[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; q =b.!AZy
} !aeL*`;
int i1=l; ;wbQTp2
int i2=mid+1; I.fV_ H^
for(int cur=l;cur<=r;cur++){ ibl^A=
if(i1==mid+1) }H?8~S=
data[cur]=temp[i2++]; O4@Ki4f3A%
else if(i2>r) { Y|h;@j$
data[cur]=temp[i1++]; oB-&ma[ZS
else if(temp[i1] data[cur]=temp[i1++]; %;!@\5$
else xp7,0'(;
data[cur]=temp[i2++]; [zm&}$nnN
} o$\{&:y
} ?|%^'(U}
Fla[YWS
} />Wh
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改进后的归并排序: -3qB,KT
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package org.rut.util.algorithm.support; PkLRQ}
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import org.rut.util.algorithm.SortUtil; i`gsT[JQRX
eE>3=1d]w
/** X@b$C~+
* @author treeroot \_!FOUPz(
* @since 2006-2-2 E(4ti]'4
* @version 1.0 S&6}9r
*/ .hg<\-:_
public class ImprovedMergeSort implements SortUtil.Sort { H #J"'
[])M2_
private static final int THRESHOLD = 10; }yLdU|'W
;QR|v
/* 022YuqL<v
* (non-Javadoc) gu/eC
* GuV-[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N(dn"`8
*/ blid* @-
public void sort(int[] data) { $&qB,>5=X
int[] temp=new int[data.length]; 1i_~ZzX8
mergeSort(data,temp,0,data.length-1); N$/{f2iC
} x]euNa
)"WImf:*
private void mergeSort(int[] data, int[] temp, int l, int r) { ba%[!
int i, j, k; L:`|lc=^
int mid = (l + r) / 2; enF.}fo]
if (l == r) Z"lL=0rY/
return; hEl)BRJ
if ((mid - l) >= THRESHOLD) ?fXg_?+{'g
mergeSort(data, temp, l, mid); .!U `,)I
else XU2HWa
insertSort(data, l, mid - l + 1); =P'=P0G
if ((r - mid) > THRESHOLD) !}"npUgE
mergeSort(data, temp, mid + 1, r); ]b'K BAMy
else iEr|?,
insertSort(data, mid + 1, r - mid); 7_S+/2}U*
$P^=QN5Bb
for (i = l; i <= mid; i++) { Xr:"8FT
temp = data; N ]}Re$5
} X-3L4@T:?
for (j = 1; j <= r - mid; j++) { R=i$*6}a
temp[r - j + 1] = data[j + mid]; (*/P~$xIj
} s$C;31k
int a = temp[l]; 9$~D4T
int b = temp[r]; Aw4Qm2Kf
for (i = l, j = r, k = l; k <= r; k++) { m/0G=%d%k
if (a < b) { g"2@E
data[k] = temp[i++]; 5WO!u:!'
a = temp; :B$=Pp1
} else { [_|iW%<`
data[k] = temp[j--]; -gu)d5b
b = temp[j]; <9"s&G@
} `vDg~o
} \tyL`&)
} Wfu%,=@,
,<R/x[
/** IqfR`iAix
* @param data cOOPNa>5_
* @param l ?b#/*T}ac
* @param i _L_SNjA_
*/ oMLpl3pl
private void insertSort(int[] data, int start, int len) { PX?tD:,[-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); csRba;Z[
} PaMi5Pq
} YxS*im[%]
} S^I38gJd
} 0w< iz;30
tOnaD]J
堆排序： :lgIu .
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package org.rut.util.algorithm.support; I4m)5G?O2
2}[rc%tV:?
import org.rut.util.algorithm.SortUtil; $]|_xG-6{
q1r\60M
/** tK g%5;v
* @author treeroot xW/JItF
* @since 2006-2-2 Bpo~x2p
* @version 1.0 XwX1i!'54
*/ "y "C#:5
public class HeapSort implements SortUtil.Sort{ hYi-F.Qtq
m;KMr6sO
/* (non-Javadoc) aFyNm@a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *:BNLM
*/ 49/1#^T"Q>
public void sort(int[] data) { 3`^]#Dh
MaxHeap h=new MaxHeap(); QdO$,i'
h.init(data); Z'S>i*Ts
for(int i=0;i h.remove(); XiKv2vwA
System.arraycopy(h.queue,1,data,0,data.length); {EW}Wd
} }mu8fm'
RvDqo d
private static class MaxHeap{ "9LPq
`dEWP;#cp
void init(int[] data){ [<wy@W
this.queue=new int[data.length+1]; /PPk p9H{
for(int i=0;i queue[++size]=data; BAX])~_
fixUp(size); bTO$B2eh|
} d`({z]W;
} fkRb;aIl
<u4GIi <sm
private int size=0; &bBp`h
h=`rZC
private int[] queue; -d_FB?X
j|lg&kN
public int get() { eC[g"Ef
return queue[1]; o|^0DYb
} 168U-<
F b`V.
public void remove() { oJ6 d:
SortUtil.swap(queue,1,size--); J)'6 z
fixDown(1); :JW~$4
} O~'1)k>
file://fixdown Bfi9%:eG
private void fixDown(int k) { s15f <sp
int j; 8Yb/ c*
while ((j = k << 1) <= size) { +Tq _n@
if (j < size %26amp;%26amp; queue[j] j++; xU@Z<d,k
if (queue[k]>queue[j]) file://不用交换 #Sn&Wo
break; ;pAkdX&b
SortUtil.swap(queue,j,k); ^$?8!WE
k = j; lD/+LyTa
} | @di<d@
} J3$`bK6F6
private void fixUp(int k) { HK2`.'D
while (k > 1) { .rxc"fR4_
int j = k >> 1; IgN,]y
if (queue[j]>queue[k]) em>CSBx
break; Yd/qcC(&
SortUtil.swap(queue,j,k); fF-V=Zf5
k = j; :^l*_v{
} 2$T~(tem
} RL)'m
)}?dYk
} !my5-f>{(
laFkOQI
} ?#FAa,
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SortUtil： s-8>AW ep
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package org.rut.util.algorithm; jj.]R+.G
ceZt%3=5
import org.rut.util.algorithm.support.BubbleSort; 3`, m=1[)
import org.rut.util.algorithm.support.HeapSort; 'JkK0a2D
import org.rut.util.algorithm.support.ImprovedMergeSort; .`hlw'20
import org.rut.util.algorithm.support.ImprovedQuickSort; c-M&cU+=L
import org.rut.util.algorithm.support.InsertSort; i"_f46rP
import org.rut.util.algorithm.support.MergeSort; b~#rUOXb8?
import org.rut.util.algorithm.support.QuickSort; hR=4w$
import org.rut.util.algorithm.support.SelectionSort; 4SG[_:+!
import org.rut.util.algorithm.support.ShellSort; 72v 9S T
n`^</0
/** (TnYUyFP`
* @author treeroot v- {kPc=:#
* @since 2006-2-2 `P# h?tZ
* @version 1.0 ]0`[L<_r
*/ t%FS 5
public class SortUtil { '}!dRpx
public final static int INSERT = 1; vW]BOzK
public final static int BUBBLE = 2; ipU"|{NK
public final static int SELECTION = 3; }bB_[+YV`{
public final static int SHELL = 4; f(##P|3>R
public final static int QUICK = 5; &VQwuO
public final static int IMPROVED_QUICK = 6; 6fkL@It
public final static int MERGE = 7; `8'|g8,wb0
public final static int IMPROVED_MERGE = 8; r*tGT_/6
public final static int HEAP = 9; 2t(E+^~
> }:6m
public static void sort(int[] data) { }F1^gN&QF
sort(data, IMPROVED_QUICK); zA+^4/M
} ?cpID8Z
private static String[] name={ '4O1Y0K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3}N:oJI$z
}; Kt`0vwkjvI
E~N}m7kTl/
private static Sort[] impl=new Sort[]{ =)y=M!T2
new InsertSort(), T.K$a\/{,
new BubbleSort(), ,u\M7,a^
new SelectionSort(), @Z|cUHo
new ShellSort(), A Ys<IMQ
new QuickSort(), h|jsi*4NnL
new ImprovedQuickSort(), ){wE)NN
new MergeSort(), /8GVu7
new ImprovedMergeSort(), >O?EFd>E
new HeapSort() gZvl D
}; S B'.
2QBq
public static String toString(int algorithm){ X1" `0r3
return name[algorithm-1]; x$A5Ved
} 8E$KR:/:4
A4SM@ry
public static void sort(int[] data, int algorithm) { y#T":jpR
impl[algorithm-1].sort(data); !5{t1 oJ
} z{tyB
.c BJA&/
public static interface Sort { pX2 Ki^)]
public void sort(int[] data); -bE{yT)7
} &JP-M=\n
LiN{^g^fx
public static void swap(int[] data, int i, int j) { ]huqZI
int temp = data; *.Kc-f4mP
data = data[j]; :uMD$zF'5
data[j] = temp; Va !HcG1^:
} FTk!Mn88
} B04Br~hel*