[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; LsR<r1KDJ
} Gr({30"8
int i1=l; Kj0)/Fjl+
int i2=mid+1; 3n2^;b/]
for(int cur=l;cur<=r;cur++){ =o@}~G&HA
if(i1==mid+1) 8mr fs%_
data[cur]=temp[i2++]; L'y0$
else if(i2>r) <@7j37,R7V
data[cur]=temp[i1++]; 88u[s@
else if(temp[i1] data[cur]=temp[i1++]; 6UIS4_
else $Y/z+ea
data[cur]=temp[i2++]; (F'~K,0
} $(&uaDYv
} ~Dg:siw
@Hj]yb5
} xEG:KSH
Xp;'Wa"@
改进后的归并排序: 0Cc3NNdz
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package org.rut.util.algorithm.support; hbXmIst
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import org.rut.util.algorithm.SortUtil; 41R~.?
Vb 36R_u
/** Xk:x=4u&
* @author treeroot w[2E:Nj
* @since 2006-2-2 P'$2%P$8:~
* @version 1.0 $zz4A~
*/ Jn(|.eT|
public class ImprovedMergeSort implements SortUtil.Sort { `~axOp9N
E:}s6l
private static final int THRESHOLD = 10; u}'m7|)8
xfUV'=~(
/* ,9OER!$y
* (non-Javadoc) axG%@5
* ml~)7J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _576Qa'rm
*/ 6/a%%1c1
public void sort(int[] data) { }lk9|U#6*`
int[] temp=new int[data.length]; '<"%>-^Gn
mergeSort(data,temp,0,data.length-1); $y)tcVc
} `[=/f=Q}
!ggHLZRlz
private void mergeSort(int[] data, int[] temp, int l, int r) { 7x*L 1>[`'
int i, j, k; lfoPFJ Z
int mid = (l + r) / 2; @&h_+|:-
if (l == r) %*L8W*V
return; r*7J#M /
if ((mid - l) >= THRESHOLD) .j!:Hp(z}
mergeSort(data, temp, l, mid); AfW:'>2
else X/!Y mV!
insertSort(data, l, mid - l + 1); ZA4sEVHW
if ((r - mid) > THRESHOLD) &WbHM)_n
mergeSort(data, temp, mid + 1, r); ZB}zT9JaE
else iA2TvP#
insertSort(data, mid + 1, r - mid); C-2#-{<
\a:-xwUu<
for (i = l; i <= mid; i++) { :2L-Nf
temp = data; \n0Gr\:
} "jq F
for (j = 1; j <= r - mid; j++) { o`jVd,aj
temp[r - j + 1] = data[j + mid]; M4XU*piz
} gA+@p'XnR
int a = temp[l]; pr"q-S>E
int b = temp[r]; b<g9L4s
for (i = l, j = r, k = l; k <= r; k++) { ;;17 #T2
if (a < b) { Nrp1`qY
data[k] = temp[i++]; X{5(i3?S
a = temp; 9&4z4@on
} else { p6{8t}
data[k] = temp[j--]; 0bIhP,4&
b = temp[j]; ~<_PjV
} j|WN!!7
} k5Df97\s
} gDsb~>rb|
]\%u9,b%!
/** A3e83g~L
* @param data \N]2V(v
* @param l n ^C"v6X
* @param i lGN{1djT
*/ GA)t!Xg^
private void insertSort(int[] data, int start, int len) { l:VcV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >^KO5N-:4
} K<w$
} TqXB2`7Ri
} #ruL+-8!<
} zC\L-i>G
-6>T0-
堆排序： &Ukh
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package org.rut.util.algorithm.support; #ANbhHG
h>'Mh;+
import org.rut.util.algorithm.SortUtil; KP]{=~(
HO =\
/** T|Fl$is
* @author treeroot 0)-yLfTn
* @since 2006-2-2 3,-xk!W$L
* @version 1.0 [E|%
*/ Bgj^n{9x
public class HeapSort implements SortUtil.Sort{ .~dNzonq
s8 0$
/* (non-Javadoc) p!3!&{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <2{-ey]
*/ %Y//}
public void sort(int[] data) { dBMr%6tz
MaxHeap h=new MaxHeap(); .+ g8zbD4
h.init(data); DF!*S{)
for(int i=0;i h.remove(); w0L+Sj db
System.arraycopy(h.queue,1,data,0,data.length); :NPnwX8w
} RwptFO
5WvtvSO
private static class MaxHeap{ Gg=Y}S7:
%gE*x #
void init(int[] data){ kls 6Dk#
this.queue=new int[data.length+1]; f/NfvLi(AU
for(int i=0;i queue[++size]=data; HTU?hbG(
fixUp(size); +:?"P<'
} a8laPN
} V*w~Sr%
@is!VzE
private int size=0; &;]KntxB
Tweku}D7
private int[] queue; 5ps7)]
OkaNVTB
public int get() { )tW0iFY
return queue[1]; qmx4hs8sh
} 2/m4|
Td/J6Q90
public void remove() { yO`HL'SMo
SortUtil.swap(queue,1,size--); 9#X"m,SB
fixDown(1); \DC0`
} L|H:&|F
file://fixdown 2jiH&'@
private void fixDown(int k) { Qaeg3f3F3
int j; [DzZ:8
while ((j = k << 1) <= size) { 'Wz`P#/
if (j < size %26amp;%26amp; queue[j] j++; nA?Ks!9T
if (queue[k]>queue[j]) file://不用交换 oW \k%Vj
break; |)}&:xA%
SortUtil.swap(queue,j,k); 3BzC'nplm
k = j; ?6T\uzL +%
} J70r`
} }a?(}{z-
private void fixUp(int k) { 'NYW`,
while (k > 1) { FZ~^cK9g:
int j = k >> 1; ]]^eIjg>a6
if (queue[j]>queue[k]) Q^!x8oUF
break; eN{ewn#0.
SortUtil.swap(queue,j,k); lzDA0MPI:
k = j; r(6$.zx
} h1AZ+9
} B9h'}460H
_ ,~D]JYE
} %;MM+xVVX
:.bBV]6q
} RR9G$}WS(
.:/[%q{k
SortUtil： I92orr1
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package org.rut.util.algorithm; fIwG9cR
(R|Ftjs .
import org.rut.util.algorithm.support.BubbleSort; p%ZOLoc)Y
import org.rut.util.algorithm.support.HeapSort; M>_ U9g
import org.rut.util.algorithm.support.ImprovedMergeSort; J-d>#'Wb|
import org.rut.util.algorithm.support.ImprovedQuickSort; wx[Y2lUh6
import org.rut.util.algorithm.support.InsertSort; NPjNkpWm&=
import org.rut.util.algorithm.support.MergeSort; 8RaRXnJ
import org.rut.util.algorithm.support.QuickSort; ;U<}2M!g
import org.rut.util.algorithm.support.SelectionSort; X 3q2XU
import org.rut.util.algorithm.support.ShellSort; oj%(@6L
O3~7
/** o7sIpE9
* @author treeroot s)9d\{
* @since 2006-2-2 =s/UF_JN
* @version 1.0 h"ZR`?h
*/ uG,*m'x']
public class SortUtil { h}&1 7M
public final static int INSERT = 1; nv'YtmR
public final static int BUBBLE = 2; S\<nCkE^
public final static int SELECTION = 3; :TkR]bhm
public final static int SHELL = 4; ~.&PQE$DF
public final static int QUICK = 5; GMOnp$@H^s
public final static int IMPROVED_QUICK = 6; #,B+&SK{
public final static int MERGE = 7; `PS^o#
public final static int IMPROVED_MERGE = 8; BBDt^$
public final static int HEAP = 9; 88g|(k/
5-2#H?:U
public static void sort(int[] data) { x.kIzI5
sort(data, IMPROVED_QUICK); kG>m(n
} G/4~_\YMq
private static String[] name={ Vqp3'=No
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G3${\'<
}; [Ufx=BPx3
+[Bl@RHe^
private static Sort[] impl=new Sort[]{ ,%d?gi"&
new InsertSort(), S'}pUGDO
new BubbleSort(), #,CK;h9jy!
new SelectionSort(), AR3v,eOs
new ShellSort(), 'LMMo4o3
new QuickSort(), @XQItc<
new ImprovedQuickSort(), 8fWk C<f}
new MergeSort(), hQ\W~3S55
new ImprovedMergeSort(), *IQQsfL)
new HeapSort() uy rS6e0
}; ?.Lq`~T`
p5`={'>-
public static String toString(int algorithm){ #u/5 nm
return name[algorithm-1]; LXS)(-&
} t7 +U!
OJT%?P%@{
public static void sort(int[] data, int algorithm) { Ef\&3TcQ
impl[algorithm-1].sort(data); /Y0oA3am
} `h='FJ/!
bzyy;`;6Q~
public static interface Sort { jX&/ e'B
public void sort(int[] data); 8iUYZF
} FO{?Z%& ;
Ctx{rf_~
public static void swap(int[] data, int i, int j) { .f-s+J&ED
int temp = data; |Ng}ZLBM
data = data[j]; "5@\"L
data[j] = temp; b^R_8x
} X}ft7;Jpy
} ]PQ6 em