[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; 6 ">oo-
} fMB4xbpD
int i1=l; 6bJ"$o
int i2=mid+1; O<a3DyUa;
for(int cur=l;cur<=r;cur++){ m~Me^yt>}
if(i1==mid+1) nh|EZp]
data[cur]=temp[i2++]; Spc&X72I
else if(i2>r) W]~ZkQ|P
data[cur]=temp[i1++]; 2;R/.xI6v
else if(temp[i1] data[cur]=temp[i1++]; W^ClHQ"Iy
else `1_FQnm)
data[cur]=temp[i2++]; *(VbPp_H_
} ^8\Y`Z0%
} DJJZJ}7
h*waRD
} *cy.*@d
`7>K1slQ}S
改进后的归并排序: ws().IZ
eU"mG3__
package org.rut.util.algorithm.support; G,/Gq+WX
eu=|t&FKk
import org.rut.util.algorithm.SortUtil; q"p#H8
!pV<n
/** 1G_xP^H!
* @author treeroot a}GAB@YI
* @since 2006-2-2 Vd[2u
* @version 1.0 ;y,NC2Xj
*/ <mn-=#)
public class ImprovedMergeSort implements SortUtil.Sort { &X7ttB"#h
vF+YgQ1H
private static final int THRESHOLD = 10; t*rp3BIG
EUXV/QV{
/* iGyVG41U
* (non-Javadoc) 4Q/r[x/&C
* A<;0L . J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I &cX8Tw
*/ C*]AL/
public void sort(int[] data) { n\ Gg6Y
int[] temp=new int[data.length]; eFes+i(35
mergeSort(data,temp,0,data.length-1); 5GUH;o1m
} wz)m{:b<
}RH lYN
private void mergeSort(int[] data, int[] temp, int l, int r) { hX %s]"
int i, j, k; TR|;,A[%v#
int mid = (l + r) / 2; ZG!x$yi$
if (l == r) R$v i!0
return; _=)!xnYf
if ((mid - l) >= THRESHOLD) ;,FT&|3o
mergeSort(data, temp, l, mid); O<Jwaap
else B_b8r7Vn`
insertSort(data, l, mid - l + 1); d[yrNB6|
if ((r - mid) > THRESHOLD) r \9:<i8
mergeSort(data, temp, mid + 1, r); 2;O c^
else T?ZOHH8
insertSort(data, mid + 1, r - mid); %pd5w~VP
?#U0eb5u
for (i = l; i <= mid; i++) { 0\QYf0o
temp = data; IZ|c<#r6
} dV$3u"9
for (j = 1; j <= r - mid; j++) { "C?:T'dW
temp[r - j + 1] = data[j + mid]; rkbl/py
} 5~*=#v:`
int a = temp[l]; x ru(Le}E
int b = temp[r]; F: f2s:<
for (i = l, j = r, k = l; k <= r; k++) { ?UU5hek+m
if (a < b) { {kT#o3,>w6
data[k] = temp[i++]; pFS F[9?e>
a = temp; $/MY,:*e
} else { T27:"LVw
data[k] = temp[j--]; K@y-)I2]
b = temp[j]; J,MT^B
} gjO *h3`
} (tgEa{rPAP
} WvIK=fdZ$
x0y%\
/** cvn-*Sj
* @param data s_x=^S3~LO
* @param l Cb+P7[X-
* @param i `6dy U_f
*/ #!(Zn:[
private void insertSort(int[] data, int start, int len) { A!n~8zcmp}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X9p+a,
} aA7S'[NjB
} Yjpb+}
} ;|2Uf
} S6=\r{V
27}.s0{D
堆排序： 4u7c7K>\Y
m>g}IX&K'
package org.rut.util.algorithm.support; o:p{^D@#k
(D:KqGqoT
import org.rut.util.algorithm.SortUtil; tzx:*
Rs`Vr_?Hk
/** +>n.T
* @author treeroot hB?U5J
* @since 2006-2-2 wn&[1gBxM
* @version 1.0 DX]z=d)tc
*/ 4da^d9ZOy
public class HeapSort implements SortUtil.Sort{ cYBrRTrI#
4Sd+"3M
/* (non-Javadoc) 1Kp?bwh"u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0V{>)w!Fo
*/ $%lHj+(
public void sort(int[] data) { g{rt^B
MaxHeap h=new MaxHeap(); lr)G:I#|
h.init(data); $IZ*|>(
for(int i=0;i h.remove(); s0x@ u
System.arraycopy(h.queue,1,data,0,data.length); qpH j4
} /&y,vkZTT
@^w!% ?J
private static class MaxHeap{ ][s*~VK;
>b[4
void init(int[] data){ !pE>O-| K
this.queue=new int[data.length+1]; q8&4=eV\A
for(int i=0;i queue[++size]=data; H620vlC}V
fixUp(size); D/+@d:-G
} T\<M?`Y
} PX+"" #
p\4h$."
private int size=0; NZC<m$')
U"jUMOMZ;
private int[] queue; <m|FccvQ
s>[vT?
public int get() { >KH(nc$
return queue[1]; [ni-UNTv
} @y&h4^)z
q[T_*X3o
public void remove() { EbHUGCMO
SortUtil.swap(queue,1,size--); 7`j|tb-
fixDown(1); O&gy(
} )wyu+_:
file://fixdown N^@%qUvT]
private void fixDown(int k) { ur,V>J<5A
int j; gK]T}
while ((j = k << 1) <= size) { bCe[nmE2
if (j < size %26amp;%26amp; queue[j] j++; oW\Q>c7 =
if (queue[k]>queue[j]) file://不用交换 rzc 3k~@
break; fb;hf:B:
SortUtil.swap(queue,j,k); U O{xpY
k = j; d1C/u@8^
} )%-\hl]
} 4cv|ok8P
private void fixUp(int k) { ]lG_rGw
while (k > 1) { E!O(:/*
int j = k >> 1; kiBOyC!r6
if (queue[j]>queue[k]) r' 97\|
break; r(`8A:#d
SortUtil.swap(queue,j,k); jHUz`.8B
k = j; g/J^K*3]
} <3J=;.\6
} d-_93
kG~ivB}x
} "X!_37kQ
-&HoR!af
} [{Klv&>_/
o9(#KC?3
SortUtil： 8tB{rK,
NR@SDW
package org.rut.util.algorithm; Xj(k(>7V
LT y@6*
import org.rut.util.algorithm.support.BubbleSort; [jG uO%
import org.rut.util.algorithm.support.HeapSort; P89Dg/P
import org.rut.util.algorithm.support.ImprovedMergeSort; b_"V%<I
import org.rut.util.algorithm.support.ImprovedQuickSort; |<5J
import org.rut.util.algorithm.support.InsertSort; ~T{d9yNW1
import org.rut.util.algorithm.support.MergeSort; UVvt&=+4
import org.rut.util.algorithm.support.QuickSort; _s=Pk[e
import org.rut.util.algorithm.support.SelectionSort; 1&x0+~G
import org.rut.util.algorithm.support.ShellSort; %'p|JS
Sd/d [
/** LqH?3):
* @author treeroot &nY2u-Q
* @since 2006-2-2 GO&RR}
* @version 1.0 xf3/<x!B
*/ jDkc~Wwa
public class SortUtil { vzgudxG'z
public final static int INSERT = 1; !{|yAt9kP
public final static int BUBBLE = 2; x,@O:e
public final static int SELECTION = 3; 34&$_0zn
public final static int SHELL = 4; c_j)8
public final static int QUICK = 5; FnU{C=P
public final static int IMPROVED_QUICK = 6; I "+|cFq.
public final static int MERGE = 7; 62KW HB9S
public final static int IMPROVED_MERGE = 8; I$sm5oL
public final static int HEAP = 9; EXScqGa]
G5Dji_|
public static void sort(int[] data) { 5w-G]b
sort(data, IMPROVED_QUICK); I.n{ "=$B@
} S4AB tKG
private static String[] name={ Fb`7aFIf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aWi]t'_
}; IBsO
]q\=
private static Sort[] impl=new Sort[]{ '$&(+>)z`
new InsertSort(), h;h,dx
new BubbleSort(), iH -x
new SelectionSort(), P#'DGW&W0
new ShellSort(), \6PIw-)
new QuickSort(), g\mrRZ/?
new ImprovedQuickSort(), SGT-B.
new MergeSort(), "}Sid+)<
new ImprovedMergeSort(), */@bNT9BgO
new HeapSort() XVK[p=cIL
}; c`[uQXv
(/UMi,Ho
public static String toString(int algorithm){ k>@^M]%
return name[algorithm-1]; 97=YFK~*
} Ab|NjY:
MjeI?k}LJ
public static void sort(int[] data, int algorithm) { #esu@kMU`
impl[algorithm-1].sort(data); rzY@H }u
} %EhU!K#[
)#TJw@dNf^
public static interface Sort { ?&bVe__
public void sort(int[] data); EYj2h .k
} "r(pK@h
Vste$V
public static void swap(int[] data, int i, int j) { D +%k1
int temp = data; InGbV+ I
data = data[j]; lbXkZ,
data[j] = temp; Z.#glmw^=R
} oXOO 10
} 4OgGZ