[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; zD3mX<sw
} UX]L;kI
int i1=l; +:3*
int i2=mid+1; gIA@l`"
for(int cur=l;cur<=r;cur++){ sBV4)xM
if(i1==mid+1) 1Z{ZV.!
data[cur]=temp[i2++]; lC=~$c:
else if(i2>r) ;(}V"i7Hu
data[cur]=temp[i1++]; 5wUUx#
else if(temp[i1] data[cur]=temp[i1++]; ?8W("W
else g#]wLm#
data[cur]=temp[i2++]; @y31NH(
} waKT{5k
} $ "Bh]-
pHoEa7:
} (|wz7AY2
LHJ":^
改进后的归并排序: ~Y.tz`2D
=V"(AuCVE
package org.rut.util.algorithm.support; 'Wa,OFd\8
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import org.rut.util.algorithm.SortUtil; C{2xHd/*
m!U9m
/** oA1a/[#
* @author treeroot inlk++Og
* @since 2006-2-2 "(qw-kil
* @version 1.0 fABe
*/ fr!Pj(Q1
public class ImprovedMergeSort implements SortUtil.Sort { Py{<bd
(MHAJ]Rx
private static final int THRESHOLD = 10; d6i6hcQE
f{0F|w<gf
/* GUQ{r!S
* (non-Javadoc) 4Z|vnj)Z
* _{jjgQJ5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "`asFg
*/ $`Ix:gi
public void sort(int[] data) { fL]Pztsk+
int[] temp=new int[data.length]; l|5fE1K9U
mergeSort(data,temp,0,data.length-1); I5h[%T
} [%&ZPJT%i
5JhdVnT_
private void mergeSort(int[] data, int[] temp, int l, int r) { :NJ(r(QG>
int i, j, k; US
int mid = (l + r) / 2; hQNe;R5
if (l == r) .G o{1[
return; F7")]q3I~
if ((mid - l) >= THRESHOLD) ;O<9|?
mergeSort(data, temp, l, mid); r < cVp^
else Y?534l)j
insertSort(data, l, mid - l + 1); W[+|}
if ((r - mid) > THRESHOLD) V(Yxh+KU
mergeSort(data, temp, mid + 1, r); %7g:}O$
else 1wW)tNKIF
insertSort(data, mid + 1, r - mid); [=%TnT+^9
_20#2i&
for (i = l; i <= mid; i++) { i_][PTH
temp = data; w{k)XY40sW
} dJ?XPo"Cm=
for (j = 1; j <= r - mid; j++) { y<C<_2
temp[r - j + 1] = data[j + mid]; cQ:"-!ff
} gT/@dVV
int a = temp[l]; n[YEOkiG
int b = temp[r]; yz2Ci0Dwy
for (i = l, j = r, k = l; k <= r; k++) { :iR \%
if (a < b) { !gnj]k&/c
data[k] = temp[i++]; o->\vlbD
a = temp; $Ci0I+5w
} else { Zf7&._y.
data[k] = temp[j--]; hp"L8w
b = temp[j]; ^t7x84jhL
} *._|-L
} Dup;e&9g
} .d/:30Y
PQ|69*2G
/** s_.]4bl.8
* @param data a?YCn!
* @param l V<HU6w
* @param i 5PcJZi^.l
*/ tRpEF2
private void insertSort(int[] data, int start, int len) { %zU`XVNN+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =uDgzdDyE
} -*2Mf Mh
} &_5tqh
} 1c+]gIe
} {YUIMd!Y
!EQ@#qW/
堆排序： 3sCFHn#c
4em;+ >D6
package org.rut.util.algorithm.support; r6'UUu
S(aZ4{a@
import org.rut.util.algorithm.SortUtil; t:LcNlN|
VOsqJJ3
/** p$7#}s
* @author treeroot 9z?oB&5
* @since 2006-2-2 q %A?V_
* @version 1.0 1{_A:<VBl
*/ HyiFy7j
public class HeapSort implements SortUtil.Sort{ #}^-C&~
6mH/ m&
/* (non-Javadoc) 4x%(9_8{-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [#YE^[*qK
*/ H&b3{yOa
public void sort(int[] data) { kqG0%WtQ
MaxHeap h=new MaxHeap(); .yENM[-bQ
h.init(data); G#Ou[*O'
for(int i=0;i h.remove(); #GaxZ
System.arraycopy(h.queue,1,data,0,data.length); LflFe@2
} j'i0*"x
ZtVAEIZ)
private static class MaxHeap{ y$hp@m'@C
midsnG+jnf
void init(int[] data){ fx8EB8A7K7
this.queue=new int[data.length+1]; QCPID:
for(int i=0;i queue[++size]=data; >s3gqSDR
fixUp(size); ENh!N4vbO
} @xsCXCRWVV
} Z['\61
M\b")Tu{0
private int size=0; PN+G:Qv
hl&-\dc+
private int[] queue; \RQ='/H*
}Vu\(~
public int get() { 6I_Hd>4
return queue[1]; N?dvuB
} ^BZkHAp
bU 63X={
public void remove() { 0^'B3$>
SortUtil.swap(queue,1,size--); 0i[zup
fixDown(1); R6 XuA(5
} =rPrPb
file://fixdown Kt>X[o3m,
private void fixDown(int k) { @&1Wyp
int j; 9@$,oM=
while ((j = k << 1) <= size) { ^0W(hA
if (j < size %26amp;%26amp; queue[j] j++; 52zGJ I*
if (queue[k]>queue[j]) file://不用交换 zm9TvoC%}
break; CBf7]n0H
SortUtil.swap(queue,j,k); 04!(okubyp
k = j; 0e["]Tlnm
} l6[lJ0Y
} \F,DA"K_
private void fixUp(int k) { }W)=@t
while (k > 1) { Q Z8QQ`*S
int j = k >> 1; 6)]f6p&e
if (queue[j]>queue[k]) gJ2 H=#M
break; (kTXP_
SortUtil.swap(queue,j,k); 64Gi8|P
k = j; PU9`<3z5
} j*T]HaM
} U3vEdw<lV
YEjY8]t
} 5=?i;P
AV&yoag1
} jn9 ShF
ZA#y)z8!E
SortUtil： cd;NpN
h$C@j~
package org.rut.util.algorithm; :&'{mJW*{t
u"$a>S_
import org.rut.util.algorithm.support.BubbleSort; 0BkV/v1Uc
import org.rut.util.algorithm.support.HeapSort; PM$Ee #62R
import org.rut.util.algorithm.support.ImprovedMergeSort; &ntBU]<q
import org.rut.util.algorithm.support.ImprovedQuickSort; \o3"~\|6C
import org.rut.util.algorithm.support.InsertSort; BX;5wKfA
import org.rut.util.algorithm.support.MergeSort; 2^exL h
import org.rut.util.algorithm.support.QuickSort; &A!KJ.
import org.rut.util.algorithm.support.SelectionSort; BH0!6Oq
import org.rut.util.algorithm.support.ShellSort; jj\[7 O*
{gf>*
/** e{G_GycH
* @author treeroot rqCa 2
* @since 2006-2-2 wCZO9sU:6=
* @version 1.0 QL"gWr`R
*/ D_|B2gdZY
public class SortUtil { d&:H&o)T!
public final static int INSERT = 1; >Pe:I
public final static int BUBBLE = 2; P#GD?FUc
public final static int SELECTION = 3; AZFWuPJo
public final static int SHELL = 4; |U[y_Y\a
public final static int QUICK = 5; #_Ea[q7v
public final static int IMPROVED_QUICK = 6; ^o<:;{
public final static int MERGE = 7; 0rMqWP
public final static int IMPROVED_MERGE = 8; .")b?#K
public final static int HEAP = 9; PB~_I=
&yH#s 8^8
public static void sort(int[] data) { nR5bs;gk"
sort(data, IMPROVED_QUICK); ]>:^d%n,}
} ;np_%?is
private static String[] name={ i8V0Ty4~N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `rWB`q|i<
}; CKARg8o
6i@ub%qq
private static Sort[] impl=new Sort[]{ 4 9w=kzo
new InsertSort(), YaFcz$GE_
new BubbleSort(), -oBI+v&
new SelectionSort(), AfWl6a?T8:
new ShellSort(), rFag@Z"["
new QuickSort(), #!!AbuhzK{
new ImprovedQuickSort(), >.dHt\
new MergeSort(), 4E"d/
new ImprovedMergeSort(), Y4~vC[$x'
new HeapSort() 3\!F\tqD \
}; oo'w-\2]p
#-x@"+z
public static String toString(int algorithm){ KvFR8s
return name[algorithm-1]; V> a*3D
} 5]"BRn1*
5 Rz/Ri\c=
public static void sort(int[] data, int algorithm) { <A~GW 'HB
impl[algorithm-1].sort(data); ZL91m`r
} ,zgNE*{Y"4
uIP iM8(
public static interface Sort { =Q?f96T
public void sort(int[] data); ;bHfn-X
} oXc/#{NC
j8HOc(
public static void swap(int[] data, int i, int j) { [%.18FWI
int temp = data; Gj6. Iv
data = data[j]; 2:J,2=%
data[j] = temp; DA <ynBQ
} Jirct,k
} Z*bC#s?