[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; J-, H6u
} MdVCD^B
int i1=l; 84p[N8
int i2=mid+1; !bZhj3.
for(int cur=l;cur<=r;cur++){ piYws<Q
if(i1==mid+1) Bbl)3$`,
data[cur]=temp[i2++]; O^X[9vrW
else if(i2>r) m~Y'$3w
data[cur]=temp[i1++]; vZ[$H
else if(temp[i1] data[cur]=temp[i1++]; ZVdsxo<
else .7pGx*WH^Y
data[cur]=temp[i2++]; Q{qj
} iHE0N6%q
} P~Te+ -jX}
*xX(!t'
} [+;FV!M6
[GR]!\!%~
改进后的归并排序: ]cF1c90%
hl6,#2$
package org.rut.util.algorithm.support; Y7*(_P3/
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import org.rut.util.algorithm.SortUtil; x{NNx:T1
?418*tXd
/** ^MW\t4pZ
* @author treeroot ,bZ"8Z"lss
* @since 2006-2-2 +CnyK(V
* @version 1.0 _HWHQF7
*/ ^8?j~&u$F
public class ImprovedMergeSort implements SortUtil.Sort { ]]p19[4s
5,HCeN
private static final int THRESHOLD = 10; gdoJ4b
g.[+yzuE6
/* r#_7]_3
* (non-Javadoc) *[d~Nk%Y$
* H$~M`Y9I~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |8&-66pX
*/ !X5o7b)
public void sort(int[] data) { \LIy:$`8
int[] temp=new int[data.length]; ~In{lQ[QX
mergeSort(data,temp,0,data.length-1); ; g Z%U
} fKL'/?LD]
tA`mD>[
private void mergeSort(int[] data, int[] temp, int l, int r) { uY&=eQ_Cb
int i, j, k; Cz'xGW{
int mid = (l + r) / 2; ]j& FbP)3
if (l == r) +M44XhT
return; ftYR,!&
if ((mid - l) >= THRESHOLD) b@=zrhQ
mergeSort(data, temp, l, mid); RH!SW2o<
else 5Y(r\Dd
insertSort(data, l, mid - l + 1); 'RDWU7c9]
if ((r - mid) > THRESHOLD) 'R^iKNPs
mergeSort(data, temp, mid + 1, r); ]s*5[=uc2
else 3C277nx
insertSort(data, mid + 1, r - mid); KqN!?anPr
=ud`6{R
for (i = l; i <= mid; i++) { E4Y"X
temp = data; -'80>[}q/
} 7<h.KZPc
for (j = 1; j <= r - mid; j++) { ixOEdQ
temp[r - j + 1] = data[j + mid]; Y3-]+y%l
} q{a#HnZo"
int a = temp[l]; e{,!|LhpQ
int b = temp[r]; yJnPD/i
for (i = l, j = r, k = l; k <= r; k++) { ]UK`?J=t2g
if (a < b) { :&Qb>PH[
data[k] = temp[i++]; 'n~fR]h}
a = temp; sS C?io
} else { |WB"=PE
data[k] = temp[j--]; WI,40&<
b = temp[j]; 0(wf{5
} uVN.=
} >HE,'
} 4Z*|Dsw
riID,aut
/** )yHJ[
* @param data e&d3SQ%
* @param l E::L?#V
* @param i Oc7 >S.1
*/ 3"5.eZSOW
private void insertSort(int[] data, int start, int len) { a*V9_Px$&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D^|jZOJ
} p?Z(rCp
} 3f_i1|>)'
} / >%L[RJ4
} O4T'o.
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堆排序： S2ark,sp6
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package org.rut.util.algorithm.support; uii7b7[w
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import org.rut.util.algorithm.SortUtil; *yrnK3
y $:yz;
/** ?RDO] I>
* @author treeroot Ru:n~77{
* @since 2006-2-2 KL "Y!PN:
* @version 1.0 1:_=g#WH
*/ USprsaj
public class HeapSort implements SortUtil.Sort{ FS8S68
fVYiwE=F
/* (non-Javadoc) LaDY`u0G%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9J?W '8s5
*/ PCtkjd
public void sort(int[] data) { 3:UA<&=s
MaxHeap h=new MaxHeap(); RYt6=R+f
h.init(data); J=):+F=
for(int i=0;i h.remove(); 5lO^;.cS,
System.arraycopy(h.queue,1,data,0,data.length); %8 qSv%_
} t')h{2&&!2
`Z:3`7c
private static class MaxHeap{ ;J'OakeVO
c)03Ms4 D
void init(int[] data){ _D-5}a"
this.queue=new int[data.length+1]; 3g;T?E
for(int i=0;i queue[++size]=data; d]MGN^%o
fixUp(size); 90p3V\LO
} i(0hvV>'
} )6G"*
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private int size=0; m*gj|1k
E[UO5X
private int[] queue; u^l*5F%DK
7gm:ZS
public int get() { A';n6ne%i
return queue[1]; ' X}7]y
} @LcT-3u
qp\BV#E
public void remove() { [yC"el6PM
SortUtil.swap(queue,1,size--); /tP7uVL R
fixDown(1); qtzFg#
} qL3@PSN?|
file://fixdown Wk}D]o0^@
private void fixDown(int k) { 66 N)
int j; b~j~
while ((j = k << 1) <= size) { 847 R
if (j < size %26amp;%26amp; queue[j] j++; %[XY67A3I
if (queue[k]>queue[j]) file://不用交换 ?I\v0H*
break; .liyC~YW
SortUtil.swap(queue,j,k); *="m3:c'J
k = j; 9\>sDSCx
} =5Wp&SM6
} |YRY!V_w
private void fixUp(int k) { 2A>C+Y[7\
while (k > 1) { y^G>{?Tha
int j = k >> 1; {V0>iN:~S
if (queue[j]>queue[k]) 7 5|pp
break; *0~M
SortUtil.swap(queue,j,k); n$YE !D'
k = j; 2m\m/O
} F@1d%c
} "<x&pQZ%
q3)wr%!k5D
} ]H+{eJB7O
jN6b*-2
} y AOg\+
"5}%"-#
SortUtil： +2Ql~w@$^l
XVF^,Yf
package org.rut.util.algorithm; q & b5g !
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import org.rut.util.algorithm.support.BubbleSort; T(V8;!
import org.rut.util.algorithm.support.HeapSort; s^cc@C
import org.rut.util.algorithm.support.ImprovedMergeSort; b_=8!Q.:
import org.rut.util.algorithm.support.ImprovedQuickSort; 2e.N"eLNt
import org.rut.util.algorithm.support.InsertSort; IA2GUnUhu
import org.rut.util.algorithm.support.MergeSort; b=1%pX_
import org.rut.util.algorithm.support.QuickSort; z,x"a
import org.rut.util.algorithm.support.SelectionSort; +]c}rWm
import org.rut.util.algorithm.support.ShellSort; V&[eSVY?
U(~U!O}
/** 4V$fGjJ3
* @author treeroot sAYV)w3u"
* @since 2006-2-2 g4wZvra6%)
* @version 1.0 VgMP^&/gZ
*/ |1l&@#j!2
public class SortUtil { %`+'v_iu
public final static int INSERT = 1; i3PKqlp.
public final static int BUBBLE = 2; 2tf6GX:
public final static int SELECTION = 3; xnbsg!`;7W
public final static int SHELL = 4; N_G4_12(
public final static int QUICK = 5; e:OyjG5_
public final static int IMPROVED_QUICK = 6; 6/6Rah!
public final static int MERGE = 7; Hbk&6kS
public final static int IMPROVED_MERGE = 8; FJT1i@N
public final static int HEAP = 9; _]=9#Fg7{
CZ3].DA|z
public static void sort(int[] data) { 9!}q{2j
sort(data, IMPROVED_QUICK); G52Z)^
} ErDL^M-`
private static String[] name={ d0 -~|`5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HH8;J66I&
}; etyCrQ ?U
c@(1:,R
private static Sort[] impl=new Sort[]{ %hINpZMr
new InsertSort(), M4?8xuC
new BubbleSort(), gvyT-XI
new SelectionSort(), >'`Sf ?+|
new ShellSort(), *Hs*,}MS
new QuickSort(), eg3L:rk_
new ImprovedQuickSort(), 2+'|kt2
new MergeSort(), ,J(lJ,c
new ImprovedMergeSort(), S0LszW)e
new HeapSort() RtC'v";6
}; [M:S`{SbY
:c7CiP
public static String toString(int algorithm){ ?2ItB`<(
return name[algorithm-1]; #s2B%X
} y94kX:q
eOnTW4
public static void sort(int[] data, int algorithm) { p<5!02yQ\
impl[algorithm-1].sort(data); } 0M{A+
} 4x,hj
%l7fR}
public static interface Sort { PLdn#S}.
public void sort(int[] data); RUGv8"j
} aFY u}kl
KG8W8&q
public static void swap(int[] data, int i, int j) { fg&eoI'f
int temp = data; \.<KA
data = data[j]; PAZ$_eSK6
data[j] = temp; V=}1[^
} D.*>;5:0'
} eko]H!Ov(