[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; YZ[%uArm
} R|t;p!T
int i1=l; #,P(isEZ"
int i2=mid+1; $GF&x>]]
for(int cur=l;cur<=r;cur++){ @Qo,p
if(i1==mid+1) A1<k1[5fJ
data[cur]=temp[i2++]; {mYx
else if(i2>r) #'NY}6cb$
data[cur]=temp[i1++]; <R~KM=rL
else if(temp[i1] data[cur]=temp[i1++]; Cj$H[K}>
else P|N?OocE
data[cur]=temp[i2++]; tQ0=p| T]
} [s %\.y(q
} y#r\b6
p#M!S2&z
} 3o7xN=N
4qBY%1
改进后的归并排序: :bw6k
3"B+xbe=
package org.rut.util.algorithm.support; ' C6:e?R
U$$3'n
import org.rut.util.algorithm.SortUtil; 8DT@h8tA
?zE<
/** 4[H,3}p9H
* @author treeroot jf7pl8gv
* @since 2006-2-2 Y\>\[*.v
* @version 1.0 !47A$sQ
*/ ;@'0T4Z&l
public class ImprovedMergeSort implements SortUtil.Sort { x9\J1\
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private static final int THRESHOLD = 10; ./)j5M
g)N54WV
/* (lb`#TTGx
* (non-Javadoc) .9I_NG
* r1hD %a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eU"mG3__
*/ G,/Gq+WX
public void sort(int[] data) { eu=|t&FKk
int[] temp=new int[data.length]; 'Ix5,^M}B
mergeSort(data,temp,0,data.length-1); g$gVm:=
} Q^q=!/qQ
a}GAB@YI
private void mergeSort(int[] data, int[] temp, int l, int r) { Vd[2u
int i, j, k; |3|wdzV
int mid = (l + r) / 2; 7rPLnB]
if (l == r) YrKFa%k
return; 5EfY9}dl
if ((mid - l) >= THRESHOLD) S r[IoF)
mergeSort(data, temp, l, mid); 9 G((wiE
else z.A4x#>-
insertSort(data, l, mid - l + 1); ty9rH=1
if ((r - mid) > THRESHOLD) Z#@6#S`
mergeSort(data, temp, mid + 1, r); 5#BF,-Jv
else >VypE8H]x
insertSort(data, mid + 1, r - mid); 9$EHK
r)%4-XeV
for (i = l; i <= mid; i++) { c_[ JjG^?P
temp = data; XNK 43fkB.
} e)br`CD%
for (j = 1; j <= r - mid; j++) { M;> ha,x
temp[r - j + 1] = data[j + mid]; |H<|{{E
} *\C}Ok=
int a = temp[l]; }RH lYN
int b = temp[r]; <f[9ju
for (i = l, j = r, k = l; k <= r; k++) { +%x^RV}
if (a < b) { *+&z|Pwv[^
data[k] = temp[i++]; hxP6C6S
a = temp; w4`!Te
} else { `GP3D~
data[k] = temp[j--]; Ckw83X
b = temp[j]; S{Rh'x\B
} H.)fOctbO
} IS .g);Gj
} t0+t9w/fTP
2kC^7ZAwu
/** [gTQ-
* @param data V~JBZ}`TG<
* @param l *(>Jd|C
* @param i '>"`)-
*/ }[ 7Nb90v
private void insertSort(int[] data, int start, int len) { Mn-<51.%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _y|[Z;
} AK%=DVkM
} R+k=Ea&x
} a_xQ~:H
} d!w1t=2H
0%#t[usY
堆排序： EP/&m|o|G
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package org.rut.util.algorithm.support; fHW-Je7mG
%!>k#F^S
import org.rut.util.algorithm.SortUtil; fdg[{T4:
XlE$.
/** osI- o~#>
* @author treeroot J: L-15
* @since 2006-2-2 5X0_+DdeL
* @version 1.0 u2f `|+1^y
*/ bbM4A! N
public class HeapSort implements SortUtil.Sort{ .Y+mwvLpRG
\-DM-NrZ1U
/* (non-Javadoc) sTJJE3TBI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cF-Jc}h
*/ U<1}I.hDJ
public void sort(int[] data) { +'!h-x1y~
MaxHeap h=new MaxHeap(); :17ee
h.init(data); 7 _X&5ni
for(int i=0;i h.remove(); ;|2Uf
System.arraycopy(h.queue,1,data,0,data.length); +k#mvPq
} k0gJ('zah
Vj#%B.#Zbf
private static class MaxHeap{ &8R-C[A
(*LTqC
void init(int[] data){ oBhL}r
this.queue=new int[data.length+1]; 6(!,H<bON
for(int i=0;i queue[++size]=data; GZ;Z
fixUp(size); <m-Ni
} hB?U5J
} wn&[1gBxM
-Pv P
private int size=0; g-4gI\
4;B=Qoxe
private int[] queue; /5Gnb.zN)
1uK)1%vK
public int get() { =?y^O0v
return queue[1]; NdaVT5RB
} _:oMyK'
cL-6M^!a
public void remove() { c%o5E%
SortUtil.swap(queue,1,size--); I^6c0`
fixDown(1); 7{?lEQ&UE
} \"<GL;
file://fixdown yQ72v'
private void fixDown(int k) { D'U\]'.
int j; +H5 jRw
while ((j = k << 1) <= size) { F#zQQ)(Pf
if (j < size %26amp;%26amp; queue[j] j++; nS?S6G5h
if (queue[k]>queue[j]) file://不用交换 m-Mhf;
break; PX+"" #
SortUtil.swap(queue,j,k); p\4h$."
k = j; Br_3qJNVP
} 2b{@]Fp
} ylo]`Nq
private void fixUp(int k) { TXY
while (k > 1) { AX!Md:s
int j = k >> 1; /3xFd)|Ds
if (queue[j]>queue[k]) 7$E2/@f
break; %3#b6m~
SortUtil.swap(queue,j,k); CNpCe-%&
k = j; EbHUGCMO
} 7`j|tb-
} O&gy(
P,s)2s'nZ
} #t5JUi%in*
>d1aE)?
} {|t?
|\yDgs%EGy
SortUtil： 7z0;FW3>9
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package org.rut.util.algorithm; X"]mR7k
?w|\7T.?
import org.rut.util.algorithm.support.BubbleSort; URj% J/jD
import org.rut.util.algorithm.support.HeapSort; hfP(N_""S
import org.rut.util.algorithm.support.ImprovedMergeSort; VH$\ a~|
import org.rut.util.algorithm.support.ImprovedQuickSort; `UzCq06rJ1
import org.rut.util.algorithm.support.InsertSort; F~11 _
import org.rut.util.algorithm.support.MergeSort; TLR Lng
import org.rut.util.algorithm.support.QuickSort; ul]m>W
import org.rut.util.algorithm.support.SelectionSort; $)WH^Ir~
import org.rut.util.algorithm.support.ShellSort; 1{Sx V
d@`-!"
/** qrORP3D@
* @author treeroot }VJ hw*s
* @since 2006-2-2 Ezo" f
* @version 1.0 kG~ivB}x
*/ "X!_37kQ
public class SortUtil { -&HoR!af
public final static int INSERT = 1; "1pZzad
public final static int BUBBLE = 2; b W`)CWd
public final static int SELECTION = 3; `s|\"@2
public final static int SHELL = 4; k-t,y|N
public final static int QUICK = 5; f(zuRM^5
public final static int IMPROVED_QUICK = 6; (\AszLW
public final static int MERGE = 7; iIC9rso"Q1
public final static int IMPROVED_MERGE = 8; U iPVZ@?
public final static int HEAP = 9; f/|a?n2\hm
}T^v7 LY
public static void sort(int[] data) { |x}&wFV
sort(data, IMPROVED_QUICK); )gm\e?^
} ek_i{'hFd
private static String[] name={ d,E/9y\e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" & t@
}; rUJSzLy
ygu?w7
private static Sort[] impl=new Sort[]{ '~!l(&X
new InsertSort(), +&@l{x(,
new BubbleSort(), GO&RR}
new SelectionSort(), xf3/<x!B
new ShellSort(), jDkc~Wwa
new QuickSort(), vzgudxG'z
new ImprovedQuickSort(), pQ6t]DJ4
new MergeSort(), PhaQ3%
new ImprovedMergeSort(), %%H. &*i,
new HeapSort() itvy[b-*
}; 4pOc`
M KE[Yb?
public static String toString(int algorithm){ <=LsloI
return name[algorithm-1]; 8~XI7g'5x
} wNlV_
H#d! `
public static void sort(int[] data, int algorithm) { w2mlqy2L
impl[algorithm-1].sort(data); [pyXX>:M
} j4hUPL7
,_7tRkn
public static interface Sort { r+WPQ`Ar
public void sort(int[] data); [zO(V`S2
} <\#
^SelqX
public static void swap(int[] data, int i, int j) { 1\9BO:<K
int temp = data; Y)-)NLLG;n
data = data[j]; #'{PYr
data[j] = temp; laIC}!
} PT5ni6
} eWt>^]H~