[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; N%7{J
} &X|<@'933
int i1=l; .MVYB\6Q0
int i2=mid+1; PN$X N<
for(int cur=l;cur<=r;cur++){ b1gaj"]
if(i1==mid+1) 0x11 vr!
data[cur]=temp[i2++]; TDg@Tg0
else if(i2>r) [L6w1b,
data[cur]=temp[i1++]; T/c<23i
else if(temp[i1] data[cur]=temp[i1++]; 8K;Y2 #
else k-E{d04-2
data[cur]=temp[i2++]; ;uqx@sx ;
} V $|<
} ESg+n(R
4g}FB+[u
} K7e4_ZGI
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改进后的归并排序: -/x W
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package org.rut.util.algorithm.support; ^*&X~8@)
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import org.rut.util.algorithm.SortUtil; RGIoI]_
Sf/q2/r?6[
/** joXfmHB}
* @author treeroot spQLG_o,J
* @since 2006-2-2 o<l 2r
* @version 1.0 8L5!T6+D&
*/ Sd))vS^g
public class ImprovedMergeSort implements SortUtil.Sort { T#!lPH :&h
(X+s-4%
private static final int THRESHOLD = 10; V8-h%|$p3W
a$9A(Pte
/* E2AW7f(/
* (non-Javadoc) t` 8!AhOgc
* sT1&e5`W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2 ?|gnbE:
*/ hzY[ G:
public void sort(int[] data) { }:z5t,u6
int[] temp=new int[data.length]; Q0_>'sEM
mergeSort(data,temp,0,data.length-1); p|XAlia
} !EF(*~r!9L
>0Ev#cX4
private void mergeSort(int[] data, int[] temp, int l, int r) { ~V)?>)T
int i, j, k; BF8"rq}r0
int mid = (l + r) / 2; JmOW~W
if (l == r) ]M,06P>?
return; $R^AEa7
if ((mid - l) >= THRESHOLD) VjbG(nB?_
mergeSort(data, temp, l, mid); X1A<$Am1
else $v}<'
insertSort(data, l, mid - l + 1); 4p)e}W*
if ((r - mid) > THRESHOLD) ~fzuwz
mergeSort(data, temp, mid + 1, r); \ Aq;Q?
else rUwE?Ekn/
insertSort(data, mid + 1, r - mid); h ?#@~
dEp/dd~(&
for (i = l; i <= mid; i++) { tSv0" L
temp = data; |V`S>m%N
} R[A5JQ$[
for (j = 1; j <= r - mid; j++) { FUeq \Wuo
temp[r - j + 1] = data[j + mid]; s&*yk p
} ARL
int a = temp[l]; mVm4fHEYwU
int b = temp[r]; A%ywj'|z
for (i = l, j = r, k = l; k <= r; k++) { e^e$mtI
if (a < b) { OM96`
data[k] = temp[i++]; A['uD<4b
a = temp; :%_q[}e
} else { R]b! $6Lt
data[k] = temp[j--]; )teFS%
b = temp[j]; K&pM o.
} rm+v(&
} <jd/t19DB
} #q4*]qGHm
boQ)fV"
/** R40W'N1%q
* @param data ]XrE
* @param l (5Ky6b9v
* @param i 3@X7YgILU
*/ B!q?_[k,
private void insertSort(int[] data, int start, int len) { bf98B4<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aG3k4
} mrnxI#6
} =jIxI,
} r%!FmS<
} w~v<v&
*98Ti|
堆排序： ??TdrTS
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package org.rut.util.algorithm.support; 7&t~R}&|
U2&HSE|2J
import org.rut.util.algorithm.SortUtil; F^TAd
7ti<
/** Rkr^Z?/GH
* @author treeroot )_pt*xo
* @since 2006-2-2 iQj2UTds3
* @version 1.0 +G\0L_B
*/ 77_g}N
public class HeapSort implements SortUtil.Sort{ 4^MSX+zt
x#o?>5Qg?
/* (non-Javadoc) Rf8:+d[Jj|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bb_}YU2#
*/ 45r|1<Ro
public void sort(int[] data) { iiehrK&T!
MaxHeap h=new MaxHeap(); (JvQ-H
h.init(data); %d-`71|lG^
for(int i=0;i h.remove(); y$v@wb5
System.arraycopy(h.queue,1,data,0,data.length); Ku&*`dME
} J{^n=X9M0J
@C<d2f|8
private static class MaxHeap{ IF$^0q
(-#rFO5~l
void init(int[] data){ S].Ft/+H
this.queue=new int[data.length+1]; E.U0qK],
for(int i=0;i queue[++size]=data; T!&jFy*W
fixUp(size); /W?z0tk`
} 5@CpP-W#
} ,Os7T 1>
Y)5)s0}
private int size=0; +H?<}N*T
T:dX4=z
private int[] queue; HUD7{6}4
a$laRtId7
public int get() { nh?9R&
return queue[1]; dp33z"<3
} nP5d?
HgS<Vxmq
public void remove() { 91U^o8y
SortUtil.swap(queue,1,size--); p"g1V7B
fixDown(1); $dr27tse&<
} ?'TA!MR
file://fixdown _+}-H'7=
private void fixDown(int k) { 5#yJK>a7
int j; xcAF
while ((j = k << 1) <= size) { Dl>*L
if (j < size %26amp;%26amp; queue[j] j++; D$Kz9GVZq
if (queue[k]>queue[j]) file://不用交换 xYT#!K1*
break; wBg<Q{J
SortUtil.swap(queue,j,k); Xs{:[vRW
k = j; u-8X$aJ
} *4r s
} $'WapxF
private void fixUp(int k) { i#CaKS
while (k > 1) { HGU?bJ~6o
int j = k >> 1; i5ajM,i/K
if (queue[j]>queue[k]) 7Qm;g-)f
break; ?Ry%c6(}
SortUtil.swap(queue,j,k); iSSc5ek4
k = j; bd@*vu}?}
} <`oCz Q1
} ))%@@l[
|V5$'/Y
} }:,o Y<
{^PO3I
} O;"*_Xq(`
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SortUtil： v>x {jZkFL
*"|VNnB
package org.rut.util.algorithm; `<l/GwtAJ
c+,7Zu!
import org.rut.util.algorithm.support.BubbleSort; h|(ZXCH
import org.rut.util.algorithm.support.HeapSort; WHpUjyBP
import org.rut.util.algorithm.support.ImprovedMergeSort; ~8KF<2c
import org.rut.util.algorithm.support.ImprovedQuickSort; u7<qaOzs?
import org.rut.util.algorithm.support.InsertSort; b7W=HR
import org.rut.util.algorithm.support.MergeSort; FR@PhMUS
import org.rut.util.algorithm.support.QuickSort; = )JVT$]w
import org.rut.util.algorithm.support.SelectionSort; 7G<KrKal
import org.rut.util.algorithm.support.ShellSort; AF9[2AH=Y
=Do3#Xe2V
/** 4Vb}i[</
* @author treeroot :{TmR3.
* @since 2006-2-2 X]&;8
* @version 1.0 ?$)x$nS`
*/ d'lr:=GQ
public class SortUtil { t?du+:
public final static int INSERT = 1; `uM0,Z
public final static int BUBBLE = 2; uI[-P}bSc&
public final static int SELECTION = 3; "2#-xOCO
public final static int SHELL = 4; ]2aYi9)
public final static int QUICK = 5; Q}=W>|aE.
public final static int IMPROVED_QUICK = 6; jE?\Yv3
public final static int MERGE = 7; -$L],q_S^
public final static int IMPROVED_MERGE = 8; 9QX~aX
public final static int HEAP = 9; iSZctsqE
$$bTd3N+
public static void sort(int[] data) { YvxMA#
sort(data, IMPROVED_QUICK); O#Zs3k
} PcNfTB{
private static String[] name={ oM18aR&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gvTOCF
}; T$.-{I
qUDz(bFk/
private static Sort[] impl=new Sort[]{ ['}^;Y?*o
new InsertSort(), ^M"=A}h
new BubbleSort(), JXSqtk=
new SelectionSort(), "z#?OV5
new ShellSort(), o {XwLi
new QuickSort(), Y#SmZ*zok
new ImprovedQuickSort(), U>plv
new MergeSort(), |qy"%W@
new ImprovedMergeSort(), \@}$Wjsl
new HeapSort() yhkQFB%gv
}; /|u]Y/ *
PgG |7='
public static String toString(int algorithm){ *a4b`HRT
return name[algorithm-1]; ?CT^Zegmr
} `6BS-AVO7
z?t(+^
public static void sort(int[] data, int algorithm) { CI,`R&=xO
impl[algorithm-1].sort(data); <v7KE*#
} ap'kxOf"1
L(1,W<kYg
public static interface Sort { Er/5 ,
public void sort(int[] data); @+CSY-g$
} iQ]c k-
$vGEY7,
public static void swap(int[] data, int i, int j) { 4Jk}/_
int temp = data; @X6#$ex
data = data[j]; JbC\l
data[j] = temp; Kf?{GNE7
} w[A3;]la
} uQ%HLL-W/