[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; e+NWmu{<_
} :.C+?$iuX
int i1=l; @IEI%vH
int i2=mid+1; R(M}0JRm
for(int cur=l;cur<=r;cur++){ W0VA'W
if(i1==mid+1) ggerh#
data[cur]=temp[i2++]; [Xxw]C6\>(
else if(i2>r) l\K%
data[cur]=temp[i1++]; |$YyjYK
else if(temp[i1] data[cur]=temp[i1++]; `)rg|~#k
else 5Waw?1GL
data[cur]=temp[i2++]; JaH* rDs-
} e{v,x1Y_z(
} ^dFhg_GhF
\BN|?r$a
} LiiK3!^i
"nVK< Vd
改进后的归并排序: R ^HohB
Zw2jezP@t
package org.rut.util.algorithm.support; zl0;84:H
mG0L !5
import org.rut.util.algorithm.SortUtil; /m97CC#+
S$S_nNq
/** l*$WX=h6n
* @author treeroot Q}WL/X5
* @since 2006-2-2 6a7vlo
* @version 1.0 ?lF mXZy`
*/ aL88E
public class ImprovedMergeSort implements SortUtil.Sort { J cP~-cp
r])Z9bbi
private static final int THRESHOLD = 10; V{43HA10b
g+e:@@ug
/* I!61 K
* (non-Javadoc) XFtOmY
* DLU[<!C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b2G2cL-(
*/ z9^c]U U)E
public void sort(int[] data) { U9x4j_.q
int[] temp=new int[data.length]; >H$;Z$o*(
mergeSort(data,temp,0,data.length-1); }6<)yW}U
} v5B" A"N
w2k<)3 g~
private void mergeSort(int[] data, int[] temp, int l, int r) { xsYE=^uv
int i, j, k; ]Qd{ '}+
int mid = (l + r) / 2; Jth=.9mrM
if (l == r) )^&,Dj
return; J`W-]3S#
if ((mid - l) >= THRESHOLD) \WcB9
mergeSort(data, temp, l, mid); kQy&I3
else 5!tb$p#z
insertSort(data, l, mid - l + 1); `{DG;J03[
if ((r - mid) > THRESHOLD) p<q].^M
mergeSort(data, temp, mid + 1, r); CldDr<k3
else b"Zq0M0l
insertSort(data, mid + 1, r - mid); *_PPrx5
)AJ=an||5
for (i = l; i <= mid; i++) { vm|!{5l:=y
temp = data; I'dj.
} `%oIRuYG]j
for (j = 1; j <= r - mid; j++) { 3I]Fdp)'
temp[r - j + 1] = data[j + mid]; 7(NXCAO81
} +tIz[+u
int a = temp[l]; (|dPeix|
int b = temp[r]; nx B32
for (i = l, j = r, k = l; k <= r; k++) { -3` "E%9
if (a < b) { a&C.=
data[k] = temp[i++]; ^Z#@3=
a = temp; jQ?LHUE
} else { +1/b^Ac
data[k] = temp[j--]; tfA}`*$s
b = temp[j]; +TF8WZZF.d
} S.W^7Ap
} qi&D+~Gv!
} 'PpZ/ry$
XMw.wQ'?
/** a8zZgIV
* @param data qU-!7=}7
* @param l 1q]&7R
* @param i 'B`#:tX^N
*/ O:e#!C8^
private void insertSort(int[] data, int start, int len) { p,;mYms
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); AWT"Y4Ie
} +I@cO&CY|
} (ii(yz|
} RLHYw@-j@
} y(}Eko4u5
?mU\ N0o
堆排序： TF\sP8>V
kYlg4 .~M
package org.rut.util.algorithm.support; Sy
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import org.rut.util.algorithm.SortUtil; c+2sT3).D
kiX%3(
/** #tDW!Xv?
* @author treeroot EnJ!mr
* @since 2006-2-2 f-D>3qSS
* @version 1.0 H\#:,s{1
*/ 1 i3k
public class HeapSort implements SortUtil.Sort{ |')-VhLLK
oHX$k{6
/* (non-Javadoc) rwgsXS8W6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mU@xcN
*/ 5)M2r!\
public void sort(int[] data) { ARWZ; GX
MaxHeap h=new MaxHeap(); sS9%3i/>
h.init(data); n8u*JeN
for(int i=0;i h.remove(); j?-R]^-5
System.arraycopy(h.queue,1,data,0,data.length); #epy%>
} HnU Et/
;^3$kF
private static class MaxHeap{ 1'O0`Me>#
jg_n7
void init(int[] data){ W&C-/O,m
this.queue=new int[data.length+1]; -5k2j^r;
for(int i=0;i queue[++size]=data; N wtg%;
fixUp(size); o`6|ba
} A,#2^dR
} _Y!sVJ){,c
_~M^ uW^l
private int size=0; XUSvhr$|
Oy_c
private int[] queue; -^SA8y
'Cc(3
public int get() { zwr\:Hu4
return queue[1]; $$1qF"GF
} e:-8k_0|
lddp^ #f
public void remove() { b{5K2k&,
SortUtil.swap(queue,1,size--); }V`mp
fixDown(1); ^Z}Ob= .G
} VQxpN 1
file://fixdown PDP[5q r
private void fixDown(int k) { ao$.6X8fQ
int j; x0Z5zV9
while ((j = k << 1) <= size) { k \qiF|B)Z
if (j < size %26amp;%26amp; queue[j] j++; rU2iy"L
if (queue[k]>queue[j]) file://不用交换 JTW)*q9a
break; g^~Kze
SortUtil.swap(queue,j,k); ?c#$dc"
k = j; \Fb| {6+
} n&Yk<
} #T3h}=
private void fixUp(int k) { XDz5b.,
while (k > 1) { t"AzI8O
int j = k >> 1; la^ DjHA$
if (queue[j]>queue[k]) 23ze/;6%A
break; pq!%?m]
SortUtil.swap(queue,j,k); !#x=JX
k = j; z#Nl@NO&
} Tg ?x3?kw
} K :LL_,
6Bt=^~d
} yR71%]*.
%[QV,fD'E
} 0 P|&Pq&IH
K_BPZ5w
SortUtil： 7;}l\VXHm
L;6.r3bL
package org.rut.util.algorithm; TMVryb
Oejq@iM"(
import org.rut.util.algorithm.support.BubbleSort; SpSnoVI
import org.rut.util.algorithm.support.HeapSort; =zg:aTMti
import org.rut.util.algorithm.support.ImprovedMergeSort; s8gU7pT49
import org.rut.util.algorithm.support.ImprovedQuickSort; q6q1\YB
import org.rut.util.algorithm.support.InsertSort; qE7R4>5xjO
import org.rut.util.algorithm.support.MergeSort; x"4%(xBu
import org.rut.util.algorithm.support.QuickSort; =Agg_h
import org.rut.util.algorithm.support.SelectionSort; ANMg
import org.rut.util.algorithm.support.ShellSort; ,?-\ x6
]!{y a8
/** Ff4*IOZ}(
* @author treeroot 9.+/~$Ht
* @since 2006-2-2 SZ!=`a]
* @version 1.0 C;rG]t^%
*/ mY&ud>,U:
public class SortUtil { )j&"%[2F
public final static int INSERT = 1; )g1a'G
public final static int BUBBLE = 2; RMXzU
public final static int SELECTION = 3; I$q>
public final static int SHELL = 4; Rm>^tu -
public final static int QUICK = 5; g /+oZU
public final static int IMPROVED_QUICK = 6; &jQ?v@|1c
public final static int MERGE = 7; 6XV<? 9q
public final static int IMPROVED_MERGE = 8; % 4 ~l
public final static int HEAP = 9; !.X.tc
E l&h;N
public static void sort(int[] data) { ~Gv#iRi>
sort(data, IMPROVED_QUICK); .0y%5wz8j
} }iN2KeLAF
private static String[] name={ : mGAt[Cc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6LUC!Sh
}; Qo0H
m6n!rRQ^U
private static Sort[] impl=new Sort[]{ X]*QUV]i
new InsertSort(), MtmOUI&'
new BubbleSort(), e 9$C#D>D
new SelectionSort(), 2z0n<`
new ShellSort(), \ZXLX'-
new QuickSort(), kJK,6mN
new ImprovedQuickSort(), Xa9TS"
new MergeSort(), \c`oy=qY0
new ImprovedMergeSort(), CQg X=!q
new HeapSort() ]Uc`J8p,
}; ZU&"73
3/6/G}s
public static String toString(int algorithm){ '?*g%Yuz
return name[algorithm-1]; -7]Xjb5
} W0`Gc {
]> !<G8=N
public static void sort(int[] data, int algorithm) { 0lk;F
impl[algorithm-1].sort(data); C'mL&
} s4= "kT]
t,%iL
public static interface Sort { f^Bc
public void sort(int[] data); LJzH"K[Gg6
} vP-M,4c
6vzk\n
public static void swap(int[] data, int i, int j) { k!XhFWb
int temp = data; Ju` [m
data = data[j]; L):qu
data[j] = temp; vq'c@yw;
} 748CD{KxW
} +{`yeZ9S