[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; eHfG;NsV/
} GFSlYG
int i1=l; Jv '3](
int i2=mid+1; Fj4l %=
for(int cur=l;cur<=r;cur++){ 8=!rnJCav
if(i1==mid+1) mH7CgI
data[cur]=temp[i2++]; fJ|Bu("N
else if(i2>r) 3"2<T^H]
data[cur]=temp[i1++]; n]kQtjJ
else if(temp[i1] data[cur]=temp[i1++]; fS8XuT
else _ d(Ks9
data[cur]=temp[i2++]; 9OO0Ht4j
} i75?*ld
} `"^@[1
=PeW$q+
} N7Z(lI|a;
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改进后的归并排序: Huug_E+
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package org.rut.util.algorithm.support; J%O[@jX1
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import org.rut.util.algorithm.SortUtil; W}<M?b4tP
"OlI-^y
/** ys~p(
* @author treeroot NUxAv= xl
* @since 2006-2-2 .wt>.mUH
* @version 1.0 XQ+-+CD
*/ @hz0:ezg:
public class ImprovedMergeSort implements SortUtil.Sort { _mI:Lr#dT
Y`[HjS,
private static final int THRESHOLD = 10; (<AM+|
{ 8|Z}?I
/* _Oaso >
* (non-Javadoc) ZQJw2LAgO
* !pFKC)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4IGQ,RTB
*/ HC<BGIgL
public void sort(int[] data) { \|b1s @c8
int[] temp=new int[data.length]; M25z<Y
mergeSort(data,temp,0,data.length-1); f0fqDmn
} XyKKD&j
l yLK$B?/
private void mergeSort(int[] data, int[] temp, int l, int r) { s K$Sar
int i, j, k; D3ZT''
int mid = (l + r) / 2; iX9[Q0g=oQ
if (l == r) "cz]bCr8
return; ^0BF2&Zx
if ((mid - l) >= THRESHOLD) jT wM<?
mergeSort(data, temp, l, mid); d/-]y:`f`
else h>`'\qy
insertSort(data, l, mid - l + 1); ~n]2)>6
if ((r - mid) > THRESHOLD) KWZNu&)
mergeSort(data, temp, mid + 1, r); 8t^;O!
else +'YSpJ
insertSort(data, mid + 1, r - mid); ZCOuv6V+
;MdK3c
for (i = l; i <= mid; i++) { q}7Df!<|
temp = data; e4NX\tCpw
} %lqG*dRx0
for (j = 1; j <= r - mid; j++) { X G@>1/
temp[r - j + 1] = data[j + mid]; pN^G[
} aGzdur
int a = temp[l]; VHXR)}
int b = temp[r]; $4ZDT]n
for (i = l, j = r, k = l; k <= r; k++) { #\!hBL @b
if (a < b) { "l2N_xX;
data[k] = temp[i++]; [7Kj$PB3
a = temp; gWU(uBS
} else { 5GWM )vrZg
data[k] = temp[j--]; 3\U,Kg
b = temp[j]; ?U.&7yY
} Bbe/w#Z
} y0mg}N1
} *MyS7<
vng8{Mx90*
/** >=q!!'$:
* @param data 6[Pr<4J
* @param l M$-(4 0
* @param i yKk,);
*/ G4`sRaT.
private void insertSort(int[] data, int start, int len) { /Z9`uK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `efH(
} hcqmjqJ
} %+OPas8C
} cK}
} 6;=wuoJi
mYs->mg1
堆排序： MsiC!j.-
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package org.rut.util.algorithm.support; |(8Hk@\CT>
)bN3-_
import org.rut.util.algorithm.SortUtil; cd%g]T)#1
4>tYMyLt0
/** $!3t$-TSD
* @author treeroot <?va) ou
* @since 2006-2-2 L5N{ie_
* @version 1.0 e^fKatI1
*/ $A!h=]
public class HeapSort implements SortUtil.Sort{ v(nQd6;T
}T*xT>p^3
/* (non-Javadoc) W;@ae,^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R8W44I*R:
*/ l$_+WC*wp
public void sort(int[] data) { l?<z1Acd&
MaxHeap h=new MaxHeap(); z{M,2
h.init(data); g1!L. On
for(int i=0;i h.remove(); 9p'J(`
System.arraycopy(h.queue,1,data,0,data.length); ny?m&;^r:
} IF?B`TmZ
3*23+}^G
private static class MaxHeap{ 7~9f rW<K
*gpD4c7A\
void init(int[] data){ ,ce^"yG
this.queue=new int[data.length+1]; MldL"*HW:
for(int i=0;i queue[++size]=data; \iE9&3Ie
fixUp(size); tS\NO@E_Jh
} YbBH6RZr
} \ rWgA
9PfU'm|h
private int size=0; 1kw4'#J8
(c|qX-%rC
private int[] queue; O)Dw<j)
$U.'K!B
public int get() { ~acK$.#
return queue[1]; B91PlM.
} G+^$JN=
|Ie`L("
public void remove() { ?{P6AF-xcf
SortUtil.swap(queue,1,size--); KcF+!;:
fixDown(1); Q3{&'|}^2
} e(% Solkm?
file://fixdown 1Moh`
private void fixDown(int k) { ,%G2>PBt
int j; LsZ!':LN
while ((j = k << 1) <= size) { 3kQ8*S
if (j < size %26amp;%26amp; queue[j] j++; X35U!1Y\
if (queue[k]>queue[j]) file://不用交换 29DWRJU
break; l5nDt$Ex
SortUtil.swap(queue,j,k); 05LQh
k = j; [)0k}
} +7OT`e %q
} exKmK!FT
private void fixUp(int k) { 4'b]2Mn3
while (k > 1) { 0BD((oNg
int j = k >> 1; (SVr>|Db
if (queue[j]>queue[k]) 9+Hb`
break; ~*]`XL.-
SortUtil.swap(queue,j,k); tBUQf*B
k = j; t"vO&+x
} Z6@J-<u
} 'yjH~F.
!#s7 F
} O +}EE^*a
Rw8m5U
} Q31c@t
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SortUtil： 9yAu<a
1Sk6[h'CL
package org.rut.util.algorithm; r@UY$z
M.^A`
import org.rut.util.algorithm.support.BubbleSort; `bF;Ew;
import org.rut.util.algorithm.support.HeapSort; =_6h{f&Q
import org.rut.util.algorithm.support.ImprovedMergeSort; ?O Nw*"9
import org.rut.util.algorithm.support.ImprovedQuickSort; y.<Y]m
import org.rut.util.algorithm.support.InsertSort; 9?,.zc^
import org.rut.util.algorithm.support.MergeSort; z5'nS&x
import org.rut.util.algorithm.support.QuickSort; Z-!T(:E]
import org.rut.util.algorithm.support.SelectionSort; [&s:x,
import org.rut.util.algorithm.support.ShellSort; ; O0rt1
wcT6d?*5
/** 6+#cyKj
* @author treeroot ' uw&f;/E
* @since 2006-2-2 ;CBdp-BUj
* @version 1.0 `I{Q,HQ7
*/ c)fp;^
public class SortUtil { a/#,Y<kJ
public final static int INSERT = 1; 0Ch._~Q+20
public final static int BUBBLE = 2; V3UGx'@^y
public final static int SELECTION = 3; B`EgL/Wg[
public final static int SHELL = 4; uNBhVsM6<
public final static int QUICK = 5; dF]8>jBOL
public final static int IMPROVED_QUICK = 6; N)Kr4GC
public final static int MERGE = 7; @ xr
public final static int IMPROVED_MERGE = 8; 4 Z)]Cq*3
public final static int HEAP = 9; U# B
R/|{?:r?:x
public static void sort(int[] data) { ^`?> Huu<w
sort(data, IMPROVED_QUICK); HE'8
} y@JYkp>I
private static String[] name={ XjU;oh4:.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1]`HX=cl
}; k@U`?7X
[nD4\x+
private static Sort[] impl=new Sort[]{ XePBA J
new InsertSort(), 9%6`ZS~3
new BubbleSort(), X jN.X
new SelectionSort(), Q6>( Z
new ShellSort(), 5Vqvb|
new QuickSort(), zxdO3I
new ImprovedQuickSort(), Jl ?Q}SB
new MergeSort(), KL`>mJo$
new ImprovedMergeSort(), bf(&N-"A
new HeapSort() tYa8I/HpT
}; 0MPDD%TP
0yNlf-O
public static String toString(int algorithm){ 2jC\yY |PN
return name[algorithm-1]; WE]^w3n9
} yG4MqR)J
JqZ5DjI:
public static void sort(int[] data, int algorithm) { "Fiv ]^
impl[algorithm-1].sort(data); lsi8?91
} &0`7_g7G
`_i-BdW
public static interface Sort { JY16|ia
public void sort(int[] data); `_`,XkpzCJ
} ic#drpl,
@eWx4bl
public static void swap(int[] data, int i, int j) { i-b7
int temp = data; XU7bWafy
data = data[j]; >m!.l{*j>N
data[j] = temp; Wz]S+IpY
} &@-glF5
} K e8cfd~c