[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; [RXLR#
} K+)3 LR^
int i1=l; 6,5h4[eF*
int i2=mid+1; NFTv4$5d
for(int cur=l;cur<=r;cur++){ rXW.F'=K6
if(i1==mid+1) a{xJ#_/6
data[cur]=temp[i2++]; qy'-'UlIr
else if(i2>r) {dxFd-K3
data[cur]=temp[i1++]; tMw65Xei6b
else if(temp[i1] data[cur]=temp[i1++]; 4FzTf7h^
else 9D14/9*(dU
data[cur]=temp[i2++]; ~Eg]Auk7
} },d^y:m
} K~d'*J-
ymm]+v5S.]
} dU9;sx
_&]7
改进后的归并排序: yP7b))AW9
R3G\Gchd
package org.rut.util.algorithm.support; f"Iui
[~8U],?1
import org.rut.util.algorithm.SortUtil; t]SB.ja
-+[Lc_oNPx
/** ;j9%D`u<
* @author treeroot *OA(v^@tx7
* @since 2006-2-2 6CFnE7TQf
* @version 1.0 nFJW\B&(`
*/ f+9eB
public class ImprovedMergeSort implements SortUtil.Sort { wn@~80)$
Gy\]j
private static final int THRESHOLD = 10; (l%?YME
}<~(9_+
/* <%YW/k"o
* (non-Javadoc) =6U5^+|d
* x1Gx9z9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2OUx@Vj
*/ dm}1"BU<
public void sort(int[] data) { lW5Lwyt8
int[] temp=new int[data.length]; E0I/]0
mergeSort(data,temp,0,data.length-1); _]@u)$
} cD]H~D}M
rG?5z"
private void mergeSort(int[] data, int[] temp, int l, int r) { q;#AlquY@
int i, j, k; ;SE*En
int mid = (l + r) / 2; GZi`jp
if (l == r) gM&O dT+i
return; @2T8H
if ((mid - l) >= THRESHOLD) }vh <x6
mergeSort(data, temp, l, mid); `V9bd}M%~;
else H<|}pZ
insertSort(data, l, mid - l + 1); S"*k#ao
if ((r - mid) > THRESHOLD) B9|s`o)!
mergeSort(data, temp, mid + 1, r); %l8!p'a
else LBq2({="
insertSort(data, mid + 1, r - mid); ftpPrtaP
a+HK fK
for (i = l; i <= mid; i++) { O#k; O*s'
temp = data; |= cc>]
} X'b3CS4
for (j = 1; j <= r - mid; j++) { cO]w*Hti
temp[r - j + 1] = data[j + mid]; rmggP(
} 2pmj*Y3"8
int a = temp[l]; K&&T:'=/
int b = temp[r]; 3ibQbk
for (i = l, j = r, k = l; k <= r; k++) { {X<g93
if (a < b) { j5DCc,s
data[k] = temp[i++]; C7F\Y1Wj
a = temp; OCu_v%G0
} else { 1Du5Z9AM
data[k] = temp[j--]; "Bwz Fh
b = temp[j]; 0\U*
} a>l,H#w*vW
} Tv1oy%dK
} s<LnUF1b
x"sbm
/** D7nK"]HG;l
* @param data O[= L#wi
* @param l 8Tg1 >q<
* @param i K!ILO
*/ 3Qd/X&P
private void insertSort(int[] data, int start, int len) { TO]7cC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }J6:D]Q
} ^;ZpK@Luk
} -HGRrWS
} Yr"Of*VNH
} &[{sA;
)C"ixZ>2xQ
堆排序： $1B?@~&
0R? @JC
package org.rut.util.algorithm.support; h!uyTgq
Y=|p}>.}
import org.rut.util.algorithm.SortUtil; %\HE1d5;
fZpi+I
/** J:"@S%gy%
* @author treeroot LU;zpXg\
* @since 2006-2-2 @]IRB1X
* @version 1.0 cY5;~lO
*/ OvQzMXU^I
public class HeapSort implements SortUtil.Sort{ xTuJ~$(
m-$}'mEO
/* (non-Javadoc) EpO2%|@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @5wc 3y
*/ "f 89
public void sort(int[] data) { |hj!NhBe
MaxHeap h=new MaxHeap(); (/nnN4\=
h.init(data); DzMg^Kp
for(int i=0;i h.remove(); E9mu:T
System.arraycopy(h.queue,1,data,0,data.length); h2x9LPLBxT
} baD063P;
bK!h{Rr
private static class MaxHeap{ C_>XtcU
oh:9v+
void init(int[] data){ %\,9S`0
this.queue=new int[data.length+1]; _BA; H+M
for(int i=0;i queue[++size]=data; LI@BB:)[
fixUp(size); #8M?y*<I
} :QP1!
} ~}j+~
)EB+(c~E
private int size=0; vu@.;-2E%
'fl.&"/r
private int[] queue; {H(l"KuL
.xwskzJ3
public int get() { pTi7Xy!Cw
return queue[1]; 9tv,,I;iU
} bwhH2^ !
"[P3b"=gW
public void remove() { MG=8`J-`
SortUtil.swap(queue,1,size--); O'IU1sU
fixDown(1); Q<u?BA/
} :8eI_X
file://fixdown ?R)dxuj
private void fixDown(int k) { #S9J9k
int j; {|>Wwa2e
while ((j = k << 1) <= size) { [m{sl(Q
if (j < size %26amp;%26amp; queue[j] j++; N,K/Ya)1
if (queue[k]>queue[j]) file://不用交换 wH!$TAZ:Yw
break; O<Q8%Az
SortUtil.swap(queue,j,k); mrRid}2
k = j; izcaWt3 a
} XX/s@C
} 17?YN<
private void fixUp(int k) { UJh;Hp:
while (k > 1) { 1xEOYM)
int j = k >> 1; =q]!"yU[d
if (queue[j]>queue[k]) I ?Dp*u*
break; ;6``t+]q
SortUtil.swap(queue,j,k); Z6${nUX
k = j; kd!?N
} @kh<b<a4
} 4j=K3m
JqMF9|{H
} 6Jq[]l"v
,k~' S~w.
} 1UJrPM%
V6P-?Nd
SortUtil： p&RC#wYu
siI%6Gn;
package org.rut.util.algorithm; `WXlq#:K
>nSt<e
import org.rut.util.algorithm.support.BubbleSort; Rs5lL-I
import org.rut.util.algorithm.support.HeapSort; \X&8EW
import org.rut.util.algorithm.support.ImprovedMergeSort; Z[IM\# "
import org.rut.util.algorithm.support.ImprovedQuickSort; LWJ ?p-X
import org.rut.util.algorithm.support.InsertSort; '42$O
import org.rut.util.algorithm.support.MergeSort; I4jRz*Ufe?
import org.rut.util.algorithm.support.QuickSort; {rR(K"M
import org.rut.util.algorithm.support.SelectionSort; }r@dZBp:
import org.rut.util.algorithm.support.ShellSort; 9}9VZ r?
J6s]vV q"
/** -ymDRoi
* @author treeroot -MS#YcsV
* @since 2006-2-2 ]87BP%G
* @version 1.0 :sg}e
*/ Dj96t5R
public class SortUtil { )%Fwfb
public final static int INSERT = 1; lvWwr!w
public final static int BUBBLE = 2; an"~n`g
public final static int SELECTION = 3; NCkI[d]B@
public final static int SHELL = 4; ISNL='%
public final static int QUICK = 5; wxvi)|)
public final static int IMPROVED_QUICK = 6; VSY p
public final static int MERGE = 7; h*l$!nEN
public final static int IMPROVED_MERGE = 8; =XR6rR8
public final static int HEAP = 9; \wA:58 -j
Cty#|6k
public static void sort(int[] data) { ` 'Qb?F6
sort(data, IMPROVED_QUICK); K2M=)B
} =D$ED^W
private static String[] name={ %a~/q0o>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5_'lu
}; &;-zy%#l
U)bv,{-q
private static Sort[] impl=new Sort[]{ ,J|,wNDU!K
new InsertSort(), =|P &G~]
new BubbleSort(), [o#% Eg;
new SelectionSort(), i$E [@
new ShellSort(), T3P9
new QuickSort(), KCTX2eNN&h
new ImprovedQuickSort(), V#dga5*]
new MergeSort(), '?9zL*
new ImprovedMergeSort(), h[]9F.[
new HeapSort() 6"Fn$ :l?
}; t>cGfA
;Z{D@g+
public static String toString(int algorithm){ ElQ?|HsQ6p
return name[algorithm-1]; 7v%c.
} \_1a#|97e
WSHPhhM
public static void sort(int[] data, int algorithm) { nf /*n
impl[algorithm-1].sort(data); p?Azn>qBa
} lNL=Yu2p_
xW`y7Q}p
public static interface Sort { \Vf:/9^
public void sort(int[] data); g&FTX>wX
} g.Xk6"kO
%)r ~GCd
public static void swap(int[] data, int i, int j) { r+FEgSDa]
int temp = data; Gc|)4c
data = data[j]; mtv8Bm=<
data[j] = temp; @[3c1B6K
} S\TXx79PhC
} *vaYI3{qN