[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; 3T= ?!|e
} #aua6V!"
int i1=l; z8@[]6cW
int i2=mid+1; K7-z.WTUR
for(int cur=l;cur<=r;cur++){ 8)o%0#;0B
if(i1==mid+1) J85S'cwZZ
data[cur]=temp[i2++]; 0Xw$l3@N^
else if(i2>r) cSD$I^$oq
data[cur]=temp[i1++]; tgVMgu
else if(temp[i1] data[cur]=temp[i1++]; LsI8T uv
else MtD0e@
data[cur]=temp[i2++]; Mp7X+o/
} (k^o[HF
} ,6 IKkyD
+Zg@X.z
} cFZcBiw
*8I"7'xh
改进后的归并排序: )vsX (/WU
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package org.rut.util.algorithm.support; YctWSfh
SYd6D@^2j
import org.rut.util.algorithm.SortUtil; U!\~LKfA
xep8CimP'
/** W;T5[
* @author treeroot UasU/Q <
* @since 2006-2-2 W>j@E|m$
* @version 1.0 ]<*-pRN
*/ ,x=S)t
public class ImprovedMergeSort implements SortUtil.Sort { @g5qcjD'[
4Jf9N'
private static final int THRESHOLD = 10; |kGQ~:k+P
+WjX@rSq[
/* ~+)>D7
* (non-Javadoc) % aqP{mOO
* &"?S0S>r!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^)UX#D3b
*/ 6Vj=SYK
public void sort(int[] data) { @GWJq 3e
int[] temp=new int[data.length]; g.*DlD%%
mergeSort(data,temp,0,data.length-1); M5kw3Jy5
} CUN1.i<pk8
#M)+sK$H%f
private void mergeSort(int[] data, int[] temp, int l, int r) { 4:9N]1JCb
int i, j, k; mIZ6[ ?
int mid = (l + r) / 2; )~0TGy|
if (l == r) mKBO<l{S
return; b+CJRB1
if ((mid - l) >= THRESHOLD) lc$wjK[w[
mergeSort(data, temp, l, mid); "WzKJwFr
else ubv>*iO
insertSort(data, l, mid - l + 1); Y$5uoq%p3A
if ((r - mid) > THRESHOLD) w,az{\
mergeSort(data, temp, mid + 1, r); aD+4uGN
else wJZuJ(
insertSort(data, mid + 1, r - mid); O.DO,]Uh
3yrb7Rn3
for (i = l; i <= mid; i++) { iax0V
temp = data; bd\%K`JQ{
} s1]m^,
for (j = 1; j <= r - mid; j++) { G}Ko*:fWS
temp[r - j + 1] = data[j + mid]; ?C`r3
} K3iQ/j~aq
int a = temp[l]; bC/Ql
int b = temp[r]; 8'"=y}]H~
for (i = l, j = r, k = l; k <= r; k++) { tZG l^mA"g
if (a < b) { N%F4ug@i
data[k] = temp[i++]; P1R5}i
a = temp; 2){O&8A
} else { PJYUD5
data[k] = temp[j--]; wF9L<<&B
b = temp[j]; jU-aa+
} M1icj~Jr
} PIAE6,*
} k1.%ZZMM
c'>_JlG~
/** x"n++j
* @param data & 'CUc/,
* @param l O7CW#F
* @param i *M)M!jTv
*/ }K5okxio
private void insertSort(int[] data, int start, int len) { I^nDO\m <
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f92z/5%V
} TlowEh8r
} = N;5T
} R nwFxFIQ
} &f}w&k2yj
F{4v[WP)
堆排序： U\u07^h[
ez5J+
package org.rut.util.algorithm.support; B Dp")[l
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import org.rut.util.algorithm.SortUtil; CBv0fQtL
(g*j+i
/** B 6z 'Q
* @author treeroot v;`>pCal
* @since 2006-2-2 pztfm'
* @version 1.0 mITNx^p4f
*/ ;:&|DN3;
public class HeapSort implements SortUtil.Sort{ QWnGolN
2]<.m]
/* (non-Javadoc) yVp,)T9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yM`u]p1
*/ rvlvk"
public void sort(int[] data) { 9;'#,b*(
MaxHeap h=new MaxHeap(); ;?k<L\zaw
h.init(data); 8ok=&Gq4
for(int i=0;i h.remove(); Vef!5]t5
System.arraycopy(h.queue,1,data,0,data.length); 2kt0Rxg
} aL_/2/@X8
sPG500=)
private static class MaxHeap{ qvLh7]sbK:
yVgC1-8i*
void init(int[] data){ KIi:5Y
this.queue=new int[data.length+1]; "g)V&Lx#X
for(int i=0;i queue[++size]=data; t>AOF\
fixUp(size); =7JSJ98
} m^0vux
} F(#?-MCs
d!UxFY@
private int size=0; `IEA
7FJ4;HLQ
private int[] queue; c-PZG|<C[
TZ+ p6M8G
public int get() { araXE~Ac
return queue[1]; 7f}uRXBV$A
} <zL_6Y2
3LT~-SvL
public void remove() { w|6/i/X
SortUtil.swap(queue,1,size--); q" f65d4c
fixDown(1); lcm3wJ'w
} E*u*LMm
file://fixdown !6 L!%Oi
private void fixDown(int k) { 1f<R,>
int j; #G.eiqh$a
while ((j = k << 1) <= size) { aopZ-^
if (j < size %26amp;%26amp; queue[j] j++; #-\5O
if (queue[k]>queue[j]) file://不用交换 MqB@}!
break; +C8O"
SortUtil.swap(queue,j,k); ZMb+sUK
k = j; Y+UJV6
} Ps>:|j+
} 9OV@z6
private void fixUp(int k) { YR*gOTD
while (k > 1) { (jA5`4>u
int j = k >> 1; L2,2Sn*4i
if (queue[j]>queue[k]) Z3weFbCH
break; gu!!}pwV9
SortUtil.swap(queue,j,k); c)LG+K
k = j; pa1<=w
} 5E-;4o;RI(
} M2|!,2
H7GI`3o
} ZX` \so,&,
=`QYy-b X
} fj;ZGbg-O
**L&I5Hhm
SortUtil： pX{wEc6}
jwT` Z
package org.rut.util.algorithm; gDVsi
.@E5dw5
import org.rut.util.algorithm.support.BubbleSort; DPjs?M<
import org.rut.util.algorithm.support.HeapSort; fJ[ ^_,O
import org.rut.util.algorithm.support.ImprovedMergeSort; m~5 unB9
import org.rut.util.algorithm.support.ImprovedQuickSort; Cd_@<
import org.rut.util.algorithm.support.InsertSort; Ai1"UYk\\Y
import org.rut.util.algorithm.support.MergeSort; J<;io!
import org.rut.util.algorithm.support.QuickSort; &J&'J~N
import org.rut.util.algorithm.support.SelectionSort; o6px1C:
import org.rut.util.algorithm.support.ShellSort; @T~XwJ~
dazNwn
/** LNWS
* @author treeroot "t&=~eOe3
* @since 2006-2-2 -0d9,,c
* @version 1.0 eO <N/?t
*/ 'EiCTl
public class SortUtil { L@{'J
public final static int INSERT = 1; s|e.mZk/
public final static int BUBBLE = 2; ud r\\5
public final static int SELECTION = 3; Yi%lWbr
public final static int SHELL = 4; RJ'[m~yl5X
public final static int QUICK = 5; } +}nrJv
public final static int IMPROVED_QUICK = 6; hm1s~@oEm
public final static int MERGE = 7; 1H-Y3G>jN
public final static int IMPROVED_MERGE = 8; U L $!
public final static int HEAP = 9; Q38+`EhLA
VKDOM0{V
public static void sort(int[] data) { P}}G9^
sort(data, IMPROVED_QUICK); 9?H$0xZV
} SYYx>1;8`
private static String[] name={ #QoWneZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Eo6N'h>h
}; =G:Krc8w@
`/PBZnj
private static Sort[] impl=new Sort[]{ ;[}OZt
new InsertSort(), miaH,hm
new BubbleSort(), \Nt 5TG_
new SelectionSort(), K9#kdo1 2
new ShellSort(), Nn[*ox#i
new QuickSort(), |O_JUl
new ImprovedQuickSort(), ]ub"OsXC
new MergeSort(), R^.PKT2E
new ImprovedMergeSort(), &))d],tJX
new HeapSort() PaI\y!f
}; TRGpE9i
H54RA6$>
public static String toString(int algorithm){ x#EE_i/W
return name[algorithm-1]; .D 4G;=Q
} _d@YLd78P
; BN81;
public static void sort(int[] data, int algorithm) { |Gf<Ql_.4
impl[algorithm-1].sort(data); d/7R}n^
} <R7{W"QTA)
o}v<~v(
public static interface Sort { ~#sD2b`0
public void sort(int[] data); -wXeue},>
} Mp`$1Ksn
{$z54nvw$
public static void swap(int[] data, int i, int j) { 1%+-}yo<
int temp = data; A3a//e
data = data[j]; qLmzA@Cv
data[j] = temp; m !*F5x
} BYq80Vk%@
} mKZzSd)p