[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; D*0[7:NSO
} TF_wT28AU2
int i1=l; "zE>+zRl
int i2=mid+1; xB:]{9r
for(int cur=l;cur<=r;cur++){ pf% yEz
if(i1==mid+1) /qaWUUf
data[cur]=temp[i2++]; /M2U7^9``"
else if(i2>r) 3R>"X c
data[cur]=temp[i1++]; /0m0""
else if(temp[i1] data[cur]=temp[i1++]; aoUz_7
else 3kzO VZ
data[cur]=temp[i2++]; .RW&=1D6
} z"%{SI^
} zu_bno!
)gVz?-u+D
} GAP,$xAaW
mE"(d*fe'
改进后的归并排序: :@@aIFRv
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package org.rut.util.algorithm.support; D]=V6l=
b9R0"w!ml
import org.rut.util.algorithm.SortUtil; PRal>s&f
A<}nXHs-
/** YQ|o0>
* @author treeroot R :*1Y\o(
* @since 2006-2-2 6c6w w"
* @version 1.0 {[pzqzL6
*/ ;: xE'-
public class ImprovedMergeSort implements SortUtil.Sort { kxCN0e#_
:@4+}
private static final int THRESHOLD = 10; +aQM %~
~F"w
/* kD46Le++B
* (non-Javadoc) bn:74,GeyK
* V}h <,E9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5fq4[a
*/ (M#m BS
public void sort(int[] data) { P"{yV?CNg
int[] temp=new int[data.length]; =d BK,/
mergeSort(data,temp,0,data.length-1); CH$K_\
} gq~K(Q<O<
qTz5P
private void mergeSort(int[] data, int[] temp, int l, int r) { SFjRSMi
int i, j, k; f"-3'kqo
int mid = (l + r) / 2; GJ\bZ"vDo
if (l == r) *+TO%{4
return; h$]nfHi_Q
if ((mid - l) >= THRESHOLD) 14`S9SL{V
mergeSort(data, temp, l, mid); eRm*+l|?
else /H*[~b
insertSort(data, l, mid - l + 1); 0nPg`@e.
if ((r - mid) > THRESHOLD) 2WS Wfh
mergeSort(data, temp, mid + 1, r); yu}T><Wst
else ,&iEn}xG7i
insertSort(data, mid + 1, r - mid); /b]+RXvxj
#y8Esik
for (i = l; i <= mid; i++) { |JiN; O+K
temp = data; ,f~)CXNT?
} kl|m @Nxp
for (j = 1; j <= r - mid; j++) { BPSie0
temp[r - j + 1] = data[j + mid]; +3J5j+
} " 1h~P,
int a = temp[l]; 5Mp$u756
int b = temp[r]; 06 an(&a9
for (i = l, j = r, k = l; k <= r; k++) { Y,m=&U
if (a < b) { m~tv{#Y
data[k] = temp[i++]; 79uAsI2-Y
a = temp; ~zoZ{YqP
} else { S;"$02]
data[k] = temp[j--]; _xM}*_<VP
b = temp[j]; Lh-+i
} Tdxc%'l
} )`#SMLMy~
} PKZMuEEy,
-n:;/ere7-
/** g*WY kv
* @param data *|,ye5"
* @param l %<>|cO
* @param i F6ZL{2$k@
*/ IK,aA;d
private void insertSort(int[] data, int start, int len) { b?-KC\}v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NftR2
} %~\I*v04
} xf;Tk
} C;YtMY:
} qgxGq(6K
:n OCs
堆排序： 7WHq'R{@
L;U?s2&Y
package org.rut.util.algorithm.support; $*j)ey>
t; @T~%
import org.rut.util.algorithm.SortUtil; Dc3bG@K*G
@Ll^ze&HI
/** .X"\ Mg
* @author treeroot ^@$T>SB1
* @since 2006-2-2 |H%,>r`9S
* @version 1.0 VO<P9g$UD
*/ -+Z&O?pSH
public class HeapSort implements SortUtil.Sort{ loD:4e1
SQ`KR'E
/* (non-Javadoc) J@IF='{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^x_+&
*/ Bam 4%G5
public void sort(int[] data) { } DjbVYH
MaxHeap h=new MaxHeap(); .G>6_n3
h.init(data); 8Ib5
for(int i=0;i h.remove(); Sr-!-eC
System.arraycopy(h.queue,1,data,0,data.length); T9AFL;1
} Sj;:*jk!h
qSQsY:]j0
private static class MaxHeap{ t x1(6V&l;
zLjQ,Lp.I
void init(int[] data){ H,)2Ou-Wn
this.queue=new int[data.length+1]; uXdR-@80*
for(int i=0;i queue[++size]=data; (X|lK.W y
fixUp(size); npcL<$<6X
} `o%Ua0x2
} 6z5?9I4[
~./M5P!\
private int size=0; N lB%Qu
b|U3\Fmc
private int[] queue; b(_PV#@$
5xc-MkIRL
public int get() { `IK3e9QpcA
return queue[1]; R-5e9vyS
} ?r R, h{~
H?j}!JzAC
public void remove() { -l$-\(,M`#
SortUtil.swap(queue,1,size--); I_'0!@Nn7
fixDown(1); jxZd =%7Q
} }#E~XlX^
file://fixdown %loe8yt
private void fixDown(int k) { 6}q# c
int j; Jek)`D
while ((j = k << 1) <= size) { @W!cC#u
if (j < size %26amp;%26amp; queue[j] j++; D?P1\<A~
if (queue[k]>queue[j]) file://不用交换 8yCQWDE}
break; ,IG?(CK|
SortUtil.swap(queue,j,k); ;%Zn)etu
k = j; "3VMjF\
} 1{bsh?zd
} lHSuT2)x;
private void fixUp(int k) { fg8U*7
while (k > 1) { #VM-\02o
int j = k >> 1; %I;iP|/
if (queue[j]>queue[k]) +7bV
break; A@OSh6/{h
SortUtil.swap(queue,j,k); M-NY&@Nj
k = j; Z#|IMmT;*=
} {1]Of'x'
} ZTP&*+d
8(0q,7)y
} X" ;ly0Mb
44_CT?t<
} .p(~/MnO
=j!Ruy1
SortUtil： ahm@ +/2
2~SjRIpUw
package org.rut.util.algorithm; j!QP>AM|`
vq*)2.
import org.rut.util.algorithm.support.BubbleSort; }_o!fV
import org.rut.util.algorithm.support.HeapSort; `K\(I#z
import org.rut.util.algorithm.support.ImprovedMergeSort; 9-N*Jhg
import org.rut.util.algorithm.support.ImprovedQuickSort; yX;v
import org.rut.util.algorithm.support.InsertSort; s~Od(,K
import org.rut.util.algorithm.support.MergeSort; Gv zw=~8
import org.rut.util.algorithm.support.QuickSort; :1\QM'O
import org.rut.util.algorithm.support.SelectionSort; WjvD C"
import org.rut.util.algorithm.support.ShellSort; gDjs:]/YR
olO&7jh7|
/** 0YVkq?1x9
* @author treeroot xt"GO b
* @since 2006-2-2 3re|=_ Hy
* @version 1.0 ZCS{D
*/ 6s|4'!
public class SortUtil { tL~?)2uEN
public final static int INSERT = 1; JOJ?.H&su
public final static int BUBBLE = 2; mH*6Q>
public final static int SELECTION = 3; t&=]>blIs
public final static int SHELL = 4; D$ +"n
public final static int QUICK = 5; Xm}~u?$3
public final static int IMPROVED_QUICK = 6; CJu3h&Rp
public final static int MERGE = 7; f,}]h~w\
public final static int IMPROVED_MERGE = 8; eb>YvC
public final static int HEAP = 9; Qs.g%
-l`1j6
public static void sort(int[] data) { ~wsDg[
sort(data, IMPROVED_QUICK); P2;I0 !
} 0qrsf!
private static String[] name={ *PJg~F%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 79 ZBVe(}
}; -O-qEQd
xl~%hwBd
private static Sort[] impl=new Sort[]{ S<V__Sv
new InsertSort(), PME ?{%&
new BubbleSort(), 0cm+:
new SelectionSort(), \#; -C<[b
new ShellSort(), (S[" ak
new QuickSort(), jTJ]: EN
new ImprovedQuickSort(), Z;#Ei.7p|
new MergeSort(), -6KGQc}U
new ImprovedMergeSort(), ki^c)Tqn
new HeapSort() ymLhSF][
}; :5`BhFAd
?E?dg#yk
public static String toString(int algorithm){ $G5;y>
return name[algorithm-1]; yprf `D>
} tj_+0J$sw:
&[hq !v
public static void sort(int[] data, int algorithm) { 1>SCY_Cv
impl[algorithm-1].sort(data); 6n.W5 1g(s
} *M_Gu{xc
1MCHwX3/
public static interface Sort { . 787+J?
public void sort(int[] data); AZCbUkq
} @]H:=Q'gj
gB\KD{E
public static void swap(int[] data, int i, int j) { yjbqby7
int temp = data; 4S]`S\w
data = data[j]; {{?[b^
data[j] = temp; @,63%
} b1}P3W
} <|s9@;(I