[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; tUR9ti
} 3Q-[)Z )
int i1=l; gJv;{;%
int i2=mid+1; |DZ3=eWZ
for(int cur=l;cur<=r;cur++){ w6w'Jx
if(i1==mid+1) FA#?+kd
data[cur]=temp[i2++]; ! !9l@
else if(i2>r) Er]lObfQo
data[cur]=temp[i1++]; {?zbrgQ<Z
else if(temp[i1] data[cur]=temp[i1++]; 7=gv4arRwt
else 'dFhZ08u}
data[cur]=temp[i2++]; P O{1u%P
} ^3:y<{J
} 5f'<0D;K
$*Z Zh
} PiTe/
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改进后的归并排序: :a#pzEK
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package org.rut.util.algorithm.support; Bt\z0*t=s
i8Y$cac!
import org.rut.util.algorithm.SortUtil; q%Fc?d9
Ad@Odx=o*R
/** y?1<7>L5~
* @author treeroot =cN!h"C[
* @since 2006-2-2 _=\=oC
* @version 1.0 /e0cx:.w
*/ \h&ui]V
public class ImprovedMergeSort implements SortUtil.Sort { :1O1I2L0
0-9.u`)#yu
private static final int THRESHOLD = 10; Z;XiA<|
AvNU\$B4aG
/* <P"4Mk7`s
* (non-Javadoc) D" 4*&
* (3;dtp>Xx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &K*x[
*/ cx(W{O"Jb
public void sort(int[] data) { nfV32D|3
int[] temp=new int[data.length]; mGK-&|gq
mergeSort(data,temp,0,data.length-1); m<cvx3e
} I )LO@
k'd(H5A
private void mergeSort(int[] data, int[] temp, int l, int r) { J^G#x}y
int i, j, k; +-B`Fya
int mid = (l + r) / 2; s.)nS$
if (l == r) eyiGe1^C
return; tKik)ei
if ((mid - l) >= THRESHOLD) `S{Blv
mergeSort(data, temp, l, mid); R1%2]?
else {MaFv
insertSort(data, l, mid - l + 1); l6C^,xU~IX
if ((r - mid) > THRESHOLD) $j\UD8Hj'-
mergeSort(data, temp, mid + 1, r); ~GWn>
else (Wm4JmX%
insertSort(data, mid + 1, r - mid); <%2A, Vz"
EpO5_T_
for (i = l; i <= mid; i++) { t#0/_tD
temp = data; $m:4'r
} D<m+M@u
for (j = 1; j <= r - mid; j++) { D=Pv:)*]
temp[r - j + 1] = data[j + mid]; a V4p0s6ZZ
} (xJZeY)-b^
int a = temp[l]; L,XWX8
int b = temp[r]; jb~/>I^1
for (i = l, j = r, k = l; k <= r; k++) { H$/r{gfg^
if (a < b) { h]#wwJF
data[k] = temp[i++]; 7fOk]Yl[
a = temp; [uh$\s7
} else { | Ts0h?"a
data[k] = temp[j--]; =7Wr
b = temp[j]; g`skmHS89
} r9a?Y!(
} t1I` n(]n
} +6xEz67A<
dUTF0U
/** 06&:X^
* @param data cN{-&\ 6L
* @param l 1f"LAs`%
* @param i ZXf^HK
*/ $1CAfSgKw
private void insertSort(int[] data, int start, int len) { G(puC4 "&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =HF||p@
} {iv!A=jld
} =DhzV D
} '5ZtB<
} D&xbtJd
u'?yc"d>#
堆排序： I#]$H#}Av
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package org.rut.util.algorithm.support; r`Qzn" H
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import org.rut.util.algorithm.SortUtil; }a(x L'F
Y2DR oQ
/** NY5?T0/[
* @author treeroot #l(cBM9sz
* @since 2006-2-2 r2EIhaGF;
* @version 1.0 E! i:h62
*/ !zw)! rV=
public class HeapSort implements SortUtil.Sort{ I\6u(;@
OOEmXb]8
/* (non-Javadoc) SOyE$GoOsx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3zO'=gwJ
*/ 0aMw
public void sort(int[] data) { '~^3 =[Z
MaxHeap h=new MaxHeap(); dnby&-+T
h.init(data); g2=5IU<
for(int i=0;i h.remove(); LDJ=<c!
System.arraycopy(h.queue,1,data,0,data.length); fR>(b?C
} ldJ:A*/M6
E47U &xL
private static class MaxHeap{ JZ[~3swR
QOECpk-
void init(int[] data){ 3q=A35*LT>
this.queue=new int[data.length+1]; w,\#)<boyb
for(int i=0;i queue[++size]=data; o,!r t1&0
fixUp(size); L`yyn/2>
} y7I')}SC
} |]5g+sd
V}#2pP
private int size=0; H4HWr6
x,\PV>
private int[] queue; a*}ZT,V
Z=sCYLm
public int get() { )+[{MR'
return queue[1]; YQ`GOP#/
} 8F(_Vqu
eZ]4,,m
public void remove() { P5+FZzQ
SortUtil.swap(queue,1,size--); 0Ts[IHpg&E
fixDown(1); 5@$b@jTd
} M]?#]3XBNo
file://fixdown "+js7U-
private void fixDown(int k) { -f.<s!a
int j; Tc6H%itV
while ((j = k << 1) <= size) { PrIS L[@
if (j < size %26amp;%26amp; queue[j] j++; !b"#`O%`
if (queue[k]>queue[j]) file://不用交换 E%M~:JuKd?
break; 3_Su5~^
SortUtil.swap(queue,j,k); JLsy|}>
k = j; 8v6YOG"b q
} Efsfuv
} w0x%7mg@
private void fixUp(int k) { UW+|1Bj_:
while (k > 1) { (hefpqpi
int j = k >> 1; #\G{2\R
if (queue[j]>queue[k]) zof>S>5>R7
break; A f@IsCOJ
SortUtil.swap(queue,j,k); 1"r6qYN!>
k = j; )MFa~/x
} ~n#rATbxf
} W@w#A]
Mg.xGST
} L Ty[)
%,rUN+vW
} t)74(
X I\zEXO
SortUtil： YCwfrz
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package org.rut.util.algorithm; xp%,@]p
%+iJpRK)7
import org.rut.util.algorithm.support.BubbleSort; 8t!/Op?
import org.rut.util.algorithm.support.HeapSort; ^tIi;7k
import org.rut.util.algorithm.support.ImprovedMergeSort; "E;]?s9x
import org.rut.util.algorithm.support.ImprovedQuickSort; j_E$C.XU{g
import org.rut.util.algorithm.support.InsertSort; T<\Q4Coth
import org.rut.util.algorithm.support.MergeSort; 2G8f4vsC[
import org.rut.util.algorithm.support.QuickSort; o$>A;<
import org.rut.util.algorithm.support.SelectionSort; }O<u
import org.rut.util.algorithm.support.ShellSort; V.kUFTCvf
![Z'jCpy
/** =<I90j~)
* @author treeroot :]Jwcp
* @since 2006-2-2 #$xiqL
* @version 1.0 0nS69tH
*/ `Td0R!
public class SortUtil { BlQu9{=n
public final static int INSERT = 1; tWYKW3~]
public final static int BUBBLE = 2; mh>)N"
public final static int SELECTION = 3; &[}T41
public final static int SHELL = 4; n83,MV?-
public final static int QUICK = 5; }E+}\&
public final static int IMPROVED_QUICK = 6; )/h~csy:~
public final static int MERGE = 7; xtyzy@)QL
public final static int IMPROVED_MERGE = 8; ( Kh<qAP_n
public final static int HEAP = 9; 4"fiEt,t<x
D}l^ow
public static void sort(int[] data) { 89:Ys=
sort(data, IMPROVED_QUICK); f5+a6s9
} aDuO!?Cm
private static String[] name={ UUy|/z%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }3cOZd_,t
}; _"%ef"oPh
yw`xK2(C$
private static Sort[] impl=new Sort[]{ lL~T@+J~
new InsertSort(), \3(d$_:b
new BubbleSort(), {w.rcObIw+
new SelectionSort(), iCCY222:
new ShellSort(), +5Yc/Qp
new QuickSort(), 2~+_T
new ImprovedQuickSort(), |?0Cm|?
new MergeSort(), A,rgN;5fb
new ImprovedMergeSort(), 2-i>ymoOS
new HeapSort() b(dIl)Y4 :
}; ygr[5Tl
]%m0PU#
public static String toString(int algorithm){ ;JMd(\+-
return name[algorithm-1]; j"*ZS'0
} mXT{)pU
G<,@|6"w
public static void sort(int[] data, int algorithm) { f_X]2in
impl[algorithm-1].sort(data); '/kSUvd
} >(Jy=m?
wxpE5v+f|
public static interface Sort { S`TP#uzKu]
public void sort(int[] data); Bo8+uRF|
} L,0HX
hHF YAh
public static void swap(int[] data, int i, int j) { g?!vRid@S
int temp = data; 3!&lio+<
data = data[j]; ;=1]h&S
data[j] = temp; t0p^0
} <#JJS}TLk
} DoAK]zyJA