[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; F%Lniv/N
} 4C;4"6
int i1=l; _F *(" o
int i2=mid+1; Yp`6305f
for(int cur=l;cur<=r;cur++){ w 1E}F
if(i1==mid+1) OKp(A
data[cur]=temp[i2++]; sM?bUg0w
else if(i2>r) pX]*&[X?
data[cur]=temp[i1++]; In0kP"
else if(temp[i1] data[cur]=temp[i1++]; *a@pZI0'
else K'%,dn
data[cur]=temp[i2++]; rSD!u0c[
} |Mp_qg?g
} Es kh=xA {
@$~ BU;kR
} FG~p_[K
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改进后的归并排序: Hm+-gI3*
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package org.rut.util.algorithm.support; R.R(|!w>
fz W%(.tc\
import org.rut.util.algorithm.SortUtil; 2FO.!m
,sk;|OAI
/** '?5=j1
* @author treeroot 0*%j6*XDq9
* @since 2006-2-2 3R?7&oXvH
* @version 1.0 5( lE$&
*/ -uiZp !
public class ImprovedMergeSort implements SortUtil.Sort { 2;4Of~
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private static final int THRESHOLD = 10; ]do0{I%\eq
SMQuJ_
/* 56*}}B$?
* (non-Javadoc) >Ge&v'~_|
* aT F}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &{* [7Ad
*/ vhEPk2wD,
public void sort(int[] data) { g?M\Z";
int[] temp=new int[data.length]; ^"ywltW>
mergeSort(data,temp,0,data.length-1); $.(>Sj1
} O@3EJkv
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private void mergeSort(int[] data, int[] temp, int l, int r) { ;tI=xNre`1
int i, j, k; TD,W*(b
int mid = (l + r) / 2; Y.@ vdW
if (l == r) 7I`e5\ u
return; MyuFZ7Q4$
if ((mid - l) >= THRESHOLD) mY.[AIB
mergeSort(data, temp, l, mid); @5zL4n@w
else r,i^-jv;
insertSort(data, l, mid - l + 1); tCK%vd%
if ((r - mid) > THRESHOLD) W)V"QrFK
mergeSort(data, temp, mid + 1, r); pr/yDGia
else Iq_cs '
insertSort(data, mid + 1, r - mid); $dci?7q
#:{PAt
for (i = l; i <= mid; i++) { B{QY-F~
temp = data; E/LR(d_
} 1bd(JL
for (j = 1; j <= r - mid; j++) { ro6peUL*2`
temp[r - j + 1] = data[j + mid]; E$f.&<>T
} %\[LM$f{z
int a = temp[l]; R|8)iW^
int b = temp[r]; Hbx=vLQ6
for (i = l, j = r, k = l; k <= r; k++) { b}o^ ?NtA
if (a < b) { Yv9(8
data[k] = temp[i++]; 1d|+7
a = temp; 1I KDp]SN
} else { A;w,m{9<
data[k] = temp[j--]; Tm[IOuhM'?
b = temp[j]; X'ryfa1|
} c^UG}:Y
} eqs.zL
} 9<P1?Q
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/** vgHMVzxj
* @param data +WK!}xZR
* @param l NXDdU^w7B
* @param i J`uV $l:
*/ (2QFwBW]
private void insertSort(int[] data, int start, int len) { //>f#8Ho
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bKmR &
} v%=G~kF}[
} .!,T>:R
} e0+N1kY
} znFa4
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堆排序： DK&J"0jz,
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package org.rut.util.algorithm.support; QOEcp% 6I}
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import org.rut.util.algorithm.SortUtil; A/W0O;*q
}X)mZyM[
/** i=.zkIjSh
* @author treeroot Cz+>S3v M
* @since 2006-2-2 6jiVz%`=Z
* @version 1.0 8"LvkN/v^
*/ :u`
public class HeapSort implements SortUtil.Sort{ \$V~kgQ0
,S2D/Y^>
/* (non-Javadoc) H{E223
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d5\w'@Di
*/ c@~\ FUr
public void sort(int[] data) { 7z)Hq./3@
MaxHeap h=new MaxHeap(); BE:HO^-.1
h.init(data); ; GRSe
for(int i=0;i h.remove(); 7\rz*
System.arraycopy(h.queue,1,data,0,data.length); N{tNe-5
} pz6fL=Xd
My76]\Psh
private static class MaxHeap{ D^]7/w:$-
{2}O\A
void init(int[] data){ 7pMrYIP
this.queue=new int[data.length+1]; V?t^ J7{'
for(int i=0;i queue[++size]=data; \eT0d<
fixUp(size); U{} bx
} >>Z.]
} LS+ _y<v=
mMS%O]m,|
private int size=0; kTT!gZP$
/G9wW+1
private int[] queue; 7;) T;X
t)=u}t$
public int get() { H? Z5ex
return queue[1]; 6FiI\
} &{]zL
#pErGz'{
public void remove() { `6)GjZh^
SortUtil.swap(queue,1,size--); 0+}42g|_Z
fixDown(1); Cz-eiPlq
} x?9rT 0D
file://fixdown C,P>7
private void fixDown(int k) { Pb]: i+c)
int j; %# ?)+8"l
while ((j = k << 1) <= size) { ?]]>WP
if (j < size %26amp;%26amp; queue[j] j++; Fc M
if (queue[k]>queue[j]) file://不用交换 IC{\iwO/~c
break; U}~SY
SortUtil.swap(queue,j,k); Jajo!X*Wai
k = j; }KEyJj3"DA
} b lP@Cn2
} |,cQJ
private void fixUp(int k) { X+z!?W*a
while (k > 1) { P hs4]!
int j = k >> 1; __fa,kK{?
if (queue[j]>queue[k]) zt/b S/
break; ?'Y\5n/*$
SortUtil.swap(queue,j,k); Ly"u }e
k = j; 6oMU) DIa
} SMY,bU'a
} oDogM`T`
{`2! 3= "
} \1cay#X
ig5 d-A
} 'G;y!<a
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SortUtil： 9fj3q>Un,
7g8}]\i+
package org.rut.util.algorithm; r:]t9y>$<
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import org.rut.util.algorithm.support.BubbleSort; thy)J.<J
import org.rut.util.algorithm.support.HeapSort; sG[v vm
import org.rut.util.algorithm.support.ImprovedMergeSort; T2<?4^xN
import org.rut.util.algorithm.support.ImprovedQuickSort; {VtmQU?cJ
import org.rut.util.algorithm.support.InsertSort; d]{wZ#x
import org.rut.util.algorithm.support.MergeSort; S {oW
import org.rut.util.algorithm.support.QuickSort; B9^@d
import org.rut.util.algorithm.support.SelectionSort; |T\`wcP`q
import org.rut.util.algorithm.support.ShellSort; r"sK@
-c|dTZ8D)8
/** AiKja>Fl<
* @author treeroot V`7
* @since 2006-2-2 I .jB^
* @version 1.0 W=:4I[a6Q
*/ N4]QmRX/j
public class SortUtil { Fk=Sx<TX
public final static int INSERT = 1; qM= $,s*
public final static int BUBBLE = 2; y (@j;Q3(r
public final static int SELECTION = 3; 7DZxrVw
public final static int SHELL = 4; .<7M4Z
public final static int QUICK = 5; @SeInew;`l
public final static int IMPROVED_QUICK = 6; oS6dcJHf
public final static int MERGE = 7; B( r~Nvc
public final static int IMPROVED_MERGE = 8; go >*n\
public final static int HEAP = 9; b* k=
_/(DEF+G
public static void sort(int[] data) { ,' VT75
sort(data, IMPROVED_QUICK); g@0<`g
} HY-7{irR~
private static String[] name={ $cjwY$6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H@Yj
}; Sggha~E2s
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private static Sort[] impl=new Sort[]{ a,mG5bQ!
new InsertSort(), r&
new BubbleSort(), 5:y\ejU
new SelectionSort(), S:2M9nC
new ShellSort(), _=0%3Sh
new QuickSort(), &CBW>*B
new ImprovedQuickSort(), DEJ0<pnQr
new MergeSort(), %87D(h!.I4
new ImprovedMergeSort(), "/H B#
new HeapSort() U}f"a!
}; m8M2ka
=VIU
public static String toString(int algorithm){ %!DdjC&5*
return name[algorithm-1]; Ac^hZ.qPz
} QguRU|y
7`eg;s^
public static void sort(int[] data, int algorithm) { (<GBhNj=c
impl[algorithm-1].sort(data); S $j"'K
} 0\tV@ 6p2=
?{=&Ro
public static interface Sort { rtM29~c>@
public void sort(int[] data); )M3}6^s]
} f2h`bO
Ln-UN$2~F
public static void swap(int[] data, int i, int j) { M2Q*#U>6r
int temp = data; L#huTKX}
data = data[j]; JG^fu*K
data[j] = temp; wFbw3>'a9
} LV}Z[\?
} ]bcAbCZ@