SpringMVC 搭建

1. 新建一个项目

 

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我们用eclipse新建项目，选择Dynamic Web Project(动态的Web项目)。

点击Next

 

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Project name里面写上 springmvc，这就是我们项目的名称，其他不用改，直接点击Finish 。

 

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OK，项目就建好了。

接下来一定要将项目的字符集改为UTF-8

右键项目——properties

 

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改为UTF-8，点击OK。

2. 编写 web.xml

当我们打开WebContent/WEB-INF目录的时候，发现里面只有一个lib目录，这是存放各种jar包的地方。我们知道一个web项目必须要有一个web.xml文件才行。

既然没有，我们自己写一个咯。

右键WEB-INF——new——file，新建一个web.xml文件。

点击Finish

将以下内容填进去即可。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
    http://xmlns.jcp.org.xml/ns/javaee/web-app_3_1.xsd"
    id="WebApp_ID" >
    
    <servlet>
        <!-- 声明Dispatcher，告诉Web容器我们将使用springMVC的DispatcherServlet -->
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- DispatcherServlet在加载时会需要SpringMVC的配置文件，因此需要声明该配置文件的位置。 -->
        <!-- 如果不配置该项，则应用会默认的去WEB-INF下寻找名字为[servlet-name]-servlet.xml的文件。 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/springmvc-config.xml</param-value>
        </init-param>
    </servlet>
    <!-- 配置url-pattern,设置为 / 拦截所有的URL请求，并映射到dispatcher -->
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

在WebContent->Web-INF下新建springmvc-config.xml，将以下内容填进去即可。

<?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:aop="http://www.springframework.org/schema/aop"
      xmlns:context="http://www.springframework.org/schema/context"
      xmlns:mvc="http://www.springframework.org/schema/mvc"
      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
          http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
     <!-- 配置自定义扫描的包 -->
     <context:component-scan base-package="com.controller"></context:component-scan>
  
    <mvc:annotation-driven>
         <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
           </mvc:message-converters>
    </mvc:annotation-driven>
     <!-- Date日期转换问题的解决 -->
     <bean
        class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="stringHttpMessageConverter" />
            </list>
        </property>
    </bean>
    <!-- String类型解析器，允许直接返回String类型的消息 -->
    <bean id="stringHttpMessageConverter"
        class="org.springframework.http.converter.StringHttpMessageConverter" />
 
     <!-- 配置视图解析器：如何把handler方法返回值解析为实际的物理视图（路径） -->
     <!-- <bean
         class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="prefix" value="/WEB-INF/views/"></property>记住前后都需要加斜杠
         <property name="suffix" value=".jsp"></property> 
     </bean> -->
</beans>

3.然后在src下新建control层的类

package com.controller;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.dl.common.CSVTool;
import com.dl.common.Result;
import com.dl.common.ResultUtil;

@Controller
@RequestMapping(value="/app")
public class ReadData {
    
    @org.springframework.web.bind.annotation.InitBinder
    public void InitBinder(WebDataBinder binder){
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        CustomDateEditor dateEditor = new CustomDateEditor(df, true);
        binder.registerCustomEditor(Date.class,dateEditor);
    }    
     
    @RequestMapping(value = "/getGPSPoints", method = RequestMethod.POST,produces = "application/json;charset=UTF-8")
    @ResponseBody
    public Result getGPSPoints(HttpServletRequest request) {
        try {
            List<Point> result =null;
            String csvPath="C:\Users\SWEETGUO\Desktop\毕业设计论文\数据\zyh.csv";
        
            result=CSVTool.loadData(csvPath);
            return ResultUtil.success(result);
        } catch (Exception e) {
            return ResultUtil.error(e.getMessage());
        }    
    }

}

涉及的相关类：

Result类

package com.dl.common;

public class Result<T> {
    /* 错误码 */
    private Integer code;
    /* 提示信息 */
    private String msg;
    /* 具体的对象*/    
    private T data;
    /* 返回对象集合/数组 */
    /*private List<T> list;*/

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }

    
}

ResultUtil 类：

package com.dl.common;

public class ResultUtil {
    //查询单个实体数据用
    public static Result success(Object object) {
        Result result = new Result();
        result.setCode(200);
        result.setMsg("success");
        result.setData(object);
        System.out.println("success:"+object);
        return result;
    }
   /* //查询单个实体数据用
    public static Result success(List<Object> list) {
        Result result = new Result();
        result.setCode(200);
        result.setMsg("success");
        result.setData(object);
        return result;
    }*/

    //插入、删除、更新数据库用D
    public static Result success() {
        return success(null);
    }
    //后台抛出异常用
    public static Result error(String msg) {
        Result result = new Result();
        result.setCode(500);        
        result.setMsg(msg); 
        System.out.println(msg);
        return result;
    }

   /* public static Result error(Integer code, String msg) {
        Result result = new Result();
        
        if(code!=0) {
            result.setCode(code);
        }else {
            result.setCode(500);
        }        
        
        if(msg!="") {
            result.setMsg(msg);
        }else {
            result.setMsg("fail");
        }
        //result.setData(object);
        return result;
    }*/

}

Point 类：

package com.controller;

import java.util.Date;

import org.springframework.format.annotation.DateTimeFormat;

import com.fasterxml.jackson.annotation.JsonFormat;

public class Point {
    private double x;
    private double y;
    private double speed;
    private double direction;
    @DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")//鎺ュ彈鍓嶅彴鐨勬椂闂存牸寮� 浼犲埌鍚庡彴鐨勬牸寮�?
    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone = "GMT+8")//浣滅敤锛氬悗鍙扮殑鏃堕棿 鏍煎紡鍖�? 鍙戦�佸埌鍓嶅彴
    private Date date;
    public double getX() {
        return x;
    }
    public void setX(double x) {
        this.x = x;
    }
    public double getY() {
        return y;
    }
    public void setY(double y) {
        this.y = y;
    }
    public double getSpeed() {
        return speed;
    }
    public void setSpeed(double speed) {
        this.speed = speed;
    }
    public double getDirection() {
        return direction;
    }
    public void setDirection(double direction) {
        this.direction = direction;
    }
    public Date getDate() {
        return date;
    }
    public void setDate(Date date) {
        this.date = date;
    }
    

}

目录结构：