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    使用JSON格式提交数据到服务端的实例代码

    栏目：win服务器问题汇总 时间：2019-11-10 08:59

    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" /><br/> 
  血量：<input type="text" /><br/> 
  <input type="button" value="提交" >  
 </form> 
 <div ></div> 
 <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" /><br/> 
  血量：<input type="text" /><br/> 
  <input type="button" value="提交" > 
 </form> 
 <div ></div> 
 <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);
 } 
}
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