[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; A'.=SA2.Y
} H~^)^6)^T
int i1=l; '/)qI.
int i2=mid+1; e^'|<0J
for(int cur=l;cur<=r;cur++){ i\O^s ]
if(i1==mid+1) Ch\__t*v!
data[cur]=temp[i2++]; ":f]egq -
else if(i2>r) uXk]
data[cur]=temp[i1++]; fY6~Z BvK
else if(temp[i1] data[cur]=temp[i1++]; jwUX?`6jX
else I _gE`N
data[cur]=temp[i2++]; Y2;2Exp^
} T];dFv-GT
} )XHn.>]nc
U E$Ix
} XMiu}w!
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改进后的归并排序: 0)M8Tm0$
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package org.rut.util.algorithm.support; v`{N0R
x|O^#X(,
import org.rut.util.algorithm.SortUtil; uovv">Uw
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/** %~y>9K
* @author treeroot Sg4{IU
* @since 2006-2-2 +VNk#Z i
* @version 1.0 =~k c7f{
*/ 9?8PMh.
public class ImprovedMergeSort implements SortUtil.Sort { b+|3nc!
2:_6nWl
private static final int THRESHOLD = 10; dt^h9I2O
fvcS=nRQv
/* ?^M,Mt
* (non-Javadoc) *yaS^k\
* 0y6M;"&~E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &!OEd]
*/ *ziR&Fr!
public void sort(int[] data) { yIrJaS-
int[] temp=new int[data.length]; eZaSV>27
mergeSort(data,temp,0,data.length-1); I/%v`[
} ?C#E_
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private void mergeSort(int[] data, int[] temp, int l, int r) { b>Y{,`E3
int i, j, k; R(`:~@3\6
int mid = (l + r) / 2; !?(7g2NP)
if (l == r) tAF?.\x"g
return; 7@ )
if ((mid - l) >= THRESHOLD) OQ7 `n<I<)
mergeSort(data, temp, l, mid); ! 5NuFLOf
else NC#F:M;b
insertSort(data, l, mid - l + 1); s2#Ia>5!
if ((r - mid) > THRESHOLD) i'7+ ?YL
mergeSort(data, temp, mid + 1, r); u '7h(1@
else IHYLM;@L
insertSort(data, mid + 1, r - mid); dH!z<~
Jjm#ofv
for (i = l; i <= mid; i++) { bh<;px-
temp = data; Vv45w#w;
} !t^DN\\#
for (j = 1; j <= r - mid; j++) { #<S*MGp!=
temp[r - j + 1] = data[j + mid]; qh:Bc$S
} 2lCFE)
int a = temp[l]; 3f] ;y<Km
int b = temp[r]; vWZXb`
for (i = l, j = r, k = l; k <= r; k++) { u0c}[BAF
if (a < b) { iN[x *A|h
data[k] = temp[i++]; =9X1+x
a = temp; 68Gywk3]=u
} else { BtZ]~S}v
data[k] = temp[j--]; pYx,*kG:HW
b = temp[j]; D]]wJQU2
} &cSVOsi
} Ic9L@2m
} ,-4NSli
F5Z,Jmi^M
/** pA~}_
* @param data >%k6k1CZ
* @param l k~^4
* @param i MQQm3VaKS
*/ R7kkth
private void insertSort(int[] data, int start, int len) { `oJQA$UD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m{/( 3
} %bAQ>E2;m
} N-\N\uN
} :<t=??4m
} MLu!8dgI
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堆排序： >ESVHPj]
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package org.rut.util.algorithm.support; k*\Bl4g
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import org.rut.util.algorithm.SortUtil; 5e/YEDP
x,!Dd
/** .9rYBy
* @author treeroot sD:o 2(G*
* @since 2006-2-2 UX@%1W!8
* @version 1.0 Lwr's'ao.
*/ ^_;'9YD
public class HeapSort implements SortUtil.Sort{ wqb4w7%
z3jkxWAZ
/* (non-Javadoc) 6^wI^`NI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u4C9ZYN
*/ U!aM63F3
public void sort(int[] data) { V4n~Z+k
MaxHeap h=new MaxHeap(); GtVT^u_
h.init(data); H#~gx_^U
for(int i=0;i h.remove(); P>VoA
System.arraycopy(h.queue,1,data,0,data.length); )*~A|[
} zuV%`n
"bm|p/A
private static class MaxHeap{ m2c'r3UEu
BDB*>y7(
void init(int[] data){ ;=Ma+d#
this.queue=new int[data.length+1]; >fH0>W+!
for(int i=0;i queue[++size]=data; Vr1}Zv3K'
fixUp(size); 6ZqU:^3
} ~U0%}Bbh
} Qt>K{ >9Cf
l88=
private int size=0; K(EJ`2]:r
h2ROQKL"B
private int[] queue; b=,BLe\
C/e.BXA
public int get() { gV2vwe
return queue[1]; 2:*15RH3
} m,k0 h%
r5}p .
public void remove() { um.ZAS_kmc
SortUtil.swap(queue,1,size--); D&G6^ME
fixDown(1); 'D+xs}\
} rH3U;K!
file://fixdown P`biHs8O
private void fixDown(int k) { *;fTiL
int j; IT| h;NUG
while ((j = k << 1) <= size) { L4>14D\
if (j < size %26amp;%26amp; queue[j] j++; q)?%END
if (queue[k]>queue[j]) file://不用交换 ?UtKu
break; 9/k2zXY
SortUtil.swap(queue,j,k); >)kKP8l7
k = j; V<QpC5
} b^/u9
} )|~&(+Q?]
private void fixUp(int k) { ;6G]~}>o
while (k > 1) { .xT?%xSi/
int j = k >> 1; hX.cdt_?
if (queue[j]>queue[k]) /5NWV#-
break; =Z\q``RBy
SortUtil.swap(queue,j,k); Dvg'
k = j; Kxsd@^E
} MntmBj-T
} [V'c
q"VmuQ
} + -<8^y
Y25`vE(
} Hn/t'D3
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SortUtil： T|~5dZL
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package org.rut.util.algorithm; 3H#,qug$
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import org.rut.util.algorithm.support.BubbleSort; YWIA(p8Qkk
import org.rut.util.algorithm.support.HeapSort; iJ{axa &
import org.rut.util.algorithm.support.ImprovedMergeSort; ]Jswxw
import org.rut.util.algorithm.support.ImprovedQuickSort; (HAdr5
import org.rut.util.algorithm.support.InsertSort; ~VsN\!G
import org.rut.util.algorithm.support.MergeSort; w7MRuAJ4
import org.rut.util.algorithm.support.QuickSort; x1@,k=qrd
import org.rut.util.algorithm.support.SelectionSort; >WZ.Dj0n
import org.rut.util.algorithm.support.ShellSort; F'uqL+jVO
:` SIuu~@
/** RuHDAJ"&a
* @author treeroot zA#pgX[#
* @since 2006-2-2 b 8@}Jv
* @version 1.0 i+`8$uz
*/ ,a5q62)q
public class SortUtil { 4Wl`hF
public final static int INSERT = 1; ozOc6
public final static int BUBBLE = 2; so`\e^d
public final static int SELECTION = 3; Xe4
public final static int SHELL = 4; 3o rSk
public final static int QUICK = 5; Hcf"u&%
public final static int IMPROVED_QUICK = 6; ^tTM 7
public final static int MERGE = 7; }9ulHiR
public final static int IMPROVED_MERGE = 8; ) 8xbc&M
public final static int HEAP = 9; c]*yo
R~=c1bpdq
public static void sort(int[] data) { z(A60b}
sort(data, IMPROVED_QUICK); fHaF9o+/b
} (Nzh1ul\}
private static String[] name={ Ic3a\FTr\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^iH[ 22b4
}; K"l~bFCZ8
4zs0+d+
private static Sort[] impl=new Sort[]{ 3ML^ dZ'
new InsertSort(), u&*[
new BubbleSort(), ~=yU%5 s@
new SelectionSort(), }oD^tU IK
new ShellSort(), x1~AY/)v
new QuickSort(), IR"C?
new ImprovedQuickSort(), 7^>~k}H
new MergeSort(), H ezbCwsx&
new ImprovedMergeSort(), BD"Dzq
new HeapSort() +`flIG3RV
}; remc_}`w
i6bUJtL
public static String toString(int algorithm){ e\}@w1
return name[algorithm-1]; Csu9u'.V
} U/Cc!WXV]
dsX"S;`v
public static void sort(int[] data, int algorithm) { Lum=5zDo
impl[algorithm-1].sort(data); 1!zd#TX
} )7NK+k
VK/L}^=GOO
public static interface Sort { =o~mZ/ 7=M
public void sort(int[] data); c6jVx_tt.
} `"~GqFwy~
|ghyH
public static void swap(int[] data, int i, int j) { KEy8EB
int temp = data; 5Y;&L!T
data = data[j]; /\e_B6pF<
data[j] = temp; [#!Y7Ede
} /sYr?b!/<6
} 8}BM`@MG