springmvc的视图解析器实现excel导出 - wtdig/study GitHub Wiki

springmvc视图解析器之excel导出

1、pom文件

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.wtdig</groupId>
    <artifactId>wtdigssm</artifactId>
    <version>1.0</version>
    <packaging>war</packaging>

    <name>wtdigssm Maven Webapp</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>
    <properties>
        <!-- 设置项目编码编码 -->
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <!-- spring版本号 -->
        <spring.version>4.3.5.RELEASE</spring.version>
        <!-- mybatis版本号 -->
        <mybatis.version>3.4.1</mybatis.version>
        <poi.version>3.16</poi.version>
    </properties>
    <dependencies>
        <!-- java ee -->
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
        </dependency>
        <!-- 单元测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <!-- 实现slf4j接口并整合 -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.2</version>
        </dependency>
        <!-- JSON -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.7</version>
        </dependency>
        <!-- 数据库 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
            <scope>runtime</scope>
        </dependency>
        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <!-- MyBatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <!-- mybatis/spring整合包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>${poi.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-examples</artifactId>
            <version>${poi.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-excelant -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-excelant</artifactId>
            <version>${poi.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>${poi.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml-schemas -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>${poi.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-scratchpad -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>${poi.version}</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>wtdig</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <!-- 设置JDK版本 -->
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2、spring-mvc配置文件

<?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: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/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <!-- 扫描web相关的bean -->
    <context:component-scan base-package="com.wtdig.controller,com.wtdig.websocket"/>

    <!-- 开启SpringMVC注解模式 -->
    <mvc:annotation-driven/>

    <!-- 静态资源默认servlet配置 -->
    <mvc:default-servlet-handler/>

    <!-- 配置jsp 显示ViewResolver -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

3、java controller代码

package com.wtdig.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author wb-wt261136
 * @version 2018/5/10. 16:52
 */
@Controller
public class ExportExcelController {

    @RequestMapping("/export")
    public ModelAndView exportExcel() {
        Map<String, Object> dataMap = new HashMap<String, Object>();
        //标题数据
        List<String> titles = new ArrayList<>();
        titles.add("列一");
        titles.add("列二");
        titles.add("列三");
        titles.add("列四");
        titles.add("列五");
        dataMap.put("titles", titles);
        //实际数据
        List<String> datas = new ArrayList<>();
        datas.add("数据一");
        datas.add("数据二");
        datas.add("数据三");
        datas.add("数据四");
        datas.add("数据五");
        dataMap.put("realData", datas);
        //新建excel视图解析类
        ExportExcel excelView = new ExportExcel();
        return new ModelAndView(excelView, dataMap);
    }
}


ExportExcel自定义的视图解析需要继承AbstractXlsView

package com.wtdig.controller;

import org.apache.poi.ss.usermodel.*;
import org.springframework.web.servlet.view.document.AbstractXlsView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
import java.util.Map;

/**
 * excel导出
 *
 * @author wb-wt261136
 * @version 2018/5/10. 16:06
 */
public class ExportExcel extends AbstractXlsView {

    @Override
    protected void buildExcelDocument(Map<String, Object> map, Workbook workbook, HttpServletRequest request, HttpServletResponse response) throws Exception {
        Sheet sheet;
        Cell cell;
        response.setContentType("application/octet-stream");
        response.setHeader("Content-Disposition", "attachment;filename=" + "test.xls");
        sheet = workbook.createSheet("sheet1");
        List<String> titles = (List<String>) map.get("titles");
        int len = titles.size();
        //标题样式
        CellStyle headerStyle = workbook.createCellStyle();
        headerStyle.setAlignment(HorizontalAlignment.CENTER);
        headerStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        //标题字体
        Font headerFont = workbook.createFont();
        headerFont.setFontHeightInPoints((short) 11);
        headerStyle.setFont(headerFont);
        short width = 20, height = 25 * 20;
        sheet.setDefaultColumnWidth(width);
        for (int i = 0; i < len; i++) { //设置标题
            String title = titles.get(i);
            cell = getCell(sheet, 0, i);
            cell.setCellStyle(headerStyle);
            setText(cell, title);
        }
        sheet.getRow(0).setHeight(height);
        //内容样式
        CellStyle contentStyle = workbook.createCellStyle();
        contentStyle.setAlignment(HorizontalAlignment.CENTER);
        List<String> varList = (List<String>) map.get("realData");
        int varCount = varList.size();
        for (int i = 0; i < varCount; i++) {
            String vpd = varList.get(i);
            for (int j = 0; j < len; j++) {
                String varstr = vpd != null ? vpd : "";
                cell = getCell(sheet, i + 1, j);
                cell.setCellStyle(contentStyle);
                setText(cell, varstr);
            }
        }
    }

    private Cell getCell(Sheet sheet, int row, int col) {
        Row sheetRow = sheet.getRow(row);
        if (sheetRow == null) {
            sheetRow = sheet.createRow(row);
        }
        Cell cell = sheetRow.getCell(col);
        if (cell == null) {
            cell = sheetRow.createCell(col);
        }
        return cell;
    }

    protected void setText(Cell cell, String text) {
        cell.setCellType(CellType.STRING);
        cell.setCellValue(text);
    }
}

-by wt

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