!187 为Console增加打印表格的方法

Merge pull request !187 from sypro/为Console增加打印表格的方法

hutool-core/src/main/java/cn/hutool/core/lang/ConsoleTableUtil.java

@@ -0,0 +1,158 @@
+package cn.hutool.core.lang;
+
+import cn.hutool.core.convert.Convert;
+import cn.hutool.core.util.StrUtil;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * 控制台打印表格工具
+ *
+ * @author 孙宇
+ */
+public class ConsoleTableUtil {
+    /**
+     * 每列最大字符个数
+     */
+    private List<Integer> columnCharNumber;
+    /**
+     * 表格头信息
+     */
+    private List<List<String>> headerList = new ArrayList<>();
+    /**
+     * 表格体信息
+     */
+    private List<List<String>> bodyList = new ArrayList<>();
+
+    /**
+     * 添加头信息
+     *
+     * @param columns 列名
+     * @return 自身对象
+     */
+    public ConsoleTableUtil addHeader(String... columns) {
+        columnCharNumber = new ArrayList<>(Collections.nCopies(columns.length, 0));
+        List<String> l = new ArrayList<>();
+        headerList.add(l);
+        for (int i = 0; i < columns.length; i++) {
+            String column = columns[i];
+            String col = Convert.toSBC(column);
+            l.add(col);
+            int width = col.length();
+            columnCharNumber.set(i, width);
+        }
+        return this;
+    }
+
+    /**
+     * 添加体信息
+     *
+     * @param values 列值
+     * @return 自身对象
+     */
+    public ConsoleTableUtil addBody(String... values) {
+        List<String> l = new ArrayList<>();
+        bodyList.add(l);
+        for (int i = 0; i < values.length; i++) {
+            String value = values[i];
+            String val = Convert.toSBC(value);
+            l.add(val);
+            int width = val.length();
+            if (width > columnCharNumber.get(i)) {
+                columnCharNumber.set(i, width);
+            }
+        }
+        return this;
+    }
+
+    /**
+     * 获取表格字符串
+     *
+     * @return 表格字符串
+     */
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        border(sb);
+        for (List<String> headers : headerList) {
+            for (int i = 0; i < headers.size(); i++) {
+                if (i == 0) {
+                    sb.append('|');
+                }
+                String header = headers.get(i);
+                sb.append(Convert.toSBC(" "));
+                sb.append(header);
+                sb.append(Convert.toSBC(" "));
+                int l = header.length();
+                int lw = columnCharNumber.get(i);
+                if (lw > l) {
+                    for (int j = 0; j < (lw - l); j++) {
+                        sb.append(Convert.toSBC(" "));
+                    }
+                }
+                sb.append('|');
+            }
+            sb.append('\n');
+        }
+        border(sb);
+        for (List<String> bodys : bodyList) {
+            for (int i = 0; i < bodys.size(); i++) {
+                if (i == 0) {
+                    sb.append('|');
+                }
+                String body = bodys.get(i);
+                sb.append(Convert.toSBC(" "));
+                sb.append(body);
+                sb.append(Convert.toSBC(" "));
+                int l = body.length();
+                int lw = columnCharNumber.get(i);
+                if (lw > l) {
+                    for (int j = 0; j < (lw - l); j++) {
+                        sb.append(Convert.toSBC(" "));
+                    }
+                }
+                sb.append('|');
+            }
+            sb.append('\n');
+        }
+        border(sb);
+        return sb.toString();
+    }
+
+    private void border(StringBuilder sb) {
+        sb.append('*');
+        for (Integer width : columnCharNumber) {
+            sb.append(Convert.toSBC(StrUtil.fillAfter("", '-', width + 2)));
+            sb.append('*');
+        }
+        sb.append('\n');
+    }
+
+    public void print() {
+        Console.print(toString());
+    }
+
+    public static void main(String[] args) {
+        ConsoleTableUtil t = new ConsoleTableUtil();
+        t.addHeader("姓名", "年龄");
+        t.addBody("张三", "15");
+        t.addBody("李四", "29");
+        t.addBody("王二麻子", "37");
+        t.print();
+
+        t = new ConsoleTableUtil();
+        t.addHeader("体温", "占比");
+        t.addHeader("℃", "%");
+        t.addBody("36.8", "10");
+        t.addBody("37", "5");
+        t.print();
+
+        t = new ConsoleTableUtil();
+        t.addHeader("标题1", "标题2");
+        t.addBody("12345", "混合321654asdfcSDF");
+        t.addBody("sd   e3ee  ff22", "ff值");
+        t.print();
+    }
+
+}