java往csv文件中导出百万级数据
2017-03-22 15:57
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package com.hcycom.action;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.List;
import jxl.Workbook;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import com.hcycom.bean.MonthValue;
import com.hcycom.page.page;
import com.hcycom.service.Data;
public class Excel {
//static String url = "/opt/apache-tomcat-6.0.37/file/";
static String url = "D:/opt/apache-tomcat-6.0.37/file/";
Data data;
public void setExcel(String leixing, String name,page pg) {
if ("excel".equals(leixing)) {
wenjian(pg, name);
}
if ("cvs".equals(leixing)||"plCSV".equals(leixing)) {
wenJianCsv(pg, name);
}
if ("txt".equals(leixing)) {
wenJianTxt(pg, name);
}
}
public void setExcelCSV(String name,List<MonthValue> list) {
wenJianPLCsv(list, name);
}
public void wenJianPLCsv(List<MonthValue> list, String name) { //导出百万条数据name是文件名 list是数据
try {
File file = new File(url + name + ".csv");
if(!file.exists()){
System.out.println("创建文件!!!");
file.createNewFile();
}
writeFileContent(url + name + ".csv", list);
//writeFileContent()这个方法是分批往csv文件中追加数据 ,下面注释掉的是一次性往csv文件中写
数据
/*FileOutputStream stream;// provides file access
OutputStreamWriter writer;// writes to the file
stream = new FileOutputStream(file);
writer = new OutputStreamWriter(stream, "gb2312");
for (int q = 0; q < list.size(); q++) {
writer.write(list.get(q).getAqi());
writer.write(list.get(q).getSO2());
writer.write("\r\n");
}
writer.close();
stream.close();*/
} catch (IOException e1) {
e1.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public static boolean writeFileContent(String filepath,List<MonthValue> list) throws IOException{
Boolean bool = false;
String temp = "";
FileInputStream fis = null;
InputStreamReader isr = null;
BufferedReader br = null;
FileOutputStream fos = null;
PrintWriter pw = null;
try {
File file = new File(filepath);//文件路径(包括文件名称)
//将文件读入输入流
fis = new FileInputStream(file);
isr = new InputStreamReader(fis);
br = new BufferedReader(isr);
StringBuffer buffer = new StringBuffer();
int i;
//文件原有内容
for(i=0;(temp =br.readLine())!=null;i++){
buffer.append(temp);
// 行与行之间的分隔符 相当于“\n”
buffer = buffer.append(System.getProperty("line.separator"));
}
for (int q = 0; q < list.size(); q++) {
buffer.append(list.get(q).getId()+",");
buffer.append(list.get(q).getTime_point()+",");
buffer.append(list.get(q).getAqi()+",");
buffer.append(list.get(q).getArea()+",");
buffer.append(list.get(q).getPosition_name()+",");
buffer.append(list.get(q).getStation_code()+",");
buffer.append(list.get(q).getSO2()+",");
buffer.append(list.get(q).getNO2()+",");
buffer.append(list.get(q).getCO()+",");
buffer.append(list.get(q).getO3()+",");
buffer.append(list.get(q).getPM2_5()+",");
buffer.append(list.get(q).getPM10()+",");
buffer.append(list.get(q).getPrimary_pollutant().replaceAll(",", ",")+",");
//逗号在csv文件中相当于tab键,每个字段后面加上逗号是分割单元格replaceAll(",", ",")是一个单元格中的数据存在逗号,将英文逗号替换成中文逗号,csv不解析,会直接按字符串处理,这
4000
样就不会换单元格了,文本中也会显示逗号,不影响正常的阅读。
buffer.append(list.get(q).getQuality()+" \r\n");
}
fos = new FileOutputStream(file);
pw = new PrintWriter(fos);
pw.write(buffer.toString().toCharArray());
pw.flush();
bool = true;
} catch (Exception e) {
e.printStackTrace();
}finally {
//不要忘记关闭
if (pw != null) {
pw.close();
}
if (fos != null) {
fos.close();
}
if (br != null) {
br.close();
}
if (isr != null) {
isr.close();
}
if (fis != null) {
fis.close();
}
}
return bool;
}
public void wenjian(page pg, String name){ //这是一次导数EXCLE文件
jxl.write.WritableWorkbook wwb = null;
try {
System.out.println("excel action wenjian name:"+name);
List<List<String>> list = pg.getListl();
File file = new File(url + ""+name+".xls");
System.out.println("url:"+file.getAbsolutePath()+"\n "+file.toString());
file.delete();
wwb = Workbook.createWorkbook(file);
WritableFont font3 = new WritableFont(
WritableFont.createFont("宋体"), 12, WritableFont.NO_BOLD);
WritableCellFormat f = new WritableCellFormat(font3);
jxl.write.WritableSheet ws = wwb.createSheet("Sheet1", 0);
ws.setColumnView(0, 45); // 设置列的宽度
ws.setColumnView(1, 20); // 设置列的宽度
ws.setColumnView(2, 30); // 设置列的宽度
ws.setColumnView(3, 15); // 设置列的宽度
ws.setColumnView(4, 15); // 设置列的宽度
ws.setColumnView(5, 15); // 设置列的宽度
ws.setColumnView(6, 15); // 设置列的宽度
ws.setColumnView(7, 15); // 设置列的宽度
ws.setColumnView(8, 15); // 设置列的宽度
ws.setColumnView(9, 15); // 设置列的宽度
ws.setColumnView(10, 30); // 设置列的宽度
ws.setColumnView(11, 30); // 设置列的宽度
for (int q = 0; q < list.size(); q++) {
for (int w = 1; w < list.get(q).size(); w++) {
if (!"0".equals(list.get(q).get(w))) {
jxl.write.Label labelC = new jxl.write.Label(w - 1, q,
list.get(q).get(w), f);
ws.addCell(labelC);
} else {
jxl.write.Label labelC = new jxl.write.Label(w - 1, q,
"-", f);
ws.addCell(labelC);
}
}
}
wwb.write();
wwb.close();
} catch (Exception e) {
try {
wwb.close();
} catch (Exception e1) {
e1.printStackTrace();
}
e.printStackTrace();
}
}
public void wenJianCsv(page pg, String name) { //导出csv文件
try {
System.out.println("pa:"+pg);
File file = new File(url + name + ".csv");
file.createNewFile();
List<List<String>> list = pg.getListl();
FileOutputStream stream;// provides file access
OutputStreamWriter writer;// writes to the file
stream = new FileOutputStream(file);
writer = new OutputStreamWriter(stream, "gb2312");
for (int q = 0; q < list.size(); q++) {
for (int w = 1; w < list.get(q).size(); w++) {
if (w == 1) {
if (!"0".equals(list.get(q).get(w))) {
writer.write(list.get(q).get(w));
} else {
writer.write("-");
}
} else {
if (!"0".equals(list.get(q).get(w))) {
writer.write("," + list.get(q).get(w));
} else {
writer.write("," + "-");
}
}
}
writer.write("\r\n");
}
writer.close();
stream.close();
} catch (IOException e1) {
} catch (Exception e) {
e.printStackTrace();
}
}
public void wenJianTxt(page pg, String name) { //导出text文件
try {
File file = new File(url + name + ".txt");
file.createNewFile();
List<List<String>> list = pg.getListl();
FileOutputStream stream;// provides file access
OutputStreamWriter writer;// writes to the file
stream = new FileOutputStream(file);
writer = new OutputStreamWriter(stream, "gb2312");
for (int q = 0; q < list.size(); q++) {
for (int w = 1; w < list.get(q).size(); w++) {
if (w == 1) {
if (!"0".equals(list.get(q).get(w))) {
writer.write(list.get(q).get(w));
} else {
writer.write("-");
}
} else {
if (!"0".equals(list.get(q).get(w))) {
writer.write("," + list.get(q).get(w));
} else {
writer.write("," + "-");
}
}
}
writer.write("\r\n");
}
writer.close();
} catch (IOException e1) {
} catch (Exception e) {
e.printStackTrace();
}
}
public Data getData() {
return data;
}
public void setData(Data data) {
this.data = data;
}
}
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.List;
import jxl.Workbook;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import com.hcycom.bean.MonthValue;
import com.hcycom.page.page;
import com.hcycom.service.Data;
public class Excel {
//static String url = "/opt/apache-tomcat-6.0.37/file/";
static String url = "D:/opt/apache-tomcat-6.0.37/file/";
Data data;
public void setExcel(String leixing, String name,page pg) {
if ("excel".equals(leixing)) {
wenjian(pg, name);
}
if ("cvs".equals(leixing)||"plCSV".equals(leixing)) {
wenJianCsv(pg, name);
}
if ("txt".equals(leixing)) {
wenJianTxt(pg, name);
}
}
public void setExcelCSV(String name,List<MonthValue> list) {
wenJianPLCsv(list, name);
}
public void wenJianPLCsv(List<MonthValue> list, String name) { //导出百万条数据name是文件名 list是数据
try {
File file = new File(url + name + ".csv");
if(!file.exists()){
System.out.println("创建文件!!!");
file.createNewFile();
}
writeFileContent(url + name + ".csv", list);
//writeFileContent()这个方法是分批往csv文件中追加数据 ,下面注释掉的是一次性往csv文件中写
数据
/*FileOutputStream stream;// provides file access
OutputStreamWriter writer;// writes to the file
stream = new FileOutputStream(file);
writer = new OutputStreamWriter(stream, "gb2312");
for (int q = 0; q < list.size(); q++) {
writer.write(list.get(q).getAqi());
writer.write(list.get(q).getSO2());
writer.write("\r\n");
}
writer.close();
stream.close();*/
} catch (IOException e1) {
e1.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public static boolean writeFileContent(String filepath,List<MonthValue> list) throws IOException{
Boolean bool = false;
String temp = "";
FileInputStream fis = null;
InputStreamReader isr = null;
BufferedReader br = null;
FileOutputStream fos = null;
PrintWriter pw = null;
try {
File file = new File(filepath);//文件路径(包括文件名称)
//将文件读入输入流
fis = new FileInputStream(file);
isr = new InputStreamReader(fis);
br = new BufferedReader(isr);
StringBuffer buffer = new StringBuffer();
int i;
//文件原有内容
for(i=0;(temp =br.readLine())!=null;i++){
buffer.append(temp);
// 行与行之间的分隔符 相当于“\n”
buffer = buffer.append(System.getProperty("line.separator"));
}
for (int q = 0; q < list.size(); q++) {
buffer.append(list.get(q).getId()+",");
buffer.append(list.get(q).getTime_point()+",");
buffer.append(list.get(q).getAqi()+",");
buffer.append(list.get(q).getArea()+",");
buffer.append(list.get(q).getPosition_name()+",");
buffer.append(list.get(q).getStation_code()+",");
buffer.append(list.get(q).getSO2()+",");
buffer.append(list.get(q).getNO2()+",");
buffer.append(list.get(q).getCO()+",");
buffer.append(list.get(q).getO3()+",");
buffer.append(list.get(q).getPM2_5()+",");
buffer.append(list.get(q).getPM10()+",");
buffer.append(list.get(q).getPrimary_pollutant().replaceAll(",", ",")+",");
//逗号在csv文件中相当于tab键,每个字段后面加上逗号是分割单元格replaceAll(",", ",")是一个单元格中的数据存在逗号,将英文逗号替换成中文逗号,csv不解析,会直接按字符串处理,这
4000
样就不会换单元格了,文本中也会显示逗号,不影响正常的阅读。
buffer.append(list.get(q).getQuality()+" \r\n");
}
fos = new FileOutputStream(file);
pw = new PrintWriter(fos);
pw.write(buffer.toString().toCharArray());
pw.flush();
bool = true;
} catch (Exception e) {
e.printStackTrace();
}finally {
//不要忘记关闭
if (pw != null) {
pw.close();
}
if (fos != null) {
fos.close();
}
if (br != null) {
br.close();
}
if (isr != null) {
isr.close();
}
if (fis != null) {
fis.close();
}
}
return bool;
}
public void wenjian(page pg, String name){ //这是一次导数EXCLE文件
jxl.write.WritableWorkbook wwb = null;
try {
System.out.println("excel action wenjian name:"+name);
List<List<String>> list = pg.getListl();
File file = new File(url + ""+name+".xls");
System.out.println("url:"+file.getAbsolutePath()+"\n "+file.toString());
file.delete();
wwb = Workbook.createWorkbook(file);
WritableFont font3 = new WritableFont(
WritableFont.createFont("宋体"), 12, WritableFont.NO_BOLD);
WritableCellFormat f = new WritableCellFormat(font3);
jxl.write.WritableSheet ws = wwb.createSheet("Sheet1", 0);
ws.setColumnView(0, 45); // 设置列的宽度
ws.setColumnView(1, 20); // 设置列的宽度
ws.setColumnView(2, 30); // 设置列的宽度
ws.setColumnView(3, 15); // 设置列的宽度
ws.setColumnView(4, 15); // 设置列的宽度
ws.setColumnView(5, 15); // 设置列的宽度
ws.setColumnView(6, 15); // 设置列的宽度
ws.setColumnView(7, 15); // 设置列的宽度
ws.setColumnView(8, 15); // 设置列的宽度
ws.setColumnView(9, 15); // 设置列的宽度
ws.setColumnView(10, 30); // 设置列的宽度
ws.setColumnView(11, 30); // 设置列的宽度
for (int q = 0; q < list.size(); q++) {
for (int w = 1; w < list.get(q).size(); w++) {
if (!"0".equals(list.get(q).get(w))) {
jxl.write.Label labelC = new jxl.write.Label(w - 1, q,
list.get(q).get(w), f);
ws.addCell(labelC);
} else {
jxl.write.Label labelC = new jxl.write.Label(w - 1, q,
"-", f);
ws.addCell(labelC);
}
}
}
wwb.write();
wwb.close();
} catch (Exception e) {
try {
wwb.close();
} catch (Exception e1) {
e1.printStackTrace();
}
e.printStackTrace();
}
}
public void wenJianCsv(page pg, String name) { //导出csv文件
try {
System.out.println("pa:"+pg);
File file = new File(url + name + ".csv");
file.createNewFile();
List<List<String>> list = pg.getListl();
FileOutputStream stream;// provides file access
OutputStreamWriter writer;// writes to the file
stream = new FileOutputStream(file);
writer = new OutputStreamWriter(stream, "gb2312");
for (int q = 0; q < list.size(); q++) {
for (int w = 1; w < list.get(q).size(); w++) {
if (w == 1) {
if (!"0".equals(list.get(q).get(w))) {
writer.write(list.get(q).get(w));
} else {
writer.write("-");
}
} else {
if (!"0".equals(list.get(q).get(w))) {
writer.write("," + list.get(q).get(w));
} else {
writer.write("," + "-");
}
}
}
writer.write("\r\n");
}
writer.close();
stream.close();
} catch (IOException e1) {
} catch (Exception e) {
e.printStackTrace();
}
}
public void wenJianTxt(page pg, String name) { //导出text文件
try {
File file = new File(url + name + ".txt");
file.createNewFile();
List<List<String>> list = pg.getListl();
FileOutputStream stream;// provides file access
OutputStreamWriter writer;// writes to the file
stream = new FileOutputStream(file);
writer = new OutputStreamWriter(stream, "gb2312");
for (int q = 0; q < list.size(); q++) {
for (int w = 1; w < list.get(q).size(); w++) {
if (w == 1) {
if (!"0".equals(list.get(q).get(w))) {
writer.write(list.get(q).get(w));
} else {
writer.write("-");
}
} else {
if (!"0".equals(list.get(q).get(w))) {
writer.write("," + list.get(q).get(w));
} else {
writer.write("," + "-");
}
}
}
writer.write("\r\n");
}
writer.close();
} catch (IOException e1) {
} catch (Exception e) {
e.printStackTrace();
}
}
public Data getData() {
return data;
}
public void setData(Data data) {
this.data = data;
}
}
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