[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; \fIGMoy!
} AVf'"~?
int i1=l; 'g.9 goQ
int i2=mid+1; YyEW}2
for(int cur=l;cur<=r;cur++){ pQAG%i^mF
if(i1==mid+1) _jg&}HM
data[cur]=temp[i2++]; :so2 {.t-
else if(i2>r) Jn3cU
data[cur]=temp[i1++]; ;[TC`DuNj0
else if(temp[i1] data[cur]=temp[i1++]; "<uaG?:
else iq2)oC_
data[cur]=temp[i2++]; @TF^6)4f
} Uyf<:8U\
} L[o;@+32
m}&cXY
} vaN}M)W/
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改进后的归并排序: 3fPd|F.kF
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package org.rut.util.algorithm.support; Xmr|k:z
uvR9BL2=
import org.rut.util.algorithm.SortUtil; JLo'=(
s+IU%y/9$a
/** vFKX@wV S
* @author treeroot gv)F`uRWA
* @since 2006-2-2 4Gz5Ju
* @version 1.0 7R9.g6j
*/ vU,AOK[l{
public class ImprovedMergeSort implements SortUtil.Sort { kHLpa/A
z{XN1'/V
private static final int THRESHOLD = 10; \1|]?ZQ\K
aK>5r^7S
/* RO.GD$ 3n
* (non-Javadoc) @!k\Ivd
* r*?rwtFtg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5@l[!Jl0k
*/ ,Vb;2
public void sort(int[] data) { GZJIIP#
int[] temp=new int[data.length]; Sc!]M 5
mergeSort(data,temp,0,data.length-1); !Rp
} W=b<"z]RE
X 'D~#r
private void mergeSort(int[] data, int[] temp, int l, int r) { "9F]Wv/
int i, j, k; &q~**^;'
int mid = (l + r) / 2; 6G2s^P1Dl@
if (l == r) Ip c2Qsa
return; /tIR}qK
if ((mid - l) >= THRESHOLD) nADt8
mergeSort(data, temp, l, mid); 0zH^yx:ma
else !;Hi9,<#7g
insertSort(data, l, mid - l + 1); 5A|4
if ((r - mid) > THRESHOLD) vwy10PlqL
mergeSort(data, temp, mid + 1, r); UrAg*v!Qy
else .gY}}Q
insertSort(data, mid + 1, r - mid); 6x18g(KbP
P$l-p'U-
for (i = l; i <= mid; i++) { yLv jfP1
temp = data; o=/Cje
} Twqkd8[
for (j = 1; j <= r - mid; j++) { 9J>b6
temp[r - j + 1] = data[j + mid]; (EZ34,k'S
} &qR1fbw"
int a = temp[l]; tF:'Y ~3 p
int b = temp[r]; J6m`XC
for (i = l, j = r, k = l; k <= r; k++) { -anLp8G*
if (a < b) { BPf;!.
data[k] = temp[i++]; Y)D~@|D,
a = temp; `v2]Jk<
} else { 4a'O#;ho
data[k] = temp[j--]; P "S=RX#+
b = temp[j]; WY=RJe2
} _PTo!aJL
} 31BN ?q
} Y# <38+Gd
HbQvu@
/** "v.]s;g
* @param data P<+y%g(({
* @param l m3|KIUP
* @param i %y@iA91K
*/ @\~qXz{6J
private void insertSort(int[] data, int start, int len) { !AR$JUnX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6Mpbmfr
} C):RE<X
} B_f0-nKP
} m>po+7"b
} 9ICC2%j|
#3uBq(-Z
堆排序： >z=_V|^$
o;#{N~4[$
package org.rut.util.algorithm.support; W@S'mxk#*
= mnjIp
import org.rut.util.algorithm.SortUtil; m~K[+P
HSt|Ua.c/h
/** kBPFk t2
* @author treeroot R=D\VIu,Z
* @since 2006-2-2 'WqSHb7
* @version 1.0 %}z/_QZ
*/ %9_wDfw~
public class HeapSort implements SortUtil.Sort{ jgiP2k[Xom
v\9:G
/* (non-Javadoc) mwuFXu/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )9,*s!)9
*/ +B*8$^,V)
public void sort(int[] data) { >$.u|a
MaxHeap h=new MaxHeap(); Q@3.0Hf|{
h.init(data); wf7<#jIq
for(int i=0;i h.remove(); `[+9n2j
System.arraycopy(h.queue,1,data,0,data.length); ]Ll<
} Q]*YIb~D
C,C=W]G
private static class MaxHeap{ DdI7%?hK
DSwF }
void init(int[] data){ h]Zc&&+8{
this.queue=new int[data.length+1]; $s2-O!P?
for(int i=0;i queue[++size]=data; Z$R2Z$f
fixUp(size); {Y5h*BD>
} my#qmI
} Isq3YY
CK e
private int size=0; ]{9oB-;,
`Tzqvnn
private int[] queue; 5H6GZ:hp
l3aG#4jj
public int get() { [7Nn%eZC
return queue[1]; W7NHr5RC
} 7YRDQjg
=q|fe%#
public void remove() { uTJi }4cw
SortUtil.swap(queue,1,size--); D#%J||
fixDown(1); QN(f8t(
} &%pB; dk
file://fixdown #( nheL
private void fixDown(int k) { X$JO<@x
int j; K{VF_S:
while ((j = k << 1) <= size) { BfOG e!Si
if (j < size %26amp;%26amp; queue[j] j++; =erA.u
if (queue[k]>queue[j]) file://不用交换 Vvx(7p-GQ
break; $"{V],:T |
SortUtil.swap(queue,j,k); ADX}
k = j; XA])<dZ
} 3&*0n^g
} rL URP2~
private void fixUp(int k) { y? [*qnPj
while (k > 1) { T[))ful
int j = k >> 1; 0:G@a&Lr
if (queue[j]>queue[k]) 1at$_\{.(
break; Fm}O,=
SortUtil.swap(queue,j,k); 81a&99k#
k = j; k?Jzy
} hvBuQuk)
} -b@E@uAX/
SX}GKu
} AW'tZF"
=nnS X-x
} yh_s(>sh
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SortUtil： %9mCgHQ9
Kw'Dzz%kN
package org.rut.util.algorithm; "!)8bTW
9szE^kHS9
import org.rut.util.algorithm.support.BubbleSort; whKr3)
import org.rut.util.algorithm.support.HeapSort; if5Y!Tx?G
import org.rut.util.algorithm.support.ImprovedMergeSort; 5*buRYck0
import org.rut.util.algorithm.support.ImprovedQuickSort; oW]&]*>J
import org.rut.util.algorithm.support.InsertSort; =Ak>2
import org.rut.util.algorithm.support.MergeSort; af{;4Cr
import org.rut.util.algorithm.support.QuickSort; !W$3p'8Tu
import org.rut.util.algorithm.support.SelectionSort; K=sQ_j.&Z
import org.rut.util.algorithm.support.ShellSort; 9r1pdG_C@
E08AZOY&g
/** B4R,[WE"
* @author treeroot pq5)Ug
* @since 2006-2-2 e;3$7$n Pv
* @version 1.0 Lu:!vTRmw
*/ \)BKuIP
public class SortUtil { @=wAk5[IN
public final static int INSERT = 1; 54F([w
public final static int BUBBLE = 2; 8zj09T[
public final static int SELECTION = 3; l^`!:BOtR
public final static int SHELL = 4; d;#9xD'
public final static int QUICK = 5; 8KWTd
public final static int IMPROVED_QUICK = 6; Q X@&~
public final static int MERGE = 7; j{_MDE7N
public final static int IMPROVED_MERGE = 8; M/V >25`
public final static int HEAP = 9; +G/~v`Bv
3"[ KXzn
public static void sort(int[] data) { s*9tWSd
sort(data, IMPROVED_QUICK); LR)is
} \yG_wZs
private static String[] name={ f`Wfw3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /HzhgMV3
}; nBiSc*
0^(.(:
private static Sort[] impl=new Sort[]{ 3SIB #"9
new InsertSort(), q=?"0i&V
new BubbleSort(), 6C]!>i}U
new SelectionSort(), TaolX*$5
new ShellSort(), _ux6SIyp`
new QuickSort(), r)j#Skh].
new ImprovedQuickSort(), R:.7c(s
new MergeSort(), ^\+6*YE 4
new ImprovedMergeSort(), I:6xDDpZG`
new HeapSort() KktTR`W
}; [z$J
La9@h"
public static String toString(int algorithm){ 3al5Vu2:
return name[algorithm-1]; j|aT`UH03
} E"G._<3J8
?tA-`\E
public static void sort(int[] data, int algorithm) { G~esSL^G/
impl[algorithm-1].sort(data); J"83S*2(j
} 0_]aF8j
0)2lBfHQ&
public static interface Sort { wG{obsL.!
public void sort(int[] data); BK /;HG
} v>R.M"f
V)(pe #P
public static void swap(int[] data, int i, int j) { w@:o:yLS
int temp = data; )d.7xY7!
data = data[j]; -x_iqrB
data[j] = temp; ))KsQJ"V
} Z#J{tXZc
} 'xi..