欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  web前端

使用JSON提交数据到服务端步奏详解

程序员文章站 2022-04-12 10:09:17
...
这次给大家带来使用JSON提交数据到服务端步奏详解,使用JSON提交数据到服务端的注意事项有哪些,下面就是实战案例,一起来看一下。

准备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>

JSON.stringify函数的作用是将一个javascript对象,转换为JSON格式的字符串

准备SubmitServlet用来接收数据

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. 获取浏览器提交的字符串

2. 把字符串转换为JSON对象

3. 把JSON对象转换为Hero对象

最后配置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>

</web-app>启动tomcat访问http://127.0.0.1:8080/项目名/submit.html

使用JSON提交数据到服务端步奏详解

在tomcat控制台看到传来的数据

使用JSON提交数据到服务端步奏详解

相信看了本文案例你已经掌握了方法,更多精彩请关注其它相关文章!

推荐阅读:

Angular父组件调用子组件步奏详解

vue axios请求超时处理详解(附代码)

以上就是使用JSON提交数据到服务端步奏详解的详细内容,更多请关注其它相关文章!