[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; Gl+Ql?|
} ?3vOc/2@
int i1=l; BWd{xP y
int i2=mid+1; PN$vBFjm
for(int cur=l;cur<=r;cur++){ lM<SoC;[
if(i1==mid+1) m3La;%aA0
data[cur]=temp[i2++]; +Je(]b@
else if(i2>r) 5,pKv
data[cur]=temp[i1++]; :Ur=}@Dj
else if(temp[i1] data[cur]=temp[i1++]; ]nEZQ+F
else U6R"eQUTV
data[cur]=temp[i2++]; vXio /m
} 6axDuwQ
} <`~zKFUQ[
ns{BU->f
} ;T6x$e
j#`d%eQ~J
改进后的归并排序: #DL( %=:
oZY2K3J)
package org.rut.util.algorithm.support; 0^27grU>
Ot]Y/;K
import org.rut.util.algorithm.SortUtil; 2I2#o9(Ar
w# t[sI"IT
/** \;b)qB
* @author treeroot 6"d^4L?
* @since 2006-2-2 H|uvcvf
* @version 1.0 -RSPYQjz
*/ ]lKQwpX3
public class ImprovedMergeSort implements SortUtil.Sort { *TjolE~o
-\.'WZo`
private static final int THRESHOLD = 10; A=v^`a03I
S;582H9D
/* k]vrqjn Q
* (non-Javadoc) jmcb-=ts
* Or0eY#c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :OF:(,J
*/ qrFC4\q}
public void sort(int[] data) { b :Knc$
int[] temp=new int[data.length]; q=M\#MlL0'
mergeSort(data,temp,0,data.length-1); q 16jL,i
} a!;]9}u7
GYx_9"J\5
private void mergeSort(int[] data, int[] temp, int l, int r) { X>n\@rTo
int i, j, k; B"-gK20vY
int mid = (l + r) / 2; Whf7J'
if (l == r) GS%i<HQ3
return; ,@_$acm
if ((mid - l) >= THRESHOLD) L=. 4x=%%
mergeSort(data, temp, l, mid); ?ah<Qf]
else Pgy&/-u
insertSort(data, l, mid - l + 1); +&W%]KEh
if ((r - mid) > THRESHOLD) m"2KAq61
mergeSort(data, temp, mid + 1, r); FyZa1%Tv@
else k \|[=
insertSort(data, mid + 1, r - mid); Wp0e?bK_
Z=ayVsJ3
for (i = l; i <= mid; i++) { q<YteuZJ,
temp = data; MI|51&m
} _.xT :b36
for (j = 1; j <= r - mid; j++) { YHVJg?H3
temp[r - j + 1] = data[j + mid]; O};U3=^0f
} T;eA<,H
int a = temp[l]; Su<Ggv"
int b = temp[r]; ?G5JAG`
for (i = l, j = r, k = l; k <= r; k++) { .b4_O CGg
if (a < b) { 9.KOrg5}L
data[k] = temp[i++]; :qV}v2
a = temp; 1_Um6vS#
} else { TJ:B_F*bSk
data[k] = temp[j--]; OHqc,@a;+
b = temp[j]; $J/Z~(=JT
} O7#ECUH
} ~~?4w.k
} k)W8%=R
BReNhk)S
/** f6 zT
* @param data 6]i"lqb
* @param l 8{5Y%InL
* @param i HevS}L
*/ vG(Gs=.U
private void insertSort(int[] data, int start, int len) { iOB]72dh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }+[H~8)5
} y.AF90Q>)
} w' E
} tylMJ$ 9*.
} x%ZgLvdp,
qll)
堆排序： ,3G8afo
EDR;" G(N
package org.rut.util.algorithm.support; ta>:iQa
DWB.dP *8
import org.rut.util.algorithm.SortUtil; (+<SR5,/3
|Ire#0Nwx
/** Do7&OBI~
* @author treeroot <RmI)g>'_^
* @since 2006-2-2 %]JSDb=C
* @version 1.0 u>Z0ug6x
*/ Epm\=s
public class HeapSort implements SortUtil.Sort{ $oO9N^6yF
eRC /Pr
/* (non-Javadoc) VGoD2,(b^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #>-_z
*/ n*6b*fl
public void sort(int[] data) { k+>-?S,
MaxHeap h=new MaxHeap(); AZ)H/#be
h.init(data); ]HP aM
for(int i=0;i h.remove(); p=U*4[9k
System.arraycopy(h.queue,1,data,0,data.length); 7Op6>i
} fX).A`
\ajy%$;$}
private static class MaxHeap{ 7:U^Ki
G#ov2
void init(int[] data){ Cf`s:A5<J
this.queue=new int[data.length+1]; ]/!#:
for(int i=0;i queue[++size]=data; jX^uNmb
fixUp(size); ^[}^+
} UY*3b<F}
} k%V#{t.
*%L:soM'Ll
private int size=0; `7qZ6Z3z@
kP9DCDO`[5
private int[] queue; .P\wE";
+Zu*9&Cx
public int get() { `}gjfu -'\
return queue[1]; vn@9Sqk
} B&&:A4
^PIUA'
public void remove() { _}.BZ[i
SortUtil.swap(queue,1,size--); ^)Xl7d|m+
fixDown(1); ~:r:?PwWG
} * 8n0
file://fixdown EnXNTat})
private void fixDown(int k) { !T/^zc;G
int j; {-IH?!&v
while ((j = k << 1) <= size) { 5BCHWX*y
if (j < size %26amp;%26amp; queue[j] j++; Hc1S:RW
if (queue[k]>queue[j]) file://不用交换 :T(3!}4
break; )J4XM(
SortUtil.swap(queue,j,k); hjywYd]8
k = j; DjK:)
} lz.ta!6
} oJJ2y
private void fixUp(int k) { 0R&$P6
while (k > 1) { b f.__3{
int j = k >> 1; 5LU8QHj3
if (queue[j]>queue[k]) d^sS{m\
break; ~aKxwH
SortUtil.swap(queue,j,k); bD[W`yW0
k = j; s^F6sXhyPi
} W'w;cy:H
} 1w}%>e-S
5q<AMg
} Lu!o!>b
X(Gp3lG
} :,03)[u{8
UN'[sHjOnD
SortUtil： 6('2.^8
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package org.rut.util.algorithm; xMNUyB{?
_oK*1#Rm8
import org.rut.util.algorithm.support.BubbleSort; /?<o?IR~6
import org.rut.util.algorithm.support.HeapSort; H'E(gc)>)
import org.rut.util.algorithm.support.ImprovedMergeSort; $s-/![ 6
import org.rut.util.algorithm.support.ImprovedQuickSort; Coz\fL
import org.rut.util.algorithm.support.InsertSort; ) -x0xY
import org.rut.util.algorithm.support.MergeSort; f0+)%gO{
import org.rut.util.algorithm.support.QuickSort; 7M*&^P\}es
import org.rut.util.algorithm.support.SelectionSort; "w.gP8`
import org.rut.util.algorithm.support.ShellSort; ;5qZQ8`4
SoX\S|}%6[
/** U_ELeW5@
* @author treeroot 555j@
* @since 2006-2-2 NO5\|.,Z
* @version 1.0 -0rc4<};h
*/ +~b@W{
public class SortUtil { M:6Yy@#T.
public final static int INSERT = 1; tQ=P.14>:
public final static int BUBBLE = 2; P%MYr"<$E
public final static int SELECTION = 3; JGl0 (i*|
public final static int SHELL = 4; ha+)ZF
public final static int QUICK = 5; D?ojxHe
public final static int IMPROVED_QUICK = 6; +VxzWNs*JP
public final static int MERGE = 7; 34S0W]V
public final static int IMPROVED_MERGE = 8; P%w)*);
public final static int HEAP = 9; Q!7il<S
A)"?GK{*
public static void sort(int[] data) { KwO;ICdJ
sort(data, IMPROVED_QUICK); jd]Om r!
} w1tWyKq
private static String[] name={ 6U|An*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T%|{Qo<j
}; IiW*'0H:/
XS+2OutVo
private static Sort[] impl=new Sort[]{ E Dh$UB)
new InsertSort(), XFJGL!wWm[
new BubbleSort(), SB"Uu2)wZ
new SelectionSort(), Zi'}qs$v
new ShellSort(), `5da
new QuickSort(), <r 2$k"*:
new ImprovedQuickSort(), 9Z,K
new MergeSort(), Fo\* Cr9D
new ImprovedMergeSort(), ejs_ ?
new HeapSort() %l{0z<
}; =^a Ngq
(lPiv+'n
public static String toString(int algorithm){ IZ?+c@t
return name[algorithm-1]; j{QzD^t
} miWog8j
{vCB$@/o
public static void sort(int[] data, int algorithm) { NVyel*QE
impl[algorithm-1].sort(data); v+\&8)W=
} Cn6<I{`\
`^_c&y K
public static interface Sort { 2z*EamF
public void sort(int[] data); #6okd*^
} f8ucJ.{"
+%E)]*Ym
public static void swap(int[] data, int i, int j) { {v3?.a$u
int temp = data; P_e9>t@
data = data[j]; #Y|t,x;
data[j] = temp; K"fr4xHq
} LT+QW
} 2Kg-ZDK8