[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; kb:C>Y8!sC
} bn`zI~WS
int i1=l; c[y8"M5
int i2=mid+1; 1v4kN -
for(int cur=l;cur<=r;cur++){ bGJUu#
if(i1==mid+1) 5QSmim
data[cur]=temp[i2++]; @j (jOe
else if(i2>r) :kVV.a#g
data[cur]=temp[i1++]; nGbrWu]w
else if(temp[i1] data[cur]=temp[i1++]; )QE_+H}p
else (J4utw Z
data[cur]=temp[i2++]; YXtGuO\q
} d<Os TA
} !LJ.L?9qw
:=Q|gRTL*
} +)@>60y
9y5\4&v
改进后的归并排序: p~.@8r(
<e^/hR4O
package org.rut.util.algorithm.support; DPwSg\*)
KR}0(,Y
import org.rut.util.algorithm.SortUtil; 'O`3FI
$Y`aS^IW
/** U.aa iX7
* @author treeroot o.5j@dr
* @since 2006-2-2 Tpukz_F
* @version 1.0 /wTf&_"mTL
*/ Wj:QC<5 v
public class ImprovedMergeSort implements SortUtil.Sort { a 98
(<l2 ^H
private static final int THRESHOLD = 10; v'!Ntk
?lK!OyCkc
/* h9I)<_}R
* (non-Javadoc) X*"Kg
* 3CE8+PnT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g5Dx9d{
*/ -T?IkL)
public void sort(int[] data) { PNKT\yd
int[] temp=new int[data.length]; Oi0;.<kX
mergeSort(data,temp,0,data.length-1); JY2 F-0t)
} j''Iai_
VTWE-:r
private void mergeSort(int[] data, int[] temp, int l, int r) { `0i3"06lr
int i, j, k; h)rf6*hw
int mid = (l + r) / 2; i6d$/yP"
if (l == r) 9+QrTO
return; hU 7fZl%yl
if ((mid - l) >= THRESHOLD) ]M(mq`K
mergeSort(data, temp, l, mid); sZ"U=6R
else *d@Hnu"q
insertSort(data, l, mid - l + 1); /[? F1Q
if ((r - mid) > THRESHOLD) ~vGtNMQg
mergeSort(data, temp, mid + 1, r); `z_7[$\~
else &HK s >
insertSort(data, mid + 1, r - mid); !C#RW=h9
C._sgO
for (i = l; i <= mid; i++) { eeU$uR
temp = data; @MB _gt)7?
} _vdxxhJ=P3
for (j = 1; j <= r - mid; j++) { ik*)j
temp[r - j + 1] = data[j + mid]; 0Qp'}_
} ,)$KS*f"*z
int a = temp[l]; 38rZ`O*D
int b = temp[r]; 5|CiwQg|,p
for (i = l, j = r, k = l; k <= r; k++) { 3\n{,Q
if (a < b) { 1fFb7n~3
data[k] = temp[i++]; b0b9#9x
a = temp; yCIgxPv|7
} else { L~{Vt~H9"
data[k] = temp[j--]; Qe$>Jv5
b = temp[j]; k|3(dXLG
} o#P3lz
} B bw1k
} SECQVA_y`
5TneuG[OD
/** 1[BvHOI2
* @param data g>xUS_d>
* @param l '$XHRS/q]
* @param i R.H\b!
*/ *+j{9LK
private void insertSort(int[] data, int start, int len) { 2A}uqaF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =>0M3 Qh{
} SMO%sZ]
} 2 dD<]
} 0?us]lx
} r?nV Sb|[
'UVv(-
堆排序： @CU|3Qg
4spaw?j
package org.rut.util.algorithm.support; nRB>[lG
4l}M i
import org.rut.util.algorithm.SortUtil; BZ+ mO
As~p1%nok
/** Ws*PMK.0
* @author treeroot Rca Os
* @since 2006-2-2 \678Nx
* @version 1.0 e( o/we{
*/ R96o8#7Uv
public class HeapSort implements SortUtil.Sort{ IR dz(~CP
z8(R.TB
/* (non-Javadoc) y)/$ge_U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) };m7FO
*/ NhoS7 y(
public void sort(int[] data) { fuD1U}c
MaxHeap h=new MaxHeap(); .Spi$>v
h.init(data); QHzX 5$IM
for(int i=0;i h.remove(); xbrmPGpW$
System.arraycopy(h.queue,1,data,0,data.length); {vT55i<mk
} abaQJ|
DV[ Jbl:)
private static class MaxHeap{ @`;Y/',
Pkx(M E
void init(int[] data){ {,f!'i&b@
this.queue=new int[data.length+1]; :.S41S
for(int i=0;i queue[++size]=data; \+Rwm:lI
fixUp(size); qi SEnRG.
} Gr#rM/AfCK
} ZC5Yve8
^s@*ISY
private int size=0; :uwRuPI
mrhp)yF
private int[] queue; @oz&
22/?JWL>
public int get() { 9j?hF$L"
return queue[1]; bj7MzlGFy
} ]EM)_:tRf
+:"6`um|
public void remove() { {1@4}R4
SortUtil.swap(queue,1,size--); 32 1={\X
fixDown(1); 2Ph7qEBQ22
} a4jnu:e
file://fixdown '!fFI1s
private void fixDown(int k) { LA+$_U"Jk
int j; 6PJJ?}P^1
while ((j = k << 1) <= size) { "_1-IE
if (j < size %26amp;%26amp; queue[j] j++; )qyx|D
if (queue[k]>queue[j]) file://不用交换 $uUb$8Bu
break; moVa'1ul
SortUtil.swap(queue,j,k); g;-+7ViIr
k = j; G{f`K^
} XJJ[F|k~
} I^M#[xA
private void fixUp(int k) { }r~v,KDb
while (k > 1) { ll(e,9.D
int j = k >> 1; #U$YZ#B
if (queue[j]>queue[k]) X&9^&U=e
break; b>bgUDq
SortUtil.swap(queue,j,k); uq|vNLW26
k = j; Lov.E3S6;
} %89"A'g
} P )t]bS
$&=4.7Yt
} z^P* :
UU.mdSL
} *CH!<VB/
Lz9$,Y[
SortUtil： o0aO0Y
*X=@yB*aK
package org.rut.util.algorithm; L,L~ .E
)4!CR/ao
import org.rut.util.algorithm.support.BubbleSort; 0H OoKh
import org.rut.util.algorithm.support.HeapSort; Ko$ $dkSE
import org.rut.util.algorithm.support.ImprovedMergeSort; *h*j%
import org.rut.util.algorithm.support.ImprovedQuickSort; C,|nmlDN
import org.rut.util.algorithm.support.InsertSort; &h7smZO5j
import org.rut.util.algorithm.support.MergeSort; _@#uIOcE
import org.rut.util.algorithm.support.QuickSort; _OJ0 < {E
import org.rut.util.algorithm.support.SelectionSort; '<?v:pb9
import org.rut.util.algorithm.support.ShellSort; ]^*_F
QH7V_#6bKP
/** bl" (<TM
* @author treeroot 9<t9a f\.>
* @since 2006-2-2 J|gdO+
* @version 1.0 Ei{(
*/ a%Z4_ToLZ
public class SortUtil { VQy9Y
public final static int INSERT = 1; M.xhVgFf)
public final static int BUBBLE = 2; Hi; K"H]x1
public final static int SELECTION = 3; OX)#F'Sl}
public final static int SHELL = 4; lBlSNDs
public final static int QUICK = 5; xta}4:d-Y
public final static int IMPROVED_QUICK = 6; ~t{D5#LVHa
public final static int MERGE = 7; 9{)Z5%Kz
public final static int IMPROVED_MERGE = 8; c$,c`H(~
public final static int HEAP = 9; 6\,DnO
6[+\CS7Lt
public static void sort(int[] data) { <CZI7]PM7
sort(data, IMPROVED_QUICK); :LZ-da"QR
} f$1Gu
private static String[] name={ CN\|_y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K/f>f;c
}; FF%\gJ
OwG6i|q
private static Sort[] impl=new Sort[]{ v%H"_T
new InsertSort(), Jh37pI
new BubbleSort(), vF9*tK'
new SelectionSort(), n9]IBIthe
new ShellSort(), <O \tC81
new QuickSort(), 6Gs{nFw
new ImprovedQuickSort(), =7 Jy
new MergeSort(), pT("2:)x
new ImprovedMergeSort(), V*6l6-y~Ih
new HeapSort() l;XU#6{
}; .abyYVrN4?
/hm84La
public static String toString(int algorithm){ u:_sTfKm&
return name[algorithm-1]; 'ox0o:
} [kPD`be2#
QuSV&>T\
public static void sort(int[] data, int algorithm) { &_"ORqn&
impl[algorithm-1].sort(data); SX1X<9
} o2;(VSKhS
|RR"'o_E
public static interface Sort { ~hS3*\^~M
public void sort(int[] data); SQh+5
} :d;[DYFLxb
69t7=r
public static void swap(int[] data, int i, int j) { F;IP3tD
int temp = data; mSU@UD|'
data = data[j]; >%9^%p^
data[j] = temp; J?._/RL8-
} qq OxTG]
} fA"<MslKLK