使用JSON格式提交数据到服务端的实例代码
准备Hero.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | 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> <div id="messageDiv"></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" id="name"/><br/> 血量：<input type="text" id="hp"/><br/> <input type="button" value="提交" id="sender"> </form> <div id="messageDiv"></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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | 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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | <?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
在tomcat控制台看到传来的数据
总结
以上所述是小编给大家介绍的使用JSON格式提交数据到服务端的实例代码，希望对大家有所帮助
