[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; q?'gwH37
} 6 GevO3
int i1=l; YnL?t-$Gg
int i2=mid+1; SwmPP-n
for(int cur=l;cur<=r;cur++){ T"0)%k8lJ
if(i1==mid+1) . I9] `Q
data[cur]=temp[i2++]; M5bj |tQ4
else if(i2>r) 113x9+w[
data[cur]=temp[i1++]; #j~FA3O
else if(temp[i1] data[cur]=temp[i1++]; jH#^O;A
else NX#/1=
data[cur]=temp[i2++]; ;ZW}47:BS6
} >[3,qP]E
} "rlSK >`
R@{/$p:
} X9BBnZ
JV*,!5
改进后的归并排序: lDM~Z3(/b
hF%~iqd
package org.rut.util.algorithm.support; B*~Bm.
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import org.rut.util.algorithm.SortUtil; UK9MWC5g9
""KN?qh9
/** Xcpm?aTo
* @author treeroot 6}FDLBA
* @since 2006-2-2 x@RA1&c
* @version 1.0 CjukD%>sde
*/ oL/^[TXjH
public class ImprovedMergeSort implements SortUtil.Sort { XjM)/-w
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private static final int THRESHOLD = 10; E3C[o! 5
`:
/* g"AfI
* (non-Javadoc) .6A:t?.
* Pj5#G0i%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a/`Yh>ou
*/ |ssIUJ
public void sort(int[] data) { g.sV$.T2K
int[] temp=new int[data.length]; ^XB8A=xi
mergeSort(data,temp,0,data.length-1); Zkep7L
} ] ,aAzjZ
x!Y@31!Dy
private void mergeSort(int[] data, int[] temp, int l, int r) { COJ!b
int i, j, k; Rm1`D
int mid = (l + r) / 2; x;]{ 8#-z
if (l == r) 0\<-R
return; r4>I?lD
if ((mid - l) >= THRESHOLD) QKkr~?sTO
mergeSort(data, temp, l, mid); p?NjxQLA
else lTd2~_
insertSort(data, l, mid - l + 1); JF\viMfR
if ((r - mid) > THRESHOLD) 7%FZXsD
mergeSort(data, temp, mid + 1, r); e9~4wt
else s7.*o@G
insertSort(data, mid + 1, r - mid); ; SM^
13az[
for (i = l; i <= mid; i++) { YD.^\E4o
temp = data; :|mkI#P.
} :pu{3-n.
for (j = 1; j <= r - mid; j++) { %hb5C 4q
temp[r - j + 1] = data[j + mid]; RL)3k8pk
} 4'=N{.TtO
int a = temp[l]; \uPTk)oaB
int b = temp[r]; `*!>79_2C
for (i = l, j = r, k = l; k <= r; k++) { I*R$*/)
if (a < b) { Oydmq,sVe(
data[k] = temp[i++]; CXFAb1m
a = temp; oVsazYJ|?
} else { ,(=]6V
data[k] = temp[j--]; aM}"DY-_ h
b = temp[j]; vj$6
} twS3J)UH
} D8{HOv;d^
} vaZZzv{H
m =F@CA~C
/** =eLb"7C#0
* @param data E,:pIw
* @param l 9o'6es..@Z
* @param i F7l:*r,O
*/ .*7UT~o=CS
private void insertSort(int[] data, int start, int len) { OIT;fKl9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wdV?&W+
} B\&Ka<r
} u\?u4
} eV%bJkt.
} Y6PA\7Y\
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堆排序： s@iCfXU
*?"{T;4u~O
package org.rut.util.algorithm.support; <BA&S _=4
"uC*B4`
import org.rut.util.algorithm.SortUtil; K7VG\Ec
dw!Eao47
/** lhj2u]yU0S
* @author treeroot %"^XxVJ*
* @since 2006-2-2 e.^9&Fk"N
* @version 1.0 *v3 |
*/ ^eRT8I
public class HeapSort implements SortUtil.Sort{ AwrK82
wO%:WL$5
/* (non-Javadoc) _If?&KJ r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vatt9
*/ BF!zfX?n
public void sort(int[] data) { +N@F,3yNa
MaxHeap h=new MaxHeap(); I!O S&8:u
h.init(data); ~=ys~em e
for(int i=0;i h.remove(); !17Z\Ltqyj
System.arraycopy(h.queue,1,data,0,data.length); ybO,~TQ
} .Y.# d7TA
mK4|=Q
private static class MaxHeap{ jsQ$.)nO
(*BW/.Fq
void init(int[] data){ =7,UqMl_
this.queue=new int[data.length+1]; "6QMa,)D
for(int i=0;i queue[++size]=data; d]`,}vi#E9
fixUp(size); fC|u
} b15qy?`y
} S>E.*]_
$'*BS
private int size=0; r ngw6?`n-
V5r7eC
private int[] queue; i`'^ zR(`i
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public int get() { <z)G& h@
return queue[1]; ?Fpl.t~
} 18`%WUPnT
E%B Gf}h
public void remove() { SqB|(~S
SortUtil.swap(queue,1,size--); D0i30p`
fixDown(1); +Bfi/>
} }C.{+U
file://fixdown =rF8[Q0K
private void fixDown(int k) { [+z:^a1?V
int j; E ET 2|*}
while ((j = k << 1) <= size) { V p{5Kxq
if (j < size %26amp;%26amp; queue[j] j++; Y_sVe
if (queue[k]>queue[j]) file://不用交换 ]'/]j
break; yRkMR$5&
SortUtil.swap(queue,j,k); QGy=JHb
k = j; tvRy8u;
} UV.9KcN.
} 5 ZPUY
private void fixUp(int k) { x~eEaD5m%J
while (k > 1) { ppKCY4
int j = k >> 1; 1+($"$ZC&B
if (queue[j]>queue[k]) Beg5[4@
break; *rT(dp!Y
SortUtil.swap(queue,j,k); gwT,D.'Ut
k = j; V0i$"|F+E
} wP"|$HN
} p]=;t"
w}q"y+=Z:
} =:eE!
z?[DW*
} k)Wz b
F DX+
SortUtil： 2Zip8f!
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package org.rut.util.algorithm; >~~\==".
mM>|fHGA
import org.rut.util.algorithm.support.BubbleSort; 4V8wB}y7e
import org.rut.util.algorithm.support.HeapSort; pr(\?\a
import org.rut.util.algorithm.support.ImprovedMergeSort; taaAwTtk?A
import org.rut.util.algorithm.support.ImprovedQuickSort; ^^uD33@_
import org.rut.util.algorithm.support.InsertSort; +9CUnRv
import org.rut.util.algorithm.support.MergeSort; |pSoBA9U
import org.rut.util.algorithm.support.QuickSort; IoOnS)
import org.rut.util.algorithm.support.SelectionSort; !@k@7~i
import org.rut.util.algorithm.support.ShellSort; MDt?7c
c\MDOD%9
/** \-ws[
* @author treeroot V.:A'!$#
* @since 2006-2-2 )W|jt/
* @version 1.0 p>3'77 V
*/ mC(t;{
public class SortUtil { U:hC!t:
public final static int INSERT = 1; " SqKS,J
public final static int BUBBLE = 2; Y3>\;W*?
public final static int SELECTION = 3; 8Oh3iO
public final static int SHELL = 4; I3Xh[% -!
public final static int QUICK = 5; v"~I( kf$
public final static int IMPROVED_QUICK = 6; p5VSSvV\K
public final static int MERGE = 7; u_=y,~s
public final static int IMPROVED_MERGE = 8; kZ%W?#
public final static int HEAP = 9; %tQ{Hf~
>+8I =S
public static void sort(int[] data) { r0 C6Ww7u
sort(data, IMPROVED_QUICK); _\PoZ|G4y
} E,yK` mPp^
private static String[] name={ VTfaZ/e.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" REBDr;tv
}; 1G.gPx[
?ovGYzUZ
private static Sort[] impl=new Sort[]{ 1:UC\WW
new InsertSort(), JZxF)]^
new BubbleSort(), $VIq)s2az|
new SelectionSort(), I]1Hi?A2
new ShellSort(), |9$'?4F
new QuickSort(), 5V8C+k)
new ImprovedQuickSort(), :9#{p^:o
new MergeSort(), l?_!eA
new ImprovedMergeSort(), :=v{inN
new HeapSort() #q.G_-H4J@
}; 6*33k'=;F
_O9H._E
public static String toString(int algorithm){ ^|(4j_.(e
return name[algorithm-1]; ~ O=|v/]
} )^f Q@C8
R9G)X]
public static void sort(int[] data, int algorithm) { s/H"Ab
impl[algorithm-1].sort(data); 3eP0v
} W+C_=7_
8;&S9'ci
public static interface Sort { {bqKb=nyZ
public void sort(int[] data); x]cZm^
} 8lSn*;S,
/C2f;h(1
public static void swap(int[] data, int i, int j) { WTs[Sud/
int temp = data; G11.6]?Gg
data = data[j]; _x1[$A,GuB
data[j] = temp; Al=? j#J6p
} y@\Q@ 9
} ?QT"sj64w