[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; kltW
} *o4a<.hd2
int i1=l; Uc'}y!R
int i2=mid+1; )RvX}y-
for(int cur=l;cur<=r;cur++){ g#^MO]pY
if(i1==mid+1) Iz#4!E|<
data[cur]=temp[i2++]; .(.<
else if(i2>r) !|i #g$
data[cur]=temp[i1++]; qy)~OBY
else if(temp[i1] data[cur]=temp[i1++]; +kQ=2dva
else ^]D1':
data[cur]=temp[i2++]; h=:/9O{H
} PnaiSt9p?r
} kaB4[u
|rwY
} rzn,NFI
\yFUQq:
改进后的归并排序: wW1\{<hgr
4C%pKV
package org.rut.util.algorithm.support; <Nqbp
{.jW"0U
import org.rut.util.algorithm.SortUtil; )y;7\-K0
_/noWwVu
/** O0xqA\
* @author treeroot $P?^GB>u
* @since 2006-2-2 3]*1%=~X/
* @version 1.0 $*iovam>^]
*/ ]VLseF
public class ImprovedMergeSort implements SortUtil.Sort { ?_^{9q%9
ZIc.MNq
private static final int THRESHOLD = 10; _UPfqC ?
o!KDeY
/* dCTyfXou[=
* (non-Javadoc) OQB7C0+ &
* HNv~ZAzBG-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cd"{7<OyM4
*/ wN4#j}C
public void sort(int[] data) { ]lBCK
int[] temp=new int[data.length]; dp'[I:X
mergeSort(data,temp,0,data.length-1); ceJi|`F
} ?X6}+
BDWbWA 6
private void mergeSort(int[] data, int[] temp, int l, int r) { 'u;O2$
int i, j, k; _3yG<'f[Y
int mid = (l + r) / 2; Z9+fTT
if (l == r) H4AT>}ri
return; tLa%8@;'$
if ((mid - l) >= THRESHOLD) |oXd4
mergeSort(data, temp, l, mid); ZDbe]9#Xh
else :vG0 l\
insertSort(data, l, mid - l + 1); %J^x `P
if ((r - mid) > THRESHOLD) ^zQI_ydG
mergeSort(data, temp, mid + 1, r); 60u_,@rV
else 2*V[kmD/3
insertSort(data, mid + 1, r - mid); ~8u *sy
"^\q{S&q2P
for (i = l; i <= mid; i++) { s) shq3O
temp = data; dM^Z,;u
} #Ir?v
for (j = 1; j <= r - mid; j++) { 0O>ClE~P
temp[r - j + 1] = data[j + mid]; /0XMQy
} Tgr,1)T
int a = temp[l]; uoI7' :Nv
int b = temp[r]; +lqGf
for (i = l, j = r, k = l; k <= r; k++) { pOo016afmA
if (a < b) { q -8G
data[k] = temp[i++]; *??lwvJp
a = temp; */n8T]s
} else { ([dd)QU
data[k] = temp[j--]; c Pf_B=
b = temp[j]; ggx_h
} 1d<Uwb>
} kygw}|, N
} bT^dtEr[
M>]A!W=
/** l\*9rs:!
* @param data #Or;"}P>fB
* @param l F`QViZ'n>#
* @param i K8sRan[4}
*/ _V-KyK
private void insertSort(int[] data, int start, int len) { p/HDG ^T:u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2H)4}5H
} 7PX`kI
} , ,{UGe3
} 6p)AQTh>
} Q,&Li+u|
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堆排序： QS&B"7;g
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package org.rut.util.algorithm.support; 6(f'P_*
Yg^ &4ZF
import org.rut.util.algorithm.SortUtil; Y#ZgrziYM
[7FG;}lB-
/** \:WWrY8&
* @author treeroot qJrT
* @since 2006-2-2 c>B1cR
* @version 1.0 :x*)o+
*/ mLxgvp
public class HeapSort implements SortUtil.Sort{ (?na|yd
}|kFHodo
/* (non-Javadoc) @owneSD qN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }oRBQP^&K
*/ dz] 5s
public void sort(int[] data) { m0"K^p
MaxHeap h=new MaxHeap(); TmQIpeych
h.init(data); MIrx,d
for(int i=0;i h.remove(); rGyAzL]
System.arraycopy(h.queue,1,data,0,data.length); fORkH^Y(&
} K -U}sW
,_Z(!| rW
private static class MaxHeap{ /uwi$~Ed
_qxI9Q}<"
void init(int[] data){ ?FQ#I~'<
this.queue=new int[data.length+1]; XVYFyza;
for(int i=0;i queue[++size]=data; Fz%;_%j
fixUp(size); e"nm<&
} b|d-vnYE
} 52e>f5m.
<W"W13*j!
private int size=0; O,Q.-
hJ}i+[~be
private int[] queue; j<B9$8x&
vwU1}H
public int get() { >.iF,[.[F<
return queue[1]; f~`=I NrU
} Q5+1'mzAB
'dLw8&T+W
public void remove() { !*N9PUM
SortUtil.swap(queue,1,size--); <1D|TrP
fixDown(1); ]%' AZ`8
} Qd[_W^QI
file://fixdown BNu >/zGpB
private void fixDown(int k) { 0ns\:2)cEB
int j; }Y~Dk]*
while ((j = k << 1) <= size) { E7:xPNU
if (j < size %26amp;%26amp; queue[j] j++; =:-fK-d
if (queue[k]>queue[j]) file://不用交换 )(G9[DG
break; HC%Hbc~S_Q
SortUtil.swap(queue,j,k); .A2$C|a*
k = j; =&WIa#!=
} 'a['lF
} 5?kfE
private void fixUp(int k) { ?h= n5}Y
while (k > 1) { v`HER6
int j = k >> 1; Y}:~6`-jj
if (queue[j]>queue[k]) gxv^=;2C
break; m\L`$=eO8
SortUtil.swap(queue,j,k); b2m={q(s
k = j; Zse&{
} $9)os7H7
} ;w7mr1
y6XOq>
} WAa45G
B*(]T|ff<
} p)y5[HX
j/O~8o&
SortUtil： [FO4x`
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package org.rut.util.algorithm; 7n8nJTU{4j
^3;B4tj[
import org.rut.util.algorithm.support.BubbleSort; -*C WF|<G
import org.rut.util.algorithm.support.HeapSort; IOy0WHl|
import org.rut.util.algorithm.support.ImprovedMergeSort; D}_.D=)
import org.rut.util.algorithm.support.ImprovedQuickSort; 5R7x%3@L
import org.rut.util.algorithm.support.InsertSort; v@_1V
import org.rut.util.algorithm.support.MergeSort; mci> MEb
import org.rut.util.algorithm.support.QuickSort; uUH4vUa
import org.rut.util.algorithm.support.SelectionSort; `JySuP2~/
import org.rut.util.algorithm.support.ShellSort; XB)D".\
$|N6I
/** {213/@,
* @author treeroot T ozx0??)
* @since 2006-2-2 (bsx|8[
* @version 1.0 (2g a:}K
*/ ;8sL
public class SortUtil { X0/slOT
public final static int INSERT = 1; NJUKH1lIhR
public final static int BUBBLE = 2; GWA"!~Hu
public final static int SELECTION = 3; IDohv[#
public final static int SHELL = 4; b}[S+G-9W
public final static int QUICK = 5; 6d-\+t8
public final static int IMPROVED_QUICK = 6; k# [!; <
public final static int MERGE = 7; <LHhs<M'
public final static int IMPROVED_MERGE = 8; l5[5Y6c>
public final static int HEAP = 9; 2Ez<Iw
E9:@H;Gc
public static void sort(int[] data) { cS ~OxAS
sort(data, IMPROVED_QUICK); M<vPE4TIr*
} SyWZOE%p
private static String[] name={ :gVUk\)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K d&/9<{>
}; d)o5JD/
kwI``7g8*e
private static Sort[] impl=new Sort[]{ L)e"qC_-
new InsertSort(), HQqFrR
new BubbleSort(), U0x A~5B
new SelectionSort(), YvR bM
new ShellSort(), -ss= c#
new QuickSort(), USg"wJY
new ImprovedQuickSort(), acd[rjeT
new MergeSort(), ~iL^KeAp
new ImprovedMergeSort(), uo9#(6
new HeapSort() Q]ersA8 V>
}; dSM\:/t
F.9}jd{
public static String toString(int algorithm){ hZ&KE78?
return name[algorithm-1]; Pfd1[~,
} FuhmLm'p
broLC5hbQU
public static void sort(int[] data, int algorithm) { rB>ge]$.
impl[algorithm-1].sort(data); >!963>DR
} n;g'?z=hy
5ZCu6A
public static interface Sort { *dl hRa
public void sort(int[] data); Fr9/TI
} w,UE0i9I
JJ: ku&Mb
public static void swap(int[] data, int i, int j) { h4Crq Yxa_
int temp = data; $y(;"hy
data = data[j]; Obs#2>h
data[j] = temp; wlS/(:02
} 6u[fCGi%
} 3I6ocj[,