在Controller的ajax方法上添加@ResponseBody
@ResopnseBody作用：
1.把java字符串转换为json
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@RequestMapping("Ajax1") @ResponseBody public String ajax(String name) { System.out.println(name); return "zs"; } |
和jsp
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<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>ajax</title> <script type="text/javascript" src="/SpringMVC/js/jquery-3.2.1.min.js"></script> </head> <body> </body> <script type="text/javascript"> $.ajax({ type:"post", url:"/SpringMVC/user/Ajax1", data:"name=李四", dataType:"html", async:"true", success:function(data){ alert(data); } }); /* $.post("/SpringMVC/user/Ajax1",{"name":"张三"},function(data){ alert(data); }); */ </script> </html> |
2.把java对象转化为json对象（需要导jar包：jackson）
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@RequestMapping("Ajax2") @ResponseBody public User ajax2(User user) { System.out.println(user); return user; } |
和jsp
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<script type="text/javascript"> $.ajax({ type:"post", url:"/SpringMVC/user/Ajax2", data:"name=张五", dataType:"json", async:"true", success:function(data){ alert(data.name); } }); /* $.post("/SpringMVC/user/Ajax1",{"name":"张三"},function(data){ alert(data); }); */ </script> |