1,简单的导出execl,网上有很多,大家自行搜索
2,先看导出的样子
3,controller
package io.renren.modules.zz.controller;
import io.renren.common.excel.Execl;
import io.renren.common.excel.ExportExcel;
import io.renren.common.utils.R;
import io.renren.modules.zz.entity.ExportEntity;
import io.renren.modules.zz.service.ExportService;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.ss.usermodel.Row;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.io.IOException;
import java.util.*;
/**
* Created by Administrator on 2018-7-27.
*/
@RestController
@RequestMapping("zz/export")
public class ExportController {
@Autowired
private Execl execl;
@Autowired
private ExportService exportService;
@RequestMapping("execl")
//一些查询参数
public R exportExecl(String name,String tsystime){
if(StringUtils.isEmpty(tsystime)){
return R.error("登记日期必填");
}
Map<String,Object> map = new HashMap<>();
map.put("tsystime",tsystime);
//获取需要显示的数据
List list = exportService.getExportExeclList(map);
String fileName = name;
//数据头
List<String> headerList = Arrays.asList("ID","操作","操作人","操作时间");
ExportExcel ee = new ExportExcel(fileName, headerList);
//为每一行,每一个单元格赋值
for (int i = 0; i < list.size(); i++) {
Row row = ee.addRow();
ee.addCell(row,0,((ExportEntity) list.get(i)).getId());
ee.addCell(row,1,((ExportEntity) list.get(i)).getCenrollid());
ee.addCell(row,2,((ExportEntity) list.get(i)).getCusername());
ee.addCell(row,3,((ExportEntity) list.get(i)).getTsystime());
}
//导出路径
fileName = fileName==""? UUID.randomUUID().toString().replace("-",""):fileName+UUID.randomUUID().toString().replace("-","");
String p = execl.getPath()+ fileName+".xlsx";
try {
ee.writeFile(p);
} catch (IOException e) {
e.printStackTrace();
}
ee.dispose();
return R.ok().put("path",p);
}
}
4,Execl 主要是获取配置文件的
package io.renren.common.excel;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
/**
* Created by Administrator on 2018-7-27.
*/
@Component
@ConfigurationProperties(prefix="export")
public class Execl {
private String path;
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
}
5,Service
package io.renren.modules.zz.service;
import java.util.List;
import java.util.Map;
/**
* Created by Administrator on 2018-7-27.
*/
public interface ExportService {
/**
* 获取导出execl的数据
*/
List<String> getExportExeclList(Map<String,Object> map);
}
6,Impl
package io.renren.modules.zz.service.impl;
import com.baomidou.mybatisplus.service.impl.ServiceImpl;
import io.renren.modules.zz.dao.ExportDao;
import io.renren.modules.zz.service.ExportService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.Map;
/**
* Created by Administrator on 2018-7-27.
*/
@Service
public class ExportServiceImpl implements ExportService{
@Autowired
private ExportDao exportDao;
/**
* 获取导出execl的数据
*/
@Override
public List<String> getExportExeclList(Map<String,Object> map) {
return exportDao.getExportExeclList(map);
}
}
7,dao
package io.renren.modules.zz.dao;
import org.apache.ibatis.annotations.Mapper;
import java.util.List;
import java.util.Map;
/**
* Created by Administrator on 2018-7-27.
*/
@Mapper
public interface ExportDao{
/**
* 获取导出execl的数据
*/
List<String> getExportExeclList(Map<String,Object> map);
}
8,Mapper
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="io.renren.modules.zz.dao.ExportDao">
<select id="getExportExeclList" resultType="io.renren.modules.zz.entity.ExportEntity">
select 字段 from 表名
where 1=1
<if test="tsystime!=null and tsystime!=''">
and tsystime between left(#tsystime,10) and right(#tsystime,10)
</if>
</select>
</mapper>9,实体类Entity
package io.renren.modules.zz.entity;
/**
* Created by Administrator on 2018-7-27.
*/
public class ExportEntity {
字段
setter and getter
}
10,application.yml,可根据情况,自己修改
export:
path: d:/11,ExportExcel
/**
* Copyright © 2012-2014 All rights reserved.
*/
package io.renren.common.excel;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.*;
import javax.servlet.http.HttpServletResponse;
import io.renren.common.excel.annotation.ExcelField;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Comment;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.collect.Lists;
import org.springframework.beans.factory.annotation.Autowired;
/**
* 导出Excel文件（导出“XLSX”格式，支持大数据量导出 @see org.apache.poi.ss.SpreadsheetVersion）
* @author ThinkGem
* @version 2013-04-21
*/
public class ExportExcel {
private static Logger log = LoggerFactory.getLogger(ExportExcel.class);
/**
* 工作薄对象
*/
private SXSSFWorkbook wb;
/**
* 工作表对象
*/
private Sheet sheet;
/**
* 样式列表
*/
private Map<String, CellStyle> styles;
/**
* 当前行号
*/
private int rownum;
/**
* 注解列表（Object[]{ ExcelField, Field/Method }）
*/
List<Object[]> annotationList = Lists.newArrayList();
/**
* 构造函数
* @param title 表格标题，传“空值”，表示无标题
* @param cls 实体对象，通过annotation.ExportField获取标题
*/
public ExportExcel(String title, Class<?> cls){
this(title, cls, 1);
}
/**
* 构造函数
* @param title 表格标题，传“空值”，表示无标题
* @param cls 实体对象，通过annotation.ExportField获取标题
* @param type 导出类型（1:导出数据；2：导出模板）
* @param groups 导入分组
*/
public ExportExcel(String title, Class<?> cls, int type, int... groups){
// Get annotation field
Field[] fs = cls.getDeclaredFields();
for (Field f : fs){
ExcelField ef = f.getAnnotation(ExcelField.class);
if (ef != null && (ef.type()==0 || ef.type()==type)){
if (groups!=null && groups.length>0){
boolean inGroup = false;
for (int g : groups){
if (inGroup){
break;
}
for (int efg : ef.groups()){
if (g == efg){
inGroup = true;
annotationList.add(new Object[]{ef, f});
break;
}
}
}
}else{
annotationList.add(new Object[]{ef, f});
}
}
}
// Get annotation method
Method[] ms = cls.getDeclaredMethods();
for (Method m : ms){
ExcelField ef = m.getAnnotation(ExcelField.class);
if (ef != null && (ef.type()==0 || ef.type()==type)){
if (groups!=null && groups.length>0){
boolean inGroup = false;
for (int g : groups){
if (inGroup){
break;
}
for (int efg : ef.groups()){
if (g == efg){
inGroup = true;
annotationList.add(new Object[]{ef, m});
break;
}
}
}
}else{
annotationList.add(new Object[]{ef, m});
}
}
}
// Field sorting
Collections.sort(annotationList, new Comparator<Object[]>() {
public int compare(Object[] o1, Object[] o2) {
return new Integer(((ExcelField)o1[0]).sort()).compareTo(
new Integer(((ExcelField)o2[0]).sort()));
};
});
// Initialize
List<String> headerList = Lists.newArrayList();
for (Object[] os : annotationList){
String t = ((ExcelField)os[0]).title();
// 如果是导出，则去掉注释
if (type==1){
String[] ss = StringUtils.split(t, "**", 2);
if (ss.length==2){
t = ss[0];
}
}
headerList.add(t);
}
initialize(title, headerList);
}
/**
* 构造函数
* @param title 表格标题，传“空值”，表示无标题
* @param headers 表头数组
*/
public ExportExcel(String title, String[] headers) {
initialize(title, Lists.newArrayList(headers));
}
/**
* 构造函数
* @param title 表格标题，传“空值”，表示无标题
* @param headerList 表头列表
*/
public ExportExcel(String title, List<String> headerList) {
initialize(title, headerList);
}
/**
* 初始化函数
* @param title 表格标题，传“空值”，表示无标题
* @param headerList 表头列表
*/
private void initialize(String title, List<String> headerList) {
this.wb = new SXSSFWorkbook(500);
this.sheet = wb.createSheet("Export");
this.styles = createStyles(wb);
// Create title
if (StringUtils.isNotBlank(title)){
Row titleRow = sheet.createRow(rownum++);
titleRow.setHeightInPoints(30);
Cell titleCell = titleRow.createCell(0);
titleCell.setCellStyle(styles.get("title"));
titleCell.setCellValue(title);
sheet.addMergedRegion(new CellRangeAddress(titleRow.getRowNum(),
titleRow.getRowNum(), titleRow.getRowNum(), headerList.size()-1));
}
// Create header
if (headerList == null){
throw new RuntimeException("headerList not null!");
}
Row headerRow = sheet.createRow(rownum++);
headerRow.setHeightInPoints(16);
for (int i = 0; i < headerList.size(); i++) {
Cell cell = headerRow.createCell(i);
cell.setCellStyle(styles.get("header"));
String[] ss = StringUtils.split(headerList.get(i), "**", 2);
if (ss.length==2){
cell.setCellValue(ss[0]);
Comment comment = this.sheet.createDrawingPatriarch().createCellComment(
new XSSFClientAnchor(0, 0, 0, 0, (short) 3, 3, (short) 5, 6));
comment.setString(new XSSFRichTextString(ss[1]));
cell.setCellComment(comment);
}else{
cell.setCellValue(headerList.get(i));
}
sheet.autoSizeColumn(i);
}
for (int i = 0; i < headerList.size(); i++) {
int colWidth = sheet.getColumnWidth(i)*2;
sheet.setColumnWidth(i, colWidth < 3000 ? 3000 : colWidth);
}
log.debug("Initialize success.");
}
/**
* 创建表格样式
* @param wb 工作薄对象
* @return 样式列表
*/
private Map<String, CellStyle> createStyles(Workbook wb) {
Map<String, CellStyle> styles = new HashMap<String, CellStyle>();
CellStyle style = wb.createCellStyle();
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
Font titleFont = wb.createFont();
titleFont.setFontName("Arial");
titleFont.setFontHeightInPoints((short) 16);
titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
style.setFont(titleFont);
styles.put("title", style);
style = wb.createCellStyle();
style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
style.setBorderRight(CellStyle.BORDER_THIN);
style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setBorderLeft(CellStyle.BORDER_THIN);
style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setBorderTop(CellStyle.BORDER_THIN);
style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setBorderBottom(CellStyle.BORDER_THIN);
style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
Font dataFont = wb.createFont();
dataFont.setFontName("Arial");
dataFont.setFontHeightInPoints((short) 10);
style.setFont(dataFont);
styles.put("data", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(CellStyle.ALIGN_LEFT);
styles.put("data1", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(CellStyle.ALIGN_CENTER);
styles.put("data2", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(CellStyle.ALIGN_RIGHT);
styles.put("data3", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
// style.setWrapText(true);
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
Font headerFont = wb.createFont();
headerFont.setFontName("Arial");
headerFont.setFontHeightInPoints((short) 10);
headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
headerFont.setColor(IndexedColors.WHITE.getIndex());
style.setFont(headerFont);
styles.put("header", style);
return styles;
}
/**
* 添加一行
* @return 行对象
*/
public Row addRow(){
return sheet.createRow(rownum++);
}
/**
* 添加一个单元格
* @param row 添加的行
* @param column 添加列号
* @param val 添加值
* @return 单元格对象
*/
public Cell addCell(Row row, int column, Object val){
return this.addCell(row, column, val, 1, Class.class);
}
/**
* 添加一个单元格
* @param row 添加的行
* @param column 添加列号
* @param val 添加值
* @param align 对齐方式（1：靠左；2：居中；3：靠右）
* @return 单元格对象
*/
public Cell addCell(Row row, int column, Object val, int align, Class<?> fieldType){
Cell cell = row.createCell(column);
CellStyle style = styles.get("data"+(align>=1&&align<=3?align:""));
try {
if (val == null){
cell.setCellValue("");
} else if (val instanceof String) {
cell.setCellValue((String) val);
} else if (val instanceof Integer) {
cell.setCellValue((Integer) val);
} else if (val instanceof Long) {
cell.setCellValue((Long) val);
} else if (val instanceof Double) {
cell.setCellValue((Double) val);
} else if (val instanceof Float) {
cell.setCellValue((Float) val);
} else if (val instanceof Date) {
DataFormat format = wb.createDataFormat();
style.setDataFormat(format.getFormat("yyyy-MM-dd"));
cell.setCellValue((Date) val);
} else {
if (fieldType != Class.class){
cell.setCellValue((String)fieldType.getMethod("setValue", Object.class).invoke(null, val));
}else{
cell.setCellValue((String)Class.forName(this.getClass().getName().replaceAll(this.getClass().getSimpleName(),
"fieldtype."+val.getClass().getSimpleName()+"Type")).getMethod("setValue", Object.class).invoke(null, val));
}
}
} catch (Exception ex) {
log.info("Set cell value ["+row.getRowNum()+","+column+"] error: " + ex.toString());
cell.setCellValue(val.toString());
}
cell.setCellStyle(style);
return cell;
}
/**
* 添加数据（通过annotation.ExportField添加数据）
* @return list 数据列表
*/
public <E> ExportExcel setDataList(List<E> list){
for (E e : list){
int colunm = 0;
Row row = this.addRow();
StringBuilder sb = new StringBuilder();
for (Object[] os : annotationList){
ExcelField ef = (ExcelField)os[0];
Object val = null;
// Get entity value
try{
if (StringUtils.isNotBlank(ef.value())){
val = Reflections.invokeGetter(e, ef.value());
}else{
if (os[1] instanceof Field){
val = Reflections.invokeGetter(e, ((Field)os[1]).getName());
}else if (os[1] instanceof Method){
val = Reflections.invokeMethod(e, ((Method)os[1]).getName(), new Class[] {}, new Object[] {});
}
}
// If is dict, get dict label
//if (StringUtils.isNotBlank(ef.dictType())){
// val = DictUtils.getDictLabel(val==null?"":val.toString(), ef.dictType(), "");
//}
}catch(Exception ex) {
// Failure to ignore
log.info(ex.toString());
val = "";
}
this.addCell(row, colunm++, val, ef.align(), ef.fieldType());
sb.append(val + ", ");
}
log.debug("Write success: ["+row.getRowNum()+"] "+sb.toString());
}
return this;
}
/**
* 输出数据流
* @param os 输出数据流
*/
public ExportExcel write(OutputStream os) throws IOException{
wb.write(os);
return this;
}
/**
* 输出到客户端
* @param fileName 输出文件名
*/
public ExportExcel write(HttpServletResponse response, String fileName) throws IOException{
response.reset();
response.setContentType("application/octet-stream; charset=utf-8");
response.setHeader("Content-Disposition", "attachment; filename="+Encodes.urlEncode(fileName));
write(response.getOutputStream());
return this;
}
/**
* 输出到文件
* @param name 输出文件名
*/
public ExportExcel writeFile(String name) throws FileNotFoundException, IOException{
FileOutputStream os = new FileOutputStream(name);
this.write(os);
return this;
}
/**
* 清理临时文件
*/
public ExportExcel dispose(){
wb.dispose();
return this;
}
}
12,
/**
* Copyright (c) 2005-2012 springside.org.cn
*/
package io.renren.common.excel;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang3.Validate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.Assert;
/**
* 反射工具类.
* 提供调用getter/setter方法, 访问私有变量, 调用私有方法, 获取泛型类型Class, 被AOP过的真实类等工具函数.
* @author calvin
* @version 2013-01-15
*/
@SuppressWarnings("rawtypes")
public class Reflections {
private static final String SETTER_PREFIX = "set";
private static final String GETTER_PREFIX = "get";
private static final String CGLIB_CLASS_SEPARATOR = "$$";
private static Logger logger = LoggerFactory.getLogger(Reflections.class);
/**
* 调用Getter方法.
* 支持多级，如：对象名.对象名.方法
*/
public static Object invokeGetter(Object obj, String propertyName) {
Object object = obj;
for (String name : StringUtils.split(propertyName, ".")){
String getterMethodName = GETTER_PREFIX + StringUtils.capitalize(name);
object = invokeMethod(object, getterMethodName, new Class[] {}, new Object[] {});
}
return object;
}
/**
* 调用Setter方法, 仅匹配方法名。
* 支持多级，如：对象名.对象名.方法
*/
public static void invokeSetter(Object obj, String propertyName, Object value) {
Object object = obj;
String[] names = StringUtils.split(propertyName, ".");
for (int i=0; i<names.length; i++){
if(i<names.length-1){
String getterMethodName = GETTER_PREFIX + StringUtils.capitalize(names[i]);
object = invokeMethod(object, getterMethodName, new Class[] {}, new Object[] {});
}else{
String setterMethodName = SETTER_PREFIX + StringUtils.capitalize(names[i]);
invokeMethodByName(object, setterMethodName, new Object[] { value });
}
}
}
/**
* 直接读取对象属性值, 无视private/protected修饰符, 不经过getter函数.
*/
public static Object getFieldValue(final Object obj, final String fieldName) {
Field field = getAccessibleField(obj, fieldName);
if (field == null) {
throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + obj + "]");
}
Object result = null;
try {
result = field.get(obj);
} catch (IllegalAccessException e) {
logger.error("不可能抛出的异常{}", e.getMessage());
}
return result;
}
/**
* 直接设置对象属性值, 无视private/protected修饰符, 不经过setter函数.
*/
public static void setFieldValue(final Object obj, final String fieldName, final Object value) {
Field field = getAccessibleField(obj, fieldName);
if (field == null) {
throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + obj + "]");
}
try {
field.set(obj, value);
} catch (IllegalAccessException e) {
logger.error("不可能抛出的异常:{}", e.getMessage());
}
}
/**
* 直接调用对象方法, 无视private/protected修饰符.
* 用于一次性调用的情况，否则应使用getAccessibleMethod()函数获得Method后反复调用.
* 同时匹配方法名+参数类型，
*/
public static Object invokeMethod(final Object obj, final String methodName, final Class<?>[] parameterTypes,
final Object[] args) {
Method method = getAccessibleMethod(obj, methodName, parameterTypes);
if (method == null) {
throw new IllegalArgumentException("Could not find method [" + methodName + "] on target [" + obj + "]");
}
try {
return method.invoke(obj, args);
} catch (Exception e) {
throw convertReflectionExceptionToUnchecked(e);
}
}
/**
* 直接调用对象方法, 无视private/protected修饰符，
* 用于一次性调用的情况，否则应使用getAccessibleMethodByName()函数获得Method后反复调用.
* 只匹配函数名，如果有多个同名函数调用第一个。
*/
public static Object invokeMethodByName(final Object obj, final String methodName, final Object[] args) {
Method method = getAccessibleMethodByName(obj, methodName);
if (method == null) {
throw new IllegalArgumentException("Could not find method [" + methodName + "] on target [" + obj + "]");
}
try {
return method.invoke(obj, args);
} catch (Exception e) {
throw convertReflectionExceptionToUnchecked(e);
}
}
/**
* 循环向上转型, 获取对象的DeclaredField, 并强制设置为可访问.
*
* 如向上转型到Object仍无法找到, 返回null.
*/
public static Field getAccessibleField(final Object obj, final String fieldName) {
Validate.notNull(obj, "object can't be null");
Validate.notBlank(fieldName, "fieldName can't be blank");
for (Class<?> superClass = obj.getClass(); superClass != Object.class; superClass = superClass.getSuperclass()) {
try {
Field field = superClass.getDeclaredField(fieldName);
makeAccessible(field);
return field;
} catch (NoSuchFieldException e) {//NOSONAR
// Field不在当前类定义,继续向上转型
continue;// new add
}
}
return null;
}
/**
* 循环向上转型, 获取对象的DeclaredMethod,并强制设置为可访问.
* 如向上转型到Object仍无法找到, 返回null.
* 匹配函数名+参数类型。
*
* 用于方法需要被多次调用的情况. 先使用本函数先取得Method,然后调用Method.invoke(Object obj, Object... args)
*/
public static Method getAccessibleMethod(final Object obj, final String methodName,
final Class<?>... parameterTypes) {
Validate.notNull(obj, "object can't be null");
Validate.notBlank(methodName, "methodName can't be blank");
for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass()) {
try {
Method method = searchType.getDeclaredMethod(methodName, parameterTypes);
makeAccessible(method);
return method;
} catch (NoSuchMethodException e) {
// Method不在当前类定义,继续向上转型
continue;// new add
}
}
return null;
}
/**
* 循环向上转型, 获取对象的DeclaredMethod,并强制设置为可访问.
* 如向上转型到Object仍无法找到, 返回null.
* 只匹配函数名。
*
* 用于方法需要被多次调用的情况. 先使用本函数先取得Method,然后调用Method.invoke(Object obj, Object... args)
*/
public static Method getAccessibleMethodByName(final Object obj, final String methodName) {
Validate.notNull(obj, "object can't be null");
Validate.notBlank(methodName, "methodName can't be blank");
for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass()) {
Method[] methods = searchType.getDeclaredMethods();
for (Method method : methods) {
if (method.getName().equals(methodName)) {
makeAccessible(method);
return method;
}
}
}
return null;
}
/**
* 改变private/protected的方法为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。
*/
public static void makeAccessible(Method method) {
if ((!Modifier.isPublic(method.getModifiers()) || !Modifier.isPublic(method.getDeclaringClass().getModifiers()))
&& !method.isAccessible()) {
method.setAccessible(true);
}
}
/**
* 改变private/protected的成员变量为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。
*/
public static void makeAccessible(Field field) {
if ((!Modifier.isPublic(field.getModifiers()) || !Modifier.isPublic(field.getDeclaringClass().getModifiers()) || Modifier
.isFinal(field.getModifiers())) && !field.isAccessible()) {
field.setAccessible(true);
}
}
/**
* 通过反射, 获得Class定义中声明的泛型参数的类型, 注意泛型必须定义在父类处
* 如无法找到, 返回Object.class.
* eg.
* public UserDao extends HibernateDao<User>
*
* @param clazz The class to introspect
* @return the first generic declaration, or Object.class if cannot be determined
*/
@SuppressWarnings("unchecked")
public static <T> Class<T> getClassGenricType(final Class clazz) {
return getClassGenricType(clazz, 0);
}
/**
* 通过反射, 获得Class定义中声明的父类的泛型参数的类型.
* 如无法找到, 返回Object.class.
*
* 如public UserDao extends HibernateDao<User,Long>
*
* @param clazz clazz The class to introspect
* @param index the Index of the generic ddeclaration,start from 0.
* @return the index generic declaration, or Object.class if cannot be determined
*/
public static Class getClassGenricType(final Class clazz, final int index) {
Type genType = clazz.getGenericSuperclass();
if (!(genType instanceof ParameterizedType)) {
logger.warn(clazz.getSimpleName() + "'s superclass not ParameterizedType");
return Object.class;
}
Type[] params = ((ParameterizedType) genType).getActualTypeArguments();
if (index >= params.length || index < 0) {
logger.warn("Index: " + index + ", Size of " + clazz.getSimpleName() + "'s Parameterized Type: "
+ params.length);
return Object.class;
}
if (!(params[index] instanceof Class)) {
logger.warn(clazz.getSimpleName() + " not set the actual class on superclass generic parameter");
return Object.class;
}
return (Class) params[index];
}
public static Class<?> getUserClass(Object instance) {
Assert.notNull(instance, "Instance must not be null");
Class clazz = instance.getClass();
if (clazz != null && clazz.getName().contains(CGLIB_CLASS_SEPARATOR)) {
Class<?> superClass = clazz.getSuperclass();
if (superClass != null && !Object.class.equals(superClass)) {
return superClass;
}
}
return clazz;
}
/**
* 将反射时的checked exception转换为unchecked exception.
*/
public static RuntimeException convertReflectionExceptionToUnchecked(Exception e) {
if (e instanceof IllegalAccessException || e instanceof IllegalArgumentException
|| e instanceof NoSuchMethodException) {
return new IllegalArgumentException(e);
} else if (e instanceof InvocationTargetException) {
return new RuntimeException(((InvocationTargetException) e).getTargetException());
} else if (e instanceof RuntimeException) {
return (RuntimeException) e;
}
return new RuntimeException("Unexpected Checked Exception.", e);
}
}
13,
/**
* Copyright © 2012-2014 All rights reserved.
*/
package io.renren.common.excel.annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Excel注解定义
* @author ThinkGem
* @version 2013-03-10
*/
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface ExcelField {
/**
* 导出字段名（默认调用当前字段的“get”方法，如指定导出字段为对象，请填写“对象名.对象属性”，例：“area.name”、“office.name”）
*/
String value() default "";
/**
* 导出字段标题（需要添加批注请用“**”分隔，标题**批注，仅对导出模板有效）
*/
String title();
/**
* 字段类型（0：导出导入；1：仅导出；2：仅导入）
*/
int type() default 0;
/**
* 导出字段对齐方式（0：自动；1：靠左；2：居中；3：靠右）
*/
int align() default 0;
/**
* 导出字段字段排序（升序）
*/
int sort() default 0;
/**
* 如果是字典类型，请设置字典的type值
*/
String dictType() default "";
/**
* 反射类型
*/
Class<?> fieldType() default Class.class;
/**
* 字段归属组（根据分组导出导入）
*/
int[] groups() default {};
}