[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; KM_)7?`
} []=FZ`4
int i1=l; C NzSBm
int i2=mid+1; cy&
for(int cur=l;cur<=r;cur++){ yRq8;@YGY
if(i1==mid+1) u]1-h6
data[cur]=temp[i2++]; }P&1s,S8J#
else if(i2>r) m0BG9~p|
data[cur]=temp[i1++]; uFrJ:l+
else if(temp[i1] data[cur]=temp[i1++]; A{i][1N
else x;ERRK
data[cur]=temp[i2++]; $vgmoJ@X0
} 5S|}:~7T
} q*F~~J!P
(5Z8zNH`3
} 8g# c%eZ
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改进后的归并排序: V(lK`dY
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package org.rut.util.algorithm.support; YoV^xl6g
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import org.rut.util.algorithm.SortUtil; e-%7F]e
k lP{yxU'n
/** xI`Uk8-8
* @author treeroot |iwM9oO%
* @since 2006-2-2 %S >xSqX
* @version 1.0 _ bXVg3oDt
*/ ,yHzo
public class ImprovedMergeSort implements SortUtil.Sort { pjX%LsX\
(6ohrM>Q
private static final int THRESHOLD = 10; &#vk4C_8m
7GBZA=J
/* Q>}eIQ Y
* (non-Javadoc) A=v lC?&Z
* j{Yt70Wv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jpYw#]Q
*/ fH#F"^A
public void sort(int[] data) { <?>I\
int[] temp=new int[data.length]; ny!lja5[
mergeSort(data,temp,0,data.length-1); :Bx+WW&P.i
} <t?x 'r?@
0%h[0jGj
private void mergeSort(int[] data, int[] temp, int l, int r) { ; d, JN
int i, j, k; KA|&Q<<{@
int mid = (l + r) / 2; 27Kc-rcB
if (l == r) |MOn0*
return; Xmf
if ((mid - l) >= THRESHOLD) $n=W2WJ6f
mergeSort(data, temp, l, mid); <O,'5+zG%
else ++Rdv0~
insertSort(data, l, mid - l + 1); M&|sR+$^
if ((r - mid) > THRESHOLD) S4l)TtY
mergeSort(data, temp, mid + 1, r); dJdD"xj
else G zJ9N`
insertSort(data, mid + 1, r - mid); {+@ms$z
QmWC2$b
for (i = l; i <= mid; i++) { wo7N7R5
temp = data; ['51FulDR
} $?]@_=
for (j = 1; j <= r - mid; j++) { F9m2C'U
temp[r - j + 1] = data[j + mid]; Ur_S [I
} jsk:fh0~M
int a = temp[l]; ]6a/0rg:t
int b = temp[r]; Ek"YM[
for (i = l, j = r, k = l; k <= r; k++) { \S=XIf
if (a < b) { |uQn|"U4
data[k] = temp[i++]; qO:U]\P
a = temp; \&eY)^vw
} else { =gMaaGg p,
data[k] = temp[j--]; '+)6#/*
b = temp[j]; ^#a#<8Jz
} VRtbHam
} &%|xc{i
} i;[h 9=\/
x\Nhix}1D
/** D 7Gd%
* @param data f0-RhR
* @param l &q," !:L]
* @param i >QYh}Z-/%
*/ ;el]LnV!O
private void insertSort(int[] data, int start, int len) { 5S&aI{;9<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q Axf5
} L]c 8d
} q6;OS.f
} lSZ"y Q+
} + $k07mb\
O]e6i%?
堆排序： )HJK '@
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package org.rut.util.algorithm.support; RtW4n:c
>[Xm|A#
import org.rut.util.algorithm.SortUtil; 2.StG(Y!
_Ct}%-,4
/** H"Q(2I
* @author treeroot 3mpP|b"
* @since 2006-2-2 {M`
* @version 1.0 L\QQjI{
*/ qJ\X~5{
public class HeapSort implements SortUtil.Sort{ Z7`5x
8pXfT%]
/* (non-Javadoc) mBw2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1zdYBb6;j
*/ \1=T sU&^
public void sort(int[] data) { rER~P\-
MaxHeap h=new MaxHeap(); f2uZK!:m
h.init(data); UqD5 A~w
for(int i=0;i h.remove(); fdd~e52f
System.arraycopy(h.queue,1,data,0,data.length); PLO\L W
} "F&Tnhh4
LTg?5GwD\j
private static class MaxHeap{ \ua9thOG
kFS0i%Sr
void init(int[] data){ QH& %mr.S
this.queue=new int[data.length+1]; qsI{ b<n
for(int i=0;i queue[++size]=data; |!$ Q<-]f
fixUp(size); p])D)FsMB
} {&u Rd?(
} k%"$$uo
]MC/t5vCu
private int size=0; 6o$Z0mG
iYkRo>3!QX
private int[] queue; "EJ\]S]$X
OZ eiHX!
public int get() { 8r2XGR
return queue[1]; ,yTN$K%M
} {;U}:Dx
w+Ad$4Pf"
public void remove() { G"}qV%"6"
SortUtil.swap(queue,1,size--); )$MS 0[?
fixDown(1); Jm?l59bv v
} (&q@~ dJ
file://fixdown w#W5}i&x
private void fixDown(int k) { AdDQWJ^r
int j; t$aVe"uM
while ((j = k << 1) <= size) { |__d 8a
if (j < size %26amp;%26amp; queue[j] j++; H!p!sn
if (queue[k]>queue[j]) file://不用交换 %(fL?
break; |d5ggf.w
SortUtil.swap(queue,j,k); Q%rVo4M#2
k = j; k"t>He
} C,[L/!
} P~&O4['<
private void fixUp(int k) { TLy;4R2Nn
while (k > 1) { QyTh!QM~`
int j = k >> 1; h!QjpzQe
if (queue[j]>queue[k]) x]H3Y3
break; ^GN5vT+:'
SortUtil.swap(queue,j,k); `hzd|GmX
k = j; ]OUD5T
} c qv.dC
} %cS#+aK6M'
nZe\5`
} AmZuo_
bG52s
} ~Hs=z$
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SortUtil： HTw#U2A;+
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package org.rut.util.algorithm; KvGbDG
S45'j(S=
import org.rut.util.algorithm.support.BubbleSort; OthG7+eF
import org.rut.util.algorithm.support.HeapSort; /\~l1.6`
import org.rut.util.algorithm.support.ImprovedMergeSort; R;%^j=Q
import org.rut.util.algorithm.support.ImprovedQuickSort; NOV.Bs{ yL
import org.rut.util.algorithm.support.InsertSort; 8:~b &>
import org.rut.util.algorithm.support.MergeSort; miPmpu!
import org.rut.util.algorithm.support.QuickSort; FWIih5 3`
import org.rut.util.algorithm.support.SelectionSort; L+Eu d
import org.rut.util.algorithm.support.ShellSort; 9wzwY[{
!`Le`c
/** b"^\)|*4;
* @author treeroot Xp#~N_S$
* @since 2006-2-2 /GyEVCc
* @version 1.0 o94PI*.
*/ Ohc^d"[7
public class SortUtil { hRk,vB]
public final static int INSERT = 1; _<XgC\4O|
public final static int BUBBLE = 2; k/U>N|5
public final static int SELECTION = 3; B+|IZoR
public final static int SHELL = 4; 2f `&WUe
public final static int QUICK = 5; -W9gH
public final static int IMPROVED_QUICK = 6; 9g96 d-
public final static int MERGE = 7; ci;&CHa
public final static int IMPROVED_MERGE = 8; -7&?@M,u
public final static int HEAP = 9; Ny]lvgu9X
r-*l1([eW
public static void sort(int[] data) { Rw/Ciw2@?
sort(data, IMPROVED_QUICK); N_0pO<<cs
} ::ri3Tu
private static String[] name={ O6/xPeak
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c+H)ed>
}; wBLsz/
ZH!;z-R
private static Sort[] impl=new Sort[]{ }H5/3be
new InsertSort(), hc"6u\>
new BubbleSort(), <M=';h^w2
new SelectionSort(), GZ <nXU>
new ShellSort(), W|0My0y
new QuickSort(), sSNCosb
new ImprovedQuickSort(), ),yH=6
new MergeSort(), IOX:yxj
new ImprovedMergeSort(), 2HSb.&7-G
new HeapSort() #.o0mguU
}; Q]^Yi1PbS
<;aJ#qT
public static String toString(int algorithm){ !KAsvF,j
return name[algorithm-1]; 9]Lo
} `wf|uM
Ep<YCSQy$i
public static void sort(int[] data, int algorithm) { RU7!U mf
impl[algorithm-1].sort(data); QsM*wT&aa
} A=0@UqM
Qd?CTYNsv
public static interface Sort { 1c/ X
public void sort(int[] data); bK?MT]%}r
} ]r!QmWw~V
8sH50jeP
public static void swap(int[] data, int i, int j) { BO]=vH
int temp = data; v"/TmiZ
data = data[j]; ZOC#i i`:
data[j] = temp; F'rt>YvF
} T30Zk*V
} ",T`\8&@e