[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; R+Hu?Dv&F
} |p&EP2?T
int i1=l; LJ/He[r|[
int i2=mid+1; S3ooG14Ls
for(int cur=l;cur<=r;cur++){ eV|N@
if(i1==mid+1) ]EX6Y
data[cur]=temp[i2++]; DOKe.k
else if(i2>r) {x_.QWe5
data[cur]=temp[i1++]; 0N$7(.
else if(temp[i1] data[cur]=temp[i1++]; e=OHO,74z"
else $lJcC |*
data[cur]=temp[i2++]; /=m AVA
} eyDV911
} C6;2Dd]"N
ZyUcL_
} !HDb{f
$:F+Nf 8
改进后的归并排序: OX]$Xdb2:
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package org.rut.util.algorithm.support; FtIcA"^N
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import org.rut.util.algorithm.SortUtil; iAu/t
[! $NTt_
/** Y7}Tuy dC
* @author treeroot Xkhd"Axi
* @since 2006-2-2 a.Z@Z!*
* @version 1.0 .P)lQk\
*/ ~DInd-<5
public class ImprovedMergeSort implements SortUtil.Sort { o:AfEoH"~
8~C_ng-wn
private static final int THRESHOLD = 10; VO|ECB2e
wc;n= %
/* qg oB}n%
* (non-Javadoc) z3+@[I$
* <u!cdYo@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ds">eNq
*/ kP ]Up&'
public void sort(int[] data) { lA5Dag'
int[] temp=new int[data.length]; n^4R]9U
mergeSort(data,temp,0,data.length-1); Ik0g(-d
} (?|M'gZ
f,cd=vGj
private void mergeSort(int[] data, int[] temp, int l, int r) { P }sr
int i, j, k; &W@2n&U.q
int mid = (l + r) / 2; ^z{szy?Fg
if (l == r) {|?^@
return; '[{<aEo
if ((mid - l) >= THRESHOLD) UucI>E3?P{
mergeSort(data, temp, l, mid); 5g7@Dj,.
else e?]5q ez
insertSort(data, l, mid - l + 1); W "'6M=*
if ((r - mid) > THRESHOLD) .HS6DOQ
mergeSort(data, temp, mid + 1, r); oFWb.t9<
else 1|MRXK
insertSort(data, mid + 1, r - mid); ]y0Y(
h3CA,$HJ
for (i = l; i <= mid; i++) { SndR:{
temp = data; ODxZO3
} WTfjn|a
for (j = 1; j <= r - mid; j++) { m\`>N_4*9
temp[r - j + 1] = data[j + mid]; f jx`|MJ
} nqyD>>
int a = temp[l]; ? }M81
int b = temp[r]; qiNVaV\wr|
for (i = l, j = r, k = l; k <= r; k++) { 7Z6=e6/\
if (a < b) { ,|]JaZq
data[k] = temp[i++]; ~#pATPW@(
a = temp; FJ;I1~??
} else { YaC%69C'
data[k] = temp[j--]; $H)^o!
b = temp[j]; 4@PA+(kvS
} Xqf,_I=V
} N[e,){v
} yajdRU
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/** BO[:=x`
* @param data VzP az\e
* @param l 3kn-tM
* @param i G4)~p!TSQ
*/ ;g|Vt}a&4
private void insertSort(int[] data, int start, int len) { za_b jE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;+9OzF ;
} sK}AS;:
} 'C[tPP
} 4ijtx)SA
} 1$>+rW{a
'UX.Q7W
堆排序： }Pcm'o_wT
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package org.rut.util.algorithm.support; 9bM\ (s/
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import org.rut.util.algorithm.SortUtil; j6m;03<|
K zWo}tT
/** 'R7 \
* @author treeroot V@ >(xe7
* @since 2006-2-2 n#(pT3&
* @version 1.0 V(7,N(
*/ z#*.9/y\^R
public class HeapSort implements SortUtil.Sort{ .xRdKt!p
y\?ey'o
/* (non-Javadoc) 2cMCZuO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r_T)|||v
*/ R/vHq36d
public void sort(int[] data) { EW `hL~{
MaxHeap h=new MaxHeap(); 6Tl6A>%s
h.init(data); GKBoSSnV&
for(int i=0;i h.remove(); A8)4nOXM
System.arraycopy(h.queue,1,data,0,data.length); XiW1X6
} M8/a laoT
76nH)^%l<
private static class MaxHeap{ ~YYnn7)
Su#0F0
void init(int[] data){ !}&|a~U@`k
this.queue=new int[data.length+1]; %* "+kwZ
for(int i=0;i queue[++size]=data; >i/jqT/
fixUp(size); Tq1\
} kaBjA*
} S_ATsG*(
4 PK}lc
private int size=0; n!jmxl$
(S[z
private int[] queue; d][ Wm
oZ'a}kF
public int get() { N^L@MR-
return queue[1]; (80m'.X
} s0SzO,Vi
4#$#x=:
public void remove() { rAenxZ,tF
SortUtil.swap(queue,1,size--); mWp>E`l
fixDown(1); zggnDkC5
} J@3,
file://fixdown P'W} ]mCD
private void fixDown(int k) { Ln+l'&_nb
int j; wI.aV>
while ((j = k << 1) <= size) { 1dH|/9
if (j < size %26amp;%26amp; queue[j] j++; ^? fOccfQ{
if (queue[k]>queue[j]) file://不用交换 uFkl^2
break; (@?mm
SortUtil.swap(queue,j,k); VBhUh~:Om
k = j; oTw!#Re)
} F? #3
} DHO]RRGV
private void fixUp(int k) { mQ[$U
while (k > 1) { <FT7QO$I
int j = k >> 1; yJA~4
if (queue[j]>queue[k]) +}:Z9AAMy
break; :/5m D
SortUtil.swap(queue,j,k); }`tSRB7
k = j; ;+Jx,{)
} 0Hnj<|HL
} 8D*7{Q
#AD_EN9
} T+Oqd\05.+
d ^bSV4
} ho\1[xS
fM=o?w6v
SortUtil： MxE]EJZ
`|t,Uc|7!
package org.rut.util.algorithm; k&Pt\- 9on
S=@+qcI
import org.rut.util.algorithm.support.BubbleSort; }k^uup*{
import org.rut.util.algorithm.support.HeapSort; p Cz6[*kC
import org.rut.util.algorithm.support.ImprovedMergeSort; ]J7qsMw
import org.rut.util.algorithm.support.ImprovedQuickSort; =KE7NXu]-
import org.rut.util.algorithm.support.InsertSort; SuE~Wb5&
import org.rut.util.algorithm.support.MergeSort; "zEl2Xn28_
import org.rut.util.algorithm.support.QuickSort; 4Gu'WbJ
import org.rut.util.algorithm.support.SelectionSort; &[E\2 E
import org.rut.util.algorithm.support.ShellSort; u64#,mC[*
bC{4a_B
/** WtM%(8Y[]
* @author treeroot iq&3S0
* @since 2006-2-2 ipSMmpB
* @version 1.0 +H-=`+,
*/ Eb3ZM#
public class SortUtil { o_:v?Y>0
public final static int INSERT = 1; EGu%;[
public final static int BUBBLE = 2; BA;r%?MRL
public final static int SELECTION = 3; M8},RR@{
public final static int SHELL = 4; )GP;KUVae
public final static int QUICK = 5; \/ bd
public final static int IMPROVED_QUICK = 6; J Enjc/
public final static int MERGE = 7; %cF`x_h[j
public final static int IMPROVED_MERGE = 8; .D*Qu}
public final static int HEAP = 9; -^p{J TB+
qt8Y3:=8l
public static void sort(int[] data) { *!5CL'
sort(data, IMPROVED_QUICK); MAa9JA8kw)
} @6 he!wW
private static String[] name={ DB vM.'b$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q):#6|u+
}; |x}TpM;ni
1XGg0SC
private static Sort[] impl=new Sort[]{ Cfi{%,em
new InsertSort(), Jh"[ug
new BubbleSort(), oo'9ZE/%
new SelectionSort(), = 0 ~4k#
new ShellSort(), oW^b,{~V
new QuickSort(), -#\T
new ImprovedQuickSort(), 1/dL-"*0
new MergeSort(), ^y5A\nz&
new ImprovedMergeSort(), [$y(>]~.
new HeapSort() L%/RD2LD
}; L8 P0bNi
LuS@Kf8N+
public static String toString(int algorithm){ bZowc {!\
return name[algorithm-1]; *xnZTj:
} SmXoNiM"y
F`D$bE;|
public static void sort(int[] data, int algorithm) { h:Pfiw]
impl[algorithm-1].sort(data); N/a4Gl(
} |Ajd$+3
DB}Uzw|
public static interface Sort { 6-U_TV
public void sort(int[] data); 9q;O`&
} !BQt+4G7
$QJ3~mG2
public static void swap(int[] data, int i, int j) { 2?,Jn&i5
int temp = data; m6Dm1'+
data = data[j]; TmgC {_
data[j] = temp; r)<A YX]J
} OUv)`K
} 2Kxb(q"