1、工具类，目前暂不支持中文
package com.base;import mons.lang.StringUtils;import java.util.HashMap;import java.util.Map;public class PrintTable {public static void main(String[] args) {String[] heads = {"name", "gender", "age", "greed", "job"};String[][] data = {{"Jack", "male", "27", "college", "developer"}, {"Jim", "male", "32", "college", "manager"}};printTable(heads, data);}//按表格打印数据public static void printTable(String[] heads, String[][] data) {if (null == heads || heads.length <= 0) {throw new RuntimeException("标头heads[]不能为空!");}if (null == data || null == data[0] || data[0].length <= 0) {throw new RuntimeException("数据data[][]不能为空!");}if (heads.length != data[0].length) {throw new RuntimeException("标头与数据列数不一致!");}//数据列数int rowNum = heads.length;//数据行数int lineNum = data.length;//每列数据宽度Map<Integer, Integer> rowWidthMap = getRowWidthMap(rowNum, lineNum, heads, data);//打印表头printHead(rowNum, rowWidthMap, heads);//打印数据printData(rowNum, lineNum, rowWidthMap, data);}//获取列宽度-每列取最大public static Map<Integer, Integer> getRowWidthMap(int rowNum, int lineNum, String[] heads, String[][] data) {Map<Integer, Integer> rowWidthMap = new HashMap<>();//先记入表头各列宽度for (int i = 0; i < rowNum; i++) {int len = length(heads[i]);if (null == rowWidthMap.get(i)) {rowWidthMap.put(i, len);} else if (rowWidthMap.get(i) < len) {rowWidthMap.put(i, len);}}//比较并记入数据的最大宽度for (int i = 0; i < lineNum; i++) {for (int j = 0; j < rowNum; j++) {int len = length(data[i][j]);//System.out.println("[" + i + "," + j + "]:" + data[i][j] + ",width：" + len);if (null == rowWidthMap.get(j)) {rowWidthMap.put(j, len);} else if (rowWidthMap.get(j) < len) {rowWidthMap.put(j, len);}}}return rowWidthMap;}//打印表格中的横线public static void printLine(int rowNum, Map<Integer, Integer> map) {for (int i = 0; i < rowNum; i++) {int len = map.get(i);System.out.print("+");for (int k = 0; k < len; k++) {System.out.print("-");}}System.out.print("+");System.out.println();}public static int length(String str) {if (StringUtils.isBlank(str)) {return 0;}return str.length();}//打印表头内容public static void printHead(int rowNum, Map<Integer, Integer> rowWidthMap, String[] heads) {printLine(rowNum, rowWidthMap);for (int h = 0; h < rowNum; h++) {System.out.print("|");int actLength = rowWidthMap.get(h);int dataLength = length(heads[h]);executePrintData(actLength, dataLength, heads[h]);if (h == rowNum - 1) {System.out.print("|");}}System.out.println();printLine(rowNum, rowWidthMap);}//打印表数据public static void printData(int rowNum, int lineNum, Map<Integer, Integer> rowWidthMap, String[][] data) {for (int j = 0; j < lineNum; j++) {for (int i = 0; i < rowNum; i++) {System.out.print("|");int dataLength = length(data[j][i]);int actLength = rowWidthMap.get(i);executePrintData(actLength, dataLength, data[j][i]);if (i == rowNum - 1) {System.out.print("|");}}System.out.println();printLine(rowNum, rowWidthMap);}System.out.println();}//执行打印数据public static void executePrintData(int actLength, int dataLength, String data) {if (actLength > dataLength) {int num = actLength - dataLength;if (num == 1) {System.out.print(data);System.out.print(" ");} else {int beforeNum = num / 2;int afterNum = num - beforeNum;for (int m = 0; m < beforeNum; m++) {System.out.print(" ");}System.out.print(data);for (int m = 0; m < afterNum; m++) {System.out.print(" ");}}} else {System.out.print(data);}}}
2、打印输出
+----+------+---+-------+---------+|name|gender|age| greed | job |+----+------+---+-------+---------+|Jack| male |27 |college|developer|+----+------+---+-------+---------+|Jim | male |32 |college| manager |+----+------+---+-------+---------+
