[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; !GL kAV
} ER4j=O#
int i1=l; B^yA+&3HI
int i2=mid+1; fRT4,;
for(int cur=l;cur<=r;cur++){ y?4%eD
if(i1==mid+1) 1GA$nFBVC
data[cur]=temp[i2++]; }k7t#O
else if(i2>r) B!X;T9^d
data[cur]=temp[i1++]; 1NI%J B
else if(temp[i1] data[cur]=temp[i1++]; y)%CNH)*x
else . v L4@_
data[cur]=temp[i2++]; {=)g?!zC
} [n!5!/g>j
} ^_C]?D?
LH_rc
} =FfxHo1k
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改进后的归并排序: R3,O;9i
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package org.rut.util.algorithm.support; "z/)> ?Wn
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import org.rut.util.algorithm.SortUtil; 8a}et8df:
~n<U8cm O
/** dd&n>A3O=
* @author treeroot 7>sNjOt@M
* @since 2006-2-2 |MEu"pY)
* @version 1.0 <[W41{
*/ g(`m#&P>G
public class ImprovedMergeSort implements SortUtil.Sort { |?=a84n1l
:\sz`p?EC
private static final int THRESHOLD = 10; yR|Beno
T|fmO<e*n
/* piv/QP-X
* (non-Javadoc) 7%x 3o#&
* Q(gc(bJV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n9p_D
*/ byrK``f
public void sort(int[] data) { ~8#Ku,vEy
int[] temp=new int[data.length]; \f6@B:?y
mergeSort(data,temp,0,data.length-1); ^S]-7>Yyr
} |yT-N3H@
njoU0f1`
private void mergeSort(int[] data, int[] temp, int l, int r) { vy&< O
int i, j, k; '1u!@=.\G
int mid = (l + r) / 2; U.mVz,k3
if (l == r) dd=';%?
return; }/cMG/%
if ((mid - l) >= THRESHOLD) qC;1ND
mergeSort(data, temp, l, mid); JxlU=7cF
else 7=e!k-G
insertSort(data, l, mid - l + 1); ;3 |Z}P
if ((r - mid) > THRESHOLD) eq<giHJM
mergeSort(data, temp, mid + 1, r); ZBX,4kxK7
else sb^%eUU])
insertSort(data, mid + 1, r - mid); !rwe|"8m?u
aOWfu^&H:
for (i = l; i <= mid; i++) { djGzJLH
temp = data; 4PsJs<u
} ]`S35b
for (j = 1; j <= r - mid; j++) { t^Hte^#S
temp[r - j + 1] = data[j + mid]; &t0toEj
} PX%Y$`
int a = temp[l]; `EjPy>kM
int b = temp[r]; 6L\?+=X
for (i = l, j = r, k = l; k <= r; k++) { gOnVN6
if (a < b) { (w+dB8)X
data[k] = temp[i++]; N9s ,..
a = temp; gr%!<2w
} else { h4\j=Np
data[k] = temp[j--]; XX@@tzN
b = temp[j]; p~h)@
} | D?lF
} WOgPhJ
} >AsrPU[
vXA+4 ?ZG
/** OB&lq.r
* @param data '=^$;3Z
* @param l K}(0H[P
* @param i 4Em$L]7
*/ FN)vFQ#J
private void insertSort(int[] data, int start, int len) { <+%#xi/_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /N'|Vs,X
} \@ jYY~
} v]tNJ=aI
} :vqfWK6mv
} fNkN
T9,T'y>BD
堆排序： ~SWR|[
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package org.rut.util.algorithm.support; lN<,<'&^.
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import org.rut.util.algorithm.SortUtil; w N-np3k
"AAzBWd/
/** q!5 *)nw"
* @author treeroot Z6Owxqfht
* @since 2006-2-2 g'F{;Ur
* @version 1.0 W%)uKQha
*/ +}u{{
public class HeapSort implements SortUtil.Sort{ Wg3\hv29
_ zh>q4M
/* (non-Javadoc) <Fc @T4Q,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h)vRvfcmY
*/ 2?)bpp$WZ
public void sort(int[] data) { +Je(]b@
MaxHeap h=new MaxHeap(); ~|7jz;$V
h.init(data); w,'"2^Cwy
for(int i=0;i h.remove(); 3O W)%
System.arraycopy(h.queue,1,data,0,data.length); vXio /m
} WrS|$: 0
cjd Z.jR2
private static class MaxHeap{ /%fa_+,|-
;T6x$e
void init(int[] data){ Bx>)i8P7i0
this.queue=new int[data.length+1]; @y#QHJ.j
for(int i=0;i queue[++size]=data; :Y{aa1
fixUp(size); Xg](V.B6
} s /?&H-
} n$ri:~s
RuW62QSq
private int size=0; J:{$\m'
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private int[] queue; Zv`j+b
#\Q{?F!4
public int get() { b0~AN#Es
return queue[1]; t:|+U:! >
} }Z|uLXaz
sw(dd01a 7
public void remove() { ~"Pu6-\VT
SortUtil.swap(queue,1,size--); E%f;Z7G
fixDown(1); g' xR$6t
} 0NN{2"M$p
file://fixdown Mbt}G|;8H7
private void fixDown(int k) { :oH~{EQ
int j; A1zqm_X5)P
while ((j = k << 1) <= size) { d" "GG/
if (j < size %26amp;%26amp; queue[j] j++; Whf7J'
if (queue[k]>queue[j]) file://不用交换 NW.<v /?=,
break; 4)o_gm~6c4
SortUtil.swap(queue,j,k); o4)^U t+
k = j; {L!w/IeX
} +&W%]KEh
} H?dmNwkPY
private void fixUp(int k) { hLVS}HE2
while (k > 1) { \LFRu
int j = k >> 1; {\OIowa
if (queue[j]>queue[k]) 5aF03+ko
break; 4{:W5eT!/
SortUtil.swap(queue,j,k); k~(j
k = j; =sqhPS<>
} YU89m7cc'
} o@?3i+%}8
Ek [V A\G
} kAbkhZ1^
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} FkdG@7Xf
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SortUtil： \haJe~
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package org.rut.util.algorithm; $B6"fYiDk
Xd_86q8o
import org.rut.util.algorithm.support.BubbleSort; U/ncD F%C
import org.rut.util.algorithm.support.HeapSort; 6]i"lqb
import org.rut.util.algorithm.support.ImprovedMergeSort; E^.y$d~dS
import org.rut.util.algorithm.support.ImprovedQuickSort; 5Rv6+d
import org.rut.util.algorithm.support.InsertSort; IT,TSs/Y
import org.rut.util.algorithm.support.MergeSort; Lm kv.XF
import org.rut.util.algorithm.support.QuickSort; y.AF90Q>)
import org.rut.util.algorithm.support.SelectionSort; YfC1.8
import org.rut.util.algorithm.support.ShellSort; zN(fZT}K5
XE_|H1&j
/** /B$"fxFf
* @author treeroot 8&6h()
* @since 2006-2-2 ,x| 4nk_
* @version 1.0 u,:GJU
*/ Zho d%n3
public class SortUtil { z6)SaSYE
public final static int INSERT = 1; |-N\?N9"
public final static int BUBBLE = 2; Azx4+`!-
public final static int SELECTION = 3; D?w?0b Eu
public final static int SHELL = 4; `}1IQ.3
public final static int QUICK = 5; L\||#w
public final static int IMPROVED_QUICK = 6; l`L}*Q- 5
public final static int MERGE = 7; h+k:G9;sS
public final static int IMPROVED_MERGE = 8; .Od.lxz"mp
public final static int HEAP = 9; Y`S9mGR#
OO@ (lt
public static void sort(int[] data) { O:fv1
sort(data, IMPROVED_QUICK); m~%\f8w-x
} TIg3'au
private static String[] name={ 8LP L4l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uBLI!N-G
}; X>w(^L*>
a3i4eGT-
private static Sort[] impl=new Sort[]{ U2=l; R{
new InsertSort(), t\nYUL-H
new BubbleSort(), .jRp.U
new SelectionSort(), 2f1WT g)
new ShellSort(), <d,Qi.G4
new QuickSort(), 6[kp#
new ImprovedQuickSort(), .g.v
new MergeSort(), x^kV;^ I
new ImprovedMergeSort(), "nXL7N0
new HeapSort() 7aVQp3<
}; YC#N],#
c&.>SR')
public static String toString(int algorithm){ X cmR/+
return name[algorithm-1]; [*U6L<JI
} MtC\kTW
<rc?EV
public static void sort(int[] data, int algorithm) { <Q'J=;vV
impl[algorithm-1].sort(data); 2xvTijO0
} Jrd:6Z
1BK-uv:
public static interface Sort { Al="ss&2
public void sort(int[] data); R]e?<,"X
} H8+7rM
<zE,T@c
public static void swap(int[] data, int i, int j) { smQ<lwA
int temp = data; 4S>A}rWz
data = data[j]; 0R&$P6
data[j] = temp; )(`I1"1
} k3::5&
} Q?KWiFA}'