert JSON object to Hero object
Finally configure web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app> <servlet> <servlet-name>SubmitServlet</servlet-name> <servlet-class>SubmitServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>SubmitServlet</servlet-name> <url-pattern>/submitServlet</url-pattern> </servlet-mapping> </web-app> <?xml version="1.0" encoding="UTF-8"?> <web-app> <servlet> <servlet-name>SubmitServlet</servlet-name> <servlet-class>SubmitServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>SubmitServlet</servlet-name> <url-pattern>/submitServlet</url-pattern> </servlet-mapping>
Start tomcat and access http://127.0.0.1:8080/project name/submit.html
See in the tomcat console The transmitted data
# is what I compiled for everyone. I hope it will be helpful to everyone in the future.
Related articles:
Two solutions for Ajax to open a new window and be intercepted by the browser
ajax implements asynchronous files Or image upload function
AJAX is used to determine whether the user is registered
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