[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; G<e+sDQ2
} q13fmK(n-5
int i1=l; -*' ?D@l
int i2=mid+1; 4>=M"DhB
for(int cur=l;cur<=r;cur++){ BQ0?B*yqd
if(i1==mid+1) >8_y-74
data[cur]=temp[i2++]; 7A\`
else if(i2>r) ?YW~7zG
data[cur]=temp[i1++]; 3W7^,ir
else if(temp[i1] data[cur]=temp[i1++]; :awkhx
else OP1`!P y
data[cur]=temp[i2++]; LZn'+{\`
} &`I(QY
} zG#5lzIu,
F,Q;sq
} 3P6O]x<-?
'nq=xi@RC
改进后的归并排序: 'IX1WS&\"
L*Z.T^h
package org.rut.util.algorithm.support; 3[[oAp
DzGUKJh6
import org.rut.util.algorithm.SortUtil; }_'5Vb_
#SHeK 4
/** RxMsP;be
* @author treeroot *)Qv;'U=rn
* @since 2006-2-2 Z6zV 9hn
* @version 1.0 %XGm\p
*/ 5)RZJrN]
public class ImprovedMergeSort implements SortUtil.Sort { !d N[9}
O6hzOyNX@
private static final int THRESHOLD = 10; /xk7Z q
pJ] Ix *M
/* "#iJ/vy
* (non-Javadoc) _p*9LsN$L
* =IC.FT}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mITB\,,G
*/ @PvO;]]%
public void sort(int[] data) { o^@"eG$,
int[] temp=new int[data.length]; 'GJB9i+a^
mergeSort(data,temp,0,data.length-1); \C3I6Qx
} XYo,5-
5*$yY-A
private void mergeSort(int[] data, int[] temp, int l, int r) { O=2|'L'h!
int i, j, k; I_<VGUk
int mid = (l + r) / 2; 6j(/uF4!#
if (l == r) ln82pQD2Y~
return; h-P|O6@Ki
if ((mid - l) >= THRESHOLD) V\Cl""`XN
mergeSort(data, temp, l, mid); 3s%?)z
else N[/<xW~x?4
insertSort(data, l, mid - l + 1); pt<zyH3Z
if ((r - mid) > THRESHOLD) E@SFK=`
mergeSort(data, temp, mid + 1, r); =K`.$R
else \1<'XVS
insertSort(data, mid + 1, r - mid); :.x(( FU
"|8oFf)l@B
for (i = l; i <= mid; i++) { aO&U=!
temp = data; 5%Qxx\q
} bTD?uX!^@
for (j = 1; j <= r - mid; j++) { cT'Bp)a
temp[r - j + 1] = data[j + mid]; ^#:;6^Su
} 6j6CA?|
int a = temp[l]; }:#WjH^
int b = temp[r]; LL(xi )
for (i = l, j = r, k = l; k <= r; k++) { 8S1@,O,
if (a < b) { Pp_4B
data[k] = temp[i++]; 7S{qo&j'
a = temp; L"bJ#0m
} else { |owr?tC
data[k] = temp[j--]; {zb'Z Yz
b = temp[j]; cZh0\DyU
} .C^P6S2oJ
} huC{SzXM
} +Ryj82;59z
G WIsT\J
/** ;b{#$#`=
* @param data ]pR?/3
* @param l arL>{mj
* @param i 7H3v[ f^Q
*/ [inlxJD
private void insertSort(int[] data, int start, int len) { >-MnB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <[db)r~c
} v+nXKNL
} H~j@n!)
} jSem/;
} Av.tr&ZNb
Y7t#)?
堆排序： /I7V\
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package org.rut.util.algorithm.support; cu/"=]D
N )Z>]&5
import org.rut.util.algorithm.SortUtil; W;OGdAa_
_EMI%P&s
/** gQ\.|'%
* @author treeroot Orq/38:4G
* @since 2006-2-2 agUdI_'~@9
* @version 1.0 ^)dsi
*/ CPJ<A,V
public class HeapSort implements SortUtil.Sort{ S\:^#Yi`
[K4cxqlfk
/* (non-Javadoc) bgzd($)u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ub3$`
*/ lM\dK)p21O
public void sort(int[] data) { WESD^FK
MaxHeap h=new MaxHeap(); bsQ'kBD
h.init(data); NljpkeX'
for(int i=0;i h.remove(); (ks>F=vk*
System.arraycopy(h.queue,1,data,0,data.length); I*-\u
} 8&@=Anc&q
m^ xTV-#l@
private static class MaxHeap{ e)e(f"t6Q
6Ryc&z5
void init(int[] data){ |ty&}'6C
this.queue=new int[data.length+1]; )U\i7[k>
for(int i=0;i queue[++size]=data; ]ae(t`\l^
fixUp(size); !`{?qQ[=
} XVs]Y'*x
} mV^w|x
M XG>|
private int size=0; (:bf m
:qo[@x{
private int[] queue; tiZH;t';<
=IL\T8y09
public int get() { 1GN^uia7
return queue[1]; FF8jW1
} &y_t,8>5
?\\wLZ
public void remove() { 8-G )lyfj
SortUtil.swap(queue,1,size--); Q6(~VvC-
fixDown(1); Y(,RJ&7
} M ygCg(h
file://fixdown Gpu[<Z4
private void fixDown(int k) { )?72 +X
int j; ci;2XLAM
while ((j = k << 1) <= size) { .F ?ww}2p]
if (j < size %26amp;%26amp; queue[j] j++; /gu VA
if (queue[k]>queue[j]) file://不用交换 "(mJupI
break; I"x'
SortUtil.swap(queue,j,k); *8)?ZZMM
k = j; F+*E}QpM
} 6[t<g=
} ~ikp'5
private void fixUp(int k) { ?62zv[#
while (k > 1) { hrniZ^
int j = k >> 1; [+WsVwyf?
if (queue[j]>queue[k]) VESvCei
break; M{L<aYe
SortUtil.swap(queue,j,k); 0L>3i8'
k = j; @ 51!3jeu
} va@;V+cD
} ;W{z"L;nX
>9w^C1"
} `*U@d%a
e,OXngC
} r8(oTx
3Y P! B=
SortUtil： C6gSj1
6O/L~Z*t
package org.rut.util.algorithm; ~;(\a@ _
cEHpa%_5
import org.rut.util.algorithm.support.BubbleSort; IEm?'o:
import org.rut.util.algorithm.support.HeapSort; u/W{JPlL
import org.rut.util.algorithm.support.ImprovedMergeSort; R V#w0 r
import org.rut.util.algorithm.support.ImprovedQuickSort; 7b1 yF,N
import org.rut.util.algorithm.support.InsertSort; "*zDb|v
import org.rut.util.algorithm.support.MergeSort; }zA|M9%E
import org.rut.util.algorithm.support.QuickSort; ?Z|y-4 &>
import org.rut.util.algorithm.support.SelectionSort; _CNXyFw.7
import org.rut.util.algorithm.support.ShellSort; %>K(IRpMW
Rc)]A&J
/** UW":&`i
* @author treeroot H'S~GP4D
* @since 2006-2-2 m&AbH&;
* @version 1.0 Cnpl0rV~5
*/ p cD}SY
public class SortUtil { %#%YU|4R
public final static int INSERT = 1; 4"PA7 e
public final static int BUBBLE = 2; OC5oxL2HTe
public final static int SELECTION = 3; 0084`&Ki
public final static int SHELL = 4; B)/&xQu
public final static int QUICK = 5; EW]DzL3
public final static int IMPROVED_QUICK = 6; x6>WvFZ
public final static int MERGE = 7; 44QW&qL!(
public final static int IMPROVED_MERGE = 8; bHTf{=
public final static int HEAP = 9; (l][_6Q
Cdl"TZ<
public static void sort(int[] data) { jGLmgJG-P
sort(data, IMPROVED_QUICK); ~H''RzN
} <c@dE
private static String[] name={ 4PSbr$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TFbc@rfB
}; n}NUe`E_h
]UOzz1
private static Sort[] impl=new Sort[]{ MeD/)T{G~
new InsertSort(), ft8
new BubbleSort(), ++2a xRl
new SelectionSort(), qw4wg9w5p
new ShellSort(), }Bh\N5G%
new QuickSort(), '1!%yKc0
new ImprovedQuickSort(), S%p,.0_
new MergeSort(), ^p4`o>
new ImprovedMergeSort(), \R&ZWJKh
new HeapSort() >CCy2W^W
}; s,J\nbj0h
f[zKA{R
public static String toString(int algorithm){ jhG6,;1zMI
return name[algorithm-1]; *mWS+xcU(L
} !OV+2suu1
fpNq
public static void sort(int[] data, int algorithm) { 7TX$
impl[algorithm-1].sort(data); [e=k<gKH
} &hpznIN
]I~BgE;C9
public static interface Sort { 5'Mw{`
public void sort(int[] data); U&kdR+dB
} Mn\L55?E(
sC.cMZe
public static void swap(int[] data, int i, int j) { bN*zx)f
int temp = data; }2y"F@{T
data = data[j]; a6T!)g
data[j] = temp; q+YK NXI
} <y-2ovw*
} yj,+7[)