[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; NJk)z&M
} AHq M7+r9
int i1=l; Is ot4HLM
int i2=mid+1; iZC>)&ax
for(int cur=l;cur<=r;cur++){ lHcA j{6
if(i1==mid+1) C(}^fJ6r
data[cur]=temp[i2++]; JT}.F!q6E
else if(i2>r) E!uJ6\
data[cur]=temp[i1++]; emA.{cVr!
else if(temp[i1] data[cur]=temp[i1++]; I4ebkPgf
else 36nyu_h:R
data[cur]=temp[i2++]; ,'=hjIel
} {aoMJJq
} 0fA=_=A,
B& "RS
} fSbS(a
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改进后的归并排序: @`6}`k
.wP/ai>}
package org.rut.util.algorithm.support; e#1.T
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import org.rut.util.algorithm.SortUtil; 3EI]bmi~
S.1(3j*
/** 7H4L-J3
* @author treeroot P:qz2Hw
* @since 2006-2-2 nX)f'[ 7
* @version 1.0 >9{zQf!
*/ &Bm&i.r
public class ImprovedMergeSort implements SortUtil.Sort { 02(h={
BGN9,ii
private static final int THRESHOLD = 10; G?R_aPP
*Z >
/* 9j0o&Xn
* (non-Javadoc) CG.,/]_
* S"Kq^DN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i*'Z3Z)
*/ ;?zF6zvQ
public void sort(int[] data) { 07FT)QTE
int[] temp=new int[data.length]; VtWT{y5Ec
mergeSort(data,temp,0,data.length-1); _W}(!TKO
} R#ya,L
?,>5[Ha^?
private void mergeSort(int[] data, int[] temp, int l, int r) { S@Iw;V
int i, j, k; oPsK:GC`U
int mid = (l + r) / 2; @7%.7LK
if (l == r) i-]U+m*
return; `0rRKlbj4
if ((mid - l) >= THRESHOLD) (n,N8k;
mergeSort(data, temp, l, mid); $~G@
else ; h85=l<8u
insertSort(data, l, mid - l + 1); tvGlp)?.
if ((r - mid) > THRESHOLD) F5U|9<
mergeSort(data, temp, mid + 1, r); sBU_Ft
else N}DL(-SQ3
insertSort(data, mid + 1, r - mid); "W5rx8a
^&MK42,\
for (i = l; i <= mid; i++) { n+rM"Gxz
temp = data; 'BhwNuW\"
} @D]lgq[
for (j = 1; j <= r - mid; j++) { C `6S}f,
temp[r - j + 1] = data[j + mid]; 5B?i(2&#
} Im+7<3Z
int a = temp[l]; !b63ik15O~
int b = temp[r]; WL1\y|
for (i = l, j = r, k = l; k <= r; k++) { $ser+Jt=
if (a < b) { ceG&,a$\
data[k] = temp[i++]; A?r^V2+j
a = temp; *gDl~qNRoS
} else { NH4?q!'G
data[k] = temp[j--]; SO_>c+Dw
b = temp[j]; I0_Ecp
} #)]E8=}
} j8a[ (
} g YUTt
(v^Z BM_
/** "mA1H]r3
* @param data +>}o;`hPe
* @param l R$d7\nBG
* @param i P#;Th8k{K2
*/ kC`Rd:5
private void insertSort(int[] data, int start, int len) { y42#n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =) }nLS3t
} V^sc1ak1Q
} P,ydt
} i/*,N&^
} NbkK&bz
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堆排序： G "brT5:
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package org.rut.util.algorithm.support; y\,f6=%k
" #v%36U
import org.rut.util.algorithm.SortUtil; oM-[B h]A
UP8{5fx'
/** N}mh}
* @author treeroot w & P&7
* @since 2006-2-2 ]\dHU.i
* @version 1.0 t^U^Tr
*/ AY88h$a
public class HeapSort implements SortUtil.Sort{ 2y%R:Mu
BIj
/* (non-Javadoc) c\K<sM{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $>r5>6
*/ :)4*^a/lC
public void sort(int[] data) { U&W"Ea=R/
MaxHeap h=new MaxHeap(); $3\,h;y
h.init(data); YlKFw|=
for(int i=0;i h.remove(); Y.-S=Y
System.arraycopy(h.queue,1,data,0,data.length); T5e^J"
} q.T:0|
H,K`6HH
private static class MaxHeap{ ?1w"IjUS
ag;dc
void init(int[] data){ X8R1a?
this.queue=new int[data.length+1]; pkk4h2Ah
for(int i=0;i queue[++size]=data; "dtlME{Bx
fixUp(size); fRNP#pi0u
} o;J;k_[MX
} y-a|Lu*
O{q&]~,
private int size=0; vRr9%zx
V3uXan_
private int[] queue; B^q<2S;
Z@M6!;y#
public int get() { WcEt%mGQ,
return queue[1]; Nfb`YU=
} X-/Ban
bVK$.*,
public void remove() { }_%P6
SortUtil.swap(queue,1,size--); {y-`QS
fixDown(1); (p,}'I#i*
} I$j|Rq
file://fixdown J-XTN"O
private void fixDown(int k) { zy>}L #
int j; C}Qt "-%
while ((j = k << 1) <= size) { 8xTix1u0
if (j < size %26amp;%26amp; queue[j] j++; x~+-VF3/
if (queue[k]>queue[j]) file://不用交换 mi^hvks<
break; S^j,f'2
SortUtil.swap(queue,j,k); jQ$BPEG&X
k = j; KB[QZ`"%!
} |GuEGmR
} (/?R9T[V&^
private void fixUp(int k) { S#2[%o
while (k > 1) { 2w4MJ,Uw
int j = k >> 1; ri+U0[e3
if (queue[j]>queue[k]) vr4S9`,
break; Ue7 6py9
SortUtil.swap(queue,j,k); ;k}H(QI
k = j; ~L'nzquF
} f#OQ (WTJE
} ZqK]jT6V/X
%rcFT_
} jBRPR R0
1X&B:_
} vGN3 YcH
Zi4d]
SortUtil： =DMbz`t
28oJFi]
package org.rut.util.algorithm; MZ~.(&
Pfan7fq+
import org.rut.util.algorithm.support.BubbleSort; TB#Nk5
import org.rut.util.algorithm.support.HeapSort; zH=hIVc
import org.rut.util.algorithm.support.ImprovedMergeSort; Dl A Z"C
import org.rut.util.algorithm.support.ImprovedQuickSort; #ZTLrq5b
import org.rut.util.algorithm.support.InsertSort; o0`q#>7!_b
import org.rut.util.algorithm.support.MergeSort; j04/[V)
import org.rut.util.algorithm.support.QuickSort; x+:zq<0|
import org.rut.util.algorithm.support.SelectionSort; Kv?;cu!
import org.rut.util.algorithm.support.ShellSort; @a(oB.i
784;]wdy\
/** RGp'b
* @author treeroot 2 ~-( A
* @since 2006-2-2 ikHOqJ-,m
* @version 1.0 p(?3 V
*/ ps+:</;Z
public class SortUtil { )4uq iA6
public final static int INSERT = 1; SRf5W'4y
public final static int BUBBLE = 2; H\+-cvl
public final static int SELECTION = 3; * nCx[
public final static int SHELL = 4; c<tmj{$
public final static int QUICK = 5; J"&y|;G
public final static int IMPROVED_QUICK = 6; oEIqA
public final static int MERGE = 7; YiZx{5
public final static int IMPROVED_MERGE = 8; ) b:4uK A
public final static int HEAP = 9; 5f_7&NxT
@vAFfYU9<.
public static void sort(int[] data) { IG|\:Xz
sort(data, IMPROVED_QUICK); )U5u" ]9~
} v{koKQ'Y()
private static String[] name={ CZ tiWZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M/B/b<['
}; 5i9Ub|!P
w-FHhf
private static Sort[] impl=new Sort[]{ 3Gd|YRtk
new InsertSort(), (\& 62B1
new BubbleSort(), Vp7b4n<
new SelectionSort(), Fu##'#
new ShellSort(), -u~eZ?(!Ye
new QuickSort(), /qXzOd
new ImprovedQuickSort(), z2~87fv+
new MergeSort(), ZNL5({lv
new ImprovedMergeSort(), s=U\_koyH
new HeapSort() >76 |:Nq
}; <Uwwux<v
U>A6eWhH
public static String toString(int algorithm){ ImHU:iR[J-
return name[algorithm-1]; r|-J8s#
} qTy v.#{y
KPggDKS
public static void sort(int[] data, int algorithm) { JqEb;NiP)5
impl[algorithm-1].sort(data); :8]6#c6`74
} e=J*Esc@k
sam[s4@eQ
public static interface Sort { 26PD[af64O
public void sort(int[] data); x4 hO$3o
} `]{Psc6_=
,`)OEI|1d
public static void swap(int[] data, int i, int j) { kfK[u/<i
int temp = data; (9'be\
data = data[j]; Yb9cW\lr
data[j] = temp; vJThU$s-
} ?*+1~m>
} 7@a\*|K6