[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; hPqapz]HcP
} z)<pqN
int i1=l; 4|@FO}rK[l
int i2=mid+1; 0LHiOav
for(int cur=l;cur<=r;cur++){ RESGI}u
if(i1==mid+1) j]F#p R}p
data[cur]=temp[i2++]; Lm*LJ_+ B
else if(i2>r) 53u.pc
data[cur]=temp[i1++]; kq1M<lk
else if(temp[i1] data[cur]=temp[i1++]; |q!2i
else Ti@P4:q
data[cur]=temp[i2++]; dl7p1Cr
} *F8uu.
} Eip~~2
sNk>0 X[
} eFXi )tl
HDW\S#
改进后的归并排序: 1:;&wf
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package org.rut.util.algorithm.support; A]SB c2
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import org.rut.util.algorithm.SortUtil; xBI"{nGoN
cV,03]x
/** YZ%f7BUk
* @author treeroot *l?% o{
* @since 2006-2-2 _"w!KNX>(~
* @version 1.0 ++{+ #s6
*/ Kt* za
public class ImprovedMergeSort implements SortUtil.Sort { WfjUJw5x"s
o%~K4 M".
private static final int THRESHOLD = 10; kDpZnXP
:J4C'N
/* )r|zi Z{F
* (non-Javadoc) #:\+7mCF
* J*lYH]s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VGDEP!)-8
*/ milK3+N
public void sort(int[] data) { wmcp`8w.
int[] temp=new int[data.length]; rW%'M#! =
mergeSort(data,temp,0,data.length-1); yA>p[F
} {}_Oo%IVGK
yYg&'3
private void mergeSort(int[] data, int[] temp, int l, int r) { {u=\-|t
int i, j, k; bQN4ozSi
int mid = (l + r) / 2; by y1MgQd
if (l == r) sImxa`kb
return; J0WXH/:
if ((mid - l) >= THRESHOLD) K?OX
mergeSort(data, temp, l, mid); Zn 5m.=z
else kFa?q}47
insertSort(data, l, mid - l + 1); 9B;Sk]y
if ((r - mid) > THRESHOLD) eP'kY(g8
mergeSort(data, temp, mid + 1, r); sK9h=J;F/
else -qCJwz30
insertSort(data, mid + 1, r - mid); }9Dv\"t5
B3+WOf5W
for (i = l; i <= mid; i++) { u/:Sf*;?
temp = data; "vRqtEBO@
} gMK3o8B/
for (j = 1; j <= r - mid; j++) { #/v_h6$
temp[r - j + 1] = data[j + mid]; Tx?@*Q
} rnBeL _8C
int a = temp[l]; 4a\+o]
int b = temp[r]; ]jY)M<:J4
for (i = l, j = r, k = l; k <= r; k++) { n]{}C.C=
if (a < b) { N8(x),
data[k] = temp[i++]; .Zt/e>K&
a = temp; 0JRBNh
} else { ZG[0rvW
data[k] = temp[j--]; Joo)GIB
b = temp[j]; <C`eZ}Qqv
} |2&mvjk@H
} gLxyRbVI
} 4aGpKvW
dvWlx]'
/** (X7yNIPfA
* @param data ~u`! Gi
* @param l EkAqFcKLq
* @param i yrYaKh
*/ ,v5>sL
private void insertSort(int[] data, int start, int len) { &+{xR79+&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0|Ft0y`+
} !9cPNIi
} +~{nU'
} 0m!ZJHe
} d@4=XSj
z'K7J'(R
堆排序： <0qY8
]G&\L~P
package org.rut.util.algorithm.support; K:50?r_-6
%t|2GIu
import org.rut.util.algorithm.SortUtil; zw9ULQ$#
;S27m]Q?
/** XN%D`tbvJ
* @author treeroot 3:Egqw
* @since 2006-2-2 $/#)
* @version 1.0 uOUw8
*/ 2}\sj'0&
public class HeapSort implements SortUtil.Sort{ ^B=z_0 *
7IW7'klkvD
/* (non-Javadoc) \mit&EUh}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A_ z:^9
*/ %a^!~qV
public void sort(int[] data) { P3FpU<OBwp
MaxHeap h=new MaxHeap(); 2m}]z.w#
h.init(data); &|FG#.2yw
for(int i=0;i h.remove(); yXl.Gq>]{
System.arraycopy(h.queue,1,data,0,data.length); s/^=WV
} DYk->)
/38Pp%
private static class MaxHeap{ F qyJ*W\1
dsoRPX']=
void init(int[] data){ 'N/%SRk
this.queue=new int[data.length+1]; 2p.+C35c=j
for(int i=0;i queue[++size]=data; -;.fU44O[#
fixUp(size); }(O kl1
} 1L9 <1
} EHJc*WFPU-
iv`-)UsE
private int size=0; au~gJW-
>(Ddw N9l
private int[] queue; jXva?_
gz:c_HJ
public int get() { mM~Q!`Nf.
return queue[1]; n!orM5=:O
} Y(mwJud|
t~#+--(
public void remove() { Ek\Zi#f<
SortUtil.swap(queue,1,size--); ViONG]F
fixDown(1); P9~kN|
} 3CL:VwoW
file://fixdown !}m8]&
private void fixDown(int k) { }E_zW.{!
int j; j+v)I=
while ((j = k << 1) <= size) { X,Q(W0-6$u
if (j < size %26amp;%26amp; queue[j] j++; %j`]x -aOz
if (queue[k]>queue[j]) file://不用交换 imuHSxcaV
break; ~.SU$
SortUtil.swap(queue,j,k); nW[aPQ[R
k = j; TQfY%GKg(
} "K]4j]yU
} @}}1xP4Sr
private void fixUp(int k) { ^U1+D^AJ
while (k > 1) { yrb%g~ELGn
int j = k >> 1; I*t}gvUt9
if (queue[j]>queue[k]) _J`M>W)8
break; '7%9Sqx
SortUtil.swap(queue,j,k); ?q7Gs)B=^'
k = j; -O6o^Dk
} 8;bOw
} uu#+|ZD
o W [-?
} RR9s%>^
oOvbel`;
} \8H"lcj:
oOw"k*,h:S
SortUtil： ^`9OA`2
g M.(BN
package org.rut.util.algorithm; iE{SqX
eLWzd_ln
import org.rut.util.algorithm.support.BubbleSort; [:Y^0[2
import org.rut.util.algorithm.support.HeapSort; {rr\hl-$
import org.rut.util.algorithm.support.ImprovedMergeSort; E_#&L({|@
import org.rut.util.algorithm.support.ImprovedQuickSort; q9Wtu7/
import org.rut.util.algorithm.support.InsertSort; tp0*W _<4
import org.rut.util.algorithm.support.MergeSort; =Ih_[$1dw
import org.rut.util.algorithm.support.QuickSort; oWT0WS
import org.rut.util.algorithm.support.SelectionSort; GR9F^Y)K{
import org.rut.util.algorithm.support.ShellSort; 0_)\e
Il[WXt<S
/** Ei!z? sxzx
* @author treeroot z5zm,Jw
* @since 2006-2-2 o qTh )
* @version 1.0 -R]S)Odml
*/ +z_0?x
public class SortUtil { ('Pd GV4V
public final static int INSERT = 1; l K%Hb=
public final static int BUBBLE = 2; p<NgT1"{
public final static int SELECTION = 3; uW|y8 BP $
public final static int SHELL = 4; -8:@xG2
public final static int QUICK = 5; 1F-L(\oKm
public final static int IMPROVED_QUICK = 6; n1V*VQV
public final static int MERGE = 7; %r!-*p<i|
public final static int IMPROVED_MERGE = 8; [o "@*kf
public final static int HEAP = 9; V"z0]DP5~
[ CY=
public static void sort(int[] data) { *&km5@*
sort(data, IMPROVED_QUICK); N[%IrN3
} -rBj-4|"
private static String[] name={ p_D)=Ef|&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y2fs$emv
}; 92R{V%)G
Z(cgI5Pu
private static Sort[] impl=new Sort[]{ ]v@,>!Wn
new InsertSort(), 8dNJZoV
new BubbleSort(), 8^~]Ym:
new SelectionSort(), GbhaibkO
new ShellSort(), 4-AmzU
new QuickSort(), Tu"](|I>
new ImprovedQuickSort(), E6uIp^E
new MergeSort(), -ydT%x
new ImprovedMergeSort(), 8w4.|h5FP
new HeapSort() @r<w|x}
}; d*(1t\
e): &pqA
public static String toString(int algorithm){ _[V 6s#Wk3
return name[algorithm-1]; qohUxtnTK>
} L=>N#QR7
zB4gnVhus|
public static void sort(int[] data, int algorithm) { 6b0#z#E
impl[algorithm-1].sort(data); :7maN^
} k&*=:y}
d] {^
public static interface Sort { y~w$>7U.
public void sort(int[] data); JyV"jL
} hhpH)Bi=
2Ig.hnHj
public static void swap(int[] data, int i, int j) { ><Z2uJZ4x
int temp = data; s;L7 _.hH@
data = data[j]; ;G?_^ 0
data[j] = temp; h c"n?
} 3;&N3:,X
} :jA~zHO