[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; %4*c/ c6
} |qw0:c=7!
int i1=l; #3rS{4[
int i2=mid+1; 8zx]/>
for(int cur=l;cur<=r;cur++){ %y6Q3@
if(i1==mid+1) ?),b902C
data[cur]=temp[i2++]; dVb6u
else if(i2>r) OMLU ;,4
data[cur]=temp[i1++]; x?wvS]EBg
else if(temp[i1] data[cur]=temp[i1++]; H3rA ?F#+*
else )s $]+HQs
data[cur]=temp[i2++]; !2|Lb'O
} D;Qx9^.
} D^6*Cwb
1b9S";ct0
} ^+m`mcsE
cZh0\DyU
改进后的归并排序: .C^P6S2oJ
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package org.rut.util.algorithm.support; -8n1y[
aN0[6+KP;
import org.rut.util.algorithm.SortUtil; uos8Mav{E
]@$^Ju,
/** rt+4-WuK>
* @author treeroot ~~/,2^
* @since 2006-2-2 RAO+<m
* @version 1.0 y74Q(
*/ $wUYK%.
public class ImprovedMergeSort implements SortUtil.Sort { =*\.zr
c[Fc3
private static final int THRESHOLD = 10; _KH91$iW8m
,R{&x7
/* 60+zoL'
* (non-Javadoc) 6^b)Q(Edut
* ukR0E4p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XJ<"S p
*/ \L*%?~
public void sort(int[] data) { & &}_[{fc
int[] temp=new int[data.length]; 6(8F4[D
mergeSort(data,temp,0,data.length-1); N )Z>]&5
} 9\_s&p=:.
J8:s=#5
private void mergeSort(int[] data, int[] temp, int l, int r) { C7%R2>}?f
int i, j, k; HgQjw!
int mid = (l + r) / 2; ?Q]&;5o
if (l == r) Z@Rm^g]o
return; .RxTz9(
if ((mid - l) >= THRESHOLD) !PA:#]J
mergeSort(data, temp, l, mid); 6F(z6_<
else ^N={4'G)
insertSort(data, l, mid - l + 1); o[!'JUxZ
if ((r - mid) > THRESHOLD) #p(gB)o:l
mergeSort(data, temp, mid + 1, r); Xw4Eti._D
else *?m)VvR>|
insertSort(data, mid + 1, r - mid); ^Hn}\5
~wa4kS<>
for (i = l; i <= mid; i++) { bgzd($)u
temp = data; Ub3$`
} KtQs uL%
for (j = 1; j <= r - mid; j++) { IO\1nB$0nb
temp[r - j + 1] = data[j + mid]; N'2?Zb
} P'<i3#;7X
int a = temp[l]; bbC@
int b = temp[r]; |xB`cSu(
for (i = l, j = r, k = l; k <= r; k++) { e)e(f"t6Q
if (a < b) { iV{_?f1jo
data[k] = temp[i++]; 5=TgOS]R
a = temp; +p\E%<uQ
} else { t1Ts!Q2
data[k] = temp[j--]; 31G:[;g
b = temp[j]; H(^Ehv>
} Q,NnB{R
} ;<FAcR
} 1GN^uia7
Vl^x_gs#_]
/** )?jFz'<r
* @param data F8w7N$/V",
* @param l 2? E;(]dQ
* @param i s,_+5ukv
*/ mlByE,S2E
private void insertSort(int[] data, int start, int len) { ROkwjw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UuIjtqW
} kQ=bd{a6
} ,ojJ;w5D
} 5X0ex.
} 7@{%S~TN
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堆排序： XoyxS:=>|[
g=td*S
package org.rut.util.algorithm.support; .w4|$.H
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import org.rut.util.algorithm.SortUtil; URVW5c
( %7V
/** xI<l1@
* @author treeroot 8J,^O04<
* @since 2006-2-2 `O7vPE
* @version 1.0 ]{tWfv|Xg8
*/ :Ou~?q%X
public class HeapSort implements SortUtil.Sort{ 6@|!m'
91z=ou
/* (non-Javadoc) jZIT[HM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cs2-jbRn
*/ 72|gzm
public void sort(int[] data) { _L8&.=4]i
MaxHeap h=new MaxHeap(); 7}xQ4M\u$
h.init(data); \0|x<~#j'
for(int i=0;i h.remove(); HP*)^`6X
System.arraycopy(h.queue,1,data,0,data.length); jO"/5x26
} +/&rO,Ql
@C-dCC?
private static class MaxHeap{ }<G ae5
(lwV(M
void init(int[] data){ ` ,T.
this.queue=new int[data.length+1]; b#7nt ?`7p
for(int i=0;i queue[++size]=data; (B` NnL$
fixUp(size); $U,]c
} jpi,BVTI-X
} JSg=9p$
nIH(2j
private int size=0; yi^X?E{WnX
7NEOaX(J9
private int[] queue; OC5oxL2HTe
0084`&Ki
public int get() { B)/&xQu
return queue[1]; EW]DzL3
} >0kL9_9{
44QW&qL!(
public void remove() { mTH[*Y,
SortUtil.swap(queue,1,size--); Fz8& Jn!
fixDown(1); WA}'[h
} T72Li"00
file://fixdown wPghgjF{
private void fixDown(int k) { 8k{XUn
int j; ?o V.SG'
while ((j = k << 1) <= size) { fe4/[S{a
if (j < size %26amp;%26amp; queue[j] j++; OY"BaSEOw}
if (queue[k]>queue[j]) file://不用交换 q|YnNk>1
break; ^/2O_C
SortUtil.swap(queue,j,k); $I`,nN
k = j; (6[<+j&.
} o ^w^dgJ
} +2E~=xX
private void fixUp(int k) { ~DLxIe
while (k > 1) { )cN=/i
int j = k >> 1; 1 =?pL$+G
if (queue[j]>queue[k]) d>M0:
break; XPYf1H
SortUtil.swap(queue,j,k); lN.&46 e
k = j; F\+9u$=
} j; /@A lZl
} SFWS<H(IN
5UL5C:3R9
} `iuQ.I
3 } $9./+
} M|{KQ3q:9
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SortUtil： +SV!QMIg
:^7_E&
package org.rut.util.algorithm; K0*er
E#w2'(t
import org.rut.util.algorithm.support.BubbleSort; I2{zy|&
import org.rut.util.algorithm.support.HeapSort; .O5|d+S
import org.rut.util.algorithm.support.ImprovedMergeSort; #;2mP6a[
import org.rut.util.algorithm.support.ImprovedQuickSort; :@~3wD[y
import org.rut.util.algorithm.support.InsertSort; _uh@fRyh
import org.rut.util.algorithm.support.MergeSort; @zR_[s
import org.rut.util.algorithm.support.QuickSort; };(2 na
import org.rut.util.algorithm.support.SelectionSort; o) eW5s,6
import org.rut.util.algorithm.support.ShellSort; .Xta;Py|J
%|}7YH41
/** l5e`m^GK
* @author treeroot IxG0TJ_
* @since 2006-2-2 Qe[ai?iJkt
* @version 1.0 k:s86q
*/ -% B)+yq>
public class SortUtil { k<*1mS8
public final static int INSERT = 1; ,J*#Ixe}
public final static int BUBBLE = 2; a;7gy419<p
public final static int SELECTION = 3; blV'-Al
public final static int SHELL = 4; d#,
public final static int QUICK = 5; TGPdi5Eq
public final static int IMPROVED_QUICK = 6; iaJN~m\ M
public final static int MERGE = 7; ;f3))x
public final static int IMPROVED_MERGE = 8; K!jau|FS
public final static int HEAP = 9; 1eqFMf
w RTzpG4
public static void sort(int[] data) { NLWj5K)1P
sort(data, IMPROVED_QUICK); 9LEUj
} $<wU>X
private static String[] name={ K0^+2lx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %]DJ-7 xE
}; UJX5}36
{7Ez7'SVV
private static Sort[] impl=new Sort[]{ ctC!b{S"@
new InsertSort(), kZ_5R#xK
new BubbleSort(), ~o;*{ Q
new SelectionSort(), YF");itH
new ShellSort(), eR1]<Z$W\
new QuickSort(), =uR[Jewa
new ImprovedQuickSort(), a67NWH
new MergeSort(), Xo4K!U>TzZ
new ImprovedMergeSort(), fl9J
new HeapSort() !P:~oo=
}; 47/YDy%
`WU"*HqW
public static String toString(int algorithm){ 1lUY27MF
return name[algorithm-1]; "6'# L,
} U}`HN*Q.q
ErMA$UkJ
public static void sort(int[] data, int algorithm) { Y'LIk Q\
impl[algorithm-1].sort(data); g60rm1b
} 2ap0/l[
7+p=4i^@Zs
public static interface Sort { h "r)z6Q/
public void sort(int[] data); wvSaq+N
} 0/%VejZ'
R75np^
public static void swap(int[] data, int i, int j) { Yg7C"3;Vt
int temp = data; Q,f5r%A.
data = data[j]; *j= whdw%J
data[j] = temp; 2:S 4M.j
} ;-sF%c
} Hb *&&