[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; {X!r8i
} $f$SNx)),
int i1=l; $!-yr7
int i2=mid+1; bt@< ut\
for(int cur=l;cur<=r;cur++){ <.%4 ! }f8
if(i1==mid+1) ^)470K`%)
data[cur]=temp[i2++]; m;$b'pT
else if(i2>r) +N]J5Ve-`t
data[cur]=temp[i1++]; k`cfG\;r
else if(temp[i1] data[cur]=temp[i1++]; [@_Jj3`4
else vRTkgH#4l
data[cur]=temp[i2++]; dUD[e,?
} ?=u\n;w)
} j}#w)M
"-E\[@/
} ;_XFo&@
!K#qeY}
改进后的归并排序: K$z2YJ%
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package org.rut.util.algorithm.support; f'F?MINJP
!@5 9)
import org.rut.util.algorithm.SortUtil; #QZe,"C9`
3h]g}&k
/** Mg+2. 8%
* @author treeroot \wmN
* @since 2006-2-2 M+oHtX$
* @version 1.0 X hR4ru`
*/ !OZy7
public class ImprovedMergeSort implements SortUtil.Sort { hy9\57_#
xKbXt;l2
private static final int THRESHOLD = 10; eB2a-,
2bz2KB5>
/* ??5Q)Erm1
* (non-Javadoc) S*pGMuui
* }ZYd4h|g\z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HH`'*$]7
*/ 9p85Pv [M=
public void sort(int[] data) { ]IaMp788
int[] temp=new int[data.length]; SV4E0c>
mergeSort(data,temp,0,data.length-1); .C%<P"=J4h
} 1> ?M>vK
5; C|
private void mergeSort(int[] data, int[] temp, int l, int r) { EZgwF=lO
int i, j, k; ]U?^hZ_
int mid = (l + r) / 2; H;is/
if (l == r) t[HE6ea
return; #Bze,?@
if ((mid - l) >= THRESHOLD) `6;?9NI
mergeSort(data, temp, l, mid); qfF~D0}
else AhN4mc@
insertSort(data, l, mid - l + 1); A.F%Ycq
if ((r - mid) > THRESHOLD) #&+{mCjs
mergeSort(data, temp, mid + 1, r); wKh4|Ka
else |o"?gB}Dh
insertSort(data, mid + 1, r - mid); m~BAyk^jo3
Xxj- 6i
for (i = l; i <= mid; i++) { ,O5NLg-
temp = data; !"e5h`/ADM
} =}^9 wP
for (j = 1; j <= r - mid; j++) { 4(n-_BS
temp[r - j + 1] = data[j + mid]; c2SO3g\"i
} e)IzQ7Zex
int a = temp[l]; t|?ez4/{z
int b = temp[r]; W ~<^L\Lu
for (i = l, j = r, k = l; k <= r; k++) { (y'hyJo
if (a < b) { 9yu\ Ot
data[k] = temp[i++]; Y>z>11yEB0
a = temp; YRk(u7:0
} else { },?kk1vIT{
data[k] = temp[j--]; &;6`)M{*}
b = temp[j]; ,oe <
} 2ACCh4(/P
} ;<Sd~M4f
} &3>)qul
~hH REI&
/** J(TkXNm
* @param data lgAoJ[
* @param l h8j.(
* @param i yF:1( 4
*/ Tb}4wLu
private void insertSort(int[] data, int start, int len) { OKZV{Gja
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A|[?#S((]
} FZQP%]FX
} YDsb3X<0'
} LP^$AAy
} w(Ovr`o?9t
yN0Vr\r2
堆排序： }Bh8=F3O Q
k}CVQ@nd
package org.rut.util.algorithm.support; V-P#1Kkh
,,.QfUj/&
import org.rut.util.algorithm.SortUtil; ZoqZap6e
Kn{4;Xk\
/** hag$GX'2k
* @author treeroot w"F 9l
* @since 2006-2-2 ,t744k')
* @version 1.0 539>WyG5
*/ Wb_J(!da
public class HeapSort implements SortUtil.Sort{ $Wol?)z
+E+p"7
/* (non-Javadoc) **0~K";\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \K{ z
*/ tjS@meT
public void sort(int[] data) { zk+9'r`-D
MaxHeap h=new MaxHeap(); @bLy,Xr&
h.init(data); XJB)rP
for(int i=0;i h.remove(); T{^rt3a
System.arraycopy(h.queue,1,data,0,data.length); bWS&Yk(
} 3`?7<YJ
M0"_^?
private static class MaxHeap{ #z%fx
RBd7YWo\|j
void init(int[] data){ 3M`M
this.queue=new int[data.length+1]; >6-`}G+|
for(int i=0;i queue[++size]=data; W*:.Gxv]
fixUp(size); *>}@7}f
} nFCC St$
} C.P*#_R
E]d.z6k
private int size=0; W@IQ^ }E
DCa^ u'f
private int[] queue; ]/6z; ~3U
1GRCV8"Z^
public int get() { JR|ck=tq
return queue[1]; Y@iS_lR
} ; 2#y7!
_f,C[C[e&
public void remove() { r5/0u(\LB
SortUtil.swap(queue,1,size--); ^\% (,KNo
fixDown(1); t@;p
} B[Scr5|
file://fixdown %1L,Y
private void fixDown(int k) { C) s5D
int j; UkC!1Jy
while ((j = k << 1) <= size) { vr l-$ii
if (j < size %26amp;%26amp; queue[j] j++; Or+U@vAnk
if (queue[k]>queue[j]) file://不用交换 JbbzV>
break; pv&sO~!iC
SortUtil.swap(queue,j,k); mJnIwdW*
k = j; C!!M%P
} ]6`%
} J@'wf8Ub
private void fixUp(int k) { SfyQ$$Z
while (k > 1) { F>l] 9!P|m
int j = k >> 1; !pW0qX\1n
if (queue[j]>queue[k]) zY!j:FT1HY
break; ^ tg<K
SortUtil.swap(queue,j,k); Ab"@714@
k = j; xzZ38xIhV
} &,CiM0
} P8)=Kbd
28J^DMOW
} !XCm>]R
CxG#"{&
} Z%/=|[9i
:'l^kSP_*C
SortUtil： thM4vq
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package org.rut.util.algorithm; y)!5R3b
| Aw%zw1@
import org.rut.util.algorithm.support.BubbleSort; Qq;Foa
import org.rut.util.algorithm.support.HeapSort; }$Tl ?BRpU
import org.rut.util.algorithm.support.ImprovedMergeSort; W_8wed:b
import org.rut.util.algorithm.support.ImprovedQuickSort; 8tFoN*M
import org.rut.util.algorithm.support.InsertSort; EbE-}>7OO
import org.rut.util.algorithm.support.MergeSort; MgrLSKLT
import org.rut.util.algorithm.support.QuickSort; /M4{Wc
import org.rut.util.algorithm.support.SelectionSort; T iiWp!mX
import org.rut.util.algorithm.support.ShellSort; .1Al<OLL
[t@Mn
/** Vq?p|wy
* @author treeroot ,+xB$e
* @since 2006-2-2 O-I[igNl
* @version 1.0 f;gw"onx8F
*/ T<p !5`B1
public class SortUtil { 7Vo$(kj
public final static int INSERT = 1; kB|B
public final static int BUBBLE = 2; &NK,VB;
public final static int SELECTION = 3; S4Ww5G?.
public final static int SHELL = 4; &*G#H~\
public final static int QUICK = 5; o`P%&
public final static int IMPROVED_QUICK = 6; Y M\ K%rk
public final static int MERGE = 7; zhRB,1iG
public final static int IMPROVED_MERGE = 8; _i|t Y4L
public final static int HEAP = 9; 3ojlB|Z
%<*g!y `
public static void sort(int[] data) { Y>G@0r BG
sort(data, IMPROVED_QUICK); ,TN 2
} w6GyBo{2O_
private static String[] name={ SO(NVJh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [@b&? b~K
}; iIa'2+
ve/<=IR Zo
private static Sort[] impl=new Sort[]{ IS 2^g>T#1
new InsertSort(), <_tT<5'[$u
new BubbleSort(), DSk/q-'u
new SelectionSort(), F,dx2ZPIs?
new ShellSort(), lWc:$qnR-K
new QuickSort(), )V6Hl@v
new ImprovedQuickSort(), Id|L` w
new MergeSort(), C=It* j55
new ImprovedMergeSort(), aV?@s4
new HeapSort() S.m{eur!,E
}; /bi[e9R
\LppYXz
public static String toString(int algorithm){ M)N?qRD
return name[algorithm-1]; U`d5vEhT
} 27"%"P.1
"C SC
public static void sort(int[] data, int algorithm) { [uq$5u
impl[algorithm-1].sort(data); ?$^2Umt0
} xScLVt<\e
PuT@}tw
public static interface Sort { lq&wXi
public void sort(int[] data); #Xb+`'
} &<J[Q%2
WIf0z#JMJm
public static void swap(int[] data, int i, int j) { +W\f(/q0
int temp = data; Vle@4]M\
data = data[j]; #+5pgD2C
data[j] = temp; aL%AQB,
} muZ~*kMc
} T}P".kpbS