[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; /cP"h!P}~~
} ?%[jR=w
int i1=l; IW] rb/H
int i2=mid+1; T]~xj4
for(int cur=l;cur<=r;cur++){ -zfR)(zG
if(i1==mid+1) ]:J$w]\
data[cur]=temp[i2++]; 7HYwLG:\~
else if(i2>r) +mT_QsLEv
data[cur]=temp[i1++]; a9Zq{Ysj
else if(temp[i1] data[cur]=temp[i1++]; {E|$8)58i
else '!B&:X)
data[cur]=temp[i2++]; 5\VWCI
} c@L< Z`u
} ~((O8@}J
F*ylnB3z
} DkDmE
l+0oS'`V*L
改进后的归并排序: BnF^u5kv%
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package org.rut.util.algorithm.support; Nu)NqFG,
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import org.rut.util.algorithm.SortUtil; g*+>H1}
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/** _7_Y={4=`
* @author treeroot :?1Dko^
* @since 2006-2-2 8'y$M] e9n
* @version 1.0 0?|<I{z2
*/ *.w9c
public class ImprovedMergeSort implements SortUtil.Sort { wi{3/
O+x!Bg7
private static final int THRESHOLD = 10; {(Es(Sb}c
R2vlFx/
/* Q\sK"~@3
* (non-Javadoc) $U-0)4yf
* vo{--+{ky!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %JTpI`
*/ 4 s9LB
public void sort(int[] data) { t\O16O7S
int[] temp=new int[data.length]; 4Ftu
mergeSort(data,temp,0,data.length-1); lNO;O}8
} *wjrR1#81x
-jmY)(\
private void mergeSort(int[] data, int[] temp, int l, int r) { zX i'kB
int i, j, k; p0eX{xm
int mid = (l + r) / 2; JC}D`h
if (l == r) |-~Y#]
return; Pr C{'XDlU
if ((mid - l) >= THRESHOLD) a(ZcmYzXU
mergeSort(data, temp, l, mid); |CbikE}kL
else @oGcuE
insertSort(data, l, mid - l + 1); 0#gK6o!
if ((r - mid) > THRESHOLD) :7;@ZEe
mergeSort(data, temp, mid + 1, r); H3oFORh
else P16~Qj
insertSort(data, mid + 1, r - mid); VuZr:-K/
%E;'ln4h&,
for (i = l; i <= mid; i++) { _7y[B&g[r
temp = data; #~=RyH
} $3kH~3{]
for (j = 1; j <= r - mid; j++) { 7F~X,Dk_
temp[r - j + 1] = data[j + mid]; 9} .z;prz
} es0hm2HT3
int a = temp[l]; sV*H`N')S
int b = temp[r]; hOK8(U0
for (i = l, j = r, k = l; k <= r; k++) { n~Lt\K:
if (a < b) { ]T) 'Hb
data[k] = temp[i++]; _DEjF)S
a = temp; z`b,h\
} else { 7F.4Ga;
data[k] = temp[j--]; %A0/1{(
b = temp[j]; ql~J8G9
} u_Z+;{]Pj
} e&>2 n
} `\ol,B_l
i,VMd
/** O^rDHFj,
* @param data b|(:[nB
* @param l |JsZJ9W+J
* @param i _,*r_D61S
*/ KqP#6^ _
private void insertSort(int[] data, int start, int len) { )=(kBWM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M869MDo
} *qpSXmOz
} M)(DZ}
} oxtay7fx
} F((4U"
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堆排序： An0GPhC
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package org.rut.util.algorithm.support; cm+P]8o%{
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import org.rut.util.algorithm.SortUtil; b7ZSPXV
NwfVL4Xg
/** sa8Vvzvo.
* @author treeroot X5w$4Kj&4l
* @since 2006-2-2 Zj Z^_X3
* @version 1.0 b\5F]r
*/ aDN`6[
public class HeapSort implements SortUtil.Sort{ 3$ PV2"
TkF[x%o
/* (non-Javadoc) bW:!5"_{H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IAyp2
*/ \ 6MCxh6
public void sort(int[] data) { .X;K%J2
MaxHeap h=new MaxHeap(); "uf%iJ:%
h.init(data); *=xr-!MEk
for(int i=0;i h.remove(); _','9|
System.arraycopy(h.queue,1,data,0,data.length); {\\Tgs
} U%/+B]6jP
-ze J#B)C
private static class MaxHeap{ R^e'}+Z
K.yb ^dg5
void init(int[] data){ 23jwAsSo
this.queue=new int[data.length+1]; OcO3v'&
for(int i=0;i queue[++size]=data; iJ|uvPCE
fixUp(size); Y|/ 8up
} VS|2|n1<6
} DIUjn;>k8
o,wUc"CE
private int size=0; 7mfS*aCb
'E.w=7z&
private int[] queue; N)Z?Z+}h
EBmt9S
public int get() { nT)vNWT=
return queue[1]; EEL,^3KR
} iam1V)V
LXCx~;{\
public void remove() { {7pli{`
SortUtil.swap(queue,1,size--); D3K8F@d
fixDown(1); <\S:'g"(
} W!(LF7_!
file://fixdown "^iYLQOC
private void fixDown(int k) { &Hnz8Or!
int j; FE;x8(;W8
while ((j = k << 1) <= size) { uvS)8-o&F
if (j < size %26amp;%26amp; queue[j] j++; E<*xx#p
if (queue[k]>queue[j]) file://不用交换 S`]k>' l
break; a-J.B.A$Z/
SortUtil.swap(queue,j,k); Yz93'HDB
k = j; J|rq*XD}q
} d<x7{?~.DK
} AT|3:]3E
private void fixUp(int k) { v(%*b,^
while (k > 1) { -H-~;EzU
int j = k >> 1; r,2g^K)6
if (queue[j]>queue[k]) rQ snhv
break; '}#9)}x!
SortUtil.swap(queue,j,k); Ef{Vp;]
k = j; UR5`ue ;
} ;xn0;V'=
} J4U1t2@)9
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} ;]:@n;c\
caX< n>
} h!9ei6
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SortUtil： dUdT7ixo
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package org.rut.util.algorithm; )Xyn q(
Yz)qcU
import org.rut.util.algorithm.support.BubbleSort; J<lO= +mg
import org.rut.util.algorithm.support.HeapSort; oe~b}:
import org.rut.util.algorithm.support.ImprovedMergeSort; q-d:TMkc
import org.rut.util.algorithm.support.ImprovedQuickSort; Y`wSv NU
import org.rut.util.algorithm.support.InsertSort; 7E!5G2XX~~
import org.rut.util.algorithm.support.MergeSort; `~q<N
import org.rut.util.algorithm.support.QuickSort; r9G>jiw8
import org.rut.util.algorithm.support.SelectionSort; L9#g)tf 8T
import org.rut.util.algorithm.support.ShellSort; jZrq{Z<
~WV"SaA)*U
/** ]')RMg zM*
* @author treeroot IV)j1
* @since 2006-2-2 jmW7)jT8:
* @version 1.0 n'6jou
*/ +X]vl=0
public class SortUtil { 7"D.L-H
public final static int INSERT = 1; )@bQu~Y
public final static int BUBBLE = 2; 3"\lu?-E
public final static int SELECTION = 3; Pj%|\kbNs
public final static int SHELL = 4; VJll
public final static int QUICK = 5; koi^l`B$
public final static int IMPROVED_QUICK = 6; ^5 Tqy(M
public final static int MERGE = 7; 63B?.
public final static int IMPROVED_MERGE = 8; A&jlizN7
public final static int HEAP = 9; E8&TO~"a]e
, ++ `=o
public static void sort(int[] data) { ufT`"i
sort(data, IMPROVED_QUICK); IIx#2r
} uY'HT|@:{
private static String[] name={ ^K@C"j?M/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ` sU/& P
}; ,$&&-p I]
@Do= k
private static Sort[] impl=new Sort[]{ ;sFF+^~L
new InsertSort(), S|+o-[e8O
new BubbleSort(), 4H]L~^CD
new SelectionSort(), |P}y,pNQ
new ShellSort(), u,4eCxYE$
new QuickSort(), nzeX[*
new ImprovedQuickSort(), JqiP>4Uwm^
new MergeSort(), wLr_-vJ
new ImprovedMergeSort(), wq`Bd
new HeapSort() }RqK84K
}; >[*qf9$
bA->{OPkT
public static String toString(int algorithm){ GR32S=\
return name[algorithm-1]; Yg1X
} !g2+w$YVa
sD wqH.L
public static void sort(int[] data, int algorithm) { lHX72s|V
impl[algorithm-1].sort(data); b;UJ 88
} Q]>.b%s[
q5:N2Jmo?z
public static interface Sort { pyvSwD5t
public void sort(int[] data); %84rL?S
} h.t-`k7
E< fVZ,
public static void swap(int[] data, int i, int j) { \)|hogI|f
int temp = data; !C:$?oU
data = data[j]; M=r)I~
data[j] = temp; 5XBH$&Td
} TRq6NB
} yz8jw:d^-