[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; M_ %-A
} ug ;Xoh5w
int i1=l; 0^uUt-
int i2=mid+1; ysIhUpd
for(int cur=l;cur<=r;cur++){ aHpZhR|f$
if(i1==mid+1) m26YAcip}
data[cur]=temp[i2++]; +>!nqp
else if(i2>r) \$Wpt#V
data[cur]=temp[i1++]; u?dPCgs;h
else if(temp[i1] data[cur]=temp[i1++]; U887@-!3
else 3Xd:LDZ{
data[cur]=temp[i2++]; 3Z*o5@RI
} AL3iNkEa
} J9]cs?`)
<anKw|
} -40X3
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改进后的归并排序: Is}kCf
dr=Q9%
package org.rut.util.algorithm.support; >&S}u\/
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import org.rut.util.algorithm.SortUtil; YkB@fTTS
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/** KHHYk>FR
* @author treeroot t$Rc 0
* @since 2006-2-2 xt,Qn460;
* @version 1.0 -mRgB"8
*/ VlA]A,P}i
public class ImprovedMergeSort implements SortUtil.Sort { ;zD4#7=
>Q=^X3to
private static final int THRESHOLD = 10; Q#H"Se
w0=
/* \#dacQ2E@
* (non-Javadoc) jLVD37 P^
* ]T]{VB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^&1O:G*"
*/ &U|c=$!\
public void sort(int[] data) { !vRZh('R
int[] temp=new int[data.length]; b- t
mergeSort(data,temp,0,data.length-1); f?k0(rl
} h L [eA
q: FhuOP
private void mergeSort(int[] data, int[] temp, int l, int r) { FV "pJ
int i, j, k; (M$>*O3SR
int mid = (l + r) / 2; c6 mS
if (l == r) -X$EE$:
return; h`1<+1J9
if ((mid - l) >= THRESHOLD) Fl=H5HR
mergeSort(data, temp, l, mid); UiH7
else h^tCF=S
insertSort(data, l, mid - l + 1); a6DR' BC
if ((r - mid) > THRESHOLD) xLoQ0rt 6
mergeSort(data, temp, mid + 1, r); X7L:cVBg
else [I4MK%YQ
insertSort(data, mid + 1, r - mid); ~d]v{<3
SU~.baP?
for (i = l; i <= mid; i++) { ~i%=1&K&`
temp = data; QWfSm^ t
} <O'U-. Gc
for (j = 1; j <= r - mid; j++) { >rEZ$h
temp[r - j + 1] = data[j + mid]; naf ~#==vc
} ySO\9#Ho
int a = temp[l]; 9c)#j&2?H
int b = temp[r]; ;n(f?RO3X
for (i = l, j = r, k = l; k <= r; k++) { Fk3(( n=
if (a < b) { A<)n H=G&
data[k] = temp[i++]; EyPJ Jc8
a = temp; NC-K`)
} else { JXU?'@QY
data[k] = temp[j--]; ,k4pW&A
b = temp[j]; oxc;DfJ_
} PJN9[Y{^3
} B1nm?E 0i
} P1LOj
{j>a_]dTVX
/** BM /FOY;
* @param data z&d.YO_W
* @param l VrZfjpV
* @param i ^*.$@M
*/ 23^>#b7st
private void insertSort(int[] data, int start, int len) { VM\R-[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "E2 0Y"[h
} Q+ V<&
} u)r/#fUZ
} 4joE"H6
} @s-P!uCaT
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堆排序： zT,@PIC(
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package org.rut.util.algorithm.support; OmWEa
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import org.rut.util.algorithm.SortUtil; K)LoZ^x0)
3i!a\N4 K
/** `X@\Zv=}
* @author treeroot d|NW&PG
* @since 2006-2-2 ,6g{-r-2
* @version 1.0 %[*-aA
*/ 0@zJa;z'
public class HeapSort implements SortUtil.Sort{ ?(=|!`IoO
:gwmk9LZ
/* (non-Javadoc) KZ7B2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?tjEXg>ny
*/ z U[pn)pe
public void sort(int[] data) { -@w,tbc$
MaxHeap h=new MaxHeap(); :V+rC]0
h.init(data); }/1^Lqfnz
for(int i=0;i h.remove(); GE!nf6>Km
System.arraycopy(h.queue,1,data,0,data.length); *%;A85V/
} u$aK19K/
La1:WYt
private static class MaxHeap{ |cY HH$
%;:![?M
void init(int[] data){ .2JZ7
this.queue=new int[data.length+1]; }NC$Ce
for(int i=0;i queue[++size]=data; cDz@3So.b
fixUp(size); n?r8ZDJ'
} pwfQqPC#_
} }5vKQf
4%r?(C0x
private int size=0; vm+3!s:u
C<^i`[&P$
private int[] queue; mnM]@8^G
)?[7}(4jI
public int get() { c2g[w;0"
return queue[1]; " C0[JdZ
} ON\bD?(VY
$EFS_*<X
public void remove() { ek]JzD~w$
SortUtil.swap(queue,1,size--); #h=V@Dh
fixDown(1); HU?1>}4L
} j13-?fQ&
file://fixdown mU4(MjP?
private void fixDown(int k) { )4uWB2ZRoi
int j; A2ye ^<-C.
while ((j = k << 1) <= size) { BGibBF^
if (j < size %26amp;%26amp; queue[j] j++; H I|a88
if (queue[k]>queue[j]) file://不用交换 a8T9=KY^
break; cOP'ql{"
SortUtil.swap(queue,j,k); e#HPU
k = j; =A6*;T"W
} A_@..hX(
} ?Sh]kJO
private void fixUp(int k) { i_*yS+Z;
while (k > 1) { )'n@A%B
int j = k >> 1; rogy`mh\r2
if (queue[j]>queue[k]) 5"nq h}5
break; jnp~ACN,
SortUtil.swap(queue,j,k); W'vekuM
k = j; $||WI}k3V
} p4z4[=-:
} y p{Dl
}>@SyE'Q
} y60aJ)rAX
3<XuJ1V&
} QO;Dyef7b
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SortUtil： m@+v6&,
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package org.rut.util.algorithm; FA-cTF[,(
xbCR4upS
import org.rut.util.algorithm.support.BubbleSort; ||X3g"2W9
import org.rut.util.algorithm.support.HeapSort; kBk>1jn"
import org.rut.util.algorithm.support.ImprovedMergeSort; s*gqKQ;
import org.rut.util.algorithm.support.ImprovedQuickSort; HQ"T>xb
import org.rut.util.algorithm.support.InsertSort; h!SsIy(
import org.rut.util.algorithm.support.MergeSort; u $-&Im<
import org.rut.util.algorithm.support.QuickSort; 2EM6k|l5
import org.rut.util.algorithm.support.SelectionSort; [G8EX3
import org.rut.util.algorithm.support.ShellSort; M4)U [v
Ox J0."
/** IWv5UmjN
* @author treeroot #w|v.35%?
* @since 2006-2-2 eowwN>-2C
* @version 1.0 vE(]!CB
*/ 7#j.yf4
public class SortUtil { 7 w,D2T
public final static int INSERT = 1; k ?KJ8
public final static int BUBBLE = 2; ( xooU 8d
public final static int SELECTION = 3; X9?)P5h=
public final static int SHELL = 4; MUl7o@{'
public final static int QUICK = 5; e]1'D
public final static int IMPROVED_QUICK = 6; o7E|wS
public final static int MERGE = 7; ,TWlg
public final static int IMPROVED_MERGE = 8; Rnwm6nu
public final static int HEAP = 9; (Nc~l ^a
Vc5>I_
public static void sort(int[] data) { ^*fD
sort(data, IMPROVED_QUICK); +:^l|6%}
} 'v<v6vs
private static String[] name={ tUH?N/qn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T=YVG@fm?
}; '9u?lA^9$
_(g0$vRP~
private static Sort[] impl=new Sort[]{ ~-vCY
new InsertSort(), AmIW$(Ce
new BubbleSort(), E'4Psx9: =
new SelectionSort(), 4#>Z.sf
new ShellSort(), QSF0?Puf
new QuickSort(), rtAPkXJFM
new ImprovedQuickSort(), >(P(!^[f
new MergeSort(), U:8]G
new ImprovedMergeSort(), z0LspRaz
new HeapSort() vW eg1
}; !{+CzUo@
%2dzx[s
public static String toString(int algorithm){ u3qxG3
return name[algorithm-1]; ;8PO}{rD
} giu{,gS0?M
E`_T_O=P
public static void sort(int[] data, int algorithm) { B /uaRi%
impl[algorithm-1].sort(data); 4F.,Y3
} P`@Rt
]:LlOv$
public static interface Sort { U%bm{oVn
public void sort(int[] data); M`al~9
} *;}xg{@
D*2*FDGI
public static void swap(int[] data, int i, int j) { s i2@k
int temp = data; 3);P!W4>
data = data[j]; Mrgj*|
data[j] = temp; D|(\5]:R
} hO[_ _j8
} |oU I2<"