Ajax+SpingMVC总结

2022-05-06 17:13:27 浏览数 (1)

废话不多说，请看代码和注释

代码语言：javascript复制
<%--
  Created by IntelliJ IDEA.
  User: root
  Date: 17-1-19
  Time: 下午2:23
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Ajax类别</title>
    <script type="text/javascript" src="js/jquery-3.1.1.min.js"></script>
    <script type="text/javascript">
        $(function () {
            $("#form1").submit(function () {//serializeArray()
                $.post("ajax/login2.do", $("#form1").serializeArray(),function (data, textStatus) {
                    $("#rs8").html(data.msg);
                });
                //阻止表单提交
                return false;
            });
        });
        function getString() {
            $.ajax({
                url: "ajax/getString.do",
                dataType:"text",
                data: {},
                success: function(data) {
                    $("#rs1").html(data);
                },
                error:function (data){
                    $("#rs1").html("error");
                }
            });
        }
        function getStringByName() {
            var name=$("#myname").val();
            $.ajax({
                url: "ajax/getStringByName.do",
                dataType:"text",
                data: {"name":name},
                success: function(data) {
                    $("#rs2").html(data);
                },
                error:function (data){
                    $("#rs2").html("error");
                }
            });
        }
        function getJson() {
            $.ajax({
                url: "ajax/getJson.do",
                dataType:"json",
                data: {},
                success: function(data) {
                    $("#rs3").html(data.msg);
                },
                error:function (data){
                    $("#rs3").html("error");
                }
            });
        }

        function byGet() {
            //回调函数：data是返回的内容，可以是text/html/json类型
            //textStatus是请求状态，包括success/error/notmodified/timeout4种，只有返回success才会调用回调函数
            $.get("ajax/getString.do", function (data, textStatus) {//也可以认该回调函数是处理成功回调函数
                $("#rs4").html(data);
            }, "text");
        }
        function byGetJson() {
            $.get("ajax/getJson.do", function (data, textStatus) {
                $("#rs5").html(data.msg);
            }, "json");
        }
        function byGetByName() {
            $.get("ajax/getStringByName.do", {name:$("#name").val()},function (data, textStatus) {
                $("#rs6").html(data);
            }, "html");
        }
        function login() {
            $.post("ajax/login.do", {
                uname:$("#uname").val(),
                upass:$("#upass").val()
            },function (data, textStatus) {
                $("#rs7").html(data.msg);
            }, "json");
        }


    </script>
</head>
<body>
    <h3>1. ajax()基本方式</h3>
    <h4>(1) ajax()函数，无参数传递，返回普通字符串</h4>
    <input type="button" οnclick="getString()" value="点我"/> -> <span id="rs1"></span><br>
    <h4>(2) ajax()函数，有参数传递，返回普通字符串(有乱码)</h4>
    请输入你的名字：<input type="text" id="myname" size="10"/><br>
    <input type="button" οnclick="getStringByName()" value="点我"/> -> <span id="rs2"></span><br>
    <h4>(3) ajax()函数，无参数传递，返回Json字符串(无乱码)</h4>
    <input type="button" οnclick="getJson()" value="点我"/> -> <span id="rs3"></span><br>
    <hr>
    <h3>2. get方式：传输数据小于2K，有缓存，不安全</h3>
    <h4>(4) get()函数，文本类型</h4>
    <input type="button" οnclick="byGet()" value="点我"/> -> <span id="rs4"></span><br>
    <h4>(5) get()函数，Json类型</h4>
    <input type="button" οnclick="byGetJson()" value="点我"/> -> <span id="rs5"></span><br>
    <h4>(6) get()函数，含参</h4>
    请输入你的名字：<input type="text" id="name" size="10"/><br>
    <input type="button" οnclick="byGetByName()" value="点我"/> -> <span id="rs6"></span><br>
    <hr>
    <h3>3. post()方式:安全，传输数据无限制</h3>
    <h4>(7) post()函数，含参</h4>
    帐号：<input type="text" id="uname" size="10"/><br>
    口令：<input type="password" id="upass" size="10"/><br>
    <input type="button" οnclick="login()" value="点我"/> -> <span id="rs7"></span><br>
    <h4>(8) post()函数，表单</h4>
    <h4>springMVC与Struts2的注入方式不同，直接写字段名</h4>
    <form id="form1">
    帐号：<input type="text" id="username" name="username" size="10"/><br>
    口令：<input type="password" id="password" name="password" size="10"/><br>
    <input type="submit" value="点我"/> -> <span id="rs8"></span><br>
    </form>
    <h4>$.post和$.get默认是采用异步的形式向服务器发送请求</h4>
</body>
</html>
代码语言：javascript复制
package controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.HashMap;
import java.util.Map;
import bean.UserBean;
import org.springframework.web.multipart.MultipartFile;
import util.FileUtil;

/**
 * Created by root on 17-1-19.
 */
@Controller
@RequestMapping("/ajax")
public class AjaxController {


    /**
     * 返回字符串
     * @return
     */
    @RequestMapping(value = "getString.do")
    @ResponseBody
    public String getString(){
        return "Hell,world!";
    }

    /**
     * 传递简单参数
     * @param name
     * @return
     */
    @RequestMapping("getStringByName.do")
    @ResponseBody
    public  String getStringByName(@RequestParam("name")String name){
        return "Hello," name;
    }

    /**
     * 返回Map
     * @return
     */
    @RequestMapping("getJson.do")
    @ResponseBody
    public Map<String, Object> getJson(){
        Map<String, Object> map=new HashMap<String, Object>();
        //将被解析为{"name":"Hello,中国！"}
        map.put("msg","Hello,中国！");
        return map;
    }
    /**
     * 返回Map
     * @return
     */
    @RequestMapping("login.do")
    @ResponseBody
    public Map<String, Object> login(@RequestParam("uname")String uname,@RequestParam("upass")String upass){
        Map<String, Object> map=new HashMap<>();
        System.out.println(uname ":" upass);
        map.put("msg",uname ":" upass);
        return map;
    }
    /**
     * 返回Map
     * @return
     */
    @RequestMapping("login2.do")
    @ResponseBody
    public Map<String, Object> login2(UserBean user){
        Map<String, Object> map=new HashMap<>();
        String msg=user.getUsername() ":" user.getPassword();
        System.out.println(msg);
        map.put("msg",msg);
        return map;
    }
}
代码语言：javascript复制
package bean;
/**
 * Created by root on 17-1-20.
 */
public class UserBean {
    private String username;
    private String password;
    private String header;
    @Override
    public String toString() {
        return "UserBean{"  
                "username='"   username   '''  
                ", password='"   password   '''  
                ", header='"   header   '''  
                '}';
    }
    public String getHeader() {
        return header;
    }
    public void setHeader(String header) {
        this.header = header;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

带参数的文件上传，使用了jquery.form.js插件

代码语言：javascript复制
<%--
  Created by IntelliJ IDEA.
  User: root
  Date: 17-1-20
  Time: 下午1:20
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>带参数的文件上传</title>
    <script type="text/javascript" src="js/jquery-3.1.1.min.js"></script>
    <script type="text/javascript" src="js/jquery.form.js"></script>
    <script type="text/javascript">
        $(function () {
            $("#form1").submit(function () {
                //$(this).ajaxSubmit(options)
                $(this).ajaxSubmit({
                    type: "POST",
                    url: "ajax/regist.do",
                    dataType: "json",
                    beforeSubmit: checkForm,//提交前数据校验
                    success: function(data){
                        $("#rs").html(data.msg);
                    }

                });
                return false;
            });
        });
        //beforeSubmit回调函数带三个调用参数：数组形式的表单数据，jQuery表单对象，以及传入ajaxForm/ajaxSubmit中的Options对象
        function checkForm(formData, jqForm, options) {
            if(formData[0].value=="" || formData[0].value==null){
                $("#rs").html("请输入帐号！");
                return false;
            }
            if(formData[1].value=="" || formData[1].value==null){
                $("#rs").html("请输入口令！");
                return false;
            }
            var file= $("#file").val();
            if (file == "") {
                $("#rs").html("请选择头像图片！");
                return false;
            }
            var suffix = file.substr(file.lastIndexOf('.')   1);
            if (suffix!='jpg' && suffix != 'png') {
                $("#rs").html("请选择jpg或者png格式的图片！");
                return false;
            }
        }
    </script>
</head>
<body>
<h3>输入信息</h3>
<form id="form1" enctype="multipart/form-data">
    帐号：<input type="text" id="username" name="username" size="10"/><br>
    口令：<input type="password" id="password" name="password" size="10"/></span><br>
    头像：<input type="file" name="file" id="file"/><br>
    <input type="submit" value="点我"/><br>
    <span id="rs"></span>
</form>
</body>
</html>

后台处理程序

代码语言：javascript复制
@RequestMapping(value = "regist.do",method = RequestMethod.POST)
@ResponseBody
public Map<String, Object> regist(@RequestParam(value="file",required=false) MultipartFile file, UserBean user){
    System.out.println("regist.do is start...");
    String newname="/root/header/" System.currentTimeMillis() file.getOriginalFilename();
    FileUtil.copy(file,newname);
    Map<String, Object> map=new HashMap<>();
    user.setHeader(newname);
    System.out.println(user);
    map.put("msg",user.toString());
    return map;
}
代码语言：javascript复制
package util;

import org.apache.commons.io.FileUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;

/**
 * Created by root on 17-1-20.
 */
public class FileUtil {
    public static boolean copy(MultipartFile file, String to){
        if(!file.isEmpty()){
            System.out.println("正在上传文件: " file.getOriginalFilename());
            try {
                FileUtils.copyInputStreamToFile(file.getInputStream(),new File(to));
                return true;
            } catch (IOException e) {
                e.printStackTrace();
                return false;
            }
        }else{
            System.out.println("空文件！");
            return false;
        }
    }
}
jquery form 插件 后台 文件上传

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