[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; p;Ok.cXVp
} 0 S8{VZpy
int i1=l; ;RZa<2
int i2=mid+1; ^a5~FI:
for(int cur=l;cur<=r;cur++){ 4GejT(U
if(i1==mid+1) 4i&!V9@:
data[cur]=temp[i2++]; pR7G/]U$A
else if(i2>r) ct/THq
data[cur]=temp[i1++]; Z$K%@q,10+
else if(temp[i1] data[cur]=temp[i1++]; "Ksd9,J\b
else !m5\w>
data[cur]=temp[i2++]; Cu<ojN- $
} .z7f_KX^
} pnb$lpxt
FsZEB/c
} sh3}0u+
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改进后的归并排序: BU\NBvX$
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package org.rut.util.algorithm.support; xx#Ef@bS
9.}3RAB(cv
import org.rut.util.algorithm.SortUtil; r~a}B.pj
iv`-)UsE
/** T js{ )r9
* @author treeroot *hgsS~
* @since 2006-2-2 g+{MvSj$
* @version 1.0 ?UIb!k>
*/ NPq2C8:
public class ImprovedMergeSort implements SortUtil.Sort { oYm"NDS_.
hrxASAfg6
private static final int THRESHOLD = 10; iU|C<A%Hh
*Y>'v%
/* L7="!I
* (non-Javadoc) 3CL:VwoW
* !}m8]&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fP*C*4#X
*/ KDzIarC
public void sort(int[] data) { 7cSvAX0Z.
int[] temp=new int[data.length]; 0drc^rj !
mergeSort(data,temp,0,data.length-1); >CA1Ub&ls
} 9{&x-ugM
8[XNFFUZs
private void mergeSort(int[] data, int[] temp, int l, int r) { z`6KX93
int i, j, k; "K]4j]yU
int mid = (l + r) / 2; @}}1xP4Sr
if (l == r) ^U1+D^AJ
return; yrb%g~ELGn
if ((mid - l) >= THRESHOLD) I*t}gvUt9
mergeSort(data, temp, l, mid); _J`M>W)8
else !2,.C+,
insertSort(data, l, mid - l + 1); 3c"{Wu-}
if ((r - mid) > THRESHOLD) v8=MO:>{R
mergeSort(data, temp, mid + 1, r); E$baQU hKS
else uu#+|ZD
insertSort(data, mid + 1, r - mid); o W [-?
KJ |1zCM
for (i = l; i <= mid; i++) { *V+fRN4 W
temp = data; '/@VG_9L]
} |1$X`|S
for (j = 1; j <= r - mid; j++) { BW1O1zIh\
temp[r - j + 1] = data[j + mid]; v7RDoO]I
} TR;-xst@
int a = temp[l]; <]J5AdJ
int b = temp[r]; Xp@OIn
for (i = l, j = r, k = l; k <= r; k++) { .- o,_eg1f
if (a < b) { p_5+L@%Gb
data[k] = temp[i++]; ={d\zjI$
a = temp; .4-S|]/d,
} else { 4cL=f
data[k] = temp[j--]; JaTW/~ TU
b = temp[j]; !h;VdCCi#
} `8*$$JC
} ^^mi@&ApLD
} _TiF}b!hi
ZH*?~ #
/** 6&cU*Io@
* @param data \^D`Hvg
* @param l AUd}) UR
* @param i =^{+h>#s@
*/ ZGBcy}U(k
private void insertSort(int[] data, int start, int len) { r>OE[C69
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9)`wd&!
} _;+&'=6.[
} :I8t}Wg
} 1,,:4*)
} ~M=`f{-$K
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堆排序： Si(?+bda0c
Obm\h*$
package org.rut.util.algorithm.support; :>u{BG;=79
e!yt<[ph
import org.rut.util.algorithm.SortUtil; 0Oq1ay^
mNzZ/*n:
/** e78}
* @author treeroot 6I<`N
* @since 2006-2-2 ^ +G> N
* @version 1.0 ud1E@4;qf
*/ ?6gI8K6X
public class HeapSort implements SortUtil.Sort{ QS_xOQ '
0o`o'ZV=c
/* (non-Javadoc) :nn'>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xMu6PM<l
*/ -`JY] H
public void sort(int[] data) { N_U D7P1
MaxHeap h=new MaxHeap(); 7(-<x@e
h.init(data); K>U&jH
for(int i=0;i h.remove(); (G Y`O
System.arraycopy(h.queue,1,data,0,data.length); 1{qg@xlj
} Y2fs$emv
A}o1I1+
private static class MaxHeap{ "=)`*"rr
>jm9x1+C
void init(int[] data){ qIl@,8T
this.queue=new int[data.length+1]; n$8A"'.M
for(int i=0;i queue[++size]=data; ] N8V?.|:
fixUp(size); >ZT3gp?E
} uFgw eOJ
} %$Uw]a
'DPSM?]fA
private int size=0; F~6[DqF\|
W0Vjs|/
private int[] queue; 78kk"9h'
X|:O`b$G
public int get() { C.|MA(7
return queue[1]; YZd4% zF
} x1Uj4*Au
(<t)5?@%
public void remove() { u=5^xpI<D
SortUtil.swap(queue,1,size--); k 'o?/
fixDown(1); `Bx CTwc
} J5-^@JYK
file://fixdown Mh\c+1MFs
private void fixDown(int k) { O-RiDYej
int j; ]dH;+3}
while ((j = k << 1) <= size) { 6[i-Tl
if (j < size %26amp;%26amp; queue[j] j++; Ogb!YF#e
if (queue[k]>queue[j]) file://不用交换 .*+&>m7
break; q0o6%c:gW
SortUtil.swap(queue,j,k); 6 [IiJhVL
k = j; "xKJ?8
} zB4gnVhus|
} juM?y'A
private void fixUp(int k) { &j$k58mX
while (k > 1) { NB[b[1 Ch
int j = k >> 1; EJZ2V>\_-0
if (queue[j]>queue[k]) Ec|#i
break; S; >_9
SortUtil.swap(queue,j,k); IcN|e4t^J+
k = j; N6eY-`4y
} 2gi`^%#k]
} FTn[$q
t_3XqjuA
} P<U{jkM\/
FRr<K^M
} +aMPwTF:3
3j6$!89'
SortUtil： D0~mu{;c$
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package org.rut.util.algorithm; &WIPz\
N?aU<-Tn
import org.rut.util.algorithm.support.BubbleSort; K.k=\N
import org.rut.util.algorithm.support.HeapSort; +g*Ko@]m>
import org.rut.util.algorithm.support.ImprovedMergeSort; #'8E%4
import org.rut.util.algorithm.support.ImprovedQuickSort; 6<2 7}S
import org.rut.util.algorithm.support.InsertSort; <7qM;)g
import org.rut.util.algorithm.support.MergeSort; $8b/"Qm
import org.rut.util.algorithm.support.QuickSort; 8ARpjYZP
import org.rut.util.algorithm.support.SelectionSort; Q~`n%uYg\{
import org.rut.util.algorithm.support.ShellSort; Oo,<zS=ICk
Pp?J5HW
/** ,JR7N_"I
* @author treeroot B<W{kEY
* @since 2006-2-2 yZKj>P1
* @version 1.0 6+>q1,<
*/ Gk<h_1WWK
public class SortUtil { >zhbOkR9c
public final static int INSERT = 1; tH$Z_(5
public final static int BUBBLE = 2; 6HyQm?c>a
public final static int SELECTION = 3; n@xU5Q
public final static int SHELL = 4; 0@z78h=h
public final static int QUICK = 5; {epsiHK@tK
public final static int IMPROVED_QUICK = 6; 3AWg43L7
public final static int MERGE = 7; &BP%~
public final static int IMPROVED_MERGE = 8; `.@N9+Aj
public final static int HEAP = 9; Y?Xs Z
X\_ku?]v
public static void sort(int[] data) { Av{1~%hU
sort(data, IMPROVED_QUICK); Rv }e+5F
} jZ)1]Q2
private static String[] name={ {'JoVJKv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0q81H./3
}; A^G%8 )\
z.FO6y6L
private static Sort[] impl=new Sort[]{ Vg0Rc t
new InsertSort(), "gYn$4|R7*
new BubbleSort(), zXB.)4T
new SelectionSort(), 3(X"IoNQ
new ShellSort(), lbMb
new QuickSort(), 4]B(2FR[8
new ImprovedQuickSort(), wPOQy~:
new MergeSort(), %ZZ\Xj
new ImprovedMergeSort(), =MA$xz3
new HeapSort() P@)zNik[
}; lO[[iMHl<
>%t"VpvR
public static String toString(int algorithm){ gWRSS=8%
return name[algorithm-1]; >Qr(#Bt)
} (Zp'|hx8o
Fq:BRgCE
public static void sort(int[] data, int algorithm) { S'q (Qo
impl[algorithm-1].sort(data); 0I1bY]*
} E`$d!7O
=98@MX%P
public static interface Sort { K^>+"
public void sort(int[] data); ki39$A'8
} "??$yMW
46sV\In>?
public static void swap(int[] data, int i, int j) { rF'q\tJDz
int temp = data; ;BsyN[bF
data = data[j]; }Til $TT%H
data[j] = temp; x^&D8&4^
} ; &$djP
} rz5AIe>Hm