[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; l7s=b4}c
} p~8~EQFj
int i1=l; G)# ,39P
int i2=mid+1; J+IW
for(int cur=l;cur<=r;cur++){ uTl:u
if(i1==mid+1) m6;Xo}^w
data[cur]=temp[i2++]; MT6kJDyLu
else if(i2>r) # Jdip)
data[cur]=temp[i1++]; G4x.''r&Sl
else if(temp[i1] data[cur]=temp[i1++]; {t=Nnc15K
else 7Ck;LF}>0
data[cur]=temp[i2++]; #Ejly2C,
} e-e{-pB6
} *<Ddn&_
Q|ik\
} Y43#];
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改进后的归并排序: mr('zpkRq
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package org.rut.util.algorithm.support; !r LHPg
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import org.rut.util.algorithm.SortUtil; Q?"[zX1
19N:9;Ixz
/** cEqh|Q
* @author treeroot 6~!YEuA
* @since 2006-2-2 ! 4oIx`
* @version 1.0 KPR{5
*/ |wLQ)y*
public class ImprovedMergeSort implements SortUtil.Sort { zHdp'J"
&U=f,9H
private static final int THRESHOLD = 10; _yoG<qI
pc.0;gN
/* [e}]K:
* (non-Javadoc) ks r5P~
* ,Tz ,)rY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :_aY:`
*/ h7y*2:l6
public void sort(int[] data) { b?Jm)
int[] temp=new int[data.length]; 0sUc6_>e
mergeSort(data,temp,0,data.length-1); sN g"JQ
} u]2k%TUY
!6%G%ZG@3-
private void mergeSort(int[] data, int[] temp, int l, int r) { +>3c+h,%.
int i, j, k; ]OrFW4tiE
int mid = (l + r) / 2; 2"MI8EK
if (l == r) v8@dvT<
return; M[{Cy[ta
if ((mid - l) >= THRESHOLD) qN QsU
mergeSort(data, temp, l, mid); Tk!b`9
else =B:poh[u
insertSort(data, l, mid - l + 1); yJL"uleRT
if ((r - mid) > THRESHOLD) h0eo:Ahi
mergeSort(data, temp, mid + 1, r); sXa8(xc
else oTfbx+i/G
insertSort(data, mid + 1, r - mid); L[bGO|O
S|J8:-
for (i = l; i <= mid; i++) { bGJUu#
temp = data; D1n2Z:9
} /trc&V
for (j = 1; j <= r - mid; j++) { &wuV}S7
temp[r - j + 1] = data[j + mid]; uUe\[-~
} II8nz[s
int a = temp[l]; Hj\~sR$L-
int b = temp[r]; kYs|")isj
for (i = l, j = r, k = l; k <= r; k++) { } 8P}L@q
if (a < b) { J:u|8>;
data[k] = temp[i++]; <e^/hR4O
a = temp; K;qZc\q
} else { `Z/IW
data[k] = temp[j--]; (*RybKoaA
b = temp[j]; :#/bA&
} /wTf&_"mTL
} c6HU'%v
} !{Y#<tG]
3+-(;>>\
/** 8w&rj-
* @param data \uk#pL
* @param l Tv$7aVi!
* @param i xu=B
*/ #CPPdU$
private void insertSort(int[] data, int start, int len) { !I[n|r"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0 MIMs#
} B@]7eVo
} L:M9|/
} &-fx=gq=
} qN[7zsaj
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堆排序： ~vGtNMQg
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package org.rut.util.algorithm.support; L"iyjL<M
-;\+uV
import org.rut.util.algorithm.SortUtil; ;g:bn5G
4Aew )
/** i)L:VkN
* @author treeroot U 0RfovJ
* @since 2006-2-2 Pp_3 nyQ
* @version 1.0 }+4Bf+u:
*/ &fW=5'
public class HeapSort implements SortUtil.Sort{ 9.zQ<k2
Zd U{`>v
/* (non-Javadoc) k|3(dXLG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) " ^baiN@ac
*/ ?=!XhU .
public void sort(int[] data) { em[F|
MaxHeap h=new MaxHeap(); 1[BvHOI2
h.init(data); =Rx?6%
for(int i=0;i h.remove(); ,/6:bc:W
System.arraycopy(h.queue,1,data,0,data.length); %Z[/U
} S<3!oDBs
Ig3(|{R
private static class MaxHeap{ RzRvu]]8
'ZH<g8:=@
void init(int[] data){ G>,nZ/,A{
this.queue=new int[data.length+1]; Z'NbHwW}
for(int i=0;i queue[++size]=data; As~p1%nok
fixUp(size); 7~ese+\smG
} -;)SER3Wq4
} A>t!/_"
~}IvY?!;
private int size=0; L-C/Luws
%DRy&k/T
private int[] queue; Ui|a}`c
?4>y2!OC9
public int get() { QHzX 5$IM
return queue[1]; =x0"6gTz>
} j]B$(pt
BgWz<k}5M
public void remove() { FPMSaN P
SortUtil.swap(queue,1,size--); :.S41S
fixDown(1); R;E"Qdt
} i9\\evJs
file://fixdown tM$0 >E
private void fixDown(int k) { Dd# SUQ
int j; 5Vqmv<F;$Z
while ((j = k << 1) <= size) { # 5f|1O
if (j < size %26amp;%26amp; queue[j] j++; Ef`5fgp? S
if (queue[k]>queue[j]) file://不用交换 rF'^w56
break; -hVv
SortUtil.swap(queue,j,k); y/}VtD
k = j; /s8%02S
} '!fFI1s
} ^wO_b'@v
private void fixUp(int k) { 7c29Ua~[
while (k > 1) { N^Hn9n
int j = k >> 1; siRnH(^J
if (queue[j]>queue[k]) 38U5^`
break; CFBUQMl>
SortUtil.swap(queue,j,k); urrO1
k = j; xV,4U/T
} g^z5fFLg/8
} !k:zLjtp
W.J:.|kt
} :^H9W^2
-; us12SZ
} %;<k(5bhGJ
0r0\b*r
SortUtil： (RDa,&
#}/cM2m
package org.rut.util.algorithm; 8Fd1;G6
C`NBHRa>
import org.rut.util.algorithm.support.BubbleSort; ;/?Z<[B
import org.rut.util.algorithm.support.HeapSort; >J^7}J
import org.rut.util.algorithm.support.ImprovedMergeSort; bl" (<TM
import org.rut.util.algorithm.support.ImprovedQuickSort; L9{mYA]q
import org.rut.util.algorithm.support.InsertSort; IW1GhZ41'
import org.rut.util.algorithm.support.MergeSort; #.E\,N'
import org.rut.util.algorithm.support.QuickSort; BaWQ<T8p8
import org.rut.util.algorithm.support.SelectionSort; 1N!Oslum
import org.rut.util.algorithm.support.ShellSort; lBlSNDs
:(bdI]
/** MiSja#"+A
* @author treeroot m4Phn~>Gg
* @since 2006-2-2 uQ[vgNe*m
* @version 1.0 Vqa5RVnI
*/ nd$H 3sf
public class SortUtil { ( oQ'4,F
public final static int INSERT = 1; 935-{h@k
public final static int BUBBLE = 2; hFsA_x+L;
public final static int SELECTION = 3; d98))G~W
public final static int SHELL = 4; vF9*tK'
public final static int QUICK = 5; <Jwi~I=^
public final static int IMPROVED_QUICK = 6; o,?!"*EP
public final static int MERGE = 7; 94~"U5oQ:
public final static int IMPROVED_MERGE = 8; /^++As0pY
public final static int HEAP = 9; x r-;,W
bK?1MiXb
public static void sort(int[] data) { u:_sTfKm&
sort(data, IMPROVED_QUICK); ~A8qeaP
} |7svA<<[
private static String[] name={ SX1X<9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [3t0M5x w
}; Pv< QjY
d>lt
private static Sort[] impl=new Sort[]{ Wyy^gJl
new InsertSort(), ,9=gVW{
new BubbleSort(), Sp 7u_Pq{
new SelectionSort(), n11LxGwk
new ShellSort(), pTcbq
new QuickSort(), dv"as4~%
new ImprovedQuickSort(), ;$vLq&(}
new MergeSort(), x1t{SQ-C
new ImprovedMergeSort(), 9wAA. -"
new HeapSort() YSqv86
}; ;c1relR2
ki\B!<uv
public static String toString(int algorithm){ fx<FIj7
return name[algorithm-1]; JDkCUN5
} bsB},pc
<v]z6B@9!
public static void sort(int[] data, int algorithm) { >eQbipn
impl[algorithm-1].sort(data); }-d)ms!
} Y^QKp"
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public static interface Sort { 8s<^]sFP
public void sort(int[] data); 3FFaEl
} {1jpLdCbV^
ar Q)%W
public static void swap(int[] data, int i, int j) { B1E$v(P3M
int temp = data; @!e~G'j%VD
data = data[j]; x5oOF7#5
data[j] = temp; `3J':Vh
} (/&;jV2DD[
} @|BD|{k