[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; EW9b*r7./
} g? I!OG
int i1=l; ?OO%5PSen
int i2=mid+1; ^Po,(iIn
for(int cur=l;cur<=r;cur++){ )-#i8?y3C
if(i1==mid+1) `:gYXeR
data[cur]=temp[i2++]; yU!GS-
else if(i2>r) {\Ys@FF
data[cur]=temp[i1++]; @E(P9zQ/zy
else if(temp[i1] data[cur]=temp[i1++]; V" }*"P-%
else 6lZGcRO
data[cur]=temp[i2++]; WP!il(Gr
} z \^
} Se/ss!If
N-Z^G<[q.
} `fMpV8vv
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改进后的归并排序: `~h0?g
GVZTDrC
package org.rut.util.algorithm.support; + "zYn!0
j"0rkN3$J
import org.rut.util.algorithm.SortUtil; ?cJA^W
F~'sT}A*
/** l{QC}{Ejc2
* @author treeroot SlN"(nq
* @since 2006-2-2 ,@479ZvvR3
* @version 1.0 &~}@u[=ux
*/ vgN@~Xa
public class ImprovedMergeSort implements SortUtil.Sort { fOLnK y#
W W35&mI)k
private static final int THRESHOLD = 10; F#KF6)P
}Q;BQ2[
/* G}q<{<+$
* (non-Javadoc) q55M8B 4w
* \eT/%$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3wo'jOb
*/ c`pYc
public void sort(int[] data) { Cg7)S[zl
int[] temp=new int[data.length]; c~37+^B:
mergeSort(data,temp,0,data.length-1); B/rzh? b
} w#rVSSXQ3
d96fjj~
private void mergeSort(int[] data, int[] temp, int l, int r) { $-e=tWkgv
int i, j, k; ~9bv Wd1D
int mid = (l + r) / 2; 2=O))^8
if (l == r) {F/q{c~]
return; E;$$+rA
if ((mid - l) >= THRESHOLD) ]y}Zi/zh
mergeSort(data, temp, l, mid); :k\}Ik
else <oQ6ZX
insertSort(data, l, mid - l + 1); !x6IV25
if ((r - mid) > THRESHOLD) `}Eh[EOHJ
mergeSort(data, temp, mid + 1, r); lj Y
else #'wL\3
insertSort(data, mid + 1, r - mid); @H6%G>K,
m$)YYpX
for (i = l; i <= mid; i++) { 1NW>wo
temp = data; T"IW Jpc
} 88#N~j~P
for (j = 1; j <= r - mid; j++) { B9AbKK$`
temp[r - j + 1] = data[j + mid]; b70AJe=
} vLr&ay!w
int a = temp[l]; {x|MA(NO
int b = temp[r]; 8'n#O>V@
for (i = l, j = r, k = l; k <= r; k++) { HMhLTl{;
if (a < b) { !@A|L#*
data[k] = temp[i++]; ps"9;4P
a = temp; Vl-D<M+ih
} else { ig+k[`W
data[k] = temp[j--]; 2G H)iUmc
b = temp[j]; :)j7U3u
} |K6nOX!i
} qR_SQ VN
} &hO$4qtN
0:jsV|5B8
/** fG3wc l~
* @param data PMQb\%iE"
* @param l G%Y*q(VrEu
* @param i \_?yzgf
*/ =#jTo|~u4o
private void insertSort(int[] data, int start, int len) { [+_\z',u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i:;$oT
} a!&bc8J7
} ?~{rf:Y
} I{Rz,D uAL
} w8O hJv
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堆排序： ta@ISRK
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package org.rut.util.algorithm.support; &:-GI)[o
C"(_mW{@
import org.rut.util.algorithm.SortUtil; I.UjST
C"k2<IE
/** ~0av3G
* @author treeroot 8qn{
* @since 2006-2-2 g~eJ YS,
* @version 1.0 %s]U@Ku(a
*/ dP?nP(l
public class HeapSort implements SortUtil.Sort{ nMLU-C!t
Sb^add0dT
/* (non-Javadoc) {npOlV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hZ%2?v`
*/ JATS6-Lz`
public void sort(int[] data) { .V7Y2!4TE
MaxHeap h=new MaxHeap(); <1TlW ~q<
h.init(data); !,I7 ?O
for(int i=0;i h.remove(); u<x[5xH+
System.arraycopy(h.queue,1,data,0,data.length); j)<;g(
} b!0'Qidh0
}#1UD
private static class MaxHeap{ er#8D6*
kx:c*3q.k
void init(int[] data){ "4KkKi
this.queue=new int[data.length+1]; X>3iYDe
for(int i=0;i queue[++size]=data; Cm99?K
fixUp(size); l# }As.o}
} cAYa=}~<
} ;OQ#@|D
)Uc$t${en
private int size=0; !."Izz/
]r"31.w(
private int[] queue; CX1L(Y[
.i1jFwOd|G
public int get() { b0!*mrF]6
return queue[1]; lO%MyP
} s@/B*r9
pK-_R#
public void remove() { wgC??Be;ut
SortUtil.swap(queue,1,size--); lpIteZw:
fixDown(1); `i"$*4#<
} #FrwfJOV
file://fixdown C3&17O6
private void fixDown(int k) { "bv,I-\
int j; x8\E~6`,
while ((j = k << 1) <= size) { d/"gq}NT
if (j < size %26amp;%26amp; queue[j] j++; R>Z,TQU
if (queue[k]>queue[j]) file://不用交换 SD)5?{6<
break; aS c#&{
SortUtil.swap(queue,j,k); A@9U;8k
k = j; 6 ,7/8
} ?j &V:kF
} %i;r]z-
private void fixUp(int k) { {JCSR2BB
while (k > 1) { v!WU |=u
int j = k >> 1; M!;`(_2
if (queue[j]>queue[k]) W;xW: -
break; SSl8
SortUtil.swap(queue,j,k); ]2hF!{wc
k = j; RTdD]pE8Q
} ]#vvlM>/
} :DS2zA
R[mH35D/
} }CB=c]p
MAm1w'ol"
} T%M1[<"Q
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SortUtil： j1'xp`jgv
z*??YUT\M
package org.rut.util.algorithm; X ,V= od>
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import org.rut.util.algorithm.support.BubbleSort; U89]?^|bb
import org.rut.util.algorithm.support.HeapSort; :F!dTD$
import org.rut.util.algorithm.support.ImprovedMergeSort; 8:3oH!n
import org.rut.util.algorithm.support.ImprovedQuickSort; YyQf
import org.rut.util.algorithm.support.InsertSort; BN<#x@m$]
import org.rut.util.algorithm.support.MergeSort; V0SW 5 m
import org.rut.util.algorithm.support.QuickSort; =)"NE>
import org.rut.util.algorithm.support.SelectionSort; 8GF[)z&|P:
import org.rut.util.algorithm.support.ShellSort; N"q+UCRC
UUdu;3E=5
/** )A>U<n$h
* @author treeroot Zi[{\7a
* @since 2006-2-2 wiK@o$S-
* @version 1.0 SK2J`*
*/ F^%{ ;
public class SortUtil { w@gl
public final static int INSERT = 1; `? 9]'
public final static int BUBBLE = 2; Z9;nC zHm
public final static int SELECTION = 3; qd#(`%_/
public final static int SHELL = 4; zm;*:]S
public final static int QUICK = 5; s+y'<88
public final static int IMPROVED_QUICK = 6; ne!j%9Ar
public final static int MERGE = 7; YW4bm
public final static int IMPROVED_MERGE = 8; 1pYmtr
public final static int HEAP = 9; 0`g}(}'L
T@d_t
public static void sort(int[] data) { 4 _c:Vl
sort(data, IMPROVED_QUICK); Se;?j-
} e"v[)b++Y
private static String[] name={ 5'{qEZs^QU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :*F3
}; PpJE|[]
V,|Bzcz
private static Sort[] impl=new Sort[]{ \>aa8LOe
new InsertSort(), ^2Fs)19R
new BubbleSort(), &<fRej]v
new SelectionSort(), !~w6"%2+7
new ShellSort(), ?@g;[310`
new QuickSort(), PJSDY1T
new ImprovedQuickSort(), QYf/tQg$
new MergeSort(), Eezlx9b
new ImprovedMergeSort(), $Z(g=nS>
new HeapSort() )\I? EU8
}; Up!ZCZ$RC
<x>k3bD
public static String toString(int algorithm){ 5m%baf2_
return name[algorithm-1]; alb+R$s
} ]"2 v7)e
3-_U-:2"
public static void sort(int[] data, int algorithm) { :xAe<Pq
impl[algorithm-1].sort(data); Z)6nu)
} ZB_16&2Ow
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public static interface Sort { gn[$;*932z
public void sort(int[] data); n_xa)
} <De3mZb
cciAMQhA
public static void swap(int[] data, int i, int j) { @3expC
int temp = data; 5.C[)`_
data = data[j]; P98X[0&
data[j] = temp; :yO,
} ==e#CSJq
} X,JWLS J