[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; iXDQ2&gE*
} 5CuK\<
int i1=l; /A) v$Bv=
int i2=mid+1; `?L-{VtM3*
for(int cur=l;cur<=r;cur++){ v]HiG_C
if(i1==mid+1) 0yxMIX
data[cur]=temp[i2++]; $0K%H
else if(i2>r) D;Jb'Be
data[cur]=temp[i1++]; ywV8s|o
else if(temp[i1] data[cur]=temp[i1++]; g$*VA} s
else ]=g|e
data[cur]=temp[i2++]; W[3)B(Vq<E
} IK-E{,iKc
} 6'6@VB
<WGl4#(k
} !&Q3>8l
KCed!OJ+
改进后的归并排序: \$h LhYz-
#YSUPO%F
package org.rut.util.algorithm.support; <&'r_m
-ijQTB
import org.rut.util.algorithm.SortUtil; a4}2^K
b\w88=|
/** c#e_Fs
* @author treeroot 5!*5mtI
* @since 2006-2-2 VQvl,'z
* @version 1.0 QPfS3%p`
*/ G K @]61b
public class ImprovedMergeSort implements SortUtil.Sort { 0ZV)Y<DJ
Cs %-f"
private static final int THRESHOLD = 10; ^q,KRut
}x1mpPND
/* #7U,kTj9
* (non-Javadoc) [hS?d.D
* ?Ib/}JST
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) puv*p%E
*/ J7.bFW'
public void sort(int[] data) { OR^Wd
int[] temp=new int[data.length]; 0n,5"B
mergeSort(data,temp,0,data.length-1); q$`:/ ehw
} fwRlqfi
?8(`tS(_?
private void mergeSort(int[] data, int[] temp, int l, int r) { WL}6YSC
int i, j, k; tGd<{nF%2
int mid = (l + r) / 2; Hk\+;'PrN
if (l == r) @X/S h:
return; Rhx7eU#&
if ((mid - l) >= THRESHOLD) !o4xI?
mergeSort(data, temp, l, mid); xM;gF2
else h{sW$WA
insertSort(data, l, mid - l + 1); KX)xCR~
if ((r - mid) > THRESHOLD) Vrz!.X~
mergeSort(data, temp, mid + 1, r); );z}T0C
else =tH+e7it
insertSort(data, mid + 1, r - mid); A0rdQmrOL
NI(`o8fN
for (i = l; i <= mid; i++) { J6[x(T
temp = data; Xt=&
} _u;^w}0
for (j = 1; j <= r - mid; j++) { Xx|&%b{{r
temp[r - j + 1] = data[j + mid]; z[v5hhI)4
} vtmO
int a = temp[l]; i?AZ|Ha[
int b = temp[r]; |-_5ouN.
for (i = l, j = r, k = l; k <= r; k++) { >W'SG3Hmc
if (a < b) { fsjA7)/
data[k] = temp[i++]; y=vH8D]%X
a = temp; YC=BP5^
} else { ;*W]]4fy
data[k] = temp[j--]; g@Ni!U"_c
b = temp[j]; m4Wn$Z
} YF>t{|
} .4!N#'
} fe37T@
{C]M]b*F6(
/** D?\K~U* >
* @param data d;<n [)@
* @param l FYcMvY
* @param i N@MeaO
*/ )1fQhdO}x
private void insertSort(int[] data, int start, int len) { z}bnw2d]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z{#F9'\&
} NxXVW
} Msd!4TrBJ
} |}M']Vz
} q<yH!
iQ9#gPk_9
堆排序： {my=Li<_H
u=E?N:I~F
package org.rut.util.algorithm.support; Q5,@P?
(FjgnsW
import org.rut.util.algorithm.SortUtil; "]_|c\98
zi?'3T%Ie
/** %o"Rcw|
* @author treeroot 7t04!dD}
* @since 2006-2-2 6ZG)`u".("
* @version 1.0 #dpt=
*/ W;N/Y3Lb
public class HeapSort implements SortUtil.Sort{ L|q<Bpz
D} .t
/* (non-Javadoc) 'o7PIhD"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tJwF h6
*/ D@^F6am%
public void sort(int[] data) { Pm1 " 0
MaxHeap h=new MaxHeap(); /M3D[aR<d
h.init(data); GwW#Ww;Oc
for(int i=0;i h.remove(); 9iFe^^<ss
System.arraycopy(h.queue,1,data,0,data.length); Nr[Rp
} k( g$_ ]X
_"sRL}-Z
private static class MaxHeap{ JA{YdB;il
CD&m4^X5D
void init(int[] data){ Vd?v"2S(9
this.queue=new int[data.length+1]; /B!m|)h5~
for(int i=0;i queue[++size]=data; pt4xUu{
fixUp(size); *cf"l
} vfv5ex(
} WD\{Sdx:r
b}4/4Z.
private int size=0; Iv<9})2K
t<|s&
private int[] queue; ^J RTi'v
Yjl0Pz.q
public int get() { eurudl
return queue[1]; kW!:bh
} 4jz]c"p-
@}?D<O8#"#
public void remove() { V^{!d}
SortUtil.swap(queue,1,size--); {6n \532@
fixDown(1); `e9uSF:9C
} bvgD;:Aj
file://fixdown .]e6TFsrO
private void fixDown(int k) { :7ngVc
int j; 1ZL_;k
while ((j = k << 1) <= size) { cLU*Tx\
if (j < size %26amp;%26amp; queue[j] j++; -$)Et|
if (queue[k]>queue[j]) file://不用交换 K%}I}8M
break; {T.Vu]L80
SortUtil.swap(queue,j,k); D9C}Dys
k = j; NNE,| :
} Ozv.;}SE
} Uu X"AFy~\
private void fixUp(int k) { e1loI8
while (k > 1) { Dq?HUb^X
int j = k >> 1; )A0&16<
if (queue[j]>queue[k]) 0w['jh|,
break; :b;1P@W<
SortUtil.swap(queue,j,k); Tqa4~|6
k = j; u-9t s
} +2}(]J=-
} M0zD)@
(d;(FBk='
} 8-5jr_*
#Q@6:bBzv
} a1`cI5n
nh=Us^xD
SortUtil： <PN;D#2bh
Ql@yN@V
package org.rut.util.algorithm; ZY!pw6R1>*
V3W85_*
import org.rut.util.algorithm.support.BubbleSort; G r|@CZq
import org.rut.util.algorithm.support.HeapSort; -NPkN%h
import org.rut.util.algorithm.support.ImprovedMergeSort; c2\vG
import org.rut.util.algorithm.support.ImprovedQuickSort; -b)zira
import org.rut.util.algorithm.support.InsertSort; rgzI
import org.rut.util.algorithm.support.MergeSort; <M OL{jan
import org.rut.util.algorithm.support.QuickSort; CDYx/yO
import org.rut.util.algorithm.support.SelectionSort; W79A4l<
import org.rut.util.algorithm.support.ShellSort; ;]M67ma7C
_O;~ }N4u
/** px>>]>ZMH
* @author treeroot JGDUCb~
* @since 2006-2-2 6J-}&U
* @version 1.0 'HWgvmw(
*/ !(_xu{(DL
public class SortUtil { H8BO*8}
public final static int INSERT = 1; q7 oR9
public final static int BUBBLE = 2; .&x?`pER
public final static int SELECTION = 3; :ZfUjqRE
public final static int SHELL = 4; '}`hY1v
public final static int QUICK = 5; ptcLJ]+)
public final static int IMPROVED_QUICK = 6; !$xEX,vj|W
public final static int MERGE = 7; K}=8:BaUL
public final static int IMPROVED_MERGE = 8; y [9}[NMZ
public final static int HEAP = 9; \Tf{ui
/N]Ow
public static void sort(int[] data) { Mr NOcx&
sort(data, IMPROVED_QUICK); e3={$Ah
} ls"\YSq$
private static String[] name={ ?*R^?[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :iQ^1S`pH
}; aho<w+l@
FV6he[,
private static Sort[] impl=new Sort[]{ txfwLqx
new InsertSort(), )]b@eGNGj
new BubbleSort(), `?o1cf A
new SelectionSort(), mz VuQ
new ShellSort(), !+45=d 5
new QuickSort(), r{!"%03H_
new ImprovedQuickSort(), _IKP{WNB
new MergeSort(), 9Oo*8wvGG
new ImprovedMergeSort(), uCP6;~Ns
new HeapSort() "p~]m~g
}; Fma`Cm.
KpbZnW}g
public static String toString(int algorithm){ LJNie*
return name[algorithm-1]; gjegzKU
} mf]( 3ZL
@2~O^5[>
public static void sort(int[] data, int algorithm) { aC8,Y$>?E`
impl[algorithm-1].sort(data); }M9DqZ;I
} &^3~=$
[%iUg\'7d
public static interface Sort { KG-k$glD
public void sort(int[] data); @Uj_+c q
} x:n9dm
zsMw5C
public static void swap(int[] data, int i, int j) { "'}v0*[
int temp = data; %hQMC'c
data = data[j]; vBnKu
data[j] = temp; SCh7O}
} IGK_1@tq
} bDZKQ&