package com.ken.wms.common.util;
import org.apache.commons.lang3.math.NumberUtils;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.core.io.ClassPathResource;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.*;
/**
* Excel -JavaBean 转换器
*
* @author Ken
* @since 2017/3/27.
*/
public class EJConvertor {
/**
* 默认配置文件名
*/
private static final String DEFAULT_CONFIG_FILE_NAME = "EJConvertorConfig.xml";
/**
* Entity 节点名称
*/
private static final String ENTITY_ELEMENT = "entity";
/**
* Property 节点名称
*/
private static final String PROPERTY_ELEMENT = "property";
/**
* Field 节点信息
*/
private static final String FIELD_ELEMENT = "field";
/**
* Value 节点信息
*/
private static final String VALUE_ELEMENT = "value";
/**
* class 属性
*/
private static final String CLASS_ATTRIBUTE = "class";
/**
* sheetName 属性
*/
private static final String SHEET_NAME_ATTRIBUTE = "sheetName";
/**
* boldHeading 属性
*/
private static final String BOLD_HEADING_ATTRIBUTE = "boldHeading";
/**
* JavaBean的映射信息
*/
private Map<String, MappingInfo> excelJavaBeanMap;
public EJConvertor() {
init(DEFAULT_CONFIG_FILE_NAME);
}
public EJConvertor(String filePath) {
init(filePath);
}
/**
* 初始化映射信息
*
* @param fileLocation 配置文件路径
*/
private void init(String fileLocation) {
try {
// 读取配置文件
File configFile = new ClassPathResource(fileLocation).getFile();
DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = documentBuilder.parse(configFile);
// 解析配置文件
this.excelJavaBeanMap = parseMappingInfo(doc);
} catch (ParserConfigurationException | SAXException | IOException e) {
e.printStackTrace();
}
}
/**
* 解析 Document root 下配置的所有 excel-javaBean 映射信息
*
* @param root Document 根节点
* @return 返回 excel-javaBean 映射信息
*/
private Map<String, MappingInfo> parseMappingInfo(Document root) {
// 获取 root 下的所有 entity 节点
NodeList entities = root.getElementsByTagName(ENTITY_ELEMENT);
// 创建承载 MappingInfo 信息的Map
Map<String, MappingInfo> mappingInfoMap = new HashMap<>(entities.getLength());
// 解析 entity 节点
for (int index = 0; index < entities.getLength(); index++) {
// 创建 mappingInfo
MappingInfo mappingInfo = new MappingInfo();
// 解析节点信息
Node entityNode = entities.item(index);
if (entityNode.getNodeType() == Node.ELEMENT_NODE) {
Element entityElement = (Element) entityNode;
parseEntityElement(entityElement, mappingInfo);
}
// 保存节点信息
mappingInfoMap.put(mappingInfo.getClassName(), mappingInfo);
}
return mappingInfoMap;
}
/**
* 解析 entity 节点信息
*
* @param entityElement entity 节点
* @param mappingInfo 本 entity 节点包含的映射信息
*/
private void parseEntityElement(Element entityElement, MappingInfo mappingInfo) {
// 解析 entity 的 class 属性
String className = entityElement.getAttribute(CLASS_ATTRIBUTE);
mappingInfo.setClassName(className);
// 解析 entity 的 sheetName 属性
if (entityElement.hasAttribute(SHEET_NAME_ATTRIBUTE))
mappingInfo.setSheetName(entityElement.getAttribute(SHEET_NAME_ATTRIBUTE));
// 解析 entity 的 boldHeading 属性
if (entityElement.hasAttribute(BOLD_HEADING_ATTRIBUTE)) {
String isBoldHeading = entityElement.getAttribute(BOLD_HEADING_ATTRIBUTE);
mappingInfo.setBoldHeading(isBoldHeading.equals("true"));
}
// 读取并解析 property 节点
NodeList properties = entityElement.getElementsByTagName(PROPERTY_ELEMENT);
for (int index = 0; index < properties.getLength(); index++) {
Node propertyNode = properties.item(index);
if (propertyNode.getNodeType() == Node.ELEMENT_NODE) {
Element propertyElement = (Element) propertyNode;
parsePropertyElement(propertyElement, mappingInfo);
}
}
}
/**
* 解析 property 节点信息
*
* @param propertyElement property 节点
* @param mappingInfo 承载映射信息
*/
private void parsePropertyElement(Element propertyElement, MappingInfo mappingInfo) {
NodeList infoNodes = propertyElement.getChildNodes();
String field = null;
String value = null;
for (int infoNode_index = 0; infoNode_index < infoNodes.getLength(); infoNode_index++) {
Node infoNode = infoNodes.item(infoNode_index);
if (infoNode.getNodeName().equals(FIELD_ELEMENT))
field = infoNode.getTextContent();
if (infoNode.getNodeName().equals(VALUE_ELEMENT))
value = infoNode.getTextContent();
}
// 添加到映射信息中
if (field != null && value != null) {
mappingInfo.addFieldValueMapping(field, value);
mappingInfo.addValueFieldMapping(value, field);
}
}
/**
* 讀取 Excel 文件中的内容 Excel 文件中的每一行代表了一个对象实例,而行中各列的属性值对应为对象中的各个属性值
* 读取时,需要指定读取目标对象的类型以获得相关的映射信息,并且要求该对象已在配置文件中注册
*
* @param javaBeanClass 目标对象的类型
* @param file 数据来源的 Excel 文件
* @return 包含若干个目标对象实例的 List
*/
public <T> List<T> excelReader(Class<T> javaBeanClass, File file) {
// 参数检查
if (file == null || javaBeanClass == null)
return null;
// 初始化存放读取结果的 List
List<T> javaBeans = new ArrayList<>();
// 获取类名和映射信息
String className = javaBeanClass.getName();
MappingInfo mappingInfo = excelJavaBeanMap.get(className);
if (mappingInfo == null)
return null;
// 读取 Excel 文件
try (Workbook workbook = new XSSFWorkbook(new FileInputStream(file))) {
Sheet dataSheet = workbook.getSheetAt(0);
Row row;
Cell cell;
Iterator<Row> rowIterator = dataSheet.iterator();
Iterator<Cell> cellIterator;
// 读取第一行表头信息
if (!rowIterator.hasNext())
return null;
String fieldName;
Field fieldInstance;
Class<?> fieldClass;
List<String> fieldNameList = new ArrayList<>();// 目标�
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