[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; {)y4Qp
} RoTT%c P_
int i1=l; )t4C*+9<U
int i2=mid+1; 71%u|k8|
for(int cur=l;cur<=r;cur++){ -FI1$
if(i1==mid+1) fwEi//1
data[cur]=temp[i2++]; J]UHq$B
else if(i2>r) '3Ri/V,
data[cur]=temp[i1++]; ,?qS#B+>
else if(temp[i1] data[cur]=temp[i1++]; "xOeBNRjV
else Ojs\2('u
data[cur]=temp[i2++]; L:<'TXsRA
} ke0W?
} QKO(8D6+
I%Awj(9BS
} qha<.Ro
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改进后的归并排序: (tgaH,G
hqBRh+[
package org.rut.util.algorithm.support; 8n)Q^z+ K
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import org.rut.util.algorithm.SortUtil; sF$m?/Kt
D4\I;M^
/** ]Oy<zU
* @author treeroot -O5m@rwt<
* @since 2006-2-2 R4/@dA0
* @version 1.0 Ir'f((8:
*/ (0+m&, z
public class ImprovedMergeSort implements SortUtil.Sort { $W]bw#NH
[OcD#~drO
private static final int THRESHOLD = 10; riL!]'akV
|#wz)=mD
/* rXPXO=F1/
* (non-Javadoc) S&*pR3,u
* 5*AKl< Jl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #vSI_rt9I
*/ b<n)`;
public void sort(int[] data) { %?fzT+-=%
int[] temp=new int[data.length]; }>w4!
mergeSort(data,temp,0,data.length-1); 4Z] 35*
} T!PX?
7r>W r#
private void mergeSort(int[] data, int[] temp, int l, int r) { DFonK{
int i, j, k; NSq=_8
int mid = (l + r) / 2; U~m.I
if (l == r) 0YL0Oa+7
return; #7=LI\
if ((mid - l) >= THRESHOLD) St`m52V(5X
mergeSort(data, temp, l, mid); YLGLr@:q
else Q)>'fZ)
insertSort(data, l, mid - l + 1); EMG*8HRI>r
if ((r - mid) > THRESHOLD) ;j=1 oW
mergeSort(data, temp, mid + 1, r); -+>am?
else ui1m+
insertSort(data, mid + 1, r - mid); RHbwq]
w.f[)
for (i = l; i <= mid; i++) { 9YABr> ?
temp = data; $b} +5
} #pfosC[
for (j = 1; j <= r - mid; j++) { i"xDQ$0G6
temp[r - j + 1] = data[j + mid]; %a `dOEO
} k:Q<Uanc[
int a = temp[l]; 3:Wr)>l}#
int b = temp[r]; gwJu&HA/
for (i = l, j = r, k = l; k <= r; k++) { I>aa'em
if (a < b) { w C"%b#(}
data[k] = temp[i++]; S41>VbtEp
a = temp; P{18crC[1
} else { DF2&j!
data[k] = temp[j--]; Ysu/7o4
b = temp[j]; 5ov%(QI
} :(Bi{cw
} $Stu-l1e a
} $P3nP=mf
[3Rj?z"S
/** 5b p"dIe
* @param data Qs:r@"hE
* @param l s 'xmv{|
* @param i 7g9^Jn
*/ Ziimz}WHF
private void insertSort(int[] data, int start, int len) { ".f:R9-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5g5NTm`=<
} Umg81!
} WKsx|a]U
} Phu| hx<
} Sj?sw]3
R:?vY!
堆排序： `x)bw
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package org.rut.util.algorithm.support; 1#"Q' ,7
4a!7|}W
import org.rut.util.algorithm.SortUtil; (+dRD]|T
vq1&8=
/** G`"Cqs<
* @author treeroot <>_WdAOuD
* @since 2006-2-2 QE2^.|d{
* @version 1.0 -QDgr`%5
*/ 6/ipdi[ _
public class HeapSort implements SortUtil.Sort{ \DK*> k
2]=I'U<E!
/* (non-Javadoc) @~3c"q;i7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dRm'$ G9
*/ j*d~h$[k
public void sort(int[] data) { N1~$ +
MaxHeap h=new MaxHeap(); "|`9{/]
h.init(data); X>7]g670@
for(int i=0;i h.remove(); \*aLyyy3
System.arraycopy(h.queue,1,data,0,data.length); <|3v@
} @l GnG
XWpnZFjE
private static class MaxHeap{ ^1=|(Z/
+Q31K7Gr
void init(int[] data){ pIiED9
this.queue=new int[data.length+1]; +z0}{,HX
for(int i=0;i queue[++size]=data; [nIG_j>D-f
fixUp(size); vqMk)htIz
} jSp&mD*xv
} +|)1_NK
x=Jn&4q
private int size=0; 6xh#;+e}
_PUm Pom.
private int[] queue; z.&%>%TPP
N09+idg
public int get() { Mk/!,N<h#
return queue[1]; h./vTNMc
} ^jjJM|a
E:=KH\2f
public void remove() { )+4}Ix/q
SortUtil.swap(queue,1,size--); E(kpK5h{
fixDown(1); SoU'r]k1x
} #UCQiQfP
file://fixdown yVQz<tX|
private void fixDown(int k) { YzW7;U S
int j; "UGj4^1f
while ((j = k << 1) <= size) { r5fkt>HZ
if (j < size %26amp;%26amp; queue[j] j++; 3H#/u! W
if (queue[k]>queue[j]) file://不用交换 #r)1<}_e#
break; ugCS &
SortUtil.swap(queue,j,k); h?3l
k = j; Ny,A#-?
} MI'l4<>u
} W<|K
private void fixUp(int k) { Bi:wP/>v
while (k > 1) { H9Q7({v
int j = k >> 1; uf'P9MA}>
if (queue[j]>queue[k]) 8pMZ~W;
break; 8~(+[[TQ@
SortUtil.swap(queue,j,k); >ydb?
k = j; [=ak>>8
} [Pwo,L,)
} |z.GSI_!)
bL],KW;Q
} |\n)<r_
#IhLpO
} qL5#.bR
ZHD0u)ri=J
SortUtil： Am%a4{b
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package org.rut.util.algorithm; _7.GzQJ
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import org.rut.util.algorithm.support.BubbleSort; ca3BJWY}J
import org.rut.util.algorithm.support.HeapSort; )):22}I#
import org.rut.util.algorithm.support.ImprovedMergeSort; GHC?Tp
import org.rut.util.algorithm.support.ImprovedQuickSort; (<R\
import org.rut.util.algorithm.support.InsertSort; <ivqe"m
import org.rut.util.algorithm.support.MergeSort; p/WH#4Xdr
import org.rut.util.algorithm.support.QuickSort; 8 ]06!7S}
import org.rut.util.algorithm.support.SelectionSort; *tfDXQ^mN
import org.rut.util.algorithm.support.ShellSort; 1;kG[z=A
+}XL>=-5
/** ciGpluQF
* @author treeroot N!Wq}#&l
* @since 2006-2-2 `Ivw`}L
* @version 1.0 Z++Z@J"
*/ m7wc)"`t
public class SortUtil { ?WQd
public final static int INSERT = 1; 'Rkvsch
public final static int BUBBLE = 2; pG F5aF7T
public final static int SELECTION = 3; CziaxJ
public final static int SHELL = 4; x"llX
public final static int QUICK = 5; :7Z\3_D/
public final static int IMPROVED_QUICK = 6; opcR~tg@r
public final static int MERGE = 7; DPS1GO*
public final static int IMPROVED_MERGE = 8; J={OOj
public final static int HEAP = 9; iPY vePQ
<m/b]|
public static void sort(int[] data) { yg-FJ/
sort(data, IMPROVED_QUICK); MpIw^a3(r
} Pm#x?1rAj
private static String[] name={ (o6[4( G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AJ?}Hel[0
}; E/8u'
/x:(SR2,
private static Sort[] impl=new Sort[]{ [[?[? V ,
new InsertSort(), : >wQwf
new BubbleSort(), T7lj39pJq
new SelectionSort(), n:*_uc^C
new ShellSort(), zJuRth)(,
new QuickSort(), 4)odFq:
new ImprovedQuickSort(), *pb:9JKi
new MergeSort(), `gt&Y-
new ImprovedMergeSort(), or%gTVZ
new HeapSort() >1a\%G
}; juYA`:qE&
!M]%8NTt2
public static String toString(int algorithm){ pqH( Tbjq
return name[algorithm-1]; (o*e<y,}W
} vTMP&a'5L
E)80S.V
public static void sort(int[] data, int algorithm) { qb-2QPEB
impl[algorithm-1].sort(data); RQo$iISwy
} $d2kHT
{8{t]LK<
public static interface Sort { 8_<&f%/
public void sort(int[] data); esh$*)1
} a81!~1A
^x_ >r6
public static void swap(int[] data, int i, int j) { ;zZ,3pl-E
int temp = data; ovQS ET18b
data = data[j]; LZUA+x(
data[j] = temp; (zS2Ndp
} ^.@yF;H
} |C$:]MZx