[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; zV\\T(R)
} NhyVX%qt:
int i1=l; m4{F-++dk
int i2=mid+1; yz}Agc4.I
for(int cur=l;cur<=r;cur++){ F:.rb Ei
if(i1==mid+1) (gQ^jmZPG
data[cur]=temp[i2++]; DFKU?#R
else if(i2>r) c|[:vin
data[cur]=temp[i1++]; qALlMj--m
else if(temp[i1] data[cur]=temp[i1++]; /s3AZ j9
else m$xL#omD
data[cur]=temp[i2++]; -MV</
} ST3aiyG
} gG0P &9xz
Kc+;"4/#q
} <@9p|[!
=PiDZS^"
改进后的归并排序: HTK79 +
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package org.rut.util.algorithm.support; g&y'#,'Q~,
)6#dxb9
import org.rut.util.algorithm.SortUtil; e%w>QN`
~y%8uHL:
/** KH)(xB=
* @author treeroot XUmL8
* @since 2006-2-2 % (R10G
* @version 1.0 {O,D9<
*/ pOlo_na}[
public class ImprovedMergeSort implements SortUtil.Sort { ~9JU_R^%m
6D,xs}j1
private static final int THRESHOLD = 10; UH1AT#?!W
@~0kSA7
/* 3A%/H`
* (non-Javadoc) `#&pB0.y
* .7TQae%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) > $0eRVL
*/ "ZDc$v:Qa
public void sort(int[] data) { N.OC _H&
int[] temp=new int[data.length]; wkK61ah6
mergeSort(data,temp,0,data.length-1); 0[@9f1Nk4
} c#M'Mye
]q DhGt
private void mergeSort(int[] data, int[] temp, int l, int r) { aJlSIw*Q,
int i, j, k; Be+CV">2
int mid = (l + r) / 2; zXQo pQ1
if (l == r) ">]v'h(s
return; +U9Gj#
if ((mid - l) >= THRESHOLD) DTrS9j?z
mergeSort(data, temp, l, mid); n*G[ZW*Uc
else 2Q`@lTUv
insertSort(data, l, mid - l + 1); _4iTP$7[
if ((r - mid) > THRESHOLD) TSXa#SKp
mergeSort(data, temp, mid + 1, r); ru,]!YPJE2
else 5;5;bBo~
insertSort(data, mid + 1, r - mid); mAh0xgm
/gZrnd?
for (i = l; i <= mid; i++) { Qhb].V{utV
temp = data; 0UeDM*
} SovK|b&
for (j = 1; j <= r - mid; j++) { ,Ju f
temp[r - j + 1] = data[j + mid]; qepsR/0M
} l$D]*_ jc,
int a = temp[l]; u1a5Vtel
int b = temp[r]; rMIr&T
for (i = l, j = r, k = l; k <= r; k++) { ,@ A1eX}
if (a < b) { sXp>4MomV
data[k] = temp[i++]; Mi&,64<
a = temp; =s`\W7/;{-
} else { 1UX"iOx(
data[k] = temp[j--]; 59gt#1k
b = temp[j]; jPg8>Z&D
} EzOO6
} 2@ vSe
} -M}#-qwf
;u!qu$O
/** 0Qvbc}KP8
* @param data ]YQ[ )
* @param l Uj&2'>MJ$
* @param i B Jp\a7`;
*/ k`Nc<nN8
private void insertSort(int[] data, int start, int len) { l`8S1~j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1a4HThDXP
} ?ihkV?;)
} 7ET^,6
} pASNiH698
} VH7VJ [
#y13(u,dN
堆排序： iLw O4i
wvsKnYKX
package org.rut.util.algorithm.support; Ub=g<MYHV
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import org.rut.util.algorithm.SortUtil; {LfVV5?
4VINu9\V
/** ko\VDyt,
* @author treeroot s@sRdoTdF
* @since 2006-2-2 k"F5'Od
* @version 1.0 b=v
*/ mY?^]3-_
public class HeapSort implements SortUtil.Sort{ {#N](yUm
#UL:#pY
/* (non-Javadoc) 22S4q`j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }I<r=?
*/ rLO1Sv
public void sort(int[] data) { wjW>#DE
MaxHeap h=new MaxHeap(); so}(*E&(a
h.init(data); 6j{9\ R
for(int i=0;i h.remove(); pMM,ox"
System.arraycopy(h.queue,1,data,0,data.length); f$$l,wo
} $}&Y$w>S
]2\|<.
private static class MaxHeap{ _]8FCO
j#d=V@=a
void init(int[] data){ {_QXx
this.queue=new int[data.length+1]; Gqq%q!k&1
for(int i=0;i queue[++size]=data; aOWW..|
fixUp(size); @~%R%Vu
} 9,\b$?9
} |D<J9+
~*RG|4#
private int size=0; Br.$:g#
hN*,]Z{
private int[] queue; uu L"o
c'nEbelE
public int get() { /tI8JXcUK
return queue[1]; O@r%G0Jge
} UN#XP$utY
~pA_E!3W
public void remove() { dC8$Ql^<
SortUtil.swap(queue,1,size--); "!()yjy
fixDown(1); =Tv|kJ| j
} ?t++IEoP
file://fixdown SskvxH+7
private void fixDown(int k) { f*KNt_|:
int j; [:<CgU9C
while ((j = k << 1) <= size) { KM$Lu2
if (j < size %26amp;%26amp; queue[j] j++; /NfuR$oMd
if (queue[k]>queue[j]) file://不用交换 }SYR)eE\
break; Iko1%GJ1Z
SortUtil.swap(queue,j,k); U_ n1QU
k = j; *TQXE:vZ[
} $5kb3x<W
} DXu915
private void fixUp(int k) { FrBoE#
while (k > 1) { 6lw)L
int j = k >> 1; Q qGf*
if (queue[j]>queue[k]) 0`%eP5
break; \M0-$&[+Z
SortUtil.swap(queue,j,k); P34UD:
k = j; 21'I-j
} tE3#Uq
} ^`>,~$Q
/f_w@TR\{
} 3lzjY.]Pgv
CY~]lQ
} xl [3*K
3)\jUVuj
SortUtil： U;QTA8|!&
dbM~41C6
package org.rut.util.algorithm; ssaEAm:
Ji4xor
import org.rut.util.algorithm.support.BubbleSort; Cw7 07
import org.rut.util.algorithm.support.HeapSort; jMv qKJ(<
import org.rut.util.algorithm.support.ImprovedMergeSort; -|;{/ s5
import org.rut.util.algorithm.support.ImprovedQuickSort; -xs@rV`
import org.rut.util.algorithm.support.InsertSort; q5C(/@)^
import org.rut.util.algorithm.support.MergeSort; ~L\KMB/9e=
import org.rut.util.algorithm.support.QuickSort; #MkXio; h
import org.rut.util.algorithm.support.SelectionSort; -X+G_rY
import org.rut.util.algorithm.support.ShellSort; %(lr.9.]H
R-8>,
/** rTTde^^_
* @author treeroot iAD'MB
* @since 2006-2-2 6.%M:j00E
* @version 1.0 Xg+Eeg#
*/ kI7c22OJ
public class SortUtil { kT6h}d^/^
public final static int INSERT = 1; jb;!"HC
public final static int BUBBLE = 2; ]@E_Hx{S
public final static int SELECTION = 3; mQEE?/xX;
public final static int SHELL = 4; +KV?W+g)`
public final static int QUICK = 5; NG3!09eY
public final static int IMPROVED_QUICK = 6; }e$^v*16
public final static int MERGE = 7; XY %er
public final static int IMPROVED_MERGE = 8; :[![9JS/
public final static int HEAP = 9; y4sKe:@2
}-YM>q
public static void sort(int[] data) { JSz;>
sort(data, IMPROVED_QUICK); *IBT!@*Q&
} SSG57N-T
private static String[] name={ fz/Ee1T\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y%<y`]I
}; j9Qd 45
`pr$l
private static Sort[] impl=new Sort[]{ 7#/->Y
new InsertSort(), a#3+PB#
new BubbleSort(), Ws;S=|9,7~
new SelectionSort(), ='r86vq
new ShellSort(), Ff6l"A5
new QuickSort(), +/xmxh$ $
new ImprovedQuickSort(), l~ 3H"
new MergeSort(), )[S~W 35
new ImprovedMergeSort(), ^`M,ju
new HeapSort() 2J?ON|2M
}; xvo""R/g8
pJ8;7u
public static String toString(int algorithm){ U\OfB'Dn
return name[algorithm-1]; TCShS}q;%
} z[Sq7bbYO
2gP^+.
public static void sort(int[] data, int algorithm) { `^FAD
impl[algorithm-1].sort(data); k;EG28
} r?cDyQE
K4w %XVaH
public static interface Sort { =QdHji/sB
public void sort(int[] data); RRSkXDU}
} W5 l)mAv
iczJXA+
public static void swap(int[] data, int i, int j) { vNdMPulr{
int temp = data; <'(O0
data = data[j]; _(A9k{
data[j] = temp; 2;8I0BH*'
} [l~Gwaul>
} ;MSdTHN"