[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; I=3e@aTZ,
} ;qF#!Kb5
int i1=l; "nK(+Z
int i2=mid+1; &JpFt^IHi
for(int cur=l;cur<=r;cur++){ wbaXRvg
if(i1==mid+1) De*Z UN|<
data[cur]=temp[i2++]; n|oAfJUk,
else if(i2>r) ToHCS/J59
data[cur]=temp[i1++]; wGC)gW
else if(temp[i1] data[cur]=temp[i1++]; kFG>Km(y}
else hp E?
data[cur]=temp[i2++]; S6sw)
} \KaWR
} Q(2X$7iRq
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} hL,+wJ+A
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改进后的归并排序: M7(vI4V
0Up@+R2
package org.rut.util.algorithm.support; %q@eCN
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import org.rut.util.algorithm.SortUtil; C||A[JOS
G'<J8;B* t
/** *eO@<j?
* @author treeroot &!{wbm@
* @since 2006-2-2 ~OXC6z
* @version 1.0 U$`)|/8
*/ >_biiW~x:
public class ImprovedMergeSort implements SortUtil.Sort { qK4E:dD
|Aw(v6
private static final int THRESHOLD = 10; h !~u9
O]n"aAu@
/* }Vpr7_
* (non-Javadoc) xi=qap=S^9
* O\T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *Bt`6u.>e,
*/ /AR;O4X+
public void sort(int[] data) { kQ$Q}3f
int[] temp=new int[data.length]; :ji_dQ8k
mergeSort(data,temp,0,data.length-1); 8IH&=3
} OjCT*qyU<
byv(:xk|'e
private void mergeSort(int[] data, int[] temp, int l, int r) { HlB'yOHv!
int i, j, k; D4m2*%M
int mid = (l + r) / 2; X?b]5?K;r
if (l == r) Tv0|e'^
return; z+1#p.F$@
if ((mid - l) >= THRESHOLD) 9BGPq)#
mergeSort(data, temp, l, mid); Jr18faEZw
else .e2u)YqA
insertSort(data, l, mid - l + 1); (9BjZ&ej
if ((r - mid) > THRESHOLD) ?J+[|*'yK
mergeSort(data, temp, mid + 1, r); ~u&3Ki*x
else 0*%j6*XDq9
insertSort(data, mid + 1, r - mid); 3R?7&oXvH
5( lE$&
for (i = l; i <= mid; i++) { 9jiZtwRpk
temp = data; AjaG.fa]k
} ,LXuU8sB
for (j = 1; j <= r - mid; j++) { &tKs t,UR8
temp[r - j + 1] = data[j + mid]; <}%>a@
} &j/ WjZPF
int a = temp[l]; +b]g;
int b = temp[r]; M"K$81
for (i = l, j = r, k = l; k <= r; k++) { :eI.E:/'
if (a < b) { vZC2F
data[k] = temp[i++]; x!q$`zF\\
a = temp; ,SJB3if
} else { g?M\Z";
data[k] = temp[j--]; ^"ywltW>
b = temp[j]; ~fs{Ff'
} f3-=?Z
} 9c806>]U^
} '=x
S,vrz!'>A
/** TD,W*(b
* @param data :XF;v
* @param l Wn24eld"x
* @param i !wvP24"y
*/ 'r4 j;Jn
private void insertSort(int[] data, int start, int len) { q:-8W[_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $qy%Q]
} [S":~3^B6
} >E?626*
} DJrE[wI
} <!&nyuSz
PBr-<J
堆排序： FgRlxz
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package org.rut.util.algorithm.support; L1.<LB^4'
A7-QOqST(
import org.rut.util.algorithm.SortUtil; !yH&l6s
@6ZQkX/
/** VbK| VON[
* @author treeroot }MrRsvN
* @since 2006-2-2 S'V0c%'QQV
* @version 1.0 DI**fywu[3
*/ 9wC q
public class HeapSort implements SortUtil.Sort{ @y9_\mX!s
-sGfpLy<6
/* (non-Javadoc) R#Id"O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a)4.[+wnRf
*/ bWwc2##7jo
public void sort(int[] data) { A[;R_
MaxHeap h=new MaxHeap(); F[115/
h.init(data); ;hmy7M1%
for(int i=0;i h.remove(); fT/;TK>z>
System.arraycopy(h.queue,1,data,0,data.length); 2M= gpy
} ,/|"0$p2x
j*g5f
private static class MaxHeap{ WU{G_Fqaz
sBq @W4
void init(int[] data){ {k}S!T
this.queue=new int[data.length+1]; <"AP&J'H
for(int i=0;i queue[++size]=data; I8`@Srw8
fixUp(size); N4}/n
} Z|uUE
} qWtvo';3
5>"$95D
private int size=0; [st4FaQ36
hPx=3L$
private int[] queue; : UD<1fh
sk$MJSE ~
public int get() { yFshV\
return queue[1]; 1'R]An BV
} P$N\o@
RXb+"/
public void remove() { %IW=[D6Tg
SortUtil.swap(queue,1,size--); d"Hh9O}6
fixDown(1); U8?QyG 2A
} !V$m!i;
file://fixdown PE|_V
private void fixDown(int k) { d>)*!l2,C
int j; 9EK5#_L[=
while ((j = k << 1) <= size) { F.?^ko9d
if (j < size %26amp;%26amp; queue[j] j++; >"{3lDyq-
if (queue[k]>queue[j]) file://不用交换 @ bPQhn#(g
break; W'-B)li
SortUtil.swap(queue,j,k); @.a[2,o_
k = j; pqBd#
} d11~mU\
} 5K;jW
private void fixUp(int k) { #<S+E7uTs
while (k > 1) { 4EJ
int j = k >> 1; nxKV7d@R
if (queue[j]>queue[k]) O2q`2L~
break; .4^Ep\\
SortUtil.swap(queue,j,k); cc*A/lD
k = j; 4W*52*'F,
} TPt<(-}W
} /^G1wz2
6OF&Q`*4
} `!kOyh:X
CQW#o_\
} {l%Of
|gA~E>IqF
SortUtil： c-z ,}`
81O`#DfZ
package org.rut.util.algorithm; 7;) T;X
'mp@!@_
import org.rut.util.algorithm.support.BubbleSort; 8Sd<!
import org.rut.util.algorithm.support.HeapSort; 6FiI\
import org.rut.util.algorithm.support.ImprovedMergeSort; !0CC&8C`
import org.rut.util.algorithm.support.ImprovedQuickSort; HbX>::J8
import org.rut.util.algorithm.support.InsertSort; ^J< I Ia4
import org.rut.util.algorithm.support.MergeSort; WOrz7x
import org.rut.util.algorithm.support.QuickSort; )AEJ`xC
import org.rut.util.algorithm.support.SelectionSort; G?jKm_`L
import org.rut.util.algorithm.support.ShellSort; <3m_} =\
M^AwOR7<
/** 3E$M{l
* @author treeroot ?]]>WP
* @since 2006-2-2 Fc M
* @version 1.0 IC{\iwO/~c
*/ :$~)i?ge<5
public class SortUtil { Jajo!X*Wai
public final static int INSERT = 1; }KEyJj3"DA
public final static int BUBBLE = 2; b lP@Cn2
public final static int SELECTION = 3; k(pI5N}pJZ
public final static int SHELL = 4; X+z!?W*a
public final static int QUICK = 5; P hs4]!
public final static int IMPROVED_QUICK = 6; &q^\*<B.^
public final static int MERGE = 7; @#hd8_)A.
public final static int IMPROVED_MERGE = 8; 7IB<0
public final static int HEAP = 9; [fiB!G]?
!1$QNxgi
public static void sort(int[] data) { /bv1R5
sort(data, IMPROVED_QUICK); vxhs1vh
} s!X@ l
private static String[] name={ 0?8O9i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <^c?M[j
}; y[:\kI
:hr% 6K7
private static Sort[] impl=new Sort[]{ dlmF?N|EC
new InsertSort(), y{ %2Q)
new BubbleSort(), u9ObFm$7
new SelectionSort(), 0}C> e`<'
new ShellSort(), [nZf4KN
new QuickSort(), S<#>g s4
new ImprovedQuickSort(), {4J:t_<nKO
new MergeSort(), Anr''J&9`H
new ImprovedMergeSort(), 1O]'iS"
new HeapSort() epuN~T
}; j*+[=X/
[-5%[ty9X
public static String toString(int algorithm){ Sio^FOTD
return name[algorithm-1]; HX%lL}E
} xl8=y
rp^=vfW
public static void sort(int[] data, int algorithm) { ~~>`WA\G5,
impl[algorithm-1].sort(data); : 8dQ8p;
} %Hx8%G!
]CHO5'%,$
public static interface Sort { 1BK!<}yI{
public void sort(int[] data); h+=xG|1R[5
} v EppkS U1
-< D7
public static void swap(int[] data, int i, int j) { yw2Mr+9I
int temp = data; $c"byQ[3S
data = data[j]; ]^j:}#R
data[j] = temp; wX5Yo{
} 2[!#Xf
} hEUS&`K