[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; z+PSx'#}
} Hi,_qlc+
int i1=l; m ~fqZK
int i2=mid+1; y<BiR@%,7
for(int cur=l;cur<=r;cur++){ A{x&5yX8
if(i1==mid+1) q,aWF5m@
data[cur]=temp[i2++]; +**H7: bO
else if(i2>r) ^T(l3r
data[cur]=temp[i1++]; 9^v|~f
else if(temp[i1] data[cur]=temp[i1++]; "Z&qOQg%3
else ;L(W'+
data[cur]=temp[i2++]; ?7^('
} 7fI[yCh
} kzJNdYtdH
6}C4 SZ
} U+@yx>!
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改进后的归并排序: eJ'2CM6
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package org.rut.util.algorithm.support; mC>7l7%
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import org.rut.util.algorithm.SortUtil; UQ'D-eK
|oSyyDYWP
/** FLEf(
* @author treeroot U QXT&w
* @since 2006-2-2 .X_k[l9
* @version 1.0 7<IrN\@U
*/ bxkp9o
public class ImprovedMergeSort implements SortUtil.Sort { 1'c!9
{(D$Xb
private static final int THRESHOLD = 10; X]C-y,r[M
kul&m|
/* 6by5VESx
* (non-Javadoc) lCWk)m8
* =<`9T_S 16
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dMeDQ`c`W
*/ */nb%QV
public void sort(int[] data) { hrU.QF8
int[] temp=new int[data.length]; ;fee<7Ty
mergeSort(data,temp,0,data.length-1); b'Mg
} &1]}^/u2
% eW>IN]5
private void mergeSort(int[] data, int[] temp, int l, int r) { YXrTm[P
int i, j, k; 0x[vB5R
int mid = (l + r) / 2; t.lm`=
if (l == r) J24UUZ9&$
return; H&mw!=FV0
if ((mid - l) >= THRESHOLD) ReZ|q5*
mergeSort(data, temp, l, mid); J^n(WnM*F
else J%j#gyTU
insertSort(data, l, mid - l + 1); 0@*rp7
if ((r - mid) > THRESHOLD) 72~)bu
mergeSort(data, temp, mid + 1, r); 4xtbP\=
else }k\a~<'X
insertSort(data, mid + 1, r - mid); U>:CX XHRt
G!XizhE
for (i = l; i <= mid; i++) { #jA|04w
temp = data; |5e/.T$
} -$dnUXFsj[
for (j = 1; j <= r - mid; j++) { NZ7a^xT_)
temp[r - j + 1] = data[j + mid]; `+1*)bYxU
} S@N&W&W#~
int a = temp[l]; l:j9lBS
int b = temp[r]; [ {lF1+];@
for (i = l, j = r, k = l; k <= r; k++) { {s=QwZdR
if (a < b) { aina6@S
data[k] = temp[i++]; )l[ +7
a = temp; UbY-)9==
} else { JY9Hqf
data[k] = temp[j--]; e#FaK^V
b = temp[j]; j#-ZL-N
} -a&wOn-W
} <gf:QX!
} <^n9?[m*
\&@Tq-o
/** #^!oP$>1
* @param data RX?Nv4-
* @param l Zp- Av8
* @param i 9e=F
*/ $qg5m,1?
private void insertSort(int[] data, int start, int len) { d/Zt}{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p7zHP
} Mgcq'{[~Y=
} V)!Oss;i
} =!{}:An1$
} UupQ*,dJ
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堆排序： !*C^gIQGU
8 l}tYl`|
package org.rut.util.algorithm.support; | 2p\M?@
8{%/!ylJz
import org.rut.util.algorithm.SortUtil; N7+K$)3
0)k%nIhj
/** 4?jhZLBU
* @author treeroot 1m}'Y@I
* @since 2006-2-2 rZ:
* @version 1.0 &rcr])jg[
*/ W 86S)+h
public class HeapSort implements SortUtil.Sort{ 'qQDM_+
9XobTi3+'
/* (non-Javadoc) ?D57HCd`n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \m5:~,p=
*/ <C# s0UX
public void sort(int[] data) { 1PLKcU
MaxHeap h=new MaxHeap(); I>L lc Y
h.init(data); jqb,^T|j;m
for(int i=0;i h.remove(); Zu&trxnNf[
System.arraycopy(h.queue,1,data,0,data.length); xhg{!w
} d@,q6R}!MP
U:_T9!fG
private static class MaxHeap{ 9dqD(S#C;"
2=F_<Jh|+
void init(int[] data){ I?bL4u$\
this.queue=new int[data.length+1]; Yk?uxZ4)H
for(int i=0;i queue[++size]=data; e!eWwC9u
fixUp(size); rLh490@
} cX*
} "pMXTRb
la|#SS95
private int size=0; u+8_et5T
3,N7Nfe
private int[] queue; >tib21*
!l.Rv_o<O
public int get() { K# _plpr
return queue[1]; z_A%>E4
} WYEvW<Hv
8'`&f&
public void remove() { Vk0O^o
SortUtil.swap(queue,1,size--); cf0em!
fixDown(1); FCqs'
} Oo rH
file://fixdown r8^1JJ~\
private void fixDown(int k) { 7@+0E2'
int j; s_D7?o
while ((j = k << 1) <= size) { g6 7*Bs
if (j < size %26amp;%26amp; queue[j] j++; 'Nfg%)-N
if (queue[k]>queue[j]) file://不用交换 1D=My1B
break; I0Wn?Qq=@
SortUtil.swap(queue,j,k); Haq23K
k = j; eUF PzioW
} 1REq.%/=
} Gp32\^H|<
private void fixUp(int k) { 2z )h,<D
while (k > 1) { _@?]!J[
int j = k >> 1; w:z_EV!&
if (queue[j]>queue[k]) r'xa'6&
break; -J? df
SortUtil.swap(queue,j,k); f4@Dn >BJ
k = j; {a%T <WW
} BtU,1`El5
} El"XF?OgpP
DU}q4u@)
} M7jDV|Go
R8":1 #&
} c!w4N5aM
:*}tkr4&eh
SortUtil： ~a/yLI"'g
!B-&I E?
package org.rut.util.algorithm; `DWzp5Ax
AbcLHV.
import org.rut.util.algorithm.support.BubbleSort; bs_I{bCu?
import org.rut.util.algorithm.support.HeapSort; Hb!Q}V+Kb8
import org.rut.util.algorithm.support.ImprovedMergeSort; 2uiiTg>
import org.rut.util.algorithm.support.ImprovedQuickSort; ;&JMBn]J
import org.rut.util.algorithm.support.InsertSort; J8/>b{Y
import org.rut.util.algorithm.support.MergeSort; H(?z?2b p
import org.rut.util.algorithm.support.QuickSort; nM R_ ?g
import org.rut.util.algorithm.support.SelectionSort; !aLByMA
import org.rut.util.algorithm.support.ShellSort; \ZCc~muR
$t}L|"=8X
/** ap;*qiNFQ
* @author treeroot <`6-J `.
* @since 2006-2-2 pjbKMx
* @version 1.0 _|*3uGo:
*/ J fsCkS
public class SortUtil { !H?#~{ W}
public final static int INSERT = 1; jZm1.{[>
public final static int BUBBLE = 2; cC4*4bMm
public final static int SELECTION = 3; 5%tIAbGW
public final static int SHELL = 4; nwO;>Qr
public final static int QUICK = 5; ckhW?T>l
public final static int IMPROVED_QUICK = 6; tk1qgjE(?
public final static int MERGE = 7; +twBFhS7k
public final static int IMPROVED_MERGE = 8; ?+`Zef.g
public final static int HEAP = 9; {yspNyOx
/\#qz.c2K
public static void sort(int[] data) { N;Hf7K
sort(data, IMPROVED_QUICK); 1*>a
} .HGEddcC
private static String[] name={ hQ<"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w9.r`_-
}; Zu~ #d)l3N
We9C9)0
private static Sort[] impl=new Sort[]{ -*?a*q/#nQ
new InsertSort(), ,$}v_-:[l
new BubbleSort(), go{'mX)}u
new SelectionSort(), u\=Nu4)Z F
new ShellSort(), 7F+w o
new QuickSort(), = @ph
new ImprovedQuickSort(), TioI$?l>W(
new MergeSort(), N'2u`br4KP
new ImprovedMergeSort(), tYmWze.j
new HeapSort() A!iV iX &y
}; Q6}`%
of{wZU\J+9
public static String toString(int algorithm){ 8?I(wn
return name[algorithm-1]; Q&n
} `' 6]Z*
B;7L:
public static void sort(int[] data, int algorithm) { 299; N
impl[algorithm-1].sort(data); 7NJ1cQ-}t
} j g$%WAEb
NSM-p.I9
public static interface Sort { tLV9b %i(
public void sort(int[] data); yt_?4Hc"
} o{zo-:>Jp
p|AIz3
public static void swap(int[] data, int i, int j) { S'TF7u
int temp = data; A"S})
data = data[j]; 7CwG(c/5
data[j] = temp; M[TgNWl/[
} ;Iv)J|*
} ,ci tzh