[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; r`-8+"P
} fgqCX:SWz
int i1=l; }k.yLcXM
int i2=mid+1; 6"_pCkn;c<
for(int cur=l;cur<=r;cur++){ 1L`V{\_0s
if(i1==mid+1) ,hf W2}
data[cur]=temp[i2++]; ViW2q"4=
else if(i2>r) ]U#of O
data[cur]=temp[i1++]; )"?'~5A
else if(temp[i1] data[cur]=temp[i1++]; w<~[ad}
else f I%8@ :
data[cur]=temp[i2++]; GJWGT`"
} 0=&S?J#!
} H`M|B<.
dw;<Q
} |[~S&
{_!,T%>+1
改进后的归并排序: p"P+8"`
^U?Ac=
package org.rut.util.algorithm.support; F;_c x
yf*'=q
import org.rut.util.algorithm.SortUtil; ^W sgAyCB
</'n={+q
/** 0xZ^ f}@L
* @author treeroot ^P{y^@XI
* @since 2006-2-2 I:t?#)wl
* @version 1.0 ^/2HH
*/ gdCit-3
public class ImprovedMergeSort implements SortUtil.Sort { H*G(`Zl}
?<F([(
private static final int THRESHOLD = 10; &IXmy-w
7#wB
/* yT:2*sZRc
* (non-Javadoc) WZ`i\s1#
* gaC4u,Zb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R1SFMI
*/ n;Mk\*Cg
public void sort(int[] data) { E!ZLVR.K
int[] temp=new int[data.length]; X> 98`
mergeSort(data,temp,0,data.length-1); oAifM1*0
} onmpMU7w
Jqzw94
private void mergeSort(int[] data, int[] temp, int l, int r) { 2ih}?%H8
int i, j, k; Syseiw
int mid = (l + r) / 2; _8r'R
if (l == r) q{V e%8$"
return; /t`|3Mw
if ((mid - l) >= THRESHOLD) e<uf)K=(C
mergeSort(data, temp, l, mid); NL:dyV}
else &*o4~6pQ#
insertSort(data, l, mid - l + 1); ,FP0n
if ((r - mid) > THRESHOLD) i+5Qs-dHA
mergeSort(data, temp, mid + 1, r); 6Br^Ugy
else u ]y[g
insertSort(data, mid + 1, r - mid); ^O<'Qp,[:
ogSDV
for (i = l; i <= mid; i++) { =p5]r:9W
temp = data; {k=3OIp
} KaMg[G
for (j = 1; j <= r - mid; j++) { )-"<19eu
temp[r - j + 1] = data[j + mid]; ]35`N<Ac
} MA_YMxP.'
int a = temp[l]; ]@21KO
int b = temp[r]; q.R(>ZcV
for (i = l, j = r, k = l; k <= r; k++) { uO]|YF
if (a < b) { 59$PWfi-\
data[k] = temp[i++]; ELV~ ayp5
a = temp; I++ Le%w
} else { .Y2Hd$rs
data[k] = temp[j--]; NRG06M
b = temp[j]; q_^yma
} P7T'.|d
} f99"~)B|
} ez9F!1
Py#EjF12
/** #-Mr3
* @param data Wm"q8-<<
* @param l qi~-<qW
* @param i [(g2u@
*/ 2.</n}g
private void insertSort(int[] data, int start, int len) { zOA~<fhT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Uc_}="
} g$2#TWW5
} [;aM8N
} /2d>nj
} 1P"{TMd?
(e5Z^9X
堆排序： ^w%%$9=:r
b3_P??yp
package org.rut.util.algorithm.support; 3n)Kzexh
8mmnnf{P
import org.rut.util.algorithm.SortUtil; 4".I*ij
r[^.\&-
/** ._>03,"
* @author treeroot .7 )oWd!
* @since 2006-2-2 SIm1fC
* @version 1.0 qZE3T:S
*/ A@_>9;
public class HeapSort implements SortUtil.Sort{ ~9APc{"A
jP/Vqe%%8
/* (non-Javadoc) ;=IJHk1&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rSt5@f?
*/ 'hWA&Xx+
public void sort(int[] data) { ` ;mQ"lO
MaxHeap h=new MaxHeap(); #hn
h.init(data); R+ \%
for(int i=0;i h.remove(); d0}(d Gl
System.arraycopy(h.queue,1,data,0,data.length); K"t?
} NAtDt=
BI%~0Gj8
private static class MaxHeap{ -1B.A
6ERMn"[_w
void init(int[] data){ #wT6IU1
this.queue=new int[data.length+1]; x&J\swN9
for(int i=0;i queue[++size]=data; KwMt@1Z
fixUp(size); Fhllqh)
} y@$E5sz
} l="X|t
dHiir&Rd9`
private int size=0; 4x-,l1NMR
K%L6UQ;
private int[] queue; ^S;{;c+'
S'$m3,l(k
public int get() { *7Y#G8 s
return queue[1]; "8uNa
} p*g)-/mA
un!v1g9O
public void remove() { li?@BHEf
SortUtil.swap(queue,1,size--); +\%]<YO
fixDown(1); ox<&T|
} 2G-"HOG
file://fixdown `WCL-OoZc5
private void fixDown(int k) { l=T;hk
int j; |.RyF@N`T
while ((j = k << 1) <= size) { "3]}V=L<5
if (j < size %26amp;%26amp; queue[j] j++; \ ;]{`
if (queue[k]>queue[j]) file://不用交换 #r"|%nOfY
break; h4KMhr
SortUtil.swap(queue,j,k); 2DsP "q79k
k = j; ?5ZvvAi
} &0[L2x}7
} Opf)TAl{
private void fixUp(int k) { ~a3u['B
while (k > 1) { ~vpF|4Zn5
int j = k >> 1; ~.G$0IJY
if (queue[j]>queue[k]) ^{IZpT3
break; ;u(*&vRqr^
SortUtil.swap(queue,j,k); T?[;ej:
k = j; vOCaru?~h
} mX.mX70|J
} Xl2g Hh
3'6 UvAXFH
} w[l#0ZZ
rxMo7px@}I
} =$bF[3D
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SortUtil： 2/t;}pw8
j>\rs|^O
package org.rut.util.algorithm; Z@x&
cs\=8_5
import org.rut.util.algorithm.support.BubbleSort; t 3N}):
import org.rut.util.algorithm.support.HeapSort; t@#5 G* _Q
import org.rut.util.algorithm.support.ImprovedMergeSort; (i(E~^O
import org.rut.util.algorithm.support.ImprovedQuickSort; 2+)h!y]
import org.rut.util.algorithm.support.InsertSort; mh[,E8'd
import org.rut.util.algorithm.support.MergeSort; `{K-eHlrM9
import org.rut.util.algorithm.support.QuickSort; b@4UR<
import org.rut.util.algorithm.support.SelectionSort; !D{z. KO
import org.rut.util.algorithm.support.ShellSort; }m?Ut|
=ZU!i0 K
/** W\Scak>
* @author treeroot `Nvhp]E
* @since 2006-2-2 BcpbS%S
* @version 1.0 GwDOxH'
*/ NWiDNK[VE}
public class SortUtil { 5QXU"kWH
public final static int INSERT = 1; zb[kRo&a0W
public final static int BUBBLE = 2; g%]<sRl:-
public final static int SELECTION = 3; sl$y&C-
public final static int SHELL = 4; (>u1O V
public final static int QUICK = 5; ND?"1/s
public final static int IMPROVED_QUICK = 6; E]&N'+T
public final static int MERGE = 7; %nq<nfDT
public final static int IMPROVED_MERGE = 8; 2P'Vp7f6 Y
public final static int HEAP = 9; :+QNN<
S/pU|zV[
public static void sort(int[] data) { TBJ?8W(
sort(data, IMPROVED_QUICK); euT=]j
} ?(B}w*G~
private static String[] name={ "38<14V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6ZI7V!k
}; O"TVxP:
S=V
private static Sort[] impl=new Sort[]{ Ufi#y<dP
new InsertSort(), @,Dnl v|?
new BubbleSort(), v+sF0 j\P
new SelectionSort(), n{<@-6
new ShellSort(), AIQ {^:
new QuickSort(), {U3jJ#K
new ImprovedQuickSort(), \pK&gdw
new MergeSort(), ?Q=(?yR0]
new ImprovedMergeSort(), am.d^'
new HeapSort() ;}S_PnwC@
}; k 75 p
6 mLC{X[
public static String toString(int algorithm){ =&"pG`x
return name[algorithm-1]; qgEzK
} r^"sZk#
fM]nP4K`
public static void sort(int[] data, int algorithm) { G='`*_$
impl[algorithm-1].sort(data); .^F&6'h1H
} U{lf$
`aX+Gz?
public static interface Sort { DtGkhq;
public void sort(int[] data); W2$rC5|
} 7g{JE^u
pcscNUp
public static void swap(int[] data, int i, int j) { r/NaoIrJV
int temp = data; *1b0IQ$g
data = data[j]; ;XZN0A2
data[j] = temp; B$JPE7h@[P
} 9dszn^]T
} mqJD+ K