Springboot实现ajax

本文将结束如何让springboot完美结合ajax，springboot在这里先不介绍，想了解的同学可以去看我的博客，里面有Spirngboot+mybatis的demo

1. 配置好jsp路径；例如我是放在WEB-INF/jsp/下；配置路径如下

将代码写在application.properties里

spring.mvc.view.prefix:/WEB-INF/jsp/

spring.mvc.view.suffix:.jsp

2. controller代码

@RestController  
@RequestMapping("/api")  
public class CityRestController {  
  
    @Autowired  
    private CityService cityService;  
    @RequestMapping(value = "/ajax", method = RequestMethod.GET)  
    @ResponseBody  
    public Map<String,String> ajax(@RequestParam("cityName") String city){  
        Map<String, String> map=new HashMap<String, String>();  
        map.put("name", "zz");  
        map.put("city", "fujian");  
        System.out.println(city);  
        return map;  
  
    }  
    @RequestMapping(value = "/", method = RequestMethod.GET)  
    public ModelAndView index(HttpServletResponse response,  
            HttpServletRequest request) throws MalformedURLException {  
        return new ModelAndView("index");  
  
    }  
}


3. index.jsp代码如下

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script>
function sendAjax()
{
var cityname = $("#cityName").val(); 
   $.ajax(
    {
        url:"ajax",
        data:{"cityName":cityname},
        type:"get",
        dataType:"json",
        success:function(data)
        {
            alert(data.name);
        },
        error: function() {
            alert("error");
          }
    }); 
}
</script>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Springboot + Jsp</title>
</head>
<body>
    ${hello}
    <p>启动方式</p>

    <ol>
        <li>spring-boot:run</li>
        <li>打包成war，通过 java -jar demo-0.0.1-SNAPSHOT.war启动</li>
    </ol>
    <p>jar包运行的时候会404错误，因为默认jsp不会被拷贝到程序包中，而war包里面有包含了jsp，所以没问题。</p>
    <p>另外springboot官方并不推荐使用jsp</p>
    <input name="cityName" id="cityName"type=text/>
    <button οnclick="sendAjax()">提交</button>
</body>
</html>
4. 启动运行

http://localhost:8080/api/



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