[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; lrrTeE*
} *G"hjc$L
int i1=l; di\.*7l?
int i2=mid+1; }7PJr/IuF
for(int cur=l;cur<=r;cur++){ ;,y_^-h;
if(i1==mid+1) 1+%UZK= K
data[cur]=temp[i2++]; .k#PrT1C
else if(i2>r) y?sz&*:
data[cur]=temp[i1++]; ZCCCuB
else if(temp[i1] data[cur]=temp[i1++]; dc$zW^i
else \f,<\mJ#
data[cur]=temp[i2++]; }8'_M/u\
} LkbD='\=
} ]TvMT
j.M]F/j
} 757&bH|a
l)r\SE1
改进后的归并排序: y-pdAkDh
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package org.rut.util.algorithm.support; 01(U)F\
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import org.rut.util.algorithm.SortUtil; uQ=u@qtp
Ar-Vu{`
/** k>i88^kPV
* @author treeroot S|tD8A
* @since 2006-2-2 3M#x)cW
* @version 1.0 "&_+!TBg,
*/ HT7,B(.}
public class ImprovedMergeSort implements SortUtil.Sort { 1wgL^Qz@
v.ZUYa|
private static final int THRESHOLD = 10; GRc)3 2,
L15)+^4n
/* \`.v8C>vG
* (non-Javadoc) &r,vD,
* EU(e5vO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C(>!?-.
*/ [8u9q.IZ
public void sort(int[] data) { f2.=1)u.
int[] temp=new int[data.length]; 2Z; !N37U
mergeSort(data,temp,0,data.length-1); "P7OD^(x/
} 9Og
3MQHoxX
private void mergeSort(int[] data, int[] temp, int l, int r) { WUS%4LL(
int i, j, k; yLRe'5#m
int mid = (l + r) / 2; 0>[]Da}
if (l == r) T m"B
return; b>5*G1
if ((mid - l) >= THRESHOLD) D;sG9Hky
mergeSort(data, temp, l, mid); 0hY3vBQ!
else yp~z-aRa
insertSort(data, l, mid - l + 1); ~n -N
if ((r - mid) > THRESHOLD) gmp@ TY=:L
mergeSort(data, temp, mid + 1, r); @tT`s^e
else ru:"c^W:[
insertSort(data, mid + 1, r - mid); G[}v?RLI
mJ%^`mrI
for (i = l; i <= mid; i++) { <*vR_?!
temp = data; &D<6Go/)_*
} >p&"X 2 @
for (j = 1; j <= r - mid; j++) { VjM/'V5
temp[r - j + 1] = data[j + mid]; JCH9~n.
} UV(`.
int a = temp[l]; x@X2r
int b = temp[r]; h<L_ =)lH
for (i = l, j = r, k = l; k <= r; k++) { a>C;HO
if (a < b) { :@(1~Hm
data[k] = temp[i++]; 6TRLHL~B
a = temp; 2UQF:R?LQ
} else { Zx8$M5
data[k] = temp[j--]; iKq_s5|sW
b = temp[j]; "yymnIQ3u
} (jKqwVs.:
} 8B ,S_0!
} G!%m~+",
"9s}1C;Me
/** x~k3kj
* @param data ESviWCh0Fl
* @param l JbEEI(Q>g
* @param i c,#=In2
*/ eNfH9l2k
private void insertSort(int[] data, int start, int len) { 5H'Iul<Os
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,b^Y8_ltoT
} 5]mH.{$x$?
} HRTNIx
} Qfp4}a=
} ^5Y<evjm
7(5d$W
堆排序： ]prw=rD
E2l"e?AN~
package org.rut.util.algorithm.support; WiH8j$;xu
y%|Ez
import org.rut.util.algorithm.SortUtil; aP(~l_
aGWO3Nk
/** N?3p,2
* @author treeroot !UT!PX)
* @since 2006-2-2 2V8"jc
* @version 1.0 e O~p"d-|
*/ Ju5Dd\
public class HeapSort implements SortUtil.Sort{ EFiVwH
$Ptl&0MN%
/* (non-Javadoc) gHgqElr(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C{U*{0}
*/ '`tFZfT
public void sort(int[] data) { ty[%:eG#
MaxHeap h=new MaxHeap(); Ud"_[JtGM
h.init(data); <|'ETqP<+
for(int i=0;i h.remove(); mR2"dq;U
System.arraycopy(h.queue,1,data,0,data.length); #Br`;hL<T
} ZYB5s~;eB"
Gy+c/gK
private static class MaxHeap{ f2tCB1[D+
+%<kcc3
void init(int[] data){ ZK?V{X{";
this.queue=new int[data.length+1]; |5(CzXR]
for(int i=0;i queue[++size]=data; Lww&[|k.
fixUp(size); ,aWI&ve6
} %-YWn`yEm
} G;u 6p
3]iw3M
private int size=0; f7zB_hVDmE
V(XU^}b#
private int[] queue; g[y&GCKY!=
Ce//;Op
public int get() { @@a#DjE%/
return queue[1]; Bd*Ok]
} ^69(V LK
TN Z-0
public void remove() { Y8}y0]V
SortUtil.swap(queue,1,size--); 9k4z__Ke
fixDown(1); p Dg!Cs
} io"NqR#"v
file://fixdown XiV*d06{
private void fixDown(int k) { J*ofa>
int j; lX.1B&T9Lr
while ((j = k << 1) <= size) { |-v/
if (j < size %26amp;%26amp; queue[j] j++; UU}Hs}
if (queue[k]>queue[j]) file://不用交换 A?-t`J
break; d:Z|It
SortUtil.swap(queue,j,k); )-XD= ]
k = j; 8xj_)=(sV!
} )4ok@^.
} { zL4dJw
private void fixUp(int k) { F:Vl\YZ
while (k > 1) { , iEGf-!k
int j = k >> 1; 8~!h8bkC
if (queue[j]>queue[k]) f&F9ImZ
break; >y}> 5kv
SortUtil.swap(queue,j,k); 7u1o>a%9
k = j; hQ)?LPUB
} Yjy%MR
} |Eu#mN
Q(WfWifu-|
} 'mv|6Y
_x-2tnIxXv
} D41.$t[
}WR@%)7ay
SortUtil： ~urk Uz
;Srzka2
package org.rut.util.algorithm; e*<pO@Uy
nbw8YO(=
import org.rut.util.algorithm.support.BubbleSort; t[({KbIy
import org.rut.util.algorithm.support.HeapSort; ?<OE|nb&
import org.rut.util.algorithm.support.ImprovedMergeSort; p-oEoA
import org.rut.util.algorithm.support.ImprovedQuickSort; D1]?f`
import org.rut.util.algorithm.support.InsertSort; 8XfOMf~d`
import org.rut.util.algorithm.support.MergeSort; svCm}`
import org.rut.util.algorithm.support.QuickSort; EAs^i+/
import org.rut.util.algorithm.support.SelectionSort; RR`\q>|
import org.rut.util.algorithm.support.ShellSort; zYis~+
D.F1^9Q
/** 3ug>,1:6-
* @author treeroot 1[Q~&QC
* @since 2006-2-2 W$}2 $}r0U
* @version 1.0 9y\Ik/
*/ UOe@R|79q
public class SortUtil { M(} T\R
public final static int INSERT = 1; +>tSO!}[
public final static int BUBBLE = 2; ,]@Sytky
public final static int SELECTION = 3; t,~feW,
public final static int SHELL = 4; Ch=jt*0
public final static int QUICK = 5; +nYF9z2
public final static int IMPROVED_QUICK = 6; 47&p*=
public final static int MERGE = 7; | m#"
public final static int IMPROVED_MERGE = 8; uE#"wm'J
public final static int HEAP = 9; 0LWV.OIIC
PywUPsJ
public static void sort(int[] data) { [7{cf`C
sort(data, IMPROVED_QUICK); <UW-fI)X
} n2opy8J#!
private static String[] name={ tB0f+ wC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SphP@J<ONW
}; w\JTMS$
&61h*s
private static Sort[] impl=new Sort[]{ -9 |)O:
new InsertSort(), 4?`*#DPl
new BubbleSort(), @Y%i`}T%(
new SelectionSort(), p13y`sU=
new ShellSort(), [xDn=)`{V
new QuickSort(), C7l4X8\w
new ImprovedQuickSort(), }F_=.w0
new MergeSort(), )uCa]IR
new ImprovedMergeSort(), @Bsvk9}
new HeapSort() J32"Ytdo<
}; RHI?_gf&
y<ZT~e
public static String toString(int algorithm){ ur+\!y7^R
return name[algorithm-1]; Z(ToemF)hi
} <@c9S,@t
qwuA[QkPi
public static void sort(int[] data, int algorithm) { No'Th7=|S
impl[algorithm-1].sort(data); xy^z_`
} kc[<5^b5
q$B|a5a?
public static interface Sort { pQCW6X
public void sort(int[] data); _o6Zj1p
} ib(4Y%U6~
7] >z e
public static void swap(int[] data, int i, int j) { K!tM "`a
int temp = data; 5BMrn0
data = data[j]; ;C5 J^xHI
data[j] = temp; ](k}B*Abh
} kI~;'M
} ?2S<D5MSb