[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; c3+vtP&
} j.sf FS
int i1=l; !xSGZD=AD
int i2=mid+1; tFCeE=4%
for(int cur=l;cur<=r;cur++){ MG|NH0k
if(i1==mid+1) Bb6_['y
data[cur]=temp[i2++]; 2_p/1Rs
else if(i2>r) "#%T*c{Tf0
data[cur]=temp[i1++]; D KOdqTW
else if(temp[i1] data[cur]=temp[i1++]; }N NyUwFa
else tQ"PCm
data[cur]=temp[i2++]; F/h)azcn
} Z q)A"'Y
} n$>H}#q
rQF%;
} :HC{6W`$
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改进后的归并排序: ` $}[np|
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package org.rut.util.algorithm.support; b1+Nm
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import org.rut.util.algorithm.SortUtil; {v(3[7
%rkUy?=vu
/** ouujd~b+
* @author treeroot H3JWf MlW
* @since 2006-2-2 RAvV[QkT
* @version 1.0 e2>gQ p/
*/ 6xwC1V?:0t
public class ImprovedMergeSort implements SortUtil.Sort { }0I! n@
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private static final int THRESHOLD = 10; &Ef'5
\|kU{d0
/* 0>vm&W<?)
* (non-Javadoc) ke0Vy(3t{h
* {az8*MR=X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~dv C$
*/ IaW8
public void sort(int[] data) { ?AR6+`0
int[] temp=new int[data.length]; 4&tY5m>
mergeSort(data,temp,0,data.length-1); )<+Z,6
} X@B+{IFC
vg<_U&N=-r
private void mergeSort(int[] data, int[] temp, int l, int r) { l ^{]pD
int i, j, k; u >x2
int mid = (l + r) / 2; R]dc(D
if (l == r) U7O2.y+
return; sf%=q$z
if ((mid - l) >= THRESHOLD) LGK}oL'
mergeSort(data, temp, l, mid); xZ .:H&0G
else zk?lNs
insertSort(data, l, mid - l + 1); sD M!Uv2n
if ((r - mid) > THRESHOLD) ;kdJxxUox
mergeSort(data, temp, mid + 1, r); "p<f#s}
else +K&ze:-Z
insertSort(data, mid + 1, r - mid); w\a\I
K}6}Opr,Tt
for (i = l; i <= mid; i++) { _uDtRoI8
temp = data; x\)-4w<P
} kj>XKZL10
for (j = 1; j <= r - mid; j++) { ?P}7AF A(W
temp[r - j + 1] = data[j + mid]; Q16RDQ*
} lgU7jn
int a = temp[l]; H}A67J9x
int b = temp[r]; Oa{M9d,l
for (i = l, j = r, k = l; k <= r; k++) { ]^dXB0
if (a < b) { T2k5\r8
data[k] = temp[i++]; bBGLf)fsTG
a = temp; 4!D!.t~r
} else { a&j H9
data[k] = temp[j--]; g8^$,
b = temp[j]; qz?9:"~$C
} LqW~QEU(
} \SyfEcSf2v
} nlh%O@,
oA`Ncu5
/** pj'Yv
* @param data ="MG>4j3.F
* @param l zvE]4}VL?
* @param i n{|~x":9V
*/ "@.hz@>
private void insertSort(int[] data, int start, int len) { Yf|+p65g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); iX}EJD{f
} Nq-qks.&
} >[NNu Y~
} ZM0vB% M|
} "H6DiPh.E
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堆排序： L ej3? k
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package org.rut.util.algorithm.support; %<P&"[F]v@
^dRB(E}|)
import org.rut.util.algorithm.SortUtil; ~r+;i,,X
kz]qk15w
/** _HGbR/
* @author treeroot A=>%KQc?
* @since 2006-2-2 pf[bOjtR
* @version 1.0 aR+vY1d"
*/ uPt({H
public class HeapSort implements SortUtil.Sort{ 8KN0z<
^C_ ;uz
/* (non-Javadoc) V4iN2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0jG8Gmh!
*/ Z+JPxe#7
public void sort(int[] data) { "RiY#=}sm
MaxHeap h=new MaxHeap(); @}qMI
h.init(data); IOomBy:
for(int i=0;i h.remove(); wm_xH_{F
System.arraycopy(h.queue,1,data,0,data.length); Dhv ^}m@
} s@V4ny9x
~Cm_=[
private static class MaxHeap{ `|+!H.3
Zg_ fec~6q
void init(int[] data){ k,OP*M
this.queue=new int[data.length+1]; V& _
for(int i=0;i queue[++size]=data; &i$p5
fixUp(size); LS <\%A}
} m?0caLw<
} OjFB_ N
ch!/k
private int size=0; "`s{fy~mV
Onz@A"
private int[] queue; t,Ss3
/'O? 8X<
public int get() { nF`_3U8e
return queue[1]; 16Cd0[h?
} c<fl6o)
\AQ*T`Dq
public void remove() { B _k+Oa2!
SortUtil.swap(queue,1,size--); ,=jwQG4wq
fixDown(1); bdbTK8-
} t}w<xe
file://fixdown ~U}0=lRVS
private void fixDown(int k) { a'r8J~:jy
int j; usc"m huQ
while ((j = k << 1) <= size) { n|q$=jE
if (j < size %26amp;%26amp; queue[j] j++; clyZD`*
if (queue[k]>queue[j]) file://不用交换 v)1@Ew=Y%
break; ;auT!a~a#
SortUtil.swap(queue,j,k); 6 b-'Hui+
k = j; wkc)2z
} Y#7sDd!N|
} =jz [}5
private void fixUp(int k) { )jm!bR`
while (k > 1) { N.(wR
int j = k >> 1; -Ph"#R&
if (queue[j]>queue[k]) bS7%%8C
break; @?e+;Sx
SortUtil.swap(queue,j,k); k}18 ~cWM
k = j; ld
} Bre:_>*
} C( wZjO?N
Bc&Y[u-n
} J@$KF GUs
= Zi'L48
} 1#}}:
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SortUtil： [SJ3FZ<
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package org.rut.util.algorithm; o&-D[|E|
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import org.rut.util.algorithm.support.BubbleSort; r|av|7R
import org.rut.util.algorithm.support.HeapSort; zPm|$d
import org.rut.util.algorithm.support.ImprovedMergeSort; `]F}O \H
import org.rut.util.algorithm.support.ImprovedQuickSort; CT{mzC8
import org.rut.util.algorithm.support.InsertSort; gUGMoXSTI|
import org.rut.util.algorithm.support.MergeSort; f9$8$O
import org.rut.util.algorithm.support.QuickSort; d RIuA)0s
import org.rut.util.algorithm.support.SelectionSort; <~z@GMQCf
import org.rut.util.algorithm.support.ShellSort; 40=*Ul U-
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/** 7/e25LS!`U
* @author treeroot $&Lw 2 c0
* @since 2006-2-2 <]Btx;}
* @version 1.0 B}fd#dr
*/ Fzmc#?
public class SortUtil { .VXadgM
public final static int INSERT = 1; pddumbp
public final static int BUBBLE = 2; ,4mb05w;d
public final static int SELECTION = 3; #kQ1,P6,(
public final static int SHELL = 4; >lkjoEVQ
public final static int QUICK = 5; {c}n."`
public final static int IMPROVED_QUICK = 6; H"NBjVRU%
public final static int MERGE = 7; JCjV,
public final static int IMPROVED_MERGE = 8; cB0"vbdO
public final static int HEAP = 9; -J":'xCP!
Lrjp
public static void sort(int[] data) { z"\<GmvB
sort(data, IMPROVED_QUICK); _J&IL!S2
} >c)-o}bd^
private static String[] name={ ^UmhSxQ##
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NjFlV(XT}
}; ]kdU]}z
+OaBA>Jh9
private static Sort[] impl=new Sort[]{ gY {/)"
new InsertSort(), U_sM==~
new BubbleSort(), }Jo}K)>!
new SelectionSort(), EG!Nsb^,
new ShellSort(), TUN6`/"
new QuickSort(), Yij_'0vZ
new ImprovedQuickSort(), 3w&Z:<
new MergeSort(), 6GMwB@ b
new ImprovedMergeSort(), s:xt4<
new HeapSort() nTv^][
}; &8HJ4Vj2
+8}8b_bgH
public static String toString(int algorithm){ }xJ!0<Bs
return name[algorithm-1]; @{@DGc
} ~Dbu;cqR@
RPw1i*
public static void sort(int[] data, int algorithm) { ("s!t?!&YS
impl[algorithm-1].sort(data); h'B0rVQia>
} Zx&=K"
$C t(M)
public static interface Sort { efK WR
public void sort(int[] data); C]a iu
} 09 vm5|
R^6]v`j;
public static void swap(int[] data, int i, int j) { \SooIEl@
int temp = data; PG{"GiZz=
data = data[j]; )uO 3v
data[j] = temp; E?h'OR@_ L
} 5Z>+NKQ
} ZMEYF!jN