[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; M;\K+,
} *Z)`:Gae
int i1=l; _F,@mQ$!
int i2=mid+1; 7F)HAbIS
for(int cur=l;cur<=r;cur++){ !Aj_r^[X`
if(i1==mid+1) 42Kzdo|}
data[cur]=temp[i2++]; BO/2kL8*
else if(i2>r) R4@C>\c%m
data[cur]=temp[i1++]; IF5+&O
else if(temp[i1] data[cur]=temp[i1++]; 9R'rFI
else \iu2rat^
data[cur]=temp[i2++]; ~l{CUQU
} :t\PYDp1
} J]fjg%C2m
?%oPWmj}
} W?XvVPB
QVzLf+R~
改进后的归并排序: 7Py8!
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package org.rut.util.algorithm.support; crZ\:LeJ
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import org.rut.util.algorithm.SortUtil; mgH4)!Z*56
ZVK;m1?'
/** Er~5\9,/<]
* @author treeroot ;v8,r#4
* @since 2006-2-2 BuK82
* @version 1.0 J~n{gT<L
*/ 'T+3tGCy+
public class ImprovedMergeSort implements SortUtil.Sort { P(A%z2Ql
O3Ks|%1
private static final int THRESHOLD = 10; (MJu3t @
z@T;N'EM
/* ")x9A&p
* (non-Javadoc) L7a+ #mGE
* H'Z[3e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oyj!N`&z@
*/ 2\EMtR>.M'
public void sort(int[] data) { 8h;1(S)*Z
int[] temp=new int[data.length]; S`"IM?
mergeSort(data,temp,0,data.length-1); X} 8rrC=
} >MiA|N=
-I\_v*nA
private void mergeSort(int[] data, int[] temp, int l, int r) { mIl^
int i, j, k; bLaD1rnGi
int mid = (l + r) / 2; l3l[jDa,2
if (l == r) [dOPOA/d
return; {[)J~kC+
if ((mid - l) >= THRESHOLD) V`@@ufU}
mergeSort(data, temp, l, mid); j_p.KF'[?
else d~GT w:
insertSort(data, l, mid - l + 1); nCXIWLw
if ((r - mid) > THRESHOLD) o?/N4$&5l
mergeSort(data, temp, mid + 1, r); |l7e*$j
else [4t_ 83
insertSort(data, mid + 1, r - mid); -pa.-@
=We}&80x
for (i = l; i <= mid; i++) { n#Z6d`
temp = data; U/|B IF
} LDwu?"P!
for (j = 1; j <= r - mid; j++) { I?l*GO+pz
temp[r - j + 1] = data[j + mid]; F!^ Y!Y@H
} jG{xFz>x
int a = temp[l]; pwU]r
int b = temp[r]; Y @pkfH
for (i = l, j = r, k = l; k <= r; k++) { 7m@pdq5Ub
if (a < b) { "+Xwc+v^
data[k] = temp[i++]; YR~g&E#U^
a = temp; %Cb8vYz~
} else { :jB(!XH
data[k] = temp[j--]; s+Ln>c'|o
b = temp[j]; B>AIec\jG
} `^F'af
} f,`FbT
} 3cQTl5,
CaZEU(i
/** C+-~Gmrb(7
* @param data H-7*)D
* @param l 1sn!!
* @param i v_)cp9d]
*/ 6mMJ$FY+
private void insertSort(int[] data, int start, int len) { &e3z)h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oaRPYgh4
} \!z=x#!O$
} :vX;>SH$p
} 8=)Aksu
} P#rwYPww\
SZvw>=)a
堆排序： )p12SGR5
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package org.rut.util.algorithm.support; B]Yj"LM)
>:Q:+R;3o
import org.rut.util.algorithm.SortUtil; s( 2=E|
<fs2;
/** klJDYFX=HK
* @author treeroot ] p'+F
* @since 2006-2-2 M}/%t1^g:
* @version 1.0 cGOE$nL
*/ 3)42EM'9(
public class HeapSort implements SortUtil.Sort{ -^\k+4;
zXUE<\
/* (non-Javadoc) {TE0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {&w%3
*/ }wj*^>*
public void sort(int[] data) { )k29mqa`
MaxHeap h=new MaxHeap(); kD MS7y<s
h.init(data); ( 9dV%#G\
for(int i=0;i h.remove(); v`x~O+
System.arraycopy(h.queue,1,data,0,data.length); ^/Gjk
} nGX~G^mZ
_Y\@{T;^Zb
private static class MaxHeap{ vk;>#yoox
!Me%W3
void init(int[] data){ vaR0`F
this.queue=new int[data.length+1]; ,ulNap"R
for(int i=0;i queue[++size]=data; eQ9{J9)?
fixUp(size); br$!}7#=L
} ^Fb"Is#S,
} cr,o<
E3NYUHfZ
private int size=0; (IJf2
f&^Ea-c
private int[] queue; Y k~ i.p
_2f}WY3S
public int get() { X] Tb4
return queue[1]; _mXq]r0
} =CRaMjN
B;W=61d
public void remove() { !dVcnK1
SortUtil.swap(queue,1,size--); R>pa? tQgK
fixDown(1); \EB]J\x<
} h`3;^T
file://fixdown !v`q%JW(
private void fixDown(int k) { s.GTY@t
int j; w8FZXL
while ((j = k << 1) <= size) { TSHp.ABf
if (j < size %26amp;%26amp; queue[j] j++; ] ^
if (queue[k]>queue[j]) file://不用交换 D8[&}D4
break; |nU:
SortUtil.swap(queue,j,k); GXJ3E"_.
k = j; `Rj i=k>
} Qyd3e O_
} L[TL~@T
private void fixUp(int k) { f()^^+
while (k > 1) { vbwEX6
int j = k >> 1; hw~cS7
if (queue[j]>queue[k]) BIV]4vl-&
break; r=&PUT+vt
SortUtil.swap(queue,j,k); s8eiq`6\H}
k = j; r<C^hs&]
} F)DL/';
} H@aCo(#
&\!-d%||)
} B*DH^";t
r OB\u|Pg
} nV']^3b
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SortUtil： /_jApZz
T("Fh}
package org.rut.util.algorithm; NG5H?hVN=
5bZ`YO
import org.rut.util.algorithm.support.BubbleSort; >(%im:_
import org.rut.util.algorithm.support.HeapSort; 9iS3.LCfX
import org.rut.util.algorithm.support.ImprovedMergeSort; pLyX9C
import org.rut.util.algorithm.support.ImprovedQuickSort; pR\etXeLd
import org.rut.util.algorithm.support.InsertSort; \I'A:~b)L
import org.rut.util.algorithm.support.MergeSort; _Q.3X[88C
import org.rut.util.algorithm.support.QuickSort; kAy.o
import org.rut.util.algorithm.support.SelectionSort; 8 LaZ5
import org.rut.util.algorithm.support.ShellSort; O8dDoP\F2
I X\&lV
/** ?>lmLz!e
* @author treeroot f<kL}B+,Og
* @since 2006-2-2 <;U"D.'
* @version 1.0 cpE&Fba}"
*/ wQ[2yq
public class SortUtil { uLL#(bhDr
public final static int INSERT = 1; Tb{,WUJg2
public final static int BUBBLE = 2; UbQeN
public final static int SELECTION = 3; 7Jc=`Zm'
public final static int SHELL = 4; zWjGGTP~3&
public final static int QUICK = 5; 3_Oq4/
public final static int IMPROVED_QUICK = 6; n]8_]0{qi
public final static int MERGE = 7; +;;fw |/
public final static int IMPROVED_MERGE = 8; EidIi"sr
public final static int HEAP = 9; DlIfr6F
L~ 1Lv?
public static void sort(int[] data) { @uH7GW}$g
sort(data, IMPROVED_QUICK); Y`(I};MO
} dHOz;4_
private static String[] name={ Ii[rM/sG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tbOe,-U-@
}; 9=JU&/!
\vm'D'9
private static Sort[] impl=new Sort[]{ xsAF<:S\
new InsertSort(), F1%' zsv
new BubbleSort(), !uHI5k,f
new SelectionSort(), #UXmTrZ.
new ShellSort(), CT"0"~~
new QuickSort(), %Yd}},X_E
new ImprovedQuickSort(), % )|/s%W
new MergeSort(), [;I.aT}R!;
new ImprovedMergeSort(), Bpk%,*$*)
new HeapSort() 8q tNK>D
}; "Ny_RF
a`|/*{
public static String toString(int algorithm){ OpH9sBnA
return name[algorithm-1]; W%1fm/G0
} d,D)>Y'h
Wg}#{[4
public static void sort(int[] data, int algorithm) { eMh:T@SN
impl[algorithm-1].sort(data); cwpDad[Kx
} BY\p?79
|AWu0h\keO
public static interface Sort { }3?M0:
public void sort(int[] data); 9sT?"(=
} Wa[~)A
SXod r}
public static void swap(int[] data, int i, int j) { +9h6{&yr1
int temp = data; i [j`'.fj
data = data[j]; b#XS.e/uf
data[j] = temp; pr;L~$JW
} YHKm{A ]
} z*9/"M