[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; v&DI`xn~
} .WA-&b_
int i1=l; cQy2"vtU
int i2=mid+1; [+T.at
for(int cur=l;cur<=r;cur++){ E7j(QOf
if(i1==mid+1) v_+{'F
data[cur]=temp[i2++]; C~,a!qY
else if(i2>r) n8~N$tDU
data[cur]=temp[i1++]; ;K:zmH
else if(temp[i1] data[cur]=temp[i1++]; bnf'4PAt
else ype$ c
data[cur]=temp[i2++]; le|~BG hL
} UZ\u;/}
} :}'=`wa
#L=x%8B
} /M1ob:m
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改进后的归并排序: {f3YsM;]C
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package org.rut.util.algorithm.support; 7zXvnxYE
yj 3cyLXw
import org.rut.util.algorithm.SortUtil; 6tgt>\y
Hq'`8f8N
/** #xsE3Wj-X
* @author treeroot aL+ o /
* @since 2006-2-2 Y2N>HK0
* @version 1.0 k+# %DK
*/ H%qsjB^
public class ImprovedMergeSort implements SortUtil.Sort { 0gW"i&7c
0fb2;&pUa
private static final int THRESHOLD = 10; W#9BNKL
Q|S.R1L^
/* }|0^EWL
* (non-Javadoc) &47i"%
* q<xCb%#Jl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |7'df&CA
*/ 5;tD"/nz
public void sort(int[] data) { x[FJgI'r
int[] temp=new int[data.length]; a#cCpE
mergeSort(data,temp,0,data.length-1); B nFwlw
} BRw .]&/
.5^cb%B*
private void mergeSort(int[] data, int[] temp, int l, int r) { .0zY}`
int i, j, k; =_.l8IYX$%
int mid = (l + r) / 2; ,Xu-@br{
if (l == r) "Gsc;X'id
return; Ep9nsX*
if ((mid - l) >= THRESHOLD) @6Y?\Wx$w
mergeSort(data, temp, l, mid); [+rfAW>p}
else !a{^=#qq&I
insertSort(data, l, mid - l + 1); )tC5Hijq,
if ((r - mid) > THRESHOLD) h{)kQLuzT
mergeSort(data, temp, mid + 1, r); [g7L&`f9
else [>jbhV'
insertSort(data, mid + 1, r - mid); lUOF4U&r
|U:k,YH
for (i = l; i <= mid; i++) { hi_NOx
temp = data; 1T"`vtR
} >nJ\BPx
for (j = 1; j <= r - mid; j++) { AHD=<7Rs
temp[r - j + 1] = data[j + mid]; QmQ=q7
} Eq%}
int a = temp[l]; /Wi[OT14
int b = temp[r]; 3atBX5
for (i = l, j = r, k = l; k <= r; k++) { vNyf64)
if (a < b) { G!Op~p@Jm
data[k] = temp[i++]; |6.l7u?d
a = temp; JB%',J
} else { 3U<cWl@
data[k] = temp[j--]; W,K;6TZhh
b = temp[j]; h=W:^@G
} []\+k31D
} 6/f7<
} 0CZ:Bo[3
p\Q5,eg
/** +KF^Z$I
* @param data .yMEIUm
* @param l pd:WEI ,
* @param i ^7w+l @
*/ Mer/G2#&
private void insertSort(int[] data, int start, int len) { [u =+3b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Jz\%%C
} &yct!YOB2
} S-a]j;U
} YDIG,%uv
} > $O]Eu!
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堆排序： 9>=;FY
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package org.rut.util.algorithm.support; |hKDvH
`}D,5^9]
import org.rut.util.algorithm.SortUtil; B?OFe'*
7LfAaj
/** N+9VYH"*
* @author treeroot lXx=But
* @since 2006-2-2 J-[,KME_^
* @version 1.0 _F4Ii-6
*/ zv|2:4H
public class HeapSort implements SortUtil.Sort{ ADz ^\
6`&a&%,O
/* (non-Javadoc) @#l `iK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [ZNtCnv
*/ A9[ F
public void sort(int[] data) { MOQ6:
MaxHeap h=new MaxHeap(); U2ohHJ``
h.init(data); MH =%-S
for(int i=0;i h.remove(); 1m'k|Ka
System.arraycopy(h.queue,1,data,0,data.length); +xRK5+}9
} aH yx_B
raW>xOivR
private static class MaxHeap{ kq?Ms|h
pD8+ 4;A
void init(int[] data){ ;/bewivNJ
this.queue=new int[data.length+1]; aR[JD2G
for(int i=0;i queue[++size]=data; rbul8(1h
fixUp(size); `oAW7q)~
} 99]R$eT8
} |{&{
e-~N"
private int size=0; 2\R'@L*
!({}(!P .
private int[] queue; &U{#Kt5q
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public int get() { 4%{,] q\p
return queue[1]; k}S :RK
} j SHk{T!J
CYt?,qk-r
public void remove() { ?(xnSW@r
SortUtil.swap(queue,1,size--); R%Hi+#/dr-
fixDown(1); :Oy%a'w
} x!hh"x
file://fixdown Dxtp2wu%t
private void fixDown(int k) { )Fc%+TpKi
int j; ]yV!
while ((j = k << 1) <= size) { ''|W9!
if (j < size %26amp;%26amp; queue[j] j++; 6S},(=
if (queue[k]>queue[j]) file://不用交换 .Q<>-3\K
break; cv8L-Z>x.=
SortUtil.swap(queue,j,k); G%BjhpL
k = j; -6Z\qxKqZ
} 5b5x!do
} f0!))/rSD
private void fixUp(int k) { 4d"r^y'
while (k > 1) { f}6s Q5
int j = k >> 1; p}&#jE
if (queue[j]>queue[k]) {M3qLf~z#C
break; qjc8fP2
SortUtil.swap(queue,j,k); yZAS#ko}}
k = j; ht|z<XJ
} mD/9J5:
} ~W*FCG#E
,y1PbA0m
} ) g0%{dfJ
0mpX)S
} N%kt3vmQ_
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SortUtil： phQUD
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package org.rut.util.algorithm; uyO/55;HO
_> f`!PlB|
import org.rut.util.algorithm.support.BubbleSort; Moy <@+
import org.rut.util.algorithm.support.HeapSort; 1Rq,a
import org.rut.util.algorithm.support.ImprovedMergeSort; #r$cyV!k
import org.rut.util.algorithm.support.ImprovedQuickSort; i6R~`0>Q
import org.rut.util.algorithm.support.InsertSort; Q`~jw>x
import org.rut.util.algorithm.support.MergeSort; %}[i'rT>
import org.rut.util.algorithm.support.QuickSort; \j+1V1t9
import org.rut.util.algorithm.support.SelectionSort; XYjV.j\
import org.rut.util.algorithm.support.ShellSort; tG:25T0
6O|@xvg
/** i% w3/m
* @author treeroot XywE1}3
* @since 2006-2-2 k@\ iGqo
* @version 1.0 hmvfw:Nq4
*/ .@2m07*1
public class SortUtil { Ua<5U5
public final static int INSERT = 1; d.3E[AJa(
public final static int BUBBLE = 2; \"qY"V
public final static int SELECTION = 3; ]-PH^H
public final static int SHELL = 4; <x@}01~
public final static int QUICK = 5; " f <Z=c
public final static int IMPROVED_QUICK = 6; k;2GEa]w
public final static int MERGE = 7; |^0XYBxQ
public final static int IMPROVED_MERGE = 8; 6TYY UM"&
public final static int HEAP = 9; _?<|{O
0+iu(VbF
public static void sort(int[] data) { uya.sF0]9B
sort(data, IMPROVED_QUICK); qUh2hz:
} 2!0c4a^z
private static String[] name={ BD68$y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?Fi=P#
}; 1cxrH+N
2gc/3*F8
private static Sort[] impl=new Sort[]{ E4xj?m^(y=
new InsertSort(), U}&2k
new BubbleSort(), =V-A@_^!c
new SelectionSort(), LyZ.l*h%=m
new ShellSort(), t,,k
new QuickSort(), $RYa6"`
new ImprovedQuickSort(), 8u"!dq
new MergeSort(), (^s>m,h
new ImprovedMergeSort(), 8?J&`e/
new HeapSort() Hx#;Z
}; D'7SAFOM
&]8P1{
public static String toString(int algorithm){ 3wOZ4<B
return name[algorithm-1]; nKS7Q1+
} qo p^;~
>CrA;\l
public static void sort(int[] data, int algorithm) { XR+Y=R
impl[algorithm-1].sort(data); P=7zs;k
} 2-7IJ\
}B8IBveu
public static interface Sort { uZM{BgXXD
public void sort(int[] data); ~T9/#-e>BF
} Kh,V.+7k
wN`jE0 {
public static void swap(int[] data, int i, int j) { Ai:BEPKe
int temp = data; Y'yH;Mz
data = data[j]; j:5=s%S
data[j] = temp; 9XPo3;
} Px$/ _`H
} 5i>$]*o