[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; +^1HtI|y
} ~^w;`~L
int i1=l; L'`W5B@
int i2=mid+1; aM,>LKNbQ
for(int cur=l;cur<=r;cur++){ GG/~)^VMe
if(i1==mid+1) 0<Vw0%!
data[cur]=temp[i2++]; @{j'Pf'
else if(i2>r) =X2 Ieb
data[cur]=temp[i1++]; (|Y[5O)
else if(temp[i1] data[cur]=temp[i1++]; [^A93F
else {ckA
data[cur]=temp[i2++]; mrS:||,_
} gmJiKuAL5
} TGY^,H>J
]Z&2
} TWK(vEDM
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改进后的归并排序: [mYmrLs6
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package org.rut.util.algorithm.support; .fk!~8b[Q+
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import org.rut.util.algorithm.SortUtil; bu1O<*
MR:Co4(
/** {()8 Wr
* @author treeroot w3a`G|
* @since 2006-2-2 w[qWr@
* @version 1.0 hvnZ 2x.?d
*/ RM|<(kq
public class ImprovedMergeSort implements SortUtil.Sort { >t.2!Z_RQ
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private static final int THRESHOLD = 10; ygW,4Vz7J
Mmq{]q~At
/* Ie`kzssM
* (non-Javadoc) H^Ik FEVs
* =mxmJFA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vq B)PL5)
*/ lBvQ?CJ<y
public void sort(int[] data) { .ZJt
int[] temp=new int[data.length]; nsqc^ K^
mergeSort(data,temp,0,data.length-1); aF1pq
} \/p\QT@mm
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private void mergeSort(int[] data, int[] temp, int l, int r) { 8j. 9Sk/
int i, j, k; hub1rY|No
int mid = (l + r) / 2; nzmv>s&UW
if (l == r) X<9jBj/t
return; 'QFf 7A
if ((mid - l) >= THRESHOLD) ,9^wKS!7$
mergeSort(data, temp, l, mid); P PZxH}J.
else L&+XFntR
insertSort(data, l, mid - l + 1); d}GO(
if ((r - mid) > THRESHOLD) '=EaZ>=
mergeSort(data, temp, mid + 1, r); j)?I]j/
else iqig~fjK~
insertSort(data, mid + 1, r - mid); U{gJn#e/.
]7}2"?J4v
for (i = l; i <= mid; i++) { ]xBQ7Xqf|
temp = data; ^EdY:6NJ=A
} _fz-fG 1
for (j = 1; j <= r - mid; j++) { M$dDExd~
temp[r - j + 1] = data[j + mid]; KGS=(z
} /m%i"kki
int a = temp[l]; kep.+t[
int b = temp[r]; ~v$gk
for (i = l, j = r, k = l; k <= r; k++) { m/r4f279
if (a < b) { Dtl381F J
data[k] = temp[i++]; }A'QXtI/G
a = temp; Sp: `Z1kH
} else { h`F8GNx(
data[k] = temp[j--]; eVL'Ao&Ho
b = temp[j]; M]oO1GM
} 3de<H=H'
} +]*4!4MK6
} WUkx v*
;>{BK,
/** V)V\M6
* @param data Jb Hn/$
* @param l NdZv*
* @param i T52A}vf4
*/ j4$XAq~W
private void insertSort(int[] data, int start, int len) { Zmw'.hL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3#}5dO
} ?u{y[pI6
} ~,Ck
} Ho9 a#9
} O+A/thI%*S
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堆排序： V4ml& D
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package org.rut.util.algorithm.support; 4<CHwIRHY
%|bqL3)a_
import org.rut.util.algorithm.SortUtil; U@x5cw:
D'2&'7-sm\
/** E#X(0(A)
* @author treeroot z@iu$DZ
* @since 2006-2-2 xH!{;i
* @version 1.0 Wg9q_Ql
*/ v>CAA"LH
public class HeapSort implements SortUtil.Sort{ Z%Q[W}iD
6 6WAD$8$
/* (non-Javadoc) Ll\y2oJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RZi]0l_A'
*/ }DjW
public void sort(int[] data) { QL%&b\K
MaxHeap h=new MaxHeap(); &$ZJfHD@
h.init(data); ,E2Tw-%
for(int i=0;i h.remove(); ORHs1/L`j
System.arraycopy(h.queue,1,data,0,data.length); yPL1(i;
} DS0c0lsx
JJ[.K*dO
private static class MaxHeap{ Hz&a~
wK0vKdi
void init(int[] data){ *U|K~dl]K
this.queue=new int[data.length+1]; q'9u8b
for(int i=0;i queue[++size]=data; =Bu>}$BD
fixUp(size); BWV)> -V
} YYwFjA@
} Ugzq;}V#
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private int size=0; PRcW}"m]Qg
%H Pwu &
private int[] queue; ~fbFA?g3
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public int get() { '|V"!R)
return queue[1]; ,\ [R\s
} YMx]i,u'+
f-&4x_5
public void remove() { Q]wM WV
SortUtil.swap(queue,1,size--); &6V[@gmD
fixDown(1); :23w[vt=
} ".Z|zt6C
file://fixdown aGY R:jR$
private void fixDown(int k) { IGqg,OEAp
int j; LldZ"%P
while ((j = k << 1) <= size) { s>hNwb/
if (j < size %26amp;%26amp; queue[j] j++; *\><MXx
if (queue[k]>queue[j]) file://不用交换 8i"v7}
break; _dCdyf
SortUtil.swap(queue,j,k); >qkZn7C
k = j; ,xmmS\
} 5nC#<EE
} |Xz-rgkQ
private void fixUp(int k) { %"kF i
while (k > 1) { w@,Yj#_9cx
int j = k >> 1; IJ >qs8
if (queue[j]>queue[k]) nKpXRuFn\
break; foO/Yc
SortUtil.swap(queue,j,k); %i[G6+-
k = j; d^AXhQjQN-
} \>,[5|GU
} &p|+K XIf
\~u7 k
} K@yLcgr{O2
*l\wl @{
} OI:G~Wg
+P YX.
SortUtil： /,#HGu]q'
H&0dc.n~.
package org.rut.util.algorithm; KWwEK]
}t5-%&gBY0
import org.rut.util.algorithm.support.BubbleSort; ?}p~8{ '
import org.rut.util.algorithm.support.HeapSort; .yK~FzLs
import org.rut.util.algorithm.support.ImprovedMergeSort; 84(NylZ
import org.rut.util.algorithm.support.ImprovedQuickSort; R|4a9G
import org.rut.util.algorithm.support.InsertSort; /Wos{}Z0
import org.rut.util.algorithm.support.MergeSort; %%d3M->C}
import org.rut.util.algorithm.support.QuickSort; #_oN.1u57
import org.rut.util.algorithm.support.SelectionSort; 0m8mHJ<&
import org.rut.util.algorithm.support.ShellSort; t@=*k9
Ed">$S
/** ob=](
* @author treeroot FO[x c;
* @since 2006-2-2 iN\m:m
* @version 1.0 Jc8^m0_
*/ ^!a4!DGVT
public class SortUtil { 2;&K*>g&.
public final static int INSERT = 1; B<^yT@Wc
public final static int BUBBLE = 2; rf@Cz%xDD
public final static int SELECTION = 3; )T2V<3l
public final static int SHELL = 4; Y 1v9sMN,
public final static int QUICK = 5; jd>ug=~x
public final static int IMPROVED_QUICK = 6; oW[];r
public final static int MERGE = 7; ">zK1t5=
public final static int IMPROVED_MERGE = 8; Tnd)4}2p
public final static int HEAP = 9; 2H\}N^;f
8kn> ?
public static void sort(int[] data) { aL?+# j^"
sort(data, IMPROVED_QUICK); /?(\6Z_A
} 47<fg&T
private static String[] name={ 4th*=ku
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >aw`kr
}; 'c]Fhe fb
Ddu1>"p-x
private static Sort[] impl=new Sort[]{ F"|OcKAA}h
new InsertSort(), 0[\sz>@
new BubbleSort(), >]/RlW[
new SelectionSort(), w^BF.Nu
new ShellSort(), ML:Zm~A1U
new QuickSort(), $G UCVxs
new ImprovedQuickSort(), +)J;4B
new MergeSort(), 19#s:nt9
new ImprovedMergeSort(), 1:Sq?=&
new HeapSort() dUvgFOy|P
}; G+5_I"`W
As}3VBd
public static String toString(int algorithm){ ?ZF~U
return name[algorithm-1]; {e35O(Y
} \}Hi\k+h':
>_3P6-L>
public static void sort(int[] data, int algorithm) { FGRdA^`
impl[algorithm-1].sort(data); P]A~:Lj
} :ebu8H9f%
#aHJ|[[(n
public static interface Sort { $V/Hr/0
public void sort(int[] data); i#pBzJ
} qpt},yn)C
T<a/GE/
public static void swap(int[] data, int i, int j) { >IT19(J;A
int temp = data; UR{OrNg*
data = data[j]; [}+h86:y
data[j] = temp; Y| dw>qO
} fo$s9g^<
} `<#Ufi*c