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Java 将部门层次结构打印到表中_Java_Sql_Algorithm_Hierarchy - Fatal编程技术网

Java 将部门层次结构打印到表中

Java 将部门层次结构打印到表中,java,sql,algorithm,hierarchy,Java,Sql,Algorithm,Hierarchy,我有一个部门关系表,如下所示: +---------------+----------------+ | Dept. | superior Dept. | +---------------+----------------+ | "00-01" | "00" | | "00-02" | "00" | | "00-01-01" | "00-01" | | "00-01-02" | "00-01

我有一个部门关系表,如下所示:

+---------------+----------------+
|     Dept.     | superior Dept. |
+---------------+----------------+
| "00-01"       | "00"           |
| "00-02"       | "00"           |
| "00-01-01"    | "00-01"        |
| "00-01-02"    | "00-01"        |
| "00-01-03"    | "00-01"        |
| "00-02-01"    | "00-02"        |
| "00-02-03"    | "00-02"        |
| "00-02-03-01" | "00-02-03"     |
+---------------+----------------+
现在,我想按照它们的层次列出它们,如下所示:

+-----------+--------------+--------------+--------------+
| Top Dept. | 2-tier Dept. | 3-tire Dept. | 4-tier Dept. |
+-----------+--------------+--------------+--------------+
|        00 |              |              |              |
|           | 00-01        |              |              |
|           |              | 00-01-01     |              |
|           |              | 00-01-02     |              |
|           | 00-02        |              |              |
|           |              | 00-02-01     |              |
|           |              | 00-02-03     |              |
|           |              |              | 00-02-03-01  |
+-----------+--------------+--------------+--------------+
我可以使用下面的代码构建关系树:
TreeNode.java

import java.util.LinkedList;
import java.util.List;

public class TreeNode {
  public String value;
  public List children = new LinkedList();

  public TreeNode(String rootValue) {
    value = rootValue;
  }

}
import java.util.*;

public class PairsToTree {

  public static void main(String[] args) throws Exception {
    // Create the child to parent hash map
    Map <String, String> childParentMap = new HashMap<String, String>(8);
    childParentMap.put("00-01", "00");
    childParentMap.put("00-02", "00");
    childParentMap.put("00-01-01", "00-01");
    childParentMap.put("00-01-02", "00-01");
    childParentMap.put("00-01-03", "00-01");
    childParentMap.put("00-02-01", "00-02");
    childParentMap.put("00-02-03", "00-02");
    childParentMap.put("00-02-03-01", "00-02-03");

    // All children in the tree
    Collection<String> children = childParentMap.keySet();

    // All parents in the tree
    Collection<String> values = childParentMap.values();

    // Using extra space here as any changes made to values will
    // directly affect the map
    Collection<String> clonedValues = new HashSet();
    for (String value : values) {
      clonedValues.add(value);
    }

    // Find parent which is not a child to any node. It is the
    // root node
    clonedValues.removeAll(children);

    // Some error handling
    if (clonedValues.size() != 1) {
      throw new Exception("More than one root found or no roots found");
    }

    String rootValue = clonedValues.iterator().next();
    TreeNode root = new TreeNode(rootValue);

    HashMap<String, TreeNode> valueNodeMap = new HashMap();
    // Put the root node into value map as it will not be present
    // in the list of children
    valueNodeMap.put(root.value, root);

    // Populate all children into valueNode map
    for (String child : children) {
      TreeNode valueNode = new TreeNode(child);
      valueNodeMap.put(child, valueNode);
    }

    // Now the map contains all nodes in the tree. Iterate through
    // all the children and
    // associate them with their parents
    for (String child : children) {
      TreeNode childNode = valueNodeMap.get(child);
      String parent = childParentMap.get(child);
      TreeNode parentNode = valueNodeMap.get(parent);
      parentNode.children.add(childNode);
    }

    // Traverse tree in level order to see the output. Pretty
    // printing the tree would be very
    // long to fit here.
    Queue q1 = new ArrayDeque();
    Queue q2 = new ArrayDeque();
    q1.add(root);
    Queue<TreeNode> toEmpty = null;
    Queue toFill = null;
    while (true) {
      if (false == q1.isEmpty()) {
        toEmpty = q1;
        toFill = q2;
      } else if (false == q2.isEmpty()) {
        toEmpty = q2;
        toFill = q1;
      } else {
        break;
      }
      while (false == toEmpty.isEmpty()) {
        TreeNode node = toEmpty.poll();
        System.out.print(node.value + ", ");
        toFill.addAll(node.children);
      }
      System.out.println("");
    }
  }

}
PairsToTree.java

import java.util.LinkedList;
import java.util.List;

public class TreeNode {
  public String value;
  public List children = new LinkedList();

  public TreeNode(String rootValue) {
    value = rootValue;
  }

}
import java.util.*;

public class PairsToTree {

  public static void main(String[] args) throws Exception {
    // Create the child to parent hash map
    Map <String, String> childParentMap = new HashMap<String, String>(8);
    childParentMap.put("00-01", "00");
    childParentMap.put("00-02", "00");
    childParentMap.put("00-01-01", "00-01");
    childParentMap.put("00-01-02", "00-01");
    childParentMap.put("00-01-03", "00-01");
    childParentMap.put("00-02-01", "00-02");
    childParentMap.put("00-02-03", "00-02");
    childParentMap.put("00-02-03-01", "00-02-03");

    // All children in the tree
    Collection<String> children = childParentMap.keySet();

    // All parents in the tree
    Collection<String> values = childParentMap.values();

    // Using extra space here as any changes made to values will
    // directly affect the map
    Collection<String> clonedValues = new HashSet();
    for (String value : values) {
      clonedValues.add(value);
    }

    // Find parent which is not a child to any node. It is the
    // root node
    clonedValues.removeAll(children);

    // Some error handling
    if (clonedValues.size() != 1) {
      throw new Exception("More than one root found or no roots found");
    }

    String rootValue = clonedValues.iterator().next();
    TreeNode root = new TreeNode(rootValue);

    HashMap<String, TreeNode> valueNodeMap = new HashMap();
    // Put the root node into value map as it will not be present
    // in the list of children
    valueNodeMap.put(root.value, root);

    // Populate all children into valueNode map
    for (String child : children) {
      TreeNode valueNode = new TreeNode(child);
      valueNodeMap.put(child, valueNode);
    }

    // Now the map contains all nodes in the tree. Iterate through
    // all the children and
    // associate them with their parents
    for (String child : children) {
      TreeNode childNode = valueNodeMap.get(child);
      String parent = childParentMap.get(child);
      TreeNode parentNode = valueNodeMap.get(parent);
      parentNode.children.add(childNode);
    }

    // Traverse tree in level order to see the output. Pretty
    // printing the tree would be very
    // long to fit here.
    Queue q1 = new ArrayDeque();
    Queue q2 = new ArrayDeque();
    q1.add(root);
    Queue<TreeNode> toEmpty = null;
    Queue toFill = null;
    while (true) {
      if (false == q1.isEmpty()) {
        toEmpty = q1;
        toFill = q2;
      } else if (false == q2.isEmpty()) {
        toEmpty = q2;
        toFill = q1;
      } else {
        break;
      }
      while (false == toEmpty.isEmpty()) {
        TreeNode node = toEmpty.poll();
        System.out.print(node.value + ", ");
        toFill.addAll(node.children);
      }
      System.out.println("");
    }
  }

}
import java.util.*;
公共类对树{
公共静态void main(字符串[]args)引发异常{
//创建子到父散列映射
Map childParentMap=newhashmap(8);
childParentMap.put(“00-01”、“00”);
childParentMap.put(“00-02”、“00”);
childParentMap.put(“00-01-01”、“00-01”);
childParentMap.put(“00-01-02”、“00-01”);
childParentMap.put(“00-01-03”、“00-01”);
childParentMap.put(“00-02-01”、“00-02”);
childParentMap.put(“00-02-03”、“00-02”);
childParentMap.put(“00-02-03-01”、“00-02-03”);
//树上所有的孩子
Collection children=childParentMap.keySet();
//树上所有的父母
集合值=childParentMap.values();
//在此处使用额外空间,因为对值所做的任何更改都将
//直接影响地图
Collection clonedValues=new HashSet();
for(字符串值:值){
克隆值。添加(值);
}
//查找不是任何节点的子节点的父节点。它是
//根节点
clonedValues.removeAll(儿童);
//一些错误处理
if(clonedValues.size()!=1){
抛出新异常(“找到多个根或未找到根”);
}
String rootValue=clonedValues.iterator().next();
树节点根=新树节点(根值);
HashMap valueNodeMap=新HashMap();
//将根节点放入值映射中,因为它将不存在
//在儿童名单上
valueNodeMap.put(root.value,root);
//将所有子项填充到valueNode映射中
for(字符串子项:子项){
TreeNode valueNode=新的TreeNode(子节点);
valueNodeMap.put(子级,valueNode);
}
//现在,映射包含树中的所有节点
//所有的孩子和孩子
//把他们和他们的父母联系起来
for(字符串子项:子项){
TreeNode childNode=valueNodeMap.get(子节点);
字符串parent=childParentMap.get(child);
TreeNode parentNode=valueNodeMap.get(父节点);
parentNode.children.add(childNode);
}
//按级别遍历树以查看输出
//打印这棵树会非常困难
//很想适应这里。
队列q1=new ArrayDeque();
队列q2=新的ArrayQueue();
q1.添加(根);
Queue toEmpty=null;
队列toFill=null;
while(true){
if(false==q1.isEmpty()){
toEmpty=q1;
toFill=q2;
}else if(false==q2.isEmpty()){
toEmpty=q2;
toFill=q1;
}否则{
打破
}
while(false==toEmpty.isEmpty()){
TreeNode节点=toEmpty.poll();
系统输出打印(node.value+“,”);
toFill.addAll(node.children);
}
System.out.println(“”);
}
}
}
但是我想不出来 了解如何将输出格式化为类似于表。或者是否有sql语句/存储过程(如)来执行此操作


编辑:为了方便起见,部门名称只是一个示例,可以是任意字符串。

检查值计数
-
字符。最大
-
字符数+1是表列数。值大小是行计数

您可以为表定义矩阵,例如
String[][]

对于每个值,您可以找到列(计算字符串值中的
-
字符)。 现在要查找行,您应该检查上一列以查找父字符串

如果找到了,只需在找到的父行之后插入新行,并向下移动所有剩余行

如果未找到父字符串,请首先插入父字符串(基于childParentMap)

如果parent为null,只需在末尾插入新行。

import java.util.LinkedList;
import java.util.LinkedList;
import java.util.List;

public class TreeNode {
  private String value;
  private int depth;
  private List children = new LinkedList<TreeNode>();

  public TreeNode(String rootValue, int depth) {
      value = rootValue;
      this.depth = depth;
  }


  public boolean add(String parent, String child) {
      if (this.value.equals(parent)) {
          this.children.add(new TreeNode(child, depth + 1));
          return true;
      } else {
          for (TreeNode node : children) {
              if (node.add(parent, child)) {
                  return true;
              }
          }
      }
      return false;
  }

  public String print() {
      StringBuilder sb = new StringBuilder();
      sb.append(format());
      for (TreeNode child : children) {
          sb.append(child.print())
      }
      return sb.toString();
  }

  public String format() {
      // Format this node according to depth;
  }

}
导入java.util.List; 公共级树节点{ 私有字符串值; 私有整数深度; private List children=new LinkedList(); 公共树节点(字符串根值,int深度){ 值=根值; 这个。深度=深度; } 公共布尔添加(字符串父项、字符串子项){ 如果(此.value.equals(父级)){ 添加(新的TreeNode(child,depth+1)); 返回true; }否则{ for(TreeNode节点:子节点){ if(node.add(父节点、子节点)){ 返回true; } } } 返回false; } 公共字符串打印(){ StringBuilder sb=新的StringBuilder(); sb.append(format()); for(TreeNode儿童:儿童){ sb.append(child.print()) } 使某人返回字符串(); } 公共字符串格式(){ //根据深度设置该节点的格式; } }

首先打印Top Dept,然后在Top Dept上调用print()。

这是一个基于数据的测试用例,它以表格的方式打印部门,试着运行它,看看会发生什么

package test;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class DeptHierachy {
    public Map<String,List<String>> deptMap= new HashMap<>();
    public static void main(String[] args) {
        TreeNode tn=new TreeNode("00");
        tn.addChildTo("00-01", "00");
        tn.addChildTo("00-02", "00");
        tn.addChildTo("00-01-01", "00-01");
        tn.addChildTo("00-01-02", "00-01");
        tn.addChildTo("00-01-03", "00-01");
        tn.addChildTo("00-02-01", "00-02");
        tn.addChildTo("00-02-03", "00-02");
        tn.addChildTo("00-02-03-01", "00-02-03");
        tn.print();
        //System.out.println("max height=" + tn.maxHeigth());
    }



    public static class TreeNode {
          public String value;
          public List<TreeNode> children = new LinkedList<>();

          public TreeNode(String rootValue) {
            value = rootValue;
          }

          public boolean addChildTo(String childName, String parentName) {
              if (parentName.equals(value)) {
                  for (TreeNode child:children) {
                      if (child.getValue().equals(childName)) {
                          throw new IllegalArgumentException(parentName + " already has a child named " + childName);
                      }
                  }
                  children.add(new TreeNode(childName));
                  return true;
              } else {
                  for (TreeNode child:children) {
                      if (child.addChildTo(childName, parentName)) {
                          return true;
                      }
                  }
              }
              return false;
          }

        public String getValue() {
            return value;
        }

        public void print() {
            int maxHeight=maxHeigth();
            System.out.printf("|%-20.20s",value);

            for (int i=0;i<maxHeight-1;i++) {
                System.out.printf("|%-20.20s","");
            }
            System.out.println("|");
            for (TreeNode child:children) {
                child.print(1,maxHeight);
            }
        }

        public void print(int level, int maxHeight) {
            for (int i=0;i<level;i++) {
                System.out.printf("|%-20.20s","");
            }
            System.out.printf("|%-20.20s",value);
            for (int i=level;i<maxHeight-1;i++) {
                System.out.printf("|%-20.20s","");
            }
            System.out.println("|");
            for (TreeNode child:children) {
                child.print(level+1,maxHeight);
            }
        }

        public int maxHeigth() {
            int localMaxHeight=0;
            for (TreeNode child:children) {
                int childHeight = child.maxHeigth();
                if (localMaxHeight < childHeight) {
                    localMaxHeight = childHeight;
                }
            }
            return localMaxHeight+1;
        }
    }   

}
封装测试;
导入java.util.HashMap;
导入java.util.LinkedList;
导入java.util.List;
导入java.util.Map;
公众阶级的堕落{
publicmap deptMap=newhashmap();
公共静态void main(字符串[]args){
TreeNode tn=新的TreeNode(“00”);
tn.addChildTo(“00-01”、“00”);
tn.addChildTo(“00-02”、“00”);
tn.addChildTo(“00-01-01”、“00-01”);
tn.addChildTo(“00-01-02”、“00-01”);
tn.addChildTo(“00-01-03”、“00-01”);
tn.addChildTo(“00-02-01”、“00-02”);
tn.addChildTo(“00-02-03”、“00-02”);
tn.addChildTo(“00-02-03-01”、“00-02-03”);
tn.print();
//System.out.println(“最大高度=+tn.maxHeigth());
}
公共静态类树节点{
公共字符串值;
public List children=new LinkedList();
公共树节点(字符串根值){
值=根值;
 TopTier    Tier2   Tier3     Tier4
 00 
            00-01   
                    00-01-01
                    00-01-02
                    00-01-03
            00-02
                    00-02-01
                    00-02-03
                              00-02-03-01