[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; ^8fO3<Jg
} T.K$a\/{,
int i1=l; aEL6-['(
int i2=mid+1; Ex<-<tY
for(int cur=l;cur<=r;cur++){ kB :")$
if(i1==mid+1) fE^rTUtn
data[cur]=temp[i2++]; VBd.5YW
else if(i2>r) RrRCT.+E
data[cur]=temp[i1++]; $cK9E:v
else if(temp[i1] data[cur]=temp[i1++]; zL7+HY*3o
else nR ,j1IUF
data[cur]=temp[i2++]; ^KlMBKWyB
} j~L{=ojz%
} nE/T)[1|
t`Hwq
} xpSMbX{e
y#T":jpR
改进后的归并排序: *_^AK=i
nQ/El&{
package org.rut.util.algorithm.support; Sc*p7o: A
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import org.rut.util.algorithm.SortUtil; 'zpj_QM
5HJ6[.HO
/** f+F /`P%
* @author treeroot `Th!bk
* @since 2006-2-2 98V9AOgk
* @version 1.0 |yqx ]
*/ %Rg84tz
public class ImprovedMergeSort implements SortUtil.Sort { }l_) d
ph3[}><6
private static final int THRESHOLD = 10; b$M? _<G
]Oe#S"-Oo
/* 4}=]QQoE
* (non-Javadoc) thUs%F.5?
* [81k4kU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9]d$G$Kv9
*/ -i 6<kF-W
public void sort(int[] data) { WE=`8`Li
int[] temp=new int[data.length]; RAxA H
mergeSort(data,temp,0,data.length-1); 1?mQ fW@G
} !".@Wg$
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private void mergeSort(int[] data, int[] temp, int l, int r) { :~`E@`/
int i, j, k; sV{[~U,|
int mid = (l + r) / 2; !d"J,.)
if (l == r) 9ft7
return; ,.F,]m=
if ((mid - l) >= THRESHOLD) uTn(fs)D
mergeSort(data, temp, l, mid); 'n.ATV,
else pU}>}
insertSort(data, l, mid - l + 1); O </<
if ((r - mid) > THRESHOLD) 7@C:4c@0
mergeSort(data, temp, mid + 1, r); Grkj@Q*
else b-~Gt]%>m
insertSort(data, mid + 1, r - mid); 8$@gAlI^
{{giSW'
for (i = l; i <= mid; i++) { LN_6>u
temp = data; _H%ylAt1j
} l-M~e]
for (j = 1; j <= r - mid; j++) { Kb{
temp[r - j + 1] = data[j + mid]; L,\ Yj
} f}#pKsX.
int a = temp[l]; +EkZyM~z2
int b = temp[r]; HnU}Lhjzj
for (i = l, j = r, k = l; k <= r; k++) { @(oz`|*
if (a < b) { 8l)^#"ySA
data[k] = temp[i++]; $ V}s3
a = temp; \@tt$ m%
} else { f{ENSUtCrR
data[k] = temp[j--]; ESb
b = temp[j]; %*:-4K
} n,n]V$HFGh
} 7GE.>h5
} a^~l[HSF
MW`q*J`Yo
/** M~P}80I
* @param data %6*xnB?
* @param l 1<ZvHv
* @param i }vp\lKP
*/ <7u*OYjA
private void insertSort(int[] data, int start, int len) { _ @ \
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .Ml}cE$L
} ]cFqKs
} RqH"+/wR
} Rs5G5W@"A
} nj #Ab
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堆排序： /__we[$E
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package org.rut.util.algorithm.support; P ,5P6Y9
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import org.rut.util.algorithm.SortUtil; +9,"ne1'e
ym<G.3%1
/** Z2hRTJJ[A
* @author treeroot G#n27y nh
* @since 2006-2-2 Bd)Qz(>rw
* @version 1.0 h6la+l?x
*/ bL{wCo-Y
public class HeapSort implements SortUtil.Sort{ -F@Rpfrj_#
\jZvP`.2
/* (non-Javadoc) ^!N_Nx/M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6z!?U:bT
*/ tAc[r)xFw
public void sort(int[] data) { ZuILDevMD
MaxHeap h=new MaxHeap(); u;;]S!:M
h.init(data); ~Ui<y=d
for(int i=0;i h.remove(); g]z,*d
System.arraycopy(h.queue,1,data,0,data.length); |Pwb7:a3
} [2.pZB
4k<4=E
private static class MaxHeap{ (fb&5=Wzw
C6:<.`iD87
void init(int[] data){ !x|OgvJ
this.queue=new int[data.length+1]; 'mG[#M/Y
for(int i=0;i queue[++size]=data; )\'U$
fixUp(size); [ gx<7}[
} 3[aCy4O
} P+,\x&Vr
ep>S$a*|
private int size=0; U!^\DocAY
Kh'/Ne?
private int[] queue; fqFE GyeNr
)m \}ITf
public int get() { ES}@mO
return queue[1]; W}.;]x%1B
} WF-B=BRZ
r4A%`sk@
public void remove() { 8%> Ls
SortUtil.swap(queue,1,size--); O=u.PRNT8
fixDown(1); 69TQHJ[
} Y)g<> }F
file://fixdown xG\&QE
private void fixDown(int k) { *ZF7m_8u{
int j; fQ'P2$
while ((j = k << 1) <= size) { #V*<G#B
if (j < size %26amp;%26amp; queue[j] j++; =H3 JRRS
if (queue[k]>queue[j]) file://不用交换 OGrp{s
break; cAV9.VS<L
SortUtil.swap(queue,j,k); 2*F["E
k = j; _ B",? }
} ID E3>D
} F+v?2|03
private void fixUp(int k) { d]$z&E
while (k > 1) { |:L<Ko
int j = k >> 1; _:?)2NV
if (queue[j]>queue[k]) ]aXCi"fMs
break; ^SVdaQ{7
SortUtil.swap(queue,j,k); i~PN(h
k = j; l7 j3;Ly
} 3[pA:Z+xx
} 2BsMFMIw1
I[WW1P5
} rwv_ RN
2.Th29]
} tB8XnO_c
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SortUtil： H&6lQ30/)
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package org.rut.util.algorithm; #Kn=Q
E<>n0",
import org.rut.util.algorithm.support.BubbleSort; (Lo<3a-]
import org.rut.util.algorithm.support.HeapSort; Jou~>0,/j
import org.rut.util.algorithm.support.ImprovedMergeSort; m .le' &
import org.rut.util.algorithm.support.ImprovedQuickSort; -r_z,h|
import org.rut.util.algorithm.support.InsertSort; 5E+l5M*(
import org.rut.util.algorithm.support.MergeSort; c<r`E
import org.rut.util.algorithm.support.QuickSort; 2_ <
import org.rut.util.algorithm.support.SelectionSort; 90Jxn'>^
import org.rut.util.algorithm.support.ShellSort; `LEk/b1(P
(iIJ[{[H4)
/** =X2 Ieb
* @author treeroot (|Y[5O)
* @since 2006-2-2 [^A93F
* @version 1.0 {ckA
*/ ]}<wS]1
public class SortUtil { ?tQUZO
public final static int INSERT = 1; "AS;\-Jk
public final static int BUBBLE = 2; GX4# IRq
public final static int SELECTION = 3; g0 \c
public final static int SHELL = 4; ahU\(=
public final static int QUICK = 5; !6'j W!
public final static int IMPROVED_QUICK = 6; OAEJ?ik
public final static int MERGE = 7; 9e@Sx{?r
public final static int IMPROVED_MERGE = 8; 9\0
public final static int HEAP = 9; 6(f[<V!r
MR:Co4(
public static void sort(int[] data) { {()8 Wr
sort(data, IMPROVED_QUICK); lGwX.cA!'
} LBk1Qw}-
private static String[] name={ f5IO<(:E^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5#!pwjt~7
}; wv #1s3
]/XNfb
private static Sort[] impl=new Sort[]{ ^D/:[
new InsertSort(), MW &iNioX
new BubbleSort(), HWi0m/J
new SelectionSort(), SuMK=^>%
new ShellSort(), I@08F
new QuickSort(), "i<i.6|
new ImprovedQuickSort(), .ZJt
new MergeSort(), nsqc^ K^
new ImprovedMergeSort(), aF1pq
new HeapSort() MW=2GhD=
}; \(R(S!xr_
DI'wZySS^
public static String toString(int algorithm){ NmthvKhH
return name[algorithm-1]; NJ9H=
} FZ DC?
nzmv>s&UW
public static void sort(int[] data, int algorithm) { w&8gA[y*u
impl[algorithm-1].sort(data); {n2mh%I
} ,9^wKS!7$
P PZxH}J.
public static interface Sort { L&+XFntR
public void sort(int[] data); {0WLY@7 2?
} L5Rj;qhi
j)?I]j/
public static void swap(int[] data, int i, int j) { Xhe25
int temp = data; MR=>DcR
data = data[j]; zHw[`"[
data[j] = temp; #(FG+Bk
} +e. bO5Y
} _fz-fG 1