[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; awYnlE/Z1
} rw:z|-r
int i1=l; ylFoYROO
int i2=mid+1; z;T_%?u
for(int cur=l;cur<=r;cur++){ 'mwgHo<u
if(i1==mid+1) 5UWj#|t
data[cur]=temp[i2++]; o[$~
else if(i2>r) An0DqjR
data[cur]=temp[i1++]; AkMP)\Q
else if(temp[i1] data[cur]=temp[i1++]; 6z-ZJ|?
else gX29c
data[cur]=temp[i2++]; ,|5|aVfh
} g=G>4Ua3
} :V,agAMn
/x2-$a:<
} IKaa=r~
SSr#MIS?
改进后的归并排序: +Tf4SJ
d_7v1)j
package org.rut.util.algorithm.support; %:/@1r7o>
$<NrJgQ
import org.rut.util.algorithm.SortUtil; `kE ;V!n?
Mz59ac
/** 'dXGd.V7u
* @author treeroot N.~zQVO#R
* @since 2006-2-2 |B{@noGX
* @version 1.0 !=uaB.
*/ 6&J7=g%G
public class ImprovedMergeSort implements SortUtil.Sort { =1MVF
<cof
private static final int THRESHOLD = 10; 9~7s*3zI
;?h+8Z/{
/* M6nQ17\{
* (non-Javadoc) WilKC|R]P
* {>v5~G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \iP=V3
*/ \&8 61A;
public void sort(int[] data) { cFD3
int[] temp=new int[data.length]; 4UxxmREx;
mergeSort(data,temp,0,data.length-1); C@o8C%o
} * :kMv;9
(IXUT6|
private void mergeSort(int[] data, int[] temp, int l, int r) { s~p(59
int i, j, k; SSQB1c
int mid = (l + r) / 2; k_?Z6RE>
if (l == r) 6 l,8ev
return; ]&;K:#J
if ((mid - l) >= THRESHOLD) 4 (c{%%
mergeSort(data, temp, l, mid); {*PbD;/f
else ,J&\) yTP
insertSort(data, l, mid - l + 1); Fp&tJ]=B.
if ((r - mid) > THRESHOLD) {j8M78}3
mergeSort(data, temp, mid + 1, r); H`bS::JI-
else g)mjw
insertSort(data, mid + 1, r - mid); _LSp \{Z
goqm6L^Cu
for (i = l; i <= mid; i++) { BjyV&1tRV!
temp = data; 8=MNzcA }
} wJc`^gj
for (j = 1; j <= r - mid; j++) { Fks #Y1rI
temp[r - j + 1] = data[j + mid]; Y*QoD9<T?;
} J#?`l,
int a = temp[l]; @|PUet_pb
int b = temp[r]; i5 0c N<o
for (i = l, j = r, k = l; k <= r; k++) { l`<1Y|
if (a < b) { G' '9eV$
data[k] = temp[i++]; *x-@}WY$U
a = temp; z -c1,GOD
} else { r_hs_n!6
data[k] = temp[j--]; B,fVNpqo
b = temp[j]; ^M)+2@6
} `iNH`:[w
} 5X73@Aj
} A2.GNk
XI+GWNAmJ
/** b_vKP
* @param data ` 7P%muY.
* @param l g#q7~#9
* @param i /!'Png0!
*/ 8ZF!}kb0F
private void insertSort(int[] data, int start, int len) { #62*'.B4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R > [2*o"
} u]*f^/6Q
} =o:1Rc7J
} '2Lx>nByk
} BJgHel+N
Urz9S3#\
堆排序： fcTg/EXn
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package org.rut.util.algorithm.support; ,<BV5~T.|
tM|/OJ7
import org.rut.util.algorithm.SortUtil; A*~BkvPr
PJO.^OsM
/** =h70!) Z5
* @author treeroot |'``pq/}_
* @since 2006-2-2 0g2rajS
* @version 1.0 kX2Z@ w`
*/ ..R JHa6B
public class HeapSort implements SortUtil.Sort{ >K<cc#Aa
mM r$~^P:
/* (non-Javadoc) ?kK3%uJy&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4F"%X&$
*/ _^g4/G#13c
public void sort(int[] data) { "A*;V
MaxHeap h=new MaxHeap(); q|}O-A*wa
h.init(data); AyNpY_B0c
for(int i=0;i h.remove(); D_?dy4\
System.arraycopy(h.queue,1,data,0,data.length); %d%FI"!K
} f_Hh"Vh
`oTV)J'~
private static class MaxHeap{ #iQF)x| D
Y4+]5;B8
void init(int[] data){ QnJLTBv
this.queue=new int[data.length+1]; B@@tKn_CQ
for(int i=0;i queue[++size]=data; (-],VB (+
fixUp(size); ,vo]WIQ\:
} v cUGBGX_&
} 86eaX+F
iL!4r]~H
private int size=0; DS9-i2
6HPuCP
private int[] queue; GO.7IL{{
Z^BZH/I?
public int get() { ?,]eN&`
return queue[1]; HRyhq;C
} Z&4L///
>X*G6p
public void remove() { E`.:V<KW/
SortUtil.swap(queue,1,size--); IEd?-L
fixDown(1); AiL80W^=d)
} ;Ea8>
file://fixdown ArjRoXDE
private void fixDown(int k) { a*t @k*d_
int j; /bn$@Cy@
while ((j = k << 1) <= size) { F vTswM>
if (j < size %26amp;%26amp; queue[j] j++; cNikLd~?A
if (queue[k]>queue[j]) file://不用交换 RUq[HxF) 6
break; j;qV+Rq]t
SortUtil.swap(queue,j,k); Ly/
k = j; Q3Z?Z;2aR
} yeMe2Zx
} c^cr_i
private void fixUp(int k) { >K&chg@Hv
while (k > 1) { ei>iXDt
int j = k >> 1; ]rSg,Q>E
if (queue[j]>queue[k]) XZS%az1%
break; 4e?bkC
SortUtil.swap(queue,j,k); =.OzpV)=V
k = j; _;%l~q/
} ^O=G%de
} .beqfcj"
Q"uK6ANp'
} K'/if5>Bc
86 9sS
} Jamt@=
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SortUtil： "Bwmq9Jq
k7{|\w%
package org.rut.util.algorithm; a@Zolz_Z
*_d N9
import org.rut.util.algorithm.support.BubbleSort; #z70:-`.[M
import org.rut.util.algorithm.support.HeapSort; H+5+;`;
import org.rut.util.algorithm.support.ImprovedMergeSort; j6};K ~N`
import org.rut.util.algorithm.support.ImprovedQuickSort; WMW=RgiW\
import org.rut.util.algorithm.support.InsertSort; 0rQr#0`
import org.rut.util.algorithm.support.MergeSort; S>p0{:zM
import org.rut.util.algorithm.support.QuickSort; @y'ZM
import org.rut.util.algorithm.support.SelectionSort; I}f7|hYX
import org.rut.util.algorithm.support.ShellSort; ,t;US.s([.
*0?@/2&
/** /2hRLyeAZ
* @author treeroot ^16zZ*
* @since 2006-2-2 ycwkF$7
* @version 1.0 ,KD?kSIf
*/ *-(o. !#1
public class SortUtil { KT*>OYI
public final static int INSERT = 1; mhOgv\?
public final static int BUBBLE = 2; kwqY~@W
public final static int SELECTION = 3; hg:$H9\%
public final static int SHELL = 4; (2QfH$HEk
public final static int QUICK = 5; Gg]Jp:GF
public final static int IMPROVED_QUICK = 6; s[dIWYs#
public final static int MERGE = 7; H'7s`^- >I
public final static int IMPROVED_MERGE = 8; _<DOA:'v
public final static int HEAP = 9; qJf\,7mi
hF5T9^8
public static void sort(int[] data) { ^nNpT!o
sort(data, IMPROVED_QUICK); }N).$
} GD'Z"rhI
private static String[] name={ !f&hVLs0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,c0LRO
}; uFb 9Ic]`
U 8p %MFD
private static Sort[] impl=new Sort[]{ ]h&1|j1
new InsertSort(), jN'h/\
new BubbleSort(), WC37=8mA
new SelectionSort(), $-~"G,;F
new ShellSort(), ,FH1yJ;Y&
new QuickSort(), }@ktAt
new ImprovedQuickSort(), W}2!~ep!
new MergeSort(), b62B|0i
new ImprovedMergeSort(), om9'A=ZU
new HeapSort() FC6~V6R
}; (i1x<
vF pKkS343
public static String toString(int algorithm){ =$L+J O
return name[algorithm-1]; 2K o]Q_,~
} 3&5b!Y
'RF`XX
public static void sort(int[] data, int algorithm) { -:"KFc8A
impl[algorithm-1].sort(data); ,6pGKCUU:y
} X9SOcg3a
Q-F$Ryj^
public static interface Sort { `4X.UPJ
public void sort(int[] data); -*~ @?
} Rg\4#9S JF
~e]B[>PT
public static void swap(int[] data, int i, int j) { pwS"BTZ
int temp = data; 5GgH6
data = data[j]; GoAh{=s
data[j] = temp; *]h"J]
} `?WN*__["
} 5M~nNm[xJU