[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; -k'<6op
} G@8)3 @
int i1=l; H[=\_X1o(
int i2=mid+1; (80m'.X
for(int cur=l;cur<=r;cur++){ s0SzO,Vi
if(i1==mid+1) /"{d2
data[cur]=temp[i2++]; rAenxZ,tF
else if(i2>r) mWp>E`l
data[cur]=temp[i1++]; zggnDkC5
else if(temp[i1] data[cur]=temp[i1++]; J@3,
else P'W} ]mCD
data[cur]=temp[i2++]; Ln+l'&_nb
} wI.aV>
} S=UuEmU5N
cAWn*%
} uFkl^2
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改进后的归并排序: Rlq7.2cP
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package org.rut.util.algorithm.support; F? #3
'a~@q~!
import org.rut.util.algorithm.SortUtil; ~ ld.I4
\nl(tU#j
/** SI7rTJ]/
* @author treeroot @^,q/%;
* @since 2006-2-2 >ahDc!Jyu
* @version 1.0 `^M]|7
*/ IskL$Y ^
public class ImprovedMergeSort implements SortUtil.Sort { \]X.f&u
;4F6 $T'I
private static final int THRESHOLD = 10; R/hf"E1
zoq;3a5cqB
/* E]V, @
* (non-Javadoc) (,|,j(=]
* Bkcwl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z*.AuEK?
*/ aKI"<%PNn
public void sort(int[] data) { Kd\0nf6
int[] temp=new int[data.length]; 1/DtF
mergeSort(data,temp,0,data.length-1); j\y;~ V
} wi2`5G6|z
DX_mrG
private void mergeSort(int[] data, int[] temp, int l, int r) { e(c\U}&
int i, j, k; _4S^'FDo
int mid = (l + r) / 2; !<[+u
if (l == r) Xoj"rR9|
return; h]4xS?6O
if ((mid - l) >= THRESHOLD) X~{6$J|]#i
mergeSort(data, temp, l, mid); ",#.?vT`
else sx,$W3zI'G
insertSort(data, l, mid - l + 1); "HOZ2_(o
if ((r - mid) > THRESHOLD) Sn=6[RQ>P
mergeSort(data, temp, mid + 1, r); 3smkY
else T4eJ:u*;
insertSort(data, mid + 1, r - mid); I68u%fCv
c{q+h V=
for (i = l; i <= mid; i++) { }Fe~XO`
temp = data; BQu |qrq
} o[C^z7WG0
for (j = 1; j <= r - mid; j++) { r%,?uim#
temp[r - j + 1] = data[j + mid]; {R1]tGOf
} rOJ>lPs
int a = temp[l]; Y=S0|!u
int b = temp[r]; ]H1mj#EWU
for (i = l, j = r, k = l; k <= r; k++) { #xIg(nG
if (a < b) { >AJ/!{jD*
data[k] = temp[i++]; QkrQM&Im
a = temp; 3",gjXmBu
} else { >* -IIo
data[k] = temp[j--]; ni;_Un~
b = temp[j]; K~(RV4oF8B
} DUOoTlp
} ~k*]Z8Z
} [ 8Ohg
/!6'K
/** 66=[6U9 *
* @param data %4~"$kE
* @param l Jqoo&T")
* @param i 4^7 v@3
*/ o}N@Q-i gq
private void insertSort(int[] data, int start, int len) { LU3pCM{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h&"9v~
} LjZlKB5C
} EP>u%]#
} t{k:H4
} yF)o_OA[uR
j\}.GM'8
堆排序： Y\ [|k-6
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package org.rut.util.algorithm.support; $|$@?H>K
J8'"vc}=
import org.rut.util.algorithm.SortUtil; z"@^'{.l
4.9qB
/** d4y#n=HnnV
* @author treeroot EC?5GNGT,
* @since 2006-2-2 mWviWHK
* @version 1.0 VG5+u,U6>
*/ ;,{_=n>
public class HeapSort implements SortUtil.Sort{ o/AG9|()4
~j!n`#.\
/* (non-Javadoc) i"Jy>'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P\"kr?jZP
*/ T?3Q<[SmI
public void sort(int[] data) { J=A)]YE
MaxHeap h=new MaxHeap(); cy%M$O|hX5
h.init(data); _}[ Du/c
for(int i=0;i h.remove(); }?[];FB
System.arraycopy(h.queue,1,data,0,data.length); gM96RY
} ]E9iaq6Z
|MNSIb&,W
private static class MaxHeap{ rto?*^N?
aCZ0-X?c
void init(int[] data){ P1F-Wy1
this.queue=new int[data.length+1]; Ym'h vK
for(int i=0;i queue[++size]=data; 8h] TI_
fixUp(size); f&-`+V}U
} f+e"`80$*C
} 1W|jC
d1~#@6CIz
private int size=0; .@H:P
g->*@%?<w>
private int[] queue; Nl\`xl6y]
=,XCjiBeC
public int get() { [-(^>Y
return queue[1]; -%fQr5
} 4"&-a1N
CJ<nUIy'z
public void remove() { y|LHnNQ
SortUtil.swap(queue,1,size--); /^=1]+_!
fixDown(1); :Xw|v2z%3
} \M`qaFan5^
file://fixdown +wi=IrRr
private void fixDown(int k) { zTng]Mvx
int j; n|5\Q
while ((j = k << 1) <= size) { CE"/&I
if (j < size %26amp;%26amp; queue[j] j++; .s{"NqRA
if (queue[k]>queue[j]) file://不用交换 x`6MAZ
break; LOUP
SortUtil.swap(queue,j,k); BlJiHz!
k = j; p4T$(]7
} b0~r/M;J
} '_v~+
private void fixUp(int k) { V%-hP~nyBx
while (k > 1) { V60L\?a
int j = k >> 1; Q[OwP
if (queue[j]>queue[k]) dIC\U
break; 0)&!$@HW
SortUtil.swap(queue,j,k); x%dny]O1;
k = j; #Y5k/NPg
} GvVkb=="
} Y"FV#<9@7E
/pMOinuO
} 66val"^W
[Uup5+MCv
} )+ <w>pc
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SortUtil： \%7*@&
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package org.rut.util.algorithm; '!m6^*m|c
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import org.rut.util.algorithm.support.BubbleSort; 1T|f<ChIF<
import org.rut.util.algorithm.support.HeapSort; eB0exPz%
import org.rut.util.algorithm.support.ImprovedMergeSort; <8WFaP3,
import org.rut.util.algorithm.support.ImprovedQuickSort; vr;`h/
import org.rut.util.algorithm.support.InsertSort; )n&hO_c/
import org.rut.util.algorithm.support.MergeSort; 56AC%_ g>
import org.rut.util.algorithm.support.QuickSort; JM7mQ'`Ud
import org.rut.util.algorithm.support.SelectionSort; ?L<B]!9HZt
import org.rut.util.algorithm.support.ShellSort; ~& -h5=3
5RPG3ppS
/** sVyV|!K
* @author treeroot fRS;6Jc
* @since 2006-2-2 OnTe_JML
* @version 1.0 g Wtc3
*/ Dg&6@c|
public class SortUtil { vF^d40gV
public final static int INSERT = 1; /A{ Zf'DI
public final static int BUBBLE = 2; ]N'3jf`W
public final static int SELECTION = 3; UhH#>2r_
public final static int SHELL = 4; HA'~1$#z
public final static int QUICK = 5; jOGdq;|
public final static int IMPROVED_QUICK = 6; --$* q"
public final static int MERGE = 7; %bnXZA2Sx
public final static int IMPROVED_MERGE = 8; svpQ.Q
public final static int HEAP = 9; H<d~AurX)J
7d;|?R-8D
public static void sort(int[] data) { aHN"I
sort(data, IMPROVED_QUICK); 8c5YX
} ]}3s/NJi
private static String[] name={ fo ~uI(rk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &g|[/~dIr
}; Gxw1P@<F:
=RB {.%
private static Sort[] impl=new Sort[]{ n&[CTOV
new InsertSort(), NO!Qo:
new BubbleSort(), 5cPyi/
new SelectionSort(), xF8r+{_J)
new ShellSort(), d{YvdN9d
new QuickSort(), <r}wQ\F#
new ImprovedQuickSort(), >9H^r\
new MergeSort(), ^_]ZZin
new ImprovedMergeSort(), +d3|Up8=
new HeapSort() NzgG77>
}; A3eCI
J?o
public static String toString(int algorithm){ qb? <u
return name[algorithm-1]; <- \|>r Q
} zsp%Cz7T
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public static void sort(int[] data, int algorithm) { `nF SJlr&
impl[algorithm-1].sort(data); '|[!I!WB`
} v~mVf.j1
O},}-%G
public static interface Sort { >V6t L;+
public void sort(int[] data); _[HZ[9c!
} yCxYFi
D0Q9A]bD;
public static void swap(int[] data, int i, int j) { JLu$1A@ '
int temp = data; rqjq}L)
data = data[j]; g<Z :`00|
data[j] = temp; R/=rNUe
} 5m1J&TZ0
} OHndZ$'fI