标签：http char request mapping body meta san user private
ajax使用jsonp实现跨域
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> <script type="text/javascript" src="/js/jquery-1.7.2.js"></script> <script type="text/javascript"> $(function(){ $("#but").click(function(){ $.ajax({ type:"get",//请求方式必须为get url:"http://localhost:9090/user/findUser",//另一个项目的地址 dataType:"jsonp",//类型必须是jsonp jsonp:"callback", success:function(data){ alert(data); var str = ""; for(i=0;i<data.length;i++){ str+= data[i].userid+" "+data[i].username+" "+data[i].userage+" "; } $("#show").html(str); } }); }); }); </script> </head> <body> <span id="show"></span> <input type="button" value="OK" id="but"/> </body> </html>
控制层的处理：
import java.util.ArrayList; import java.util.List; import org.springframework.http.converter.json.MappingJacksonValue; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; //下面两种方式都可以 @Controller @RequestMapping("/user") public class UserController { /* @RequestMapping("/findUser") @ResponseBody public Object findUser(String callback){ Users user = new Users(1, "admin", 20); Users user1 = new Users(2, "zhangsan", 22); Users user2 = new Users(3, "lisi", 24); List<Users> list = new ArrayList<>(); list.add(user); list.add(user1); list.add(user2); //json转换 MappingJacksonValue mv = new MappingJacksonValue(list); mv.setJsonpFunction(callback); return mv; }*/ @RequestMapping("/findUser") @ResponseBody public String findUser(String callback){ Users user = new Users(1, "admin", 20); Users user1 = new Users(2, "zhangsan", 22); Users user2 = new Users(3, "lisi", 24); List<Users> list = new ArrayList<>(); list.add(user); list.add(user1); list.add(user2); //json转换 String json = JsonUtils.objectToJson(list); return callback+"("+json+")"; } }
工具类：
/** * JSON转换工具类 */ public class JsonUtils { // 定义jackson对象 private static final ObjectMapper MAPPER = new ObjectMapper(); /** * 将对象转换成json字符串。 * <p>Title: pojoToJson</p> * <p>Description: </p> * @param data * @return */ public static String objectToJson(Object data) { try { String string = MAPPER.writeValueAsString(data); return string; } catch (JsonProcessingException e) { e.printStackTrace(); } return null; } /** * 将json结果集转化为对象 * * @param jsonData json数据 * @param clazz 对象中的object类型 * @return */ public static <T> T jsonToPojo(String jsonData, Class<T> beanType) { try { T t = MAPPER.readValue(jsonData, beanType); return t; } catch (Exception e) { e.printStackTrace(); } return null; } /** * 将json数据转换成pojo对象list * <p>Title: jsonToList</p> * <p>Description: </p> * @param jsonData * @param beanType * @return */ public static <T>List<T> jsonToList(String jsonData, Class<T> beanType) { JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType); try { List<T> list = MAPPER.readValue(jsonData, javaType); return list; } catch (Exception e) { e.printStackTrace(); } return null; } }
标签：http char request mapping body meta san user private
原文地址：https://www.cnblogs.com/-fpy/p/11600110.html
