[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; qw6EPC
} qw9e) `3$
int i1=l; 9)ACgz&(
int i2=mid+1; aIQrb
for(int cur=l;cur<=r;cur++){ !&'# a
if(i1==mid+1) k,a,h^{}j
data[cur]=temp[i2++]; #"=%b e3
else if(i2>r) =|^X$H
data[cur]=temp[i1++]; 'Na|#tPYI
else if(temp[i1] data[cur]=temp[i1++]; (qNco8QKu3
else Up_>y>x
data[cur]=temp[i2++]; Ngn\nkf
} I/u'bDq
} #Y/97_2 xa
I[tAT[ <
} >&*6Fqd
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改进后的归并排序: LBW.*PHW
c ,Qw;
package org.rut.util.algorithm.support; tVC@6Z$
}K#iCby4
import org.rut.util.algorithm.SortUtil; Vww@eK%5Q
;+S2h-4
/** Z}]:x `fXd
* @author treeroot pA*D/P-
* @since 2006-2-2 (k7;
* @version 1.0 EG'7}W
*/ i)A`Vpn
public class ImprovedMergeSort implements SortUtil.Sort { P}ehNt*($
R1]v}f_I"
private static final int THRESHOLD = 10; 3N(8|wh
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/* !O 0ZD4/{4
* (non-Javadoc) 34"{rMbQ
* `=_7I?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0L3Bo3:k
*/ gubb .EY
public void sort(int[] data) { U'JP1\
int[] temp=new int[data.length]; Y9z:xE
mergeSort(data,temp,0,data.length-1); s98: *o3
} ,\.YJD>z
Hj}g1"RA
private void mergeSort(int[] data, int[] temp, int l, int r) { nEjo,
int i, j, k; jEC'l]l
int mid = (l + r) / 2; {Hktu|
if (l == r) !Ei Ze.K
return; -~QlHp&SY
if ((mid - l) >= THRESHOLD) P^'>dOI0w
mergeSort(data, temp, l, mid); |HKHN?)
else 8cYuzt]..
insertSort(data, l, mid - l + 1); @c.11nfn`
if ((r - mid) > THRESHOLD) $bF`PGR_
mergeSort(data, temp, mid + 1, r); YHwVj?6W
else 5#9`ROT9
insertSort(data, mid + 1, r - mid); o+)m}'T8
VZ9e~){xA
for (i = l; i <= mid; i++) { (E2lv#[
temp = data; }w|=c>'_}
} m? \#vw$
for (j = 1; j <= r - mid; j++) { G#_(7X&
temp[r - j + 1] = data[j + mid]; :epitpJ
} e8WPV
int a = temp[l]; +lY\r +;
int b = temp[r]; :Su5
for (i = l, j = r, k = l; k <= r; k++) { hr/xpQW
if (a < b) { mI_ 6f~
data[k] = temp[i++]; ;ph+ZV
a = temp; DYy@t^sC
} else { LaAgoarN
data[k] = temp[j--]; ,d/CU
b = temp[j]; 8EW`*+%=
} B=o#LL
} MSxU>FX0
} bi4^ zaCEE
ijR-?nrR
/** ss|6_H =
* @param data VC_3ll]vr
* @param l ;&7qw69k
* @param i jS5t?0
*/ ,=XS%g}l4
private void insertSort(int[] data, int start, int len) { ( SC7m/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X:zyzEhS
} y$;zTH_6j
} 3V8j>&
} ]8q%bsl+
} {4V:[*3
&L[8Mju6
堆排序： qZyt>SAx
y7}~T!UyfF
package org.rut.util.algorithm.support; 2_ZHJ,r
f6/\JVi)-
import org.rut.util.algorithm.SortUtil; s525`Q;
;1(qGy4
/** D%5 {A=
* @author treeroot YA/H;707l
* @since 2006-2-2 W+-f `
* @version 1.0 mtHi9).,y|
*/ 0zq\ j
public class HeapSort implements SortUtil.Sort{ =:0IHyB#0
ej??j<]
/* (non-Javadoc) ;Kq<',u~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n=#[Mi $Y
*/ <iY 9cV|}3
public void sort(int[] data) { @/ovdf{
MaxHeap h=new MaxHeap(); [3bwbfHhi
h.init(data); ~k:>Xo[|O
for(int i=0;i h.remove(); =-a?oH-
System.arraycopy(h.queue,1,data,0,data.length); y+~Aw"J}
} .,iw2:
l*V72!Mv
private static class MaxHeap{ aV92.Z_Ku
'E4(!H,k
void init(int[] data){ \[hrG?A
this.queue=new int[data.length+1]; #f jX|b
for(int i=0;i queue[++size]=data; 3`C3+
fixUp(size); ~jrU#<'G9
} y|2g"J
} iR4,$Nn>
R.n`R|NOd
private int size=0; 5Dh&ez`oR'
$(<*pU
private int[] queue; Q=9VuTE
EzY scX.[
public int get() { fh5^Gd~
return queue[1]; s*A|9uf5
} jak|LOp
h^3Vd K,
public void remove() { E'6z7m.
SortUtil.swap(queue,1,size--); &<;nl^
fixDown(1); h hNFp
} >+W?!9[p:2
file://fixdown q=i,'.nS
private void fixDown(int k) { h11bK'TIv
int j; f<xt3
while ((j = k << 1) <= size) { @o-evH;G
if (j < size %26amp;%26amp; queue[j] j++; !un"XI0`t<
if (queue[k]>queue[j]) file://不用交换 rt4|GVa
break; ^c:eXoU
SortUtil.swap(queue,j,k); ~m"M#1,ln3
k = j; ,19"[:WN
} Q!$kUcky9
} q?b)zeJ
private void fixUp(int k) { QH56tQq
while (k > 1) { BtDgv.;GH
int j = k >> 1; HoQ(1e$G-
if (queue[j]>queue[k]) 8B(Q7Qj
break; m$e@<~To
SortUtil.swap(queue,j,k); [E&"9%K
k = j; TuT=
} @zpHemdB
} m0K2p~
uc `rt"
} ieK'<%dxF
]&%X(jWyn
} pz z`4VS:
SZ1pf#w!
SortUtil： _[6+FdS],
FV<^q|K/(]
package org.rut.util.algorithm; l[OQo|_
)I1V2k$n
import org.rut.util.algorithm.support.BubbleSort; m+JGe5fR<
import org.rut.util.algorithm.support.HeapSort; :y)&kJpleP
import org.rut.util.algorithm.support.ImprovedMergeSort; tLGwF3e$A
import org.rut.util.algorithm.support.ImprovedQuickSort; v,O&UrZ
import org.rut.util.algorithm.support.InsertSort; 4iB)oR
import org.rut.util.algorithm.support.MergeSort; 3_['[}
import org.rut.util.algorithm.support.QuickSort; a>e 1jM[
import org.rut.util.algorithm.support.SelectionSort; @;-Un/'C;7
import org.rut.util.algorithm.support.ShellSort; ny;)+v?mN\
W!Os ci
/** oI"Fpo
* @author treeroot SX<>6vH&
* @since 2006-2-2 N,'qMoNf
* @version 1.0 (]uoN4
*/ ;{#M
public class SortUtil { /t2<OU9
public final static int INSERT = 1; AI`1N%Owi
public final static int BUBBLE = 2; J*kzJ{vwy*
public final static int SELECTION = 3; SOY#, Zu
public final static int SHELL = 4; oZ>]8vw
public final static int QUICK = 5; Kh_>Vm/
public final static int IMPROVED_QUICK = 6; vt7C
public final static int MERGE = 7; :=fHPT
public final static int IMPROVED_MERGE = 8; 2tTV5,(1
public final static int HEAP = 9; ZtZV:re=
a[OLS+zf!P
public static void sort(int[] data) { A&|(%
sort(data, IMPROVED_QUICK); m_W.r+s~C4
} uTFEI.N
private static String[] name={ vVRCM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K>E!W!-PJ
}; J};,%q_
;R>42 qYF
private static Sort[] impl=new Sort[]{ |zegnq~
new InsertSort(), i}12mjF
new BubbleSort(), rs)aEmvC
new SelectionSort(), xH.q
new ShellSort(), krT!AfeV
new QuickSort(), dtXJ<1:
new ImprovedQuickSort(), dEl3?~
new MergeSort(), "h|0]y^2
new ImprovedMergeSort(), E.*OA y
new HeapSort() GeR-k9
}; 9!<3qx/
3).c[F^l
public static String toString(int algorithm){ IOsDVIXL\
return name[algorithm-1]; m,"tdVo.
} G@6,O-Sj
Wam?(!{mOf
public static void sort(int[] data, int algorithm) { i]Of<eQ"
impl[algorithm-1].sort(data); (4gQe6tA
} <Gt{(is
|L#r)$n{1
public static interface Sort { 6aK2{-+
public void sort(int[] data); J;9QDrl`
} QRix_2+
[_B&7#3>7
public static void swap(int[] data, int i, int j) { ]fmfX
int temp = data; Nv#, s_hG
data = data[j]; o*S $j Cf?
data[j] = temp; X Ow^"=Oa[
} MPw7!G(qj
} L{ ^@O0S