[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; v&FF|)$
} w#i[_
int i1=l; 97!>%d[0
int i2=mid+1; W(fr<<hL
for(int cur=l;cur<=r;cur++){ l8K5k:XCU3
if(i1==mid+1) p1c3Q$>i
data[cur]=temp[i2++]; >MJ?g-
else if(i2>r) I|$ RJkD
data[cur]=temp[i1++]; }B7K@Wu#
else if(temp[i1] data[cur]=temp[i1++]; G1 o70
else ^7]"kg DA
data[cur]=temp[i2++]; *=Z26
} QH]M
} hl&-\dc+
\RQ='/H*
} }Vu\(~
(SVWdgb
改进后的归并排序: )x#5Il H
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package org.rut.util.algorithm.support; Pag63njg?
a'\By?V]
import org.rut.util.algorithm.SortUtil; !2:3MbtR
>*twTlb{
/** #sKWd
* @author treeroot m"c :"I6
* @since 2006-2-2 E99CmG|"
* @version 1.0 2S`?hxAL
*/ ^0W(hA
public class ImprovedMergeSort implements SortUtil.Sort { /RLq>#:h**
zm9TvoC%}
private static final int THRESHOLD = 10; BcA31%
+5v}q.:+
/* PZ8U6K'
* (non-Javadoc) xr(|*
* q^rl)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *5$&`&,
*/ AgF5-tz6x
public void sort(int[] data) { o-7>eE}+
int[] temp=new int[data.length]; !\[+99F#
mergeSort(data,temp,0,data.length-1); N12:{U
} "%8A:^1
0h$GI"dR
private void mergeSort(int[] data, int[] temp, int l, int r) { i54md$Q^
int i, j, k; ^C&+ ~+
int mid = (l + r) / 2; p<WFqLe(":
if (l == r) 7=4A;Ybq
return; FDFH,J`_
if ((mid - l) >= THRESHOLD) RaSz>-3d
mergeSort(data, temp, l, mid); !/K8xD$
else :<#`_K~'
insertSort(data, l, mid - l + 1); 7dh1W@\
if ((r - mid) > THRESHOLD) ~$O1`IT
mergeSort(data, temp, mid + 1, r); 'UM!*fk7C
else SN+S6
insertSort(data, mid + 1, r - mid); Jeqxspn T
@E`?<|B}
for (i = l; i <= mid; i++) { -jg (GGJ
temp = data; /7$mxtB5%L
} j&6 jRX
for (j = 1; j <= r - mid; j++) { BX;5wKfA
temp[r - j + 1] = data[j + mid]; 2^exL h
} &A!KJ.
int a = temp[l]; Y ?]G}5
int b = temp[r]; F>|9 52
for (i = l, j = r, k = l; k <= r; k++) { {F*N=pSq
if (a < b) { ;Hm'6TR!
data[k] = temp[i++]; rqCa 2
a = temp; wCZO9sU:6=
} else { |pZo2F!.
data[k] = temp[j--]; gvli%9n
b = temp[j]; d&:H&o)T!
} >Pe:I
} P#GD?FUc
} {7Cx#Ewd
>e5zrgV
/** Q882B1H
* @param data r -f
* @param l d+z[\i
* @param i urY`^lX~
*/ FN"rZWM
private void insertSort(int[] data, int start, int len) { 'zSgCgCHX8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <D/al9
} j~ym<-[{a
} g"t^r3
} V*B0lI7`B
} snk$^
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堆排序： GCE!$W
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package org.rut.util.algorithm.support; `]2@_wa
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import org.rut.util.algorithm.SortUtil; y[HQBv
*)VAaGUX>
/** 7{BnXN[
* @author treeroot hd^x}iK"
* @since 2006-2-2 G_oX5:J*
* @version 1.0 $fArk36O#
*/ |uha 38~
public class HeapSort implements SortUtil.Sort{ `ypL]$cW
Md(JIlh3
/* (non-Javadoc) q&M:17+:Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K_-MkY?+
*/ =mrY/:V
public void sort(int[] data) { qMgfMhQ7DU
MaxHeap h=new MaxHeap(); hN4VlNKu
h.init(data); '_Wt}{h
for(int i=0;i h.remove(); #MTj)P,
System.arraycopy(h.queue,1,data,0,data.length); , p0KLU\-
} EnscDtf(
IlHY%8F{
private static class MaxHeap{ t!l%/$-
>iy^$bqF
void init(int[] data){ 4]6Qr
this.queue=new int[data.length+1]; 2,AaP*,
for(int i=0;i queue[++size]=data; g37q/nEv
fixUp(size); N~g%wf@w
} CX+9R3pa
} /_OOPt=G
QFzFL-H~N
private int size=0; ,+-?Zv 2
xURw,
private int[] queue; B T7Id
%8Yyj{^!(
public int get() { rA#s
return queue[1]; ]18Ucf
} uu3M{*}
[2H[5<tH
public void remove() { nO_!:6o".
SortUtil.swap(queue,1,size--); 6F ;Or
fixDown(1); ;C_ >
} K`gc 4:A
file://fixdown Ars,V3ep
private void fixDown(int k) { )OUU]MUH
int j; =, TSMV
while ((j = k << 1) <= size) { \1{_lynD
if (j < size %26amp;%26amp; queue[j] j++; 6H6Law!)
if (queue[k]>queue[j]) file://不用交换 BvI 0v:
break; sS'{QIRC'
SortUtil.swap(queue,j,k); fM9xy \.
k = j; lbofF==(
} Bt6xV<jD
} [)iN)$Mv
private void fixUp(int k) { t[q3{-
while (k > 1) { 9@etg4#]
int j = k >> 1; AgCs;k&IG
if (queue[j]>queue[k]) cE2Rr
break; fr]Hc+7
SortUtil.swap(queue,j,k); wKLN:aRF2
k = j; 43F^J%G
} 7H?!RYrx
} iW-t}}Z>B
DzE E:&*=
} th90O|;
:^.u-bHI
} c*jr5 Y
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SortUtil： 3m~U(yho
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package org.rut.util.algorithm; .:SfMr;G
]ci RiMkT(
import org.rut.util.algorithm.support.BubbleSort; @NBXyC8,Z
import org.rut.util.algorithm.support.HeapSort; #e*$2+`[A
import org.rut.util.algorithm.support.ImprovedMergeSort; zM)M_L
import org.rut.util.algorithm.support.ImprovedQuickSort; ![j(o!6&
import org.rut.util.algorithm.support.InsertSort; " _mmR M
import org.rut.util.algorithm.support.MergeSort; @}Pw0vC
import org.rut.util.algorithm.support.QuickSort; P0Aas)!
import org.rut.util.algorithm.support.SelectionSort; R,XD6'Q
import org.rut.util.algorithm.support.ShellSort; br10ptEx
FmR\`yY_,
/** 3k`NNA
* @author treeroot Mru~<:9
* @since 2006-2-2 S[ i$e
* @version 1.0 ;Xz(B4N~o
*/ ;,R[]B01u
public class SortUtil { p~ mN2x]
public final static int INSERT = 1; Z#%}K Z
public final static int BUBBLE = 2; La@\q[U{@
public final static int SELECTION = 3; g+VRT,r
public final static int SHELL = 4; /Lj%A
public final static int QUICK = 5; x!Y(Y=i>
public final static int IMPROVED_QUICK = 6; hLCsQYNDU
public final static int MERGE = 7; {P,>Q4N
public final static int IMPROVED_MERGE = 8; 1mAUEQ!
public final static int HEAP = 9; T %$2k>
Z+OAs0}mV
public static void sort(int[] data) { T<!\B]
sort(data, IMPROVED_QUICK); 3{6ps : w
} o$*bm6o
private static String[] name={ f;&` 9s| 1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [9'|7fdU
}; ccIDMJ=2
6hR^qdHg
private static Sort[] impl=new Sort[]{ '3IkPy1Uz
new InsertSort(), Cln^1N0
new BubbleSort(), <aD'$(N5
new SelectionSort(), jt0H5-x
new ShellSort(), pW`ntE#L
new QuickSort(), xzuPie\
new ImprovedQuickSort(), gF$1wV]e
new MergeSort(), Ka[Sm|-q
new ImprovedMergeSort(), 0-6:AHix
new HeapSort() "v*oga%
}; gNG0k$nP
nD^{Q[E6=
public static String toString(int algorithm){ kq-mr
return name[algorithm-1]; g|_HcaW
} z0EjIYI[N
#p']-No
public static void sort(int[] data, int algorithm) { L{4),65
impl[algorithm-1].sort(data); f$~ _FX
} {ILp[&sL
\HBVNBY
public static interface Sort { "it`X B.
public void sort(int[] data); UwvGr h
} *##QXyyg
*C[4 (DmB
public static void swap(int[] data, int i, int j) { ez{P-qB
int temp = data; Lg\8NtP
data = data[j]; #RCZA4>
data[j] = temp; gPF}aaB6
} Nv}U/$$S
} )*q7pO\cty