[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; "wF*O"WQo
} Ag<4r
int i1=l; c.\:peDk
int i2=mid+1; Vj29L?3
for(int cur=l;cur<=r;cur++){ [KD}U-(Wg
if(i1==mid+1) g8Ok ^
data[cur]=temp[i2++]; rrbZ+*U
else if(i2>r) Re7{[*Q4
data[cur]=temp[i1++]; +6uOg,;
else if(temp[i1] data[cur]=temp[i1++]; Fu#Y7)r
else +OKA_b"wB
data[cur]=temp[i2++]; q~mcjbLz
} ^sJ1 ^LT
} :S#eg1y.w]
gp%tMTI1
} RLv&,$$0
rnJS[o0
改进后的归并排序: 7%W!k zp>
zkH<aLRB
package org.rut.util.algorithm.support; EWSr@}2j .
ws#hhW3qK
import org.rut.util.algorithm.SortUtil; l DgzM3
h)"'YzCt
/** zj%cd;
* @author treeroot D5}DV
* @since 2006-2-2 pn+D@x#IA
* @version 1.0 'Dnq+
*/ n})
public class ImprovedMergeSort implements SortUtil.Sort { $&bU2]
DrW/KU,{+(
private static final int THRESHOLD = 10; LPsh?Ca?N
%L.lkRs
/* R%Kl&c
* (non-Javadoc) t!NrB X
* FLw[Mg:L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AsV8k_qZL
*/ [ e$]pN%
public void sort(int[] data) { XA=|]5C
int[] temp=new int[data.length]; _.u~)Q`6
mergeSort(data,temp,0,data.length-1); \?aOExG I
} % E<FB;h
JiG8jB7%}
private void mergeSort(int[] data, int[] temp, int l, int r) { ^XtHF|%0T
int i, j, k; fN~8L}!l
int mid = (l + r) / 2; ^!N;F"
if (l == r) Vx0MG{vG1
return; 7MR:X#2v>
if ((mid - l) >= THRESHOLD) :h3#1fko
mergeSort(data, temp, l, mid); !$g(&
else avF&F
insertSort(data, l, mid - l + 1); f:)]FHPB1
if ((r - mid) > THRESHOLD) QSO5 z2|
mergeSort(data, temp, mid + 1, r); hj%}GP{{
else aMe%#cLI
insertSort(data, mid + 1, r - mid); =iA"; x
r9U[-CX:"
for (i = l; i <= mid; i++) { wCqE4i
temp = data; +3(CGNE
} 6,sRavs
for (j = 1; j <= r - mid; j++) { Y;~EcM
temp[r - j + 1] = data[j + mid]; rCV$N&rK
} <e@I1iL37y
int a = temp[l]; !H2C9l:rd
int b = temp[r]; MZgmv
for (i = l, j = r, k = l; k <= r; k++) { &Z#Vw.7U
if (a < b) { 8Xt=eL/P
data[k] = temp[i++]; "i;*\+x
a = temp; &e5^v
} else { oXu~9'm$
data[k] = temp[j--]; p?EEox
b = temp[j]; y}.y,\S0
} P#M<CG9
} mE)x7
} M$DwQ}Z
$6qR/#74
/** >EPaZp6
* @param data pZNlcB[Qn-
* @param l P7M0Ce~iW
* @param i ^v()iF !
*/ \J#I}-a&j
private void insertSort(int[] data, int start, int len) { ^/4{\3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?,A8 fR
} /jn:e"0~
} J-HabHv
} G5C#i7cpm
} \H}@-*z+)
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堆排序： #RsIxpc
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package org.rut.util.algorithm.support; ^^W`Lh%9
dW] Ej"W
import org.rut.util.algorithm.SortUtil; "'LOaf$X
tFb|y+
/** `0/gs
* @author treeroot c;A ew!
* @since 2006-2-2 0:nt#n~_
* @version 1.0 u!156X?[eU
*/ &AkzSgP
public class HeapSort implements SortUtil.Sort{ Wl}G[>P
`pn-fk
/* (non-Javadoc) lSKv*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QQ2OZy>W
*/ #EwRb<'Em
public void sort(int[] data) { @idp8J [td
MaxHeap h=new MaxHeap(); O>{t}6o
h.init(data); U7f#Z
for(int i=0;i h.remove(); 60SenHKles
System.arraycopy(h.queue,1,data,0,data.length); 7i%P&oB
} m''iE
)Q N=>J
private static class MaxHeap{ v:!7n
FL*w(Br.
void init(int[] data){ n,R[O_9u[
this.queue=new int[data.length+1]; 9=sMKc%!-
for(int i=0;i queue[++size]=data; lqwJ F &
fixUp(size); 3vEjf
} _16&K}<
} m78MWz]Yo
Rg!aKdDl$
private int size=0; }tg:DG
Ix l"'Q_z
private int[] queue; aF_ZV bS
y0Q/B|&[
public int get() { xHR+((
return queue[1]; $T@xnZ
} &dHm!b
'FvhzGn9Q
public void remove() { 1]zyME
SortUtil.swap(queue,1,size--); %d~9at6-B
fixDown(1); L<nkI
} A+Pm "|
file://fixdown :7AauoI
private void fixDown(int k) { mqfEs0~I
int j; D=Yag!1
while ((j = k << 1) <= size) { Y_TL4
if (j < size %26amp;%26amp; queue[j] j++; "#"Fp&Z7
if (queue[k]>queue[j]) file://不用交换 % /wP2O<
break; 0zkT8'v
SortUtil.swap(queue,j,k); c&iK+qvh{
k = j; 4FP~+
} AfbA.-
} R2Fh^x
private void fixUp(int k) { clU3#8P!=
while (k > 1) { 9jJ/ RXp
int j = k >> 1; JCMEhI6d*
if (queue[j]>queue[k]) >@92K]J
break; w1/T>o
SortUtil.swap(queue,j,k); MsVI <+JZ
k = j; RHA>fXp
} WSX@0A.&)
} z]R!l%`
mk3e^,[A
} !n?*vN=S
77[;J
} .]d tRH<
y{},{~FA"
SortUtil： "5z6~dq
@):NNbtA
package org.rut.util.algorithm; Bo\dt@0;
X;[zfEB
import org.rut.util.algorithm.support.BubbleSort; '%r@D&*vp
import org.rut.util.algorithm.support.HeapSort; 8 H"f9S=K
import org.rut.util.algorithm.support.ImprovedMergeSort; "/]tFY%Y
import org.rut.util.algorithm.support.ImprovedQuickSort; d?+oT0pCH
import org.rut.util.algorithm.support.InsertSort; bT6)(lm
import org.rut.util.algorithm.support.MergeSort; ff+9(P>*
import org.rut.util.algorithm.support.QuickSort; =2V;B
import org.rut.util.algorithm.support.SelectionSort; m"> =QP
import org.rut.util.algorithm.support.ShellSort; 7XI4=O};&%
,h(+\^ ?,
/** Ydd>A\v\;
* @author treeroot i)^ZH#Gp
* @since 2006-2-2 W1,L>Az^Ts
* @version 1.0 |$-d,] V
*/ -JW6@L@
public class SortUtil { ="nrq&2
public final static int INSERT = 1; M:q;z(
public final static int BUBBLE = 2; ""KN?qh9
public final static int SELECTION = 3; Xcpm?aTo
public final static int SHELL = 4; }(7QJk5 j
public final static int QUICK = 5; 2\8\D^
public final static int IMPROVED_QUICK = 6; g|*eN{g]uE
public final static int MERGE = 7; ;w&yGm
public final static int IMPROVED_MERGE = 8; k=/|?%
public final static int HEAP = 9; B0SmE_u_N
E3C[o! 5
public static void sort(int[] data) { `:
sort(data, IMPROVED_QUICK); g"AfI
} blkJm9]v
private static String[] name={ ^+l\YB7pD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?01""Om
}; K@u."eaD
~rfjQPbh9x
private static Sort[] impl=new Sort[]{ $}c@S0%P"
new InsertSort(), UE;)mZ=l|
new BubbleSort(), sNpBTG@{l
new SelectionSort(), m6ws#%|[
new ShellSort(), '|R@k_nx
new QuickSort(), uTt:/gm
new ImprovedQuickSort(), FwzA_ nn
new MergeSort(), U[ungvU1U
new ImprovedMergeSort(), QKkr~?sTO
new HeapSort() JBJ7k19;
}; ]O ` [v
<UL|%9=~
public static String toString(int algorithm){ 9<r}s
return name[algorithm-1]; p%y\`Nlgdx
} !>);}J!e]
5K-)X9z?
public static void sort(int[] data, int algorithm) { *M<=K.*\G
impl[algorithm-1].sort(data); >43yty\
} ZvKMRW
/'_ RI
public static interface Sort { r/<JY5
public void sort(int[] data); "4AQpD
} ^<Tp-,J$EN
G&H"8REm
public static void swap(int[] data, int i, int j) { QYb?;Z
int temp = data; e%Xf*64
data = data[j]; T1di$8
data[j] = temp; PGhZ`nl
} !27]1%Aw
} U:jf9L2