[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; :z56!qU
} lq}=&)%C
int i1=l; <K%qaf
int i2=mid+1; vX]\Jqy
for(int cur=l;cur<=r;cur++){ 5v=%pQbY
if(i1==mid+1) &eG,CIT
data[cur]=temp[i2++]; `ux U H#
else if(i2>r) D:U:( pg
data[cur]=temp[i1++]; 4T`u?T]
else if(temp[i1] data[cur]=temp[i1++]; }>=k!l{
else 3205gI,
data[cur]=temp[i2++]; \Q|1I
} G@oY2sM"
} 5. 5
@>_`g=
} G\?fWqx
Y5$5qQ
改进后的归并排序: j08}5Eo
cXFNX<
package org.rut.util.algorithm.support; GN /]^{D
_p\
import org.rut.util.algorithm.SortUtil; FRQ0tIp
G,e>dp_cPu
/** EkgS*q_
* @author treeroot lplEQ]J|
* @since 2006-2-2 WLQm|C,
* @version 1.0 P&V,x`<Z
*/ .dt7b4.kd
public class ImprovedMergeSort implements SortUtil.Sort { _$s9o$8$
L"&j(|{
private static final int THRESHOLD = 10; XL>cTM
yo`Jp$G
/* V]tucs
* (non-Javadoc) AqZ{x9g!
* 3XYCtp8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ra}%:
*/ Q9H~B`\nQ
public void sort(int[] data) { D'F=v\P
int[] temp=new int[data.length]; X#j-Ld{j
mergeSort(data,temp,0,data.length-1); Wjn1W;m&g
} >c*}Do{lG
Cb7f-Eag
private void mergeSort(int[] data, int[] temp, int l, int r) { tI|?k(D
int i, j, k; K4YpE}]u
int mid = (l + r) / 2; 'due'|#^
if (l == r) Dj'aWyW'
return; \?{nP6=
if ((mid - l) >= THRESHOLD) %|}obiV)
mergeSort(data, temp, l, mid); ,di'279|
else ~Jrtm7
insertSort(data, l, mid - l + 1); cH?j@-pY
if ((r - mid) > THRESHOLD) Q"n*`#Yt'
mergeSort(data, temp, mid + 1, r); +pZ, RW.D
else q{HfT d
insertSort(data, mid + 1, r - mid); $NC1>83
X}Bo[YoY$
for (i = l; i <= mid; i++) { iY1%"x
temp = data; @cA`del
} d!5C$C/x
for (j = 1; j <= r - mid; j++) { x+x6F
temp[r - j + 1] = data[j + mid]; +!6aB|-
} "rOe J~4 X
int a = temp[l]; $@"o BCc
int b = temp[r]; ,4zwd@&O
for (i = l, j = r, k = l; k <= r; k++) { 3`S|I_$(T"
if (a < b) { ?F1NZA[%t
data[k] = temp[i++]; oMawINDa
a = temp; %Sr/'7 K
} else { I *YO
data[k] = temp[j--]; ZdJwy%
b = temp[j]; 3e~ab#/
} "Kx2k>ym
} [,Q(~Qb
} jFY6}WY)}7
D::$YR ~R
/** RO+B/)~0<
* @param data 19Xc0ez
* @param l m=<Tylv
* @param i u[q1]]
*/ -B-?z?+(O
private void insertSort(int[] data, int start, int len) { YjN2 ,Xi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ! /;@kXN
} Fk@A;22N
} bmgK6OyVR
} /. GHR
} FtXd6)_S
}CnqJ@>C5
堆排序： R("g ]
\>0%E{CR
package org.rut.util.algorithm.support; wDswK "T
T+ey>[
import org.rut.util.algorithm.SortUtil; ,ef"S r
}'mVD^<+
/** WJbdsPs
* @author treeroot NWWag}
* @since 2006-2-2 L1A0->t
* @version 1.0 ?muI8b
*/ MG)wVS<d_
public class HeapSort implements SortUtil.Sort{ M>W-lp^3
,3l=44*
/* (non-Javadoc) ~SgW+sDFu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tgXIj5z
*/ {j i;~9'Q
public void sort(int[] data) { i1k(3:ay<
MaxHeap h=new MaxHeap(); yQ5&S]Xk$$
h.init(data); c`}-i6
for(int i=0;i h.remove(); ivg:`$a[
System.arraycopy(h.queue,1,data,0,data.length); :9un6A9JS
} )';Rb$<Qn
Jlw%t!Kx
private static class MaxHeap{ Tap=K|b ]
AoB~ZWq
void init(int[] data){ jiQJ{yY
this.queue=new int[data.length+1]; 0f~7n*XH
for(int i=0;i queue[++size]=data; u=NpL^6s<
fixUp(size); 2<HG=iSf
} I;H6E
} d#P3 <
CBw/a0Uck
private int size=0; EV{kd.=f
'{=dEEi
private int[] queue; 1-[~}
gM_z`H5[!
public int get() { R\k= CoJJ
return queue[1]; pwo5Ij,~q
} ?&#z3c$}
KNT(lA0s
public void remove() { a)J3=Z-
SortUtil.swap(queue,1,size--); #v!(uuq,
fixDown(1); EOJk7
} "{>I5<:t
file://fixdown %"tLs%"7=P
private void fixDown(int k) { .2?txOKh
int j; k[lYdk
while ((j = k << 1) <= size) { EQZu-S`kv
if (j < size %26amp;%26amp; queue[j] j++; d~+8ui{-U
if (queue[k]>queue[j]) file://不用交换 8m,PsUp7
break; qjcy{@ j
SortUtil.swap(queue,j,k); 2,,zN-9mt
k = j; 9Fb|B
} YI05?J}
} T \%{zz_(
private void fixUp(int k) { s`"o-w\$>
while (k > 1) { [DrG;k?
int j = k >> 1; Ei!t#'*D<
if (queue[j]>queue[k]) 3GVE/GtU
break; )9'eckt
SortUtil.swap(queue,j,k); *>Sb4:
k = j; `k y>M-
} k^3 ?Z2a
} Z#7T!/28
*:t]|$;E\
} i!8 o(!I
~5Wr |qg%{
} 'Gwa[ |6i
wn*<.s
SortUtil： 0l-m:6
ghvF%-."1
package org.rut.util.algorithm; mNkS!(L6
LB`=+FD
import org.rut.util.algorithm.support.BubbleSort; }G^Bc4@b
import org.rut.util.algorithm.support.HeapSort; 0CXh|AU
import org.rut.util.algorithm.support.ImprovedMergeSort; p\lS)9
import org.rut.util.algorithm.support.ImprovedQuickSort; S%KY%hUt
import org.rut.util.algorithm.support.InsertSort; &_X6m0z
import org.rut.util.algorithm.support.MergeSort; =Gsn4>~%n
import org.rut.util.algorithm.support.QuickSort; vqh@)B+)
import org.rut.util.algorithm.support.SelectionSort; c\GJfsVk
import org.rut.util.algorithm.support.ShellSort; K"'W4bO#7
&8!*u3
/** c%1<O!c
* @author treeroot *&p`8:
* @since 2006-2-2 zTi%j$o
* @version 1.0 ;)Rvk&J5
*/ |k5uVhN
public class SortUtil { d{_tOj$
public final static int INSERT = 1; [@D+kL*>
public final static int BUBBLE = 2; WK7=z3mu
public final static int SELECTION = 3; U9:?d>7
public final static int SHELL = 4; ,EPs>#d
public final static int QUICK = 5; sO7$b@"u.
public final static int IMPROVED_QUICK = 6; @91Q=S
public final static int MERGE = 7; c +Pg[1-
public final static int IMPROVED_MERGE = 8; `>:ozN#)\
public final static int HEAP = 9; 7{=<_
Kj[X1X5
public static void sort(int[] data) { &.k'Dj2hf
sort(data, IMPROVED_QUICK); |~mq+:44+
} I#(D.\P
private static String[] name={ ^bpxhf x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ',-4o-
}; v=Ep
_%WJ7~>
private static Sort[] impl=new Sort[]{ pQ0yZpN%;
new InsertSort(), RB1c!h$u
new BubbleSort(), cVv>"oF;~*
new SelectionSort(), PAF2=
new ShellSort(), e6s-;
new QuickSort(), ) *:<3g!
new ImprovedQuickSort(), =\s(v-8
new MergeSort(), *yAC8\v
new ImprovedMergeSort(), rg U$&O
new HeapSort() /'U/rjb_h{
}; /7Z0|Zw]
#5HJW[9
public static String toString(int algorithm){ 5A]IiX4Z
return name[algorithm-1]; Zf;1U98oC
} z,XM|-"#<K
1G/bqIMg63
public static void sort(int[] data, int algorithm) { Ve>*KHDSt
impl[algorithm-1].sort(data); S3nA}1R
} F?2(U\k#
vPuPSE%M
public static interface Sort { xM85^B'
public void sort(int[] data); k1y&'3%
} @Tmqw(n{
` c~:3^?9d
public static void swap(int[] data, int i, int j) { (mXV5IM
int temp = data; 'qBg^c
data = data[j]; -05zcIVo
data[j] = temp; oD_'8G}
} eN]0]9JO
} s]Z/0:`