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如何在java中存儲(chǔ)表格數(shù)據(jù)?相信很多沒有經(jīng)驗(yàn)的人對(duì)此束手無(wú)策,為此本文總結(jié)了問題出現(xiàn)的原因和解決方法,通過這篇文章希望你能解決這個(gè)問題。
一、二維數(shù)組實(shí)現(xiàn)表格數(shù)據(jù)的存儲(chǔ)
import java.util.Arrays; /** * 使用Object[][]存儲(chǔ)表格信息 * @author Lhk * */ public class Array_Test01 { public static void main(String args[]){ //一個(gè)Object[]數(shù)組代表表格的一行數(shù)據(jù) //此處的基本數(shù)據(jù)類型1001,1002,1003本質(zhì)不是Object對(duì)象,Java編譯會(huì)自動(dòng)把基本數(shù)據(jù)類型“自動(dòng)裝箱”成包裝類對(duì)象 Object[] emp0={1001,"明明",20,"程序員","2021-03-28"}; Object[] emp1={1002,"花花",21,"程序員","2021-02-28"}; Object[] emp2={1002,"小李",19,"程序員","2021-04-01"}; Object[][] emps=new Object[3][]; emps[0]=emp0; emps[1]=emp1; emps[2]=emp2; //遍歷數(shù)組(可用嵌套循環(huán)遍歷多維數(shù)組),輸出表格 for(int i=0;i<emps.length;i++){ System.out.println(Arrays.toString(emps[i])); } } }
import java.util.Arrays; /** * 使用javabean和數(shù)組存儲(chǔ)表格信息 * @author Lhk * */ public class Array_Test02 { public static void main(String args[]) { Emps emp0=new Emps(1001,"明明",20,"程序員","2021-03-28"); Emps emp1=new Emps(1002,"花花",21,"程序員","2021-02-28"); Emps emp2=new Emps(1002,"小李",19,"程序員","2021-04-01"); Emps[] emps={emp0,emp1,emp2};//靜態(tài)初始化 for(int i=0;i<emps.length;i++){ System.out.println(emps[i].toString()); } } } class Emps { private int id; private String name; private int age; private String job; private String hiretime; public Emps(int id, String name, int age, String job, String hiretime) { super(); this.id = id; this.name = name; this.age = age; this.job = job; this.hiretime = hiretime; } public Emps() { super(); } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getJob() { return job; } public void setJob(String job) { this.job = job; } public String getHiretime() { return hiretime; } public void setHiretime(String hiretime) { this.hiretime = hiretime; } @Override public String toString() { //重寫toString()方法可以用get方法來返回屬性 return "emps [id=" + getId() + ", name=" + getName() + ", age=" + getAge() + ", job=" + getJob() + ", Hiretime=" + getHiretime() + "]"; } }
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