spring mvc ajax请求

jar包中增加

jackson-annotations-2.5.0.jar

jackson-core-2.5.0.jar

jackson-databind-2.5.0.jar

springmvx.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc
     http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-4.1.xsd">
    <!-- spring mvc 注解驱动 -->
    <mvc:annotation-driven />
    <!-- 扫描器 -->
    <context:component-scan base-package="com" />

    <!-- 配置视图 解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 前缀和后缀 -->
        <property name="prefix" value="/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!-- 从请求和响应读取/编写字符串 -->
    <bean id="stringHttpMessage"
        class="org.springframework.http.converter.StringHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/plain;charset=UTF-8</value>
            </list>
        </property>
    </bean>

    <!-- 用于将对象转换为JSON -->
    <bean id="jsonConverter"
        class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>

    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="stringHttpMessage" />
                <ref bean="jsonConverter" />
            </list>
        </property>
    </bean>


</beans>

handler

package com.stone.controller;

import java.io.PrintWriter;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.stone.bean.UserInfo;

/**
 */
@Controller
public class UserController {

    @RequestMapping("/ajaxUser.do")
    public void userNumber(String num, HttpServletResponse response) {
        System.out.println(num);
        try {
            // 响应
            response.setContentType("text/html");
            response.setCharacterEncoding("utf-8");
            PrintWriter out = response.getWriter();
            if ("stone".equals(num)) {
                out.println("对不起，请重新输入账号！");
            } else {
                out.println("恭喜你，账号可以使用！");
            }
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @RequestMapping("/ajaxUser2.do")
    public @ResponseBody
    UserInfo ajaxUser(Integer userId) {
        System.out.println("-------bianhao:" + userId);
        UserInfo user = new UserInfo();
        user.setUserId(userId);
        user.setUserName("张三");
        user.setUserSex("男");
        return user;
    }

}

js

function btn01Click() {
    var num = $('#userNumber').val();
    if (num === '') {
        alert('请输入账号！');
    } else {
        $.post('ajaxUser.do', {
            num : num
        }, function(data) {
            alert(data);
        });
    }
}

function btn02Click() {
    var num = $('#userId').val();
    if (num === '') {
        alert('请输入账号！');
    } else {
        $.post('ajaxUser2.do', {
            userId : num
        }, function(data) {
            alert(data.userId+'----'+data.userName+'----'+data.userSex);
        }, "json");
    }
}

java bean

package com.stone.bean;

import java.util.Arrays;
import java.util.Date;

import org.springframework.format.annotation.DateTimeFormat;

public class UserInfo {

    private Integer userId;
    private String userName;
    private String userSex;
    private String[] userxq;
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date userTime;

    @Override
    public String toString() {
        return "UserInfo [userId=" + userId + ", userName=" + userName
                + ", userSex=" + userSex + ", userxq="
                + Arrays.toString(userxq) + ", userTime=" + userTime + "]";
    }

    public Date getUserTime() {
        return userTime;
    }

    public void setUserTime(Date userTime) {
        this.userTime = userTime;
    }

    public String[] getUserxq() {
        return userxq;
    }

    public void setUserxq(String[] userxq) {
        this.userxq = userxq;
    }

    public Integer getUserId() {
        return userId;
    }

    public void setUserId(Integer userId) {
        this.userId = userId;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserSex() {
        return userSex;
    }

    public void setUserSex(String userSex) {
        this.userSex = userSex;
    }

}