[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; Ynv9&P
} 2!{_/@I\Y
int i1=l; 'GV&]
int i2=mid+1; >vD['XN,
for(int cur=l;cur<=r;cur++){ E6'8Zb
if(i1==mid+1) _l#3]#
data[cur]=temp[i2++]; ERp:EZ'
else if(i2>r) oF%^QT"R
data[cur]=temp[i1++]; lnC!g
else if(temp[i1] data[cur]=temp[i1++]; }yx=(+jP
else @@xO+$6
data[cur]=temp[i2++]; FasI'Ulk
} U;';"9C2>
} `"xk,fVYd
\3t,|%v
} :kWZSN8.D
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改进后的归并排序: WdTbt
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package org.rut.util.algorithm.support; U9<_6Bsd
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import org.rut.util.algorithm.SortUtil; n\Z^K
tv 4s12&
/** I6K7!+;2
* @author treeroot ,pDp>-vI%
* @since 2006-2-2 3 R5%N ~
* @version 1.0 Ff[H>Lp~
*/ u{g]gA8s
public class ImprovedMergeSort implements SortUtil.Sort { :FoOQ[Q
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private static final int THRESHOLD = 10; KH>Sc3p
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/* =:4'
* (non-Javadoc) *4|9&PNLE
* W.yV/fu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vx04h~
*/ &e%{k@
public void sort(int[] data) { t*o7,
int[] temp=new int[data.length]; r> Fec
mergeSort(data,temp,0,data.length-1); o{9?:*?7
} Z -pyFK\
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private void mergeSort(int[] data, int[] temp, int l, int r) { xh{mca>?G
int i, j, k; aN>U. SB
int mid = (l + r) / 2; $|Q".dD
if (l == r) S#P+B*v
return; ^Lsc`<xC
if ((mid - l) >= THRESHOLD) *GCA6X
mergeSort(data, temp, l, mid); |tG05+M
else D4AEZgC F,
insertSort(data, l, mid - l + 1); ~@%(RMJm&
if ((r - mid) > THRESHOLD) lN);~|IOv7
mergeSort(data, temp, mid + 1, r); jz %;4e~t
else p9/bzT34.
insertSort(data, mid + 1, r - mid); BD hLz
!$D&6M|C8l
for (i = l; i <= mid; i++) { w|&,I4["
temp = data; Xf6fH O
} 40 A&#u9o
for (j = 1; j <= r - mid; j++) { UE"7
temp[r - j + 1] = data[j + mid]; HvAE,0N
} 2y^Uk,g
int a = temp[l]; M,&tA1CH
int b = temp[r]; ; Zh9^0
for (i = l, j = r, k = l; k <= r; k++) { cE^kpnVq|<
if (a < b) { :[L{KFQU
data[k] = temp[i++]; ~@xT]D!BQ
a = temp; S2Zx &D/_
} else { U%Dit
data[k] = temp[j--]; j -#E?&2
b = temp[j]; vZ:G8K)o(
} w-J"zC
} : @s8?eg
} +:}kZDl@ X
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/** YQN.Ohtv*F
* @param data Z#CxQ D%\
* @param l /d[Mss
* @param i 7`Qde!+C
*/ >+L7k^[,0
private void insertSort(int[] data, int start, int len) { |Es0[cU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); YFG-U-t3
} bi+9R-=&
} KCE=|*6::|
} 5n:nZ_D
} !zU/Hq{wcK
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堆排序： miwf&b
: -E,
package org.rut.util.algorithm.support; wc"9A~
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import org.rut.util.algorithm.SortUtil; 5;}2[3}[
M Z2^@It
/** Ys-^7 y_
* @author treeroot '[%jjUU
* @since 2006-2-2 ?qy*s3j'M
* @version 1.0 [@ILc*2O
*/ N5yJ'i~,M
public class HeapSort implements SortUtil.Sort{ >A<Df
cbfDB^_
/* (non-Javadoc) ;;M"hI3@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;"D~W#0-v
*/ >8%M*-=p
public void sort(int[] data) { Ha?G=X
MaxHeap h=new MaxHeap(); lHcA j{6
h.init(data); <&`:&7
for(int i=0;i h.remove(); WXLK89ev\
System.arraycopy(h.queue,1,data,0,data.length); E!uJ6\
} emA.{cVr!
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private static class MaxHeap{ 36nyu_h:R
,'=hjIel
void init(int[] data){ 7q!?1 -?8R
this.queue=new int[data.length+1]; I,]J=xi
for(int i=0;i queue[++size]=data; B& "RS
fixUp(size); 04~}IbeJ
} u >4ArtF
} #vtN+E
w#sq'vo4%
private int size=0; jKS!'?
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private int[] queue; as(;]
7H4L-J3
public int get() { *<7l!#
return queue[1]; g@Ld"5$^2
} &Bm&i.r
02(h={
public void remove() { 7 I@";d8~
SortUtil.swap(queue,1,size--); qIz}$%!A
fixDown(1); *Z >
} 9j0o&Xn
file://fixdown CG.,/]_
private void fixDown(int k) { S"Kq^DN
int j; f9a$$nb3`
while ((j = k << 1) <= size) { >otJF3zw
if (j < size %26amp;%26amp; queue[j] j++; ?.Q3 pUT
if (queue[k]>queue[j]) file://不用交换 iKhH^V%j
break; *Z; r B
SortUtil.swap(queue,j,k); HAd%k$Xu{
k = j; lY8`5Uz
} g>yry}>04%
} /9Z!p
private void fixUp(int k) { V:OiW"/
while (k > 1) { Jr]gEBX
int j = k >> 1; *!w25t
if (queue[j]>queue[k]) 68p R:
break; F_v-}bbcFQ
SortUtil.swap(queue,j,k); T{tn.sT
k = j; 7*/J4MN
} 9n"V\e_R
} Kr]z]4.d@
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} I>aGp|4
+j.qZ8
} Q ?^4\_
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SortUtil： SB/3jH
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package org.rut.util.algorithm; r8,om^N6
4gb'7'
import org.rut.util.algorithm.support.BubbleSort; Y&5.9 s@'
import org.rut.util.algorithm.support.HeapSort; YQ7@D]#
import org.rut.util.algorithm.support.ImprovedMergeSort; Fm5Q&'`l
import org.rut.util.algorithm.support.ImprovedQuickSort; ?!y"OrHg
import org.rut.util.algorithm.support.InsertSort; j`9Qzi1
import org.rut.util.algorithm.support.MergeSort; U<rI!!#9
import org.rut.util.algorithm.support.QuickSort; :v)6gz(p
import org.rut.util.algorithm.support.SelectionSort; A?r^V2+j
import org.rut.util.algorithm.support.ShellSort; VX!hv`E
:BD>yOlG
/** /tZ0 |B(
* @author treeroot -?z\5z
* @since 2006-2-2 @$c!/
* @version 1.0 JD*8@N
*/ N2Ssf$
public class SortUtil { >Nh`rkR2[
public final static int INSERT = 1; = ^s$ <
public final static int BUBBLE = 2; c0ZaFJ
public final static int SELECTION = 3; N&m_e)E5c
public final static int SHELL = 4; lE'wfUb
public final static int QUICK = 5; )~dOmfw%|
public final static int IMPROVED_QUICK = 6; PS}73Y#
public final static int MERGE = 7; {OP~8e"
public final static int IMPROVED_MERGE = 8; 'yr{^Pek
public final static int HEAP = 9; ~b6GrY"vB
NO4Z"3Pd_
public static void sort(int[] data) { S/7l/DFb
sort(data, IMPROVED_QUICK); pV=@sz,G
} 0>FE%
private static String[] name={ Y{+3}drJE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *)D1!R<\,R
}; ?Oc -aa
kP^*hO!%
private static Sort[] impl=new Sort[]{ CmHyAw(
new InsertSort(), `{o$F ::(
new BubbleSort(), RG}}Oh="v
new SelectionSort(), ,H{={aln
new ShellSort(), d}+W"j;
new QuickSort(), MUwxgAG`G
new ImprovedQuickSort(), J|5Ay1eF-
new MergeSort(), dB7ZT0L\
new ImprovedMergeSort(), F 7LiG9H6`
new HeapSort() t^U^Tr
}; SiTeB)/
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public static String toString(int algorithm){ s[X B#)H4
return name[algorithm-1]; x.UaQ |F
} #xp(B5
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public static void sort(int[] data, int algorithm) { g "*;nHI D
impl[algorithm-1].sort(data); H=<LutnZ
} F#|Z# Mu
RRzP*A%=
public static interface Sort { hB>^'6h+
public void sort(int[] data); T1zi0fa'
} ="(>>C1-
MGaiTN^_<
public static void swap(int[] data, int i, int j) { +zp0" ,2B
int temp = data; :0I l|aB
data = data[j]; ;;Tq$#vd
data[j] = temp; -?fR|[\[U
} g~)3WfC$[
} NwpS)6<-