[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; w2$ L;q
} 2C0j.Ib
int i1=l; 2SC'Z>A
int i2=mid+1; p;[.&oJ
for(int cur=l;cur<=r;cur++){ H/f}tw
if(i1==mid+1) i Q3wi
data[cur]=temp[i2++]; K[SzE{5=P
else if(i2>r) ldG8hK
data[cur]=temp[i1++]; HJr*\%D}1
else if(temp[i1] data[cur]=temp[i1++]; MPp:EH
else (*26aMp
data[cur]=temp[i2++]; YTgT2w
} GDj_+G;tO\
} [)IaXa
>yyu:dk-;
} &xj40IZ
4YOLy\"S
改进后的归并排序: X"8$,\wX,
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package org.rut.util.algorithm.support; +Kmxo4p
M#o=.,
import org.rut.util.algorithm.SortUtil; Q0PqyobD
C _W]3
/** Q#*qPgs
* @author treeroot P^-x
* @since 2006-2-2 Ty 6XU!
* @version 1.0 %[,^2s
*/ O[ans_8
public class ImprovedMergeSort implements SortUtil.Sort { ?`*`A9@
Pi&\GMzd
private static final int THRESHOLD = 10; /|Gz<nSc
&=8ZGjR< }
/* $ z+ =lF
* (non-Javadoc) Z\-Gr 2k
* 7|m{hSc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8Z@O%\1x6
*/ ;r;>4+zn\
public void sort(int[] data) { e mq%" ;.
int[] temp=new int[data.length]; esTK4z]
mergeSort(data,temp,0,data.length-1); ']Km%uwL
} /[3!kW
0Oq5;5
private void mergeSort(int[] data, int[] temp, int l, int r) { m[5ed1+
int i, j, k; lKirc2
int mid = (l + r) / 2; UR`pZ.U?
if (l == r) @[(%b{TE;
return; :Ea]baM"
if ((mid - l) >= THRESHOLD) {-IRX)m*
mergeSort(data, temp, l, mid); YkV-]%c
else %D^j7`Z
insertSort(data, l, mid - l + 1); :)e/(I]
if ((r - mid) > THRESHOLD) Yh%
mergeSort(data, temp, mid + 1, r); $L"-JNS
else piUfvw
insertSort(data, mid + 1, r - mid); <>1*1%m
~m'8BK
for (i = l; i <= mid; i++) { 3~0Xe
temp = data; 4p&SlJ
} nYY'hjZ
for (j = 1; j <= r - mid; j++) { aG1[85:,\i
temp[r - j + 1] = data[j + mid]; c_2kHT
} RK]."m0c~#
int a = temp[l]; '$OLU[(Y
int b = temp[r]; LZ9IE>sj
for (i = l, j = r, k = l; k <= r; k++) { 6~+?DIc
if (a < b) { *Oe;JqQkK
data[k] = temp[i++]; Lop=._W
a = temp; VM ny>g&3
} else { XN'X&J
data[k] = temp[j--]; [TpW$E0H
b = temp[j]; #lm1"~`5
} 7W#9ki1
} w*N9p8hb]
} QeAkuqT'[
)2,\Y
/** HYk*;mD
* @param data #^/&fdK~A
* @param l Fx*IeIs(:~
* @param i mCpoaGV_
*/ Q ?W6
private void insertSort(int[] data, int start, int len) { }oTac
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gs|%3k|
} cXokq
} -1u N Z{0
} Z.0^:rVp~
} >G+?X+9
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堆排序： 6{I5 23g
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package org.rut.util.algorithm.support; aKCXV[PO
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import org.rut.util.algorithm.SortUtil; Uz!cVs?-
7,"1%^tU
/** xF{<-b
* @author treeroot =M9Od7\J
* @since 2006-2-2 'W j Q
* @version 1.0 .es= w=
*/ }FRyG%
public class HeapSort implements SortUtil.Sort{ Icf@uQ6
_zO,VL
/* (non-Javadoc) 0?j+d8*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) STB=#z
*/ oM-@B'TK
public void sort(int[] data) { 4d3PF`,H`
MaxHeap h=new MaxHeap(); 7"y"%+*/
h.init(data); MgLz:2 :F
for(int i=0;i h.remove(); qx/GioPU
System.arraycopy(h.queue,1,data,0,data.length); /m*vY`
} akQtre`5sd
Hw/1~O$T
private static class MaxHeap{ /T*]RO4%>]
G>{;@u
void init(int[] data){ Rf\>bI<.
this.queue=new int[data.length+1]; T[eTT]Z{Ia
for(int i=0;i queue[++size]=data; TM':G9n
fixUp(size); ]IkjZ=
} !NYc!gYD
} Z;i^h,j?$1
UeT"v?zP
private int size=0; P>kS$U)
XH2g:$
private int[] queue; GL1!Z3
66%kq[
public int get() { \d%SC<s
return queue[1]; bLoYg^T/
} }qXi;u))
*-Y|qS%
public void remove() { 4oOe
SortUtil.swap(queue,1,size--); I)O-i_}L&K
fixDown(1); cEw/F0
} {N;XjV1x
file://fixdown 5kJ>pb$/
private void fixDown(int k) { Md[nlz
int j; ?(U> )SvF
while ((j = k << 1) <= size) { U1rh[A>
if (j < size %26amp;%26amp; queue[j] j++; Y6fU;
if (queue[k]>queue[j]) file://不用交换 JX/rAnc@
break; 9!FV.yp%F
SortUtil.swap(queue,j,k); zYj8\iER
k = j; Q_1EAxt
} Vo(d)"m?
} +]|J
private void fixUp(int k) { 8F4#E U
while (k > 1) { nS'0i&<{1
int j = k >> 1; 12E@9s$Z
if (queue[j]>queue[k]) +2W#=G
break; 8'#%7+ "=!
SortUtil.swap(queue,j,k); R{6.O+j`
k = j; Tj*zlb4
} -D.6@@%Kc}
} JT<Ia
>1mCjP
} o,Ew7~u
XUUS N
} Khw!+!(H
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SortUtil： Q:kpaMA1P
%r~TMU2"
package org.rut.util.algorithm; /5r[M=_ihr
.f&,~$e4
import org.rut.util.algorithm.support.BubbleSort; I[<C)IG
import org.rut.util.algorithm.support.HeapSort; 35jP</
import org.rut.util.algorithm.support.ImprovedMergeSort; sOLo[5y'
import org.rut.util.algorithm.support.ImprovedQuickSort; F/RV{} 17E
import org.rut.util.algorithm.support.InsertSort; }(TZ}* d
import org.rut.util.algorithm.support.MergeSort; o&LNtl;
import org.rut.util.algorithm.support.QuickSort; UmQ 9_H7
import org.rut.util.algorithm.support.SelectionSort; tp*AA@~
import org.rut.util.algorithm.support.ShellSort; $+[HJ{
)n|:9hc
/** HcQ{ok9u
* @author treeroot ~"}-cl,
* @since 2006-2-2 {v]A`u)
* @version 1.0 c+|,2e 0T
*/ %qfEFhRC
public class SortUtil { >48zRi\N
public final static int INSERT = 1; I#S6k%-'
public final static int BUBBLE = 2; 0Km{fZYq7;
public final static int SELECTION = 3; {?BxVDD07
public final static int SHELL = 4; |'=R`@w~0
public final static int QUICK = 5; 2lHJ&fck<
public final static int IMPROVED_QUICK = 6; ='OPU5(;O
public final static int MERGE = 7; a*S4rq@
public final static int IMPROVED_MERGE = 8; R[Kyq|UyVr
public final static int HEAP = 9; KH2a 2
^i#q{@g
public static void sort(int[] data) { cD2}EqZ 9
sort(data, IMPROVED_QUICK); o $p*C
} 0xC{Lf&
private static String[] name={ ](-:l6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yHk/8
}; /_woCLwQ#
=1yU& PJ
private static Sort[] impl=new Sort[]{ hMeE@Q0
new InsertSort(), Kv!CL9^LX7
new BubbleSort(), PS!f&IY}[.
new SelectionSort(), WQ=C5^u
new ShellSort(), ~N_\V
new QuickSort(), ;l5F il,3
new ImprovedQuickSort(), <q%buyQna
new MergeSort(), +:wOzTUN
new ImprovedMergeSort(), RP z0WP
new HeapSort() m_Z%[@L
}; p?=rQte([
tX&Dum$
public static String toString(int algorithm){ @+:S'mAQC
return name[algorithm-1]; "F}anPY
} KDwjck"5;
L&Bc-kMH
public static void sort(int[] data, int algorithm) { N 0&h5
impl[algorithm-1].sort(data); EM;]dLh
} -GDX#A-J
xv9SQ,n<
public static interface Sort { HpuHJ#l
public void sort(int[] data); X@5!I+u\L
} 5A Vo#}&\
*" >ek k
public static void swap(int[] data, int i, int j) { NHPpHY3^.
int temp = data; -?&wD["y
data = data[j]; ZVR0Kzu?Ra
data[j] = temp; S3`zB?7,
} ke2'?,f
} {1>V~e8t