[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; #M!!CX*k
} Iz[@^IUx=
int i1=l; jM:Y'l]
int i2=mid+1; mYU9 trHV
for(int cur=l;cur<=r;cur++){ |]Qg7m,O
if(i1==mid+1) wW"z
data[cur]=temp[i2++]; ,<:!NF9
else if(i2>r) 3R&lqxhg
data[cur]=temp[i1++]; _`#3f1F@[
else if(temp[i1] data[cur]=temp[i1++]; 1xc~`~
else yObuWDA9
data[cur]=temp[i2++]; al`3Lu0
} kapC%/6"
} z%/N!RLW
smm]6
} ]!IVz)<E&
}(<%`G6N
改进后的归并排序: hb{u'=
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package org.rut.util.algorithm.support; N 75:5
`EtS!zD~b
import org.rut.util.algorithm.SortUtil; V_Wwrhua
#6!52
/** V#jWege
* @author treeroot F_bF
* @since 2006-2-2 apk4j\i?5
* @version 1.0 ,<A$h3*
*/ .6OgO{P:
public class ImprovedMergeSort implements SortUtil.Sort { !d&C>7nb
.SWt3|Pi5
private static final int THRESHOLD = 10; 2y%,p{="
mYc.x
/* #Oha(mRY
* (non-Javadoc) )z8!f}:De=
* %0Y=WYUH>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KLX/O1B
*/ ,TRTRb;
public void sort(int[] data) { $#|gLVOQ
int[] temp=new int[data.length]; <94_@3
mergeSort(data,temp,0,data.length-1); (5Sivw*mP
} IG3,XW
r&Ca"dI
private void mergeSort(int[] data, int[] temp, int l, int r) { p!/[K6u
int i, j, k; Z#.f&K )xX
int mid = (l + r) / 2; 45&8weXO:'
if (l == r) {Q<$Uo6V
return; oy<WUb9W
if ((mid - l) >= THRESHOLD) B>Wu;a.:L
mergeSort(data, temp, l, mid); j|tC@0A
else `nO71mo
insertSort(data, l, mid - l + 1); 6:% L![FX
if ((r - mid) > THRESHOLD) JH7Ad (:
mergeSort(data, temp, mid + 1, r); Ez{MU@Fk
else ql<rU@
insertSort(data, mid + 1, r - mid); "KJ%|pg_C
?6!]Nl1gr
for (i = l; i <= mid; i++) { >E,U>@+
temp = data; m4:^}O-#
} T}3v(6ew4
for (j = 1; j <= r - mid; j++) { >h+349
temp[r - j + 1] = data[j + mid]; +\"-P72vjk
} 3zT_^;:L
int a = temp[l]; |;A/|F0-e
int b = temp[r]; VzJ5.mRQ
for (i = l, j = r, k = l; k <= r; k++) { U4G}DCU
if (a < b) { Tg3!Rq55
data[k] = temp[i++]; }qjCTEs}
a = temp; v_<2H'*Q
} else { ,^8MB.
data[k] = temp[j--]; NU(AEfF
b = temp[j]; BGr.yEy
} "g+z !4b#
} @u._"/K
} *1@:'rJ
{ BEo &
/** iBudmT8
* @param data gN {'UDg
* @param l iRi{$.pVJ
* @param i h3gWOU
*/ IHC1G1KW=A
private void insertSort(int[] data, int start, int len) { :D7|%KK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?GBkqQ
} Z2"?&pKV
} hO[3Z^X
} US{3pkr;I]
} +%\oO/4Fs
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堆排序： S-+M;@'Rl
gK|R =J
package org.rut.util.algorithm.support; O--7<Q\
IaFr&
import org.rut.util.algorithm.SortUtil; ;W:6{9m ze
oVCmI"'
/** ^nVl (^{
* @author treeroot j8 C8X$
* @since 2006-2-2 _#o' +_Z
* @version 1.0 }1-I[q6
*/ z<]bv7V
public class HeapSort implements SortUtil.Sort{ X5 ITF)&
^/Sh=4=G
/* (non-Javadoc) CVXytS?@x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #=}$OFg
*/ &W }<:WH~
public void sort(int[] data) { uIMe
MaxHeap h=new MaxHeap(); 9N[EZhW
h.init(data); `B8tmW#
for(int i=0;i h.remove(); nT#JOmv
System.arraycopy(h.queue,1,data,0,data.length); $\AEWFB
} nU`Lhh8y
}%n5nLU`
private static class MaxHeap{ f=J<*h
2>em0{e
void init(int[] data){ 6k?`:QK/sl
this.queue=new int[data.length+1]; >NV=LOO
for(int i=0;i queue[++size]=data; %~*jae!f
fixUp(size); >uJ/TQU
} x O7IzqY
} rsa&Oo D>
)R{UXk3q}
private int size=0; jw6Tj;c
O7aLlZdg~
private int[] queue; +Zk,2ri
ep(g`e
public int get() { U\+&cob.
return queue[1]; 5+X_4lEJK(
} c#xP91.m
D&hqV)d4R
public void remove() { Y|0ow_oH
SortUtil.swap(queue,1,size--); VanB>|p6
fixDown(1); }gf}eH
} `Iy4=nVb
file://fixdown p SN~DvR
private void fixDown(int k) { b~7drf
int j; N<z`yV
while ((j = k << 1) <= size) { |sgXh9%x<
if (j < size %26amp;%26amp; queue[j] j++; 5nCu~<uJ
if (queue[k]>queue[j]) file://不用交换 !d9AG|
break; 9>,Qgp,w
SortUtil.swap(queue,j,k); K^%-NyV
k = j; u@FsLHn
} ?)3jqQ.
} "r.2]R3
private void fixUp(int k) { o4=Yu7L
while (k > 1) { Gk~l,wV>
int j = k >> 1; r{+aeLu
if (queue[j]>queue[k]) )WR_ ug
break; 8 |h9sn;P
SortUtil.swap(queue,j,k); oUW<4l
k = j; u}H$-$jE
} 2pyt&'NJua
} \+qOO65/+
nbdGt
} EH`0
UCqs}U8
} Gg0#H^s( (
J.M.L$
SortUtil： [EHrIn
evl-V>
package org.rut.util.algorithm; 'zgvQMu
't>r sp+#
import org.rut.util.algorithm.support.BubbleSort; K}I0o!(#
import org.rut.util.algorithm.support.HeapSort; nJ3vi}`
import org.rut.util.algorithm.support.ImprovedMergeSort; OKwOugi0
import org.rut.util.algorithm.support.ImprovedQuickSort; 0|)19LR
import org.rut.util.algorithm.support.InsertSort; oJaAM|7uv
import org.rut.util.algorithm.support.MergeSort; V"d=.Hb>
import org.rut.util.algorithm.support.QuickSort; Pl~P-n
import org.rut.util.algorithm.support.SelectionSort; iH)Nk^
import org.rut.util.algorithm.support.ShellSort; P6?0r_Y
!eD+GDgE]
/** L{ ^4DznI
* @author treeroot , &' Y
* @since 2006-2-2 =v"xmx&4
* @version 1.0 `"y{;PCt_
*/ >BqCkyM9Kf
public class SortUtil { K%,$ V,#
public final static int INSERT = 1; uzorLeu
public final static int BUBBLE = 2; dhR(_
public final static int SELECTION = 3; 9d[qhkPu)
public final static int SHELL = 4; .L;",E
public final static int QUICK = 5; u2qV6/
public final static int IMPROVED_QUICK = 6; MguL$W&l
public final static int MERGE = 7; 4'At.<]jL
public final static int IMPROVED_MERGE = 8; Mz|L-62
public final static int HEAP = 9; t;Wotfc[#0
NoW!xLI
public static void sort(int[] data) { B/YcSEY;
sort(data, IMPROVED_QUICK); S=R3"~p
} lpEDPvD_Vm
private static String[] name={ kHU"AD}.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _Dq Qfc%
}; jEU'.RBN%
\5[-Ml
private static Sort[] impl=new Sort[]{ Kd{#r/HZ
new InsertSort(), r<FQX3
new BubbleSort(), 8Uj:
new SelectionSort(), { R*Y=Ie
new ShellSort(), 6/y*2z;
new QuickSort(), ZC\mxBy
new ImprovedQuickSort(), /e5\9
new MergeSort(), anx&Xj|=.F
new ImprovedMergeSort(), Q#rt<S1zW
new HeapSort() IrO+5w
}; ul}'{|4
q,,j',8kq/
public static String toString(int algorithm){ (UW6F4:$
return name[algorithm-1]; ( Yi=v'd
} ^]rxhpS
u_'nOle K
public static void sort(int[] data, int algorithm) { Oc-u=K,B
impl[algorithm-1].sort(data); ze"~Ird
} L[]^{ O
UA0tFeH
public static interface Sort { YmCbxYa7
public void sort(int[] data); 4_< nQ9K
} U?6yke
^uBwj}6
public static void swap(int[] data, int i, int j) { (n=Aa;
int temp = data; ?Y!^I2Y6
data = data[j]; @W [{2d
data[j] = temp; F^sw0 .b
} h3t$>vs2F"
} j#o3