[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; 0F|AA"mMT
} ~ga`\%J
int i1=l; 4V==7p x(
int i2=mid+1; )Es"LP]
for(int cur=l;cur<=r;cur++){ 7:3$Ey
if(i1==mid+1) &twf,8
data[cur]=temp[i2++]; s,n0jix@
else if(i2>r) jvFTR'R)=
data[cur]=temp[i1++]; vIwCJN1C
else if(temp[i1] data[cur]=temp[i1++]; ,7NZu0
else : b~6i%b
data[cur]=temp[i2++]; M9@ri^x
} rKf-+6Na
} c|62jY"$-2
rJ{O(n]j
} [P7N{l=I
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改进后的归并排序: e\JojaV
9Fm"ei
package org.rut.util.algorithm.support; Kt|1&Gk
ct,l^|0Hu8
import org.rut.util.algorithm.SortUtil; glXZZ=j
`Ru3L#@
/** -'BA{#e}L
* @author treeroot ?Poq2
* @since 2006-2-2 UHxE)]J
* @version 1.0 !M]\I&
*/ $3uKw!z
public class ImprovedMergeSort implements SortUtil.Sort { i?e`:}T
hQHnwr
private static final int THRESHOLD = 10; c#]q^L\x
'n$%Ls}S
/* MxcFvo*LCp
* (non-Javadoc) %v7[[U{T
* wqW0v\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CL}{mEr}
*/ 3UQ;X**F
public void sort(int[] data) { B7<Kc
int[] temp=new int[data.length]; QtqfG{
mergeSort(data,temp,0,data.length-1); Bk\Gj`"7
} Bv.`R0e&
1=a>f"cyf
private void mergeSort(int[] data, int[] temp, int l, int r) { DHT&,=
int i, j, k; !i%"7tQ3$
int mid = (l + r) / 2; 3LTcEd
if (l == r) z)=+ F]
return; TkO[rAC
if ((mid - l) >= THRESHOLD) -yg?V2
mergeSort(data, temp, l, mid); ]$\|ktY!
else ld7v3:M
insertSort(data, l, mid - l + 1); $gM8{.!
if ((r - mid) > THRESHOLD) )){9&5,0:
mergeSort(data, temp, mid + 1, r); #I3$3^0i#
else u@%r
insertSort(data, mid + 1, r - mid); P7f,OY<@%o
D.6,VY H
for (i = l; i <= mid; i++) { la?Wnw
temp = data; Z@%HvB7
} b(I2m
for (j = 1; j <= r - mid; j++) { 3#45m+D
temp[r - j + 1] = data[j + mid]; %F*|;o7s
} \yGsr Bl
int a = temp[l]; G>+1*\c
int b = temp[r]; {?}*1,I
for (i = l, j = r, k = l; k <= r; k++) { R?EASc!b
if (a < b) { ^@_m "^C
data[k] = temp[i++]; fn/7wO$!
a = temp; ?[MsQQd~
} else { o!r8{L
data[k] = temp[j--]; }O4se"xK
b = temp[j]; vHE^"l5v
} ?`Y\)'}
} o(Cey7
} D*Q.G8(
|J~eLh[d
/** DK&h eVIoZ
* @param data M8b4NF_&
* @param l ;|cTHGxbE
* @param i |uH%6&\
*/ "uPy,<l
private void insertSort(int[] data, int start, int len) { *+b6B_u]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <_./SC
} *$M'`vj:
} .~gl19#:T
} *X38{rj
} g3%t8O/M
^R$'eG 4L?
堆排序： /+3a n9h
p=QYc)3F
package org.rut.util.algorithm.support; jUqy8q&
l~Lb!;,dN
import org.rut.util.algorithm.SortUtil; S|GWcSg
8%~t
/** oAZh~~tp
* @author treeroot >uI$^y1D
* @since 2006-2-2 ~H}en6Rc
* @version 1.0 I6LD)?
*/ )OsLrq/
public class HeapSort implements SortUtil.Sort{ (HN4g;{
Yp4c'Zk
/* (non-Javadoc) 2PSTGG8JV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n!He&
*/ )DUL)S
public void sort(int[] data) { mi2o1"Jd$`
MaxHeap h=new MaxHeap(); ?&l)W~S
h.init(data); fj'jNE
for(int i=0;i h.remove(); ]wuy_+$
System.arraycopy(h.queue,1,data,0,data.length); n`;R pr&
} zSjgx_#U
,c)g,J9
private static class MaxHeap{ y^FOsr
emA!Ew(g
void init(int[] data){ qSO*$1i
this.queue=new int[data.length+1]; czBi Dk4
for(int i=0;i queue[++size]=data; }1%r%TikY
fixUp(size); u=qPzmywt
} C/v}^#cLD
} (=T$_-Dj`}
hWcTI{v
private int size=0; /4joC9\AB
8t.dPy<
private int[] queue; qvLDfN
|j_`z@7(
public int get() { a`Z{ xme=
return queue[1]; %3a|<6
} $ehg@WK}.
:J(sXKr[C
public void remove() { S>ugRasZ$
SortUtil.swap(queue,1,size--); *PM}"s
fixDown(1); a%~yol0wO7
} TvrwVL)
file://fixdown M<qudi
private void fixDown(int k) { XS0V:<+,
int j; d]M[C[TOX
while ((j = k << 1) <= size) { Y5jYmP<
if (j < size %26amp;%26amp; queue[j] j++; \mXqak,y
if (queue[k]>queue[j]) file://不用交换 Gm&2R4)EP
break; o?!uX|Fy
SortUtil.swap(queue,j,k); :z~!p~
k = j; 9)Yw :
} J#7(]!;F
} ,ZK]i CGk
private void fixUp(int k) { zeTszT)
while (k > 1) { z`'P>.x
int j = k >> 1; ^"tqdeCb=
if (queue[j]>queue[k]) _ +KmNfR
break; `$9L^Yg,4
SortUtil.swap(queue,j,k); q$^<zY
k = j; ?0npEz|
} >i8~dEbB
} h3h8lt_|
mG}k 3e-
} *o|p)lH
~_}4jnC
} h>tsis'N9
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SortUtil： )[DpK=[N^p
Y\u_+CG*
package org.rut.util.algorithm; \DyKtrnm%
3*\8p6G
import org.rut.util.algorithm.support.BubbleSort; O<a3DyUa;
import org.rut.util.algorithm.support.HeapSort; *eoq=,O
import org.rut.util.algorithm.support.ImprovedMergeSort; -wIM0YJ
import org.rut.util.algorithm.support.ImprovedQuickSort; 2))t*9;h
import org.rut.util.algorithm.support.InsertSort; u-M] Az-
import org.rut.util.algorithm.support.MergeSort; x9\J1\
import org.rut.util.algorithm.support.QuickSort; ={xqNRVd
import org.rut.util.algorithm.support.SelectionSort; 83xd@-czgh
import org.rut.util.algorithm.support.ShellSort; *cy.*@d
s'AQUUrb<
/** G,/Gq+WX
* @author treeroot Hc /wta
* @since 2006-2-2 )x9]xqoR
* @version 1.0 9T]va]w?#
*/ 2q|_Dma
public class SortUtil { ;<VR2U`
public final static int INSERT = 1; vF+YgQ1H
public final static int BUBBLE = 2; x/[8Wi,yB
public final static int SELECTION = 3; Z c<]^QR
public final static int SHELL = 4; %8g$T6E[<2
public final static int QUICK = 5; e Ri!\Fx
public final static int IMPROVED_QUICK = 6; ;HT0w_,
public final static int MERGE = 7; =G[H,;W
public final static int IMPROVED_MERGE = 8; M;> ha,x
public final static int HEAP = 9; HWOek"}Z[
`-5cQ2>"
public static void sort(int[] data) { #VQ36pCd
sort(data, IMPROVED_QUICK); qY# m*R
} \4C)~T:*
private static String[] name={ Fv;u1Atiw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]P JH'=
}; NywB3
@<VG8{
private static Sort[] impl=new Sort[]{ Ep,1}Dx
new InsertSort(), \v.HG] /u
new BubbleSort(), Y<de9Z@
new SelectionSort(), ^v#+PyW
new ShellSort(), "C?:T'dW
new QuickSort(), THb A(SM
new ImprovedQuickSort(), a_xQ~:H
new MergeSort(), %~ ;nlDw
new ImprovedMergeSort(), {kT#o3,>w6
new HeapSort() j}i,G!-u
}; >_n:_
9#s,K! !3{
public static String toString(int algorithm){ 'et(:}i
return name[algorithm-1]; aYqqq|
} NEZH<#
a"MTQFm'
public static void sort(int[] data, int algorithm) { ]w5ji
impl[algorithm-1].sort(data); nm<L&11
} Qu!OV]Cc
axHxqhO7zp
public static interface Sort { YNuewD
public void sort(int[] data); eOO!jrT:
} Y=PzN3
m>g}IX&K'
public static void swap(int[] data, int i, int j) { mxtlr)
int temp = data; 6(!,H<bON
data = data[j]; r[Zg 2
data[j] = temp; R:SIs\%o
} 1x^W'n,HtK
} -i| /JH