[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; 4C^;lK
} P"0S94o:5J
int i1=l; O=}4?Xv
int i2=mid+1; '~i}2e.
for(int cur=l;cur<=r;cur++){ wZVY h
if(i1==mid+1) ua1ov7w$]
data[cur]=temp[i2++]; BP2-LG&\
else if(i2>r) <va3Ly)c&
data[cur]=temp[i1++]; f3e#.jan
else if(temp[i1] data[cur]=temp[i1++]; ((A]FOIbO
else U@+ @Mc
data[cur]=temp[i2++]; uR{HCZ-
} u2 a U0k:
} (OT /o&cQ
3*$A;%q
} Uw^`_\si
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改进后的归并排序: 6_/691
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package org.rut.util.algorithm.support; {hB7F"S
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import org.rut.util.algorithm.SortUtil; y0qrl4S)v
9Vz1*4Ln
/** h)BRSs?v_D
* @author treeroot Q[^IX
* @since 2006-2-2 zCKZv|j6
* @version 1.0 {J q[N}
*/ T;jp2 #
public class ImprovedMergeSort implements SortUtil.Sort { 7''l\3mIn
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private static final int THRESHOLD = 10; Z<ozANbk
S(](C
/* $5y%\A
* (non-Javadoc) %pgie"k
* jr{C/B}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $$~x: iN
*/ !7!xJ&/V
public void sort(int[] data) { /2-S/,a
int[] temp=new int[data.length]; v!?bEM3D
mergeSort(data,temp,0,data.length-1); n'=-bj`
} (&0%![j&
8RWfv}:X
private void mergeSort(int[] data, int[] temp, int l, int r) { ;T~]|#T\6
int i, j, k; |cStN[97%
int mid = (l + r) / 2; }$3eRu +
if (l == r) K^`3Bg
return; #k8bZ?*:
if ((mid - l) >= THRESHOLD) C4],7"Sw
mergeSort(data, temp, l, mid); BL<.u
else Pcut#8?
insertSort(data, l, mid - l + 1); <y=VDb/
if ((r - mid) > THRESHOLD) `,d*>
mergeSort(data, temp, mid + 1, r); X=_pQ+j`^
else wEENN_w
insertSort(data, mid + 1, r - mid); gO%#'Eb2
,ii*[{X?
for (i = l; i <= mid; i++) { "Wr5:T-;
temp = data; c4ptY5R),
} $A"kHS7T
for (j = 1; j <= r - mid; j++) { KJ<7aZ
temp[r - j + 1] = data[j + mid]; y0cHs|8
} Twyx(~'&R
int a = temp[l]; R/r)l<X@
int b = temp[r]; 5=tvB,Ux4
for (i = l, j = r, k = l; k <= r; k++) { 3TqC.S5+
if (a < b) { By{zX,6'
data[k] = temp[i++]; A<l8CWv[
a = temp; jZeY^T)f"
} else { tGnBx)J|
data[k] = temp[j--]; #pu6^NTK
b = temp[j]; XJy~uks,
} zb.^ _A
} "OF4#a17
} !spp*Q)#\
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/** occ^bq
* @param data OQMkpX-dH
* @param l I&~kwOP
* @param i \Zz"%i
*/ 0 3fCn"
private void insertSort(int[] data, int start, int len) { exw~SvT3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JP`$A
} &C<K|F!j!
} cHOtMPyQ
} MTo<COp($
} nmZz`P9g
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堆排序： "V-k_d "
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package org.rut.util.algorithm.support; A^:[+PJHN
>Jh*S`e
import org.rut.util.algorithm.SortUtil; F8M&.TE_3
y\Kr@;q0w
/** H"czF
* @author treeroot K}"xZy Tm1
* @since 2006-2-2 KBJw7rra
* @version 1.0 XWN ra
*/ <WFA3
public class HeapSort implements SortUtil.Sort{ G n"]<8yl~
|N_tVE
/* (non-Javadoc) m3W:\LTTp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ST$~l7p
*/ g^|}e?
public void sort(int[] data) { !.1oW(
MaxHeap h=new MaxHeap(); ^Pl(V@
h.init(data); Oxs O
for(int i=0;i h.remove(); }a?PBo`
System.arraycopy(h.queue,1,data,0,data.length); D\|$!i}
} m=D2|WA8
yO*~)ALb+
private static class MaxHeap{ NRu_6~^^
i ,Cvnp6Lv
void init(int[] data){ eKjmU| H
this.queue=new int[data.length+1]; .j?`U[V%a
for(int i=0;i queue[++size]=data; %@tKcQ
fixUp(size); !>QS746S@
} HS>(y2}'
} !/]F.0
>qj.!npQD
private int size=0; M)S(:Il6Xx
z~&uLu
private int[] queue; -^sW{s0Rc
`roos<F1D
public int get() { < kyT{[e+6
return queue[1]; Zjqa n
} 3FRz&FS:j
ro|mWP0
public void remove() { -]""Jl^
SortUtil.swap(queue,1,size--); Zjis0a]v~k
fixDown(1); MMlryn||1
} kQ~2mU
file://fixdown {!!df.h
private void fixDown(int k) { E;!pK9wL|
int j; |^fubQs;2
while ((j = k << 1) <= size) { <xM$^r)
if (j < size %26amp;%26amp; queue[j] j++; DfYOGs]@
if (queue[k]>queue[j]) file://不用交换 3ARvSz@5
break; Gk_%WY*
SortUtil.swap(queue,j,k); Z]?Tx2|7
k = j; N(i%Oxp1
} q#LB 2M
} >[t0a"
private void fixUp(int k) { ^u'hl$`^
while (k > 1) { "XPBNv\>_
int j = k >> 1; $VEG1]/svp
if (queue[j]>queue[k]) _|<kKfd?
break; l-s%3E3
SortUtil.swap(queue,j,k); PPoQNW
k = j; k=;>*:D%
} p7 s#j
} 8VG6~>ux'>
^n8ioL\*i
} +m?;,JGt
&\<!{Y<'
} MJ5Ymt a
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SortUtil： MTBHFjXO
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package org.rut.util.algorithm; u.v 5!G
#,dNhUV#
import org.rut.util.algorithm.support.BubbleSort; ?%RAX CK
import org.rut.util.algorithm.support.HeapSort; be&5vl
import org.rut.util.algorithm.support.ImprovedMergeSort; L8OW@)|
import org.rut.util.algorithm.support.ImprovedQuickSort; 6Gt~tlt:L
import org.rut.util.algorithm.support.InsertSort; [zXKS|
import org.rut.util.algorithm.support.MergeSort; VnlgX\$}
import org.rut.util.algorithm.support.QuickSort; )ph**g
import org.rut.util.algorithm.support.SelectionSort; L1J \C
import org.rut.util.algorithm.support.ShellSort; /V'^$enK!}
U@t"o3E
/** Xjb 4dip
* @author treeroot 8yW8F26
* @since 2006-2-2 wyzx9`5~d
* @version 1.0 2n]UNC
*/ }YV,uJH[
public class SortUtil { !`kX</ha.
public final static int INSERT = 1; 7# >;iGuz
public final static int BUBBLE = 2; %v}SJEXFp
public final static int SELECTION = 3; ggluQGA
public final static int SHELL = 4; 2_S%vA<L
public final static int QUICK = 5; 2MT_5j5[N
public final static int IMPROVED_QUICK = 6; lT.Q)(
public final static int MERGE = 7; t<~WDI|AN
public final static int IMPROVED_MERGE = 8; y{&k`H
public final static int HEAP = 9; :~uvxiF
Yz<,`w5/6~
public static void sort(int[] data) { dA,irb I0W
sort(data, IMPROVED_QUICK); %>,B1nt
} F; upb5
private static String[] name={ zzlqj){F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JFOto,6L:
}; XKp$v']u
E`E$ }iLs
private static Sort[] impl=new Sort[]{ bBx.snBK
new InsertSort(), b:%z<vo
new BubbleSort(), fPXMp%T!
new SelectionSort(), \.0cA4)[$
new ShellSort(), TFZvZi$u&
new QuickSort(), "n<rP 3y
new ImprovedQuickSort(), 7JC^+rk
new MergeSort(), l>(w]
new ImprovedMergeSort(), )q.Z}_,)@
new HeapSort() P:~Xaz\F
}; K&L9Ue
|X}H&wBWo
public static String toString(int algorithm){ j[E8C$lW
return name[algorithm-1]; U2Uf69R
} 7CKpt.Sz6
cZ8lRVaWW
public static void sort(int[] data, int algorithm) { |\HYq`!g%7
impl[algorithm-1].sort(data); x"N{5
} g>k"R4
`2WtA_
public static interface Sort { ^Rel-=Z$B
public void sort(int[] data); VV_Zrje
} [G.4S5FX.]
0<g;g%
public static void swap(int[] data, int i, int j) { =D&xw2
int temp = data; 8`\^wG$W
data = data[j]; i|`b2msvd
data[j] = temp; O"'.n5>:`
} 24Y8n
} 8S8^sP