[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; n[xkSF^)
} $BN15x0/:~
int i1=l; yT OyDm-
int i2=mid+1; XR# ;{p+b
for(int cur=l;cur<=r;cur++){ 6@;ha=[+
if(i1==mid+1) /%x7+Rl\-^
data[cur]=temp[i2++]; 1ZJ4*bn
else if(i2>r) ]rd/;kg.S
data[cur]=temp[i1++]; 4C_c\;d
else if(temp[i1] data[cur]=temp[i1++]; _cJ[ FP1
else 9~AWng
data[cur]=temp[i2++]; / YiQ\
} _68BP)nz>.
} 4Wel[]
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} khd5 Cf[
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改进后的归并排序: Lrz3
~m=EM;
package org.rut.util.algorithm.support; XaI;2fMGI
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import org.rut.util.algorithm.SortUtil; /4S;QEv
W+>wu%[L
/** BW[5o3 i
* @author treeroot =y ]Jl,_.
* @since 2006-2-2 mxTk+j=
* @version 1.0 cH`^D?#se
*/ qV1O-^&[f=
public class ImprovedMergeSort implements SortUtil.Sort { O_@2;iD^^
}amU[U,
private static final int THRESHOLD = 10; -mNQ;zI1
IY(h~O
/* Ayx^Wp*s
* (non-Javadoc) *3{J#Q6fk3
* QezSJ io
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @98;VWY\
*/ H>7dND2;
public void sort(int[] data) { ~2}Pl)
int[] temp=new int[data.length]; oVkq2
mergeSort(data,temp,0,data.length-1); uK*|2U6t
} =iz,S:[
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private void mergeSort(int[] data, int[] temp, int l, int r) { =Z0t :{
int i, j, k; % +Pl+`?E
int mid = (l + r) / 2; e29y7:)c=
if (l == r) .CV _\
return; ^tAO_~4
if ((mid - l) >= THRESHOLD) AY2:[ 5cm
mergeSort(data, temp, l, mid); Fxd{ Zk`
else zok D:c
insertSort(data, l, mid - l + 1); t\y-T$\\
if ((r - mid) > THRESHOLD) v#w_eqg
mergeSort(data, temp, mid + 1, r); gtU1'p"
else kl7A^0Qrz
insertSort(data, mid + 1, r - mid); M=!i>(yG
s3t!<9[m
for (i = l; i <= mid; i++) { 4I~i)EKy6
temp = data; M]_E
} D5]{2z}k
for (j = 1; j <= r - mid; j++) { iLq#\8t^
temp[r - j + 1] = data[j + mid]; `7Ug/R<
} crmUrF#
int a = temp[l]; hb^!LtF#Y
int b = temp[r]; xxX/y2\
for (i = l, j = r, k = l; k <= r; k++) { CMVS W6
if (a < b) { `| 9Ku
data[k] = temp[i++]; $C_M&O}
a = temp; PnWD}'0V
} else { 3;/?q
data[k] = temp[j--]; ,+L KJl
b = temp[j]; pG yRX_;
} +$pJ5+v
} X-Ycz 5?
} =I4.Gf"~f
\KM|f9-b
/** F-0UdV
* @param data k$[{n'\@
* @param l 'F_}xMU
* @param i }=@zj6AC
*/ T0|H9>M
private void insertSort(int[] data, int start, int len) { ,seFkG@1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c~tAvDX
} tHI*,
} "DckwtG:%
} 1bRL"{m^)-
} &4kM8Qh
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堆排序： 7kz-V.
K3ukYR
package org.rut.util.algorithm.support; $Ub}p[L
*BOBH;s
import org.rut.util.algorithm.SortUtil; +WF.wP?y
1D1b"o
/** N/{?7sG&
* @author treeroot ^ }#f()
* @since 2006-2-2 j[DIz@^
* @version 1.0 a-PGW2G
*/ h([0,:\
public class HeapSort implements SortUtil.Sort{ ]h@{6N'oNS
KOSyh<&
/* (non-Javadoc) 0|C[-ppr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?0J0Ij,
*/ Zoow*`b|$U
public void sort(int[] data) { Ak=UtDN[
MaxHeap h=new MaxHeap(); 5-'vB
h.init(data); Z=9dMND
for(int i=0;i h.remove(); .cR*P<3O
System.arraycopy(h.queue,1,data,0,data.length); 79tJV
} BX$hAQ(6Q
`Cj,HI_/*
private static class MaxHeap{ ryEvmWYu
t<lyg0f
void init(int[] data){ hEOJb @:R
this.queue=new int[data.length+1]; $FCw$+w
for(int i=0;i queue[++size]=data; ^Kw(&v
fixUp(size); /=M.-MU2
} v MWC(m
} "k>bUe|RG
~&~C#yjg1
private int size=0; FOp_[rR
d| \#?W&
private int[] queue; cdsQ3o
9p<:LZd~
public int get() { +{ab1))/
return queue[1]; z(UX't (q
} n4*'B*
-A@U0=o
public void remove() { [+DNM 2A
SortUtil.swap(queue,1,size--); rk|a'&
fixDown(1); CjZ6NAHc
} '#f?#(
file://fixdown >@Khm"/T
private void fixDown(int k) { JS2!)aqc
int j; {G.{ad
while ((j = k << 1) <= size) { 6QptKXu7
if (j < size %26amp;%26amp; queue[j] j++; EG1x
if (queue[k]>queue[j]) file://不用交换 s}!"a8hU`
break; *2:Yf7rvI+
SortUtil.swap(queue,j,k); mt.,4
k = j; 4`0;^K.
} +-k`x0v
} /O"0L/hc^
private void fixUp(int k) { gT7I9 (x!W
while (k > 1) { }q x(z^
int j = k >> 1; :+A;TV
if (queue[j]>queue[k]) 9jjL9f_3
break; zf")|9j
SortUtil.swap(queue,j,k); tQnJS2V"{u
k = j; ke</x+\F
} faJ8zX
} Z{16S=0
bl9E&B/
} G[B*TM6$
Faw. GU
} :\T_'Shq
/K&wr6
SortUtil： 2c*2\93>
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package org.rut.util.algorithm; x k#*=
v_.j/2U
import org.rut.util.algorithm.support.BubbleSort; [ 1D)$"
import org.rut.util.algorithm.support.HeapSort; A'(k Yc
import org.rut.util.algorithm.support.ImprovedMergeSort; #|D:f~"d3
import org.rut.util.algorithm.support.ImprovedQuickSort; ,XP@ pi
import org.rut.util.algorithm.support.InsertSort; !j'guT&9]
import org.rut.util.algorithm.support.MergeSort; m"1 ?
import org.rut.util.algorithm.support.QuickSort; p!V)55J*
import org.rut.util.algorithm.support.SelectionSort; @@xF#3
import org.rut.util.algorithm.support.ShellSort; `}n0=E
/3;=xZq
/** 'jwTGT5x
* @author treeroot 0MhxFoFO
* @since 2006-2-2 akY6D]M
* @version 1.0 -hm9sNox
*/ t"FRLC
public class SortUtil { }8X:?S %
public final static int INSERT = 1; +0)5H>h
public final static int BUBBLE = 2; {S# 5g2
public final static int SELECTION = 3; OQ 0b$qw
public final static int SHELL = 4; ob)D{4B'
public final static int QUICK = 5; 7{8)ykBU^
public final static int IMPROVED_QUICK = 6; 13]y)(
public final static int MERGE = 7; 34^Q5B~^J
public final static int IMPROVED_MERGE = 8; SwQOFE/Dv~
public final static int HEAP = 9; @V*au:
U@MOvW)
public static void sort(int[] data) { $Jt8d|UP
sort(data, IMPROVED_QUICK); cbY3mSfn*
} &s_}u%iC
private static String[] name={ 96k(XLR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~c'\IM
}; + >Fv*lux
VdYOm
private static Sort[] impl=new Sort[]{ :K5V/-[|V1
new InsertSort(), f2 VpeJ<p
new BubbleSort(), FxMMxY,*%
new SelectionSort(), S:DcfR=a
new ShellSort(), + 4++Z
new QuickSort(), d u_O}x
new ImprovedQuickSort(), 7Co3P@@
new MergeSort(), 6YB-}>?
new ImprovedMergeSort(), ~6=Wq64
new HeapSort() %,h!: Ec^c
}; ~p0e=u
XP3QBq
public static String toString(int algorithm){ "4k"U1
return name[algorithm-1]; oTZo[T@zRx
} hlt9x.e.A
lb=2*dFJ1
public static void sort(int[] data, int algorithm) { h6K!|-Gq.
impl[algorithm-1].sort(data); k{!iDZr&f,
} s$eK66H
D]3bwoFo&u
public static interface Sort { NO%|c|B|
public void sort(int[] data); nau~i1
} BNF++<s
s2kGU^]y
public static void swap(int[] data, int i, int j) { #p;4:IT
int temp = data; V/+H_=|
data = data[j]; Tm'lN5}&9
data[j] = temp; 1KNkl,E
} |Sy}d[VKsZ
} +<vqkc