[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; 4wzlJ19E(
} gB,G.QM*6
int i1=l; :S@1
int i2=mid+1; #(Or|\t
for(int cur=l;cur<=r;cur++){ }]1BO
if(i1==mid+1) \h<BDk*
data[cur]=temp[i2++]; 89}Y5#W
else if(i2>r) 6Sj6i^"
data[cur]=temp[i1++]; Cm$1$?J
else if(temp[i1] data[cur]=temp[i1++]; f67NWFX
else 4o:hyh
data[cur]=temp[i2++]; R$kpiqK
} '&O/g<Z}q
} ^(}585b
NMO-u3<6.
} w JwX[\
xZ5M/YSyG
改进后的归并排序: wle@vCmr
fBtm%f
package org.rut.util.algorithm.support; W|k0R4K]]
ajl 2I/D
import org.rut.util.algorithm.SortUtil; ChryJRuwv5
Bc-yxjsw
/** bSwWszd~
* @author treeroot ({0)@+V8
* @since 2006-2-2 OIHz I2{
* @version 1.0 u]^N&2UW
*/ [mxTa\
public class ImprovedMergeSort implements SortUtil.Sort { Dz=k7zRg"
&}mw'_ I
private static final int THRESHOLD = 10; (oK^c-x
aFiCZHohw
/* DH DZ_t:
* (non-Javadoc) eg"Gjp-4=
* _zxLwU1(x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kU5.iK'
*/ EY`H}S!xy
public void sort(int[] data) { g_*T?;!.U
int[] temp=new int[data.length]; h<l1]h+x
mergeSort(data,temp,0,data.length-1); E{xVc;t
} pqM~l&
*MNHT`Y^o
private void mergeSort(int[] data, int[] temp, int l, int r) { d<w~jP\
int i, j, k; (fD ;g9
int mid = (l + r) / 2; h 6G/O`:
if (l == r) 0rk]/--FGJ
return; jcCoan
if ((mid - l) >= THRESHOLD) M/D)".;
mergeSort(data, temp, l, mid); B (/U3}w-
else pZZgIw}aS
insertSort(data, l, mid - l + 1); LgmvKW|
if ((r - mid) > THRESHOLD) &MR/6"/s
mergeSort(data, temp, mid + 1, r); z9 u$~
else D;GD<zC]
insertSort(data, mid + 1, r - mid); qVjWV$j
5lKJll^2:
for (i = l; i <= mid; i++) { %ugHhS!
temp = data; 1 "TVRb
} =6FUNvP#8
for (j = 1; j <= r - mid; j++) { z><5R|Gf
temp[r - j + 1] = data[j + mid]; ?71+f{s
} (%CZ*L[9Z
int a = temp[l]; Ph&urxH@
int b = temp[r]; 5\mTr)\R
for (i = l, j = r, k = l; k <= r; k++) { fjo{av~]y
if (a < b) { n6WY&1ZE~
data[k] = temp[i++]; 3OyS8`
a = temp; LL^q1)o
} else { P=N$qz$U
data[k] = temp[j--]; ,?UM;^
b = temp[j]; 75!9FqMZ}
} 5/",<1
} 6[qA`x#
} pN6%&@) =
x"kjs.d7[<
/** }*]B-\>
* @param data s6*ilq1
* @param l .%EL\2
* @param i uxn)R#?
*/ kEeo5XN
private void insertSort(int[] data, int start, int len) { K`}{0@ilCw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %Kh4m7
} 8rZ!ia!
} JG`Q;K
} <E;pgw!
} aeyNdMk-
D'<VYl"/
堆排序： l@j.hTO<
!9*c8bL D
package org.rut.util.algorithm.support; A*h{Lsx;
aIy*pmpD=
import org.rut.util.algorithm.SortUtil; iq#b#PYA
lLq<xf
/** .%BT,$1K
* @author treeroot #TK~eHi
* @since 2006-2-2 BC>=B@H0
* @version 1.0 i=a-<A5x
*/ 2'jOP"G
public class HeapSort implements SortUtil.Sort{ s1Ok|31|
k;PAh>8
/* (non-Javadoc) 2A`A\19t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %m,6}yt
*/ ha@L94Lq
public void sort(int[] data) { @tohNO>
MaxHeap h=new MaxHeap(); 'XQ`g CF=
h.init(data); <oKGD50#
for(int i=0;i h.remove(); $\o{_?}1
System.arraycopy(h.queue,1,data,0,data.length); DDT_kK;
} m~#!
:,;K>l^U
private static class MaxHeap{ l:;PXy6)
'k;4j|<
void init(int[] data){ B0$:b!
this.queue=new int[data.length+1]; _CBWb
for(int i=0;i queue[++size]=data; <P ,~eX(r
fixUp(size); @[<nQZw:
} W/z7"#
} x_=n-lAF
[u@Jc,
private int size=0; Z 2}ah
<tpmUA[]
private int[] queue; 'crlA~&#/
UsGa
public int get() { X5fmz%VK@
return queue[1]; HjvCujJ
} RpG+>"1]
mOpTzg@
public void remove() { _iKq~\v2
SortUtil.swap(queue,1,size--); HD,xY4q&N
fixDown(1); .Ig+Dj{)
} Ng><n}
file://fixdown h2z_,`iS7
private void fixDown(int k) { 682Z}"I0
int j; eg<bi@C1|
while ((j = k << 1) <= size) { \}6;Kf}\
if (j < size %26amp;%26amp; queue[j] j++; 3<=,1 cU
if (queue[k]>queue[j]) file://不用交换 spU)]4P&
break; 0tISXu-
SortUtil.swap(queue,j,k); bawJ$_O_
k = j; "xcX'F^
} %:>3n8n
} Sw^X2$h
private void fixUp(int k) { 65z"
while (k > 1) { mS>xGtD&K
int j = k >> 1; -aRU]kIf
if (queue[j]>queue[k]) Rtb :nJ8
break; &uP~rEJl+
SortUtil.swap(queue,j,k); o)6pA^+
k = j; U~{du;\
} nKR{ug>I)
} {l_{T4xToB
NW~z&8L
} c,so`I3rI
-yxOBq
} i| \6JpNA:
o:Qv JcB
SortUtil： kK8itO
pY4}>ju(g
package org.rut.util.algorithm; ]&Z))H
A,i75kd
import org.rut.util.algorithm.support.BubbleSort; iu**`WjI\
import org.rut.util.algorithm.support.HeapSort; gh`m*@
import org.rut.util.algorithm.support.ImprovedMergeSort; )%rg?lI
import org.rut.util.algorithm.support.ImprovedQuickSort; G;> _<22
import org.rut.util.algorithm.support.InsertSort; 4tg<iH{
import org.rut.util.algorithm.support.MergeSort; XxHx:mi
import org.rut.util.algorithm.support.QuickSort; w6`9fX6{h
import org.rut.util.algorithm.support.SelectionSort; ,F&g5'
import org.rut.util.algorithm.support.ShellSort; tg^sCxz9]
%0#1t 5g
/** gOgps:
* @author treeroot *5tO0_L
* @since 2006-2-2 \txbhWN
* @version 1.0 %h1N3\y9i(
*/ yx V:!gl
public class SortUtil { YV=QF J'
public final static int INSERT = 1; 2|\A7.
public final static int BUBBLE = 2; *5bLe'^\|K
public final static int SELECTION = 3; Y_`-9'&
public final static int SHELL = 4; !=;XBd-
public final static int QUICK = 5; aA7=q=
public final static int IMPROVED_QUICK = 6; R.7:3h
public final static int MERGE = 7; Vcd.mE(t%
public final static int IMPROVED_MERGE = 8; $/Aj1j`"9+
public final static int HEAP = 9; AM=z`0so
IwGqf.!.>
public static void sort(int[] data) { NM)k/?fA
sort(data, IMPROVED_QUICK); **69rN
} {M,,npl
private static String[] name={ TW !&p"Us+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (&$VxuJ+6y
}; !lo/xQ<
}b1cLchl
private static Sort[] impl=new Sort[]{ CJ}5T]WZ
new InsertSort(), :JlP[I
new BubbleSort(), 6TP7b|
new SelectionSort(), 4Llo`K4
new ShellSort(), lKk/p^:
new QuickSort(), Q)"A-"y
new ImprovedQuickSort(), &.TTJsKG h
new MergeSort(), U%0Ty|$Y
new ImprovedMergeSort(), gGfoO[B
new HeapSort() 8Sz})UZ
}; Z{?G.L*/
s3Cc;#
public static String toString(int algorithm){ JTi!Xu5Jq
return name[algorithm-1]; 5zON}"EC
} 8p[)MiC5W^
Vh>Z,()>>@
public static void sort(int[] data, int algorithm) { p~LrPWHSTP
impl[algorithm-1].sort(data); )O:0]=#))
} 26CS6(sn
@{Gncy|
public static interface Sort { E7-@&=]v
public void sort(int[] data); \"hJCP?,
} A!^q J#
&^4++
public static void swap(int[] data, int i, int j) { z3?o|A}/W
int temp = data; @k&qb!Qah
data = data[j]; vq34/c^
data[j] = temp; =B.F;40
} j65<8svl
} I%urz!CNE*