[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; <$C3] =2
} VA %lJ!$
int i1=l; pOhjq#}
int i2=mid+1; &[N_{O|
for(int cur=l;cur<=r;cur++){ `B$Pk0>5r
if(i1==mid+1) NSq29#
data[cur]=temp[i2++]; 'a:';hU3f
else if(i2>r) O[p c$Pi
data[cur]=temp[i1++]; P:5vS:s?
else if(temp[i1] data[cur]=temp[i1++]; =F5zU5`i
else Tr;&bX5]H
data[cur]=temp[i2++]; 7;Vmbt9
} '?LqVzZI
} S,a:H*Hf
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} tJGK9!MH{(
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改进后的归并排序: \XfLTv
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package org.rut.util.algorithm.support; CioS}K
-"XHN=H
import org.rut.util.algorithm.SortUtil; ]LMtZUz
%zhSSB=BJ
/** 3T[zieX
* @author treeroot ,vBB". LY'
* @since 2006-2-2 zz8NBO
* @version 1.0 VJ1rU mO~
*/ n;~'W*Ln0
public class ImprovedMergeSort implements SortUtil.Sort { =)x+f/c]
1)f <
private static final int THRESHOLD = 10; >gl.ILo
=Q6JXp
/* R3.8Dr0f
* (non-Javadoc) 42:,*4t(
* E 5mYFVK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ( efxw
*/ m6Qm }""
public void sort(int[] data) { Z|A+\#'
int[] temp=new int[data.length]; 2(P<TP._E
mergeSort(data,temp,0,data.length-1); LKZv#b[h
} -$,'|\Y
E 0@u|
private void mergeSort(int[] data, int[] temp, int l, int r) { QT|\TplJt
int i, j, k; S%wdXe
int mid = (l + r) / 2; j%':M
if (l == r) >LB*5
return; z$Qy<_l
if ((mid - l) >= THRESHOLD) \3hFb,/4k
mergeSort(data, temp, l, mid); y(Em+YTD
else -U;=]o1
insertSort(data, l, mid - l + 1); c_aj-`BKp
if ((r - mid) > THRESHOLD) kZR(0, W
mergeSort(data, temp, mid + 1, r); dl6Ju
else "Id1H
insertSort(data, mid + 1, r - mid); NS "1zR+
<S12=<c?'
for (i = l; i <= mid; i++) { DU-dIqi
temp = data; o@L '|#e
} (?i4P5s[!
for (j = 1; j <= r - mid; j++) { }}oIZP\qM
temp[r - j + 1] = data[j + mid]; K 28s<i`
} (-@I'CFd
int a = temp[l]; KHM,lj*
int b = temp[r]; SPauno <M
for (i = l, j = r, k = l; k <= r; k++) { q#"lnc<S
if (a < b) { F'@9kdp
data[k] = temp[i++]; $^YHyfh
a = temp; S8C}C#
} else { E/gfX
data[k] = temp[j--]; o?I`n*u"X
b = temp[j]; 8:Dkf v
} V}FH5z |
} 4{0vdpo3F
} Fu[GQ6{f
&<cP{aBa
/** n-1
* @param data P!{J28dj
* @param l |\)Y,~;P
* @param i M[e^Z}w.V
*/ |lyspD
private void insertSort(int[] data, int start, int len) { +;bZ(_ohG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :*cd$s
} 'CRjd~L
} []?*}o5&>T
} /74)c~.W
} Gsz$H_
]}.|b6\
堆排序： ^Of\l:q*
g``S SU
package org.rut.util.algorithm.support; c4bvJy8
7Oi<_b
import org.rut.util.algorithm.SortUtil; 7324#HwS
5JG`FRW!
/** KXBTJ&
* @author treeroot g3Ul'QJ
* @since 2006-2-2 7_eV.'h
* @version 1.0 zXxA"
*/ {yMkd4v
public class HeapSort implements SortUtil.Sort{ Ix0#eoj
Eks<O
/* (non-Javadoc) =!/T4Oo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4I.)>+8V
*/ \@zoM:[sN
public void sort(int[] data) { \[/}Cy
MaxHeap h=new MaxHeap(); Yfy";C7X
h.init(data); QHtN_Q_F
for(int i=0;i h.remove(); uI3oPP> $
System.arraycopy(h.queue,1,data,0,data.length); { 3 "jn
} i;:}{G<
vF'IK,
private static class MaxHeap{ ~N)(|N
$-(lp0\*
void init(int[] data){ _6L'}X$)N
this.queue=new int[data.length+1]; YI]/gWeu
for(int i=0;i queue[++size]=data; %2beoH'
fixUp(size); ;x/.8fA
} |_a^+!P
} fS%B/h=
"Q{7X[$$^
private int size=0; u=0161g
~$1g"jIw
private int[] queue; ]UZP dw1D
ghk"XJ|
public int get() { }$a*XY1
return queue[1]; r/QI-Cf&
} 6HH:K0j3'
u5`b")a
public void remove() { T ^/\Rr
SortUtil.swap(queue,1,size--); "J`#
fixDown(1); P75@Yu(
} gmOP8.g
file://fixdown Ia:M+20n
private void fixDown(int k) { CU/Id`"tW
int j; 1`Uu;mz
while ((j = k << 1) <= size) { WISK-z
if (j < size %26amp;%26amp; queue[j] j++; ~SXqhX-`
if (queue[k]>queue[j]) file://不用交换 ^xr &E
break; m,F4N$
SortUtil.swap(queue,j,k); 59V8cO+qH
k = j; !VHw*fL|r
} ~b[5}_L=>
} hl8oE5MU
private void fixUp(int k) { =n;LP#(h?
while (k > 1) { $4]4G=o
int j = k >> 1; xg;F};}5$
if (queue[j]>queue[k]) <B+ WM
break; ;U?323Z
SortUtil.swap(queue,j,k); rgEN~e'
k = j; -JclEp
} uY3?(f#
} sjHcq5#U!
Q0L1!}w
} UAC"jy1D
^ JU#_
} G}nj 71=H
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SortUtil： ~SwGZ
gj }Vnv1[
package org.rut.util.algorithm; xk^`4;
unr`.}A2>
import org.rut.util.algorithm.support.BubbleSort; mlz|KI~\F;
import org.rut.util.algorithm.support.HeapSort; HrRw
import org.rut.util.algorithm.support.ImprovedMergeSort; V\AF%=6}
import org.rut.util.algorithm.support.ImprovedQuickSort; }3-`e3
import org.rut.util.algorithm.support.InsertSort; WHRBYq_
import org.rut.util.algorithm.support.MergeSort; 02^Nf7DMR
import org.rut.util.algorithm.support.QuickSort; ;rXZ?"
import org.rut.util.algorithm.support.SelectionSort; uzS;&-nA
import org.rut.util.algorithm.support.ShellSort; tHFUV\D;,
V}h)e3X
/** Lv#}Gm
* @author treeroot Zb+n\sv4
* @since 2006-2-2 IYhn*
* @version 1.0 ^[q/w<_j~
*/ B!J&=*=e
public class SortUtil { _V3}F1?W
public final static int INSERT = 1; [6nN]U~Y
public final static int BUBBLE = 2; \WZSY||C|_
public final static int SELECTION = 3; &B$%|~Y5
public final static int SHELL = 4; d 0:;IUG
public final static int QUICK = 5; 0aYoc-( A
public final static int IMPROVED_QUICK = 6; TR:4$92:H
public final static int MERGE = 7; WKq{g+a
public final static int IMPROVED_MERGE = 8; ^KQZ;[B
public final static int HEAP = 9; :=K+~?
gbu)bqu2x
public static void sort(int[] data) { z/pxZB~"
sort(data, IMPROVED_QUICK); 0 R>!jw
} O#)YbaE
private static String[] name={ .gCun_td#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hh-sm8
}; 'Ojxzz*tT
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private static Sort[] impl=new Sort[]{ Iz!]LW
new InsertSort(), g,f AVM
new BubbleSort(), w1+ %+x
new SelectionSort(), &InFC5A
new ShellSort(), y!~ }7=
new QuickSort(), (^~~&/U_U$
new ImprovedQuickSort(), +y 48.5
new MergeSort(), E/^N
new ImprovedMergeSort(), ,oJ$m$(Lj
new HeapSort() 2rM/kF >g
}; H)X&5E
y`pgJO
public static String toString(int algorithm){ {7EpljH@
return name[algorithm-1]; w%%*3[--X
} ,/dW*B
es\Fn#?O
public static void sort(int[] data, int algorithm) { @$;I%
impl[algorithm-1].sort(data); 0fN; L;v
} 26=G%F6
VD+v\X_
public static interface Sort { |[$TT$Fb
public void sort(int[] data); OS=~<ba
} +]e) :J
caL\ d
public static void swap(int[] data, int i, int j) { a*nCvZ
int temp = data; wKbU}29c
data = data[j]; 8,)<,g-/=
data[j] = temp; 0*KL*Gn
} QH kjxj
} Yd<9Y\W%?