java使用echarts需要导入哪些包

发布网友 发布时间：2022-05-12 07:45

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热心网友 时间：2022-04-27 09:03

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;
public class AddList {

private String filePath = "";
private String bakPath = "";
private String content = "";

Scanner sc = new Scanner(System.in);

public String readFile(){
content = "";
if (isNull(filePath)) {
System.out.println("
文件
存储
路径：
");
filePath = sc.nextLine();
}
File file = new File(filePath);
FileReader fr = null;
try {
if (file.exists()) {
fr = new FileReader(file);
char[] chars = new char[1024];
int n = 0;
while((n = fr.read(chars)) != -1){
String string = new String(chars, 0, n);
content = content + string;
}
} else {
System.out.println("
文件不存在
");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fr != null) {
try {
fr.close();
} catch (IOException e) {
e.printStackTrace();
}

}
}
return content;
}

public void writeFile(String path){
File file = new File(path);
FileOutputStream fos = null;
mkDirs(path);
try {
fos = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fos);
PrintWriter pw = new PrintWriter(bos, true);
pw.print(content);
pw.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

public void writeFile(){
if (isNull(filePath)) {
System.out.println("
文件存储路径：
");
filePath = sc.nextLine();
}
File file = new File(filePath);
FileOutputStream fos = null;
mkDirs(filePath);
try {
fos = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fos);
PrintWriter pw = new PrintWriter(bos, true);
pw.print(content);
pw.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if (fos != null) {

try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

public void mkDirs(String filepath){
if (filepath.indexOf("\\") != -1) {
filepath = filepath.replaceAll("\\", "/");
}
int n = filepath.indexOf("//");
String path = filepath.substring(0, n) + "//";
filepath = filepath.substring(filepath.indexOf("//") + 1, filepath.length());
String[] files = filepath.split("/");
for (int i = 0; i < files.length - 1; i++) {
path = path + files[i];
File file = new File(path);
if (!file.exists()) {
file.mkdir();
}
}
}

public void addImfor(){
System.out.println("--------
增加记录
---------");
String name = "";
String tel = "";
String email = "";
content = readFile();
while(true){
System.out.println("
姓名：
");
name = sc.next();
System.out.println("
电话：
");
tel = sc.next();
System.out.println("Email
：
");
email = sc.next();
content = content + name + "<>" + tel + "<>" + email +"<==>";
System.out.println("0
、
Exit 1
、继续
");
int i = sc.nextInt();
if (i == 0) {
break;
}
}