[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; &V7{J9
} /9soUt
int i1=l; 8E\6RjM
int i2=mid+1; 2sXX0kq~V
for(int cur=l;cur<=r;cur++){ `n~bDG>
if(i1==mid+1) ngQ]
data[cur]=temp[i2++]; !4!Y~7sI"\
else if(i2>r) \Y}nehxG@
data[cur]=temp[i1++]; /g]m,Y{OI
else if(temp[i1] data[cur]=temp[i1++]; o_ SR
else qi-!iT(fe
data[cur]=temp[i2++]; h8tKYm
} wr;8o*~
} F /% 5 r{
twJ)h :!_y
} ?hwT{h
'-m )fWf
改进后的归并排序: GOhGSV#
bZ*J]1y(.
package org.rut.util.algorithm.support; L;k9}HWpP
06S-3bis
import org.rut.util.algorithm.SortUtil; N6_<[`
A!j6JY.w
/** I^fKZ^]8P
* @author treeroot QBfsdu<@^
* @since 2006-2-2 'Ijjk`d&c
* @version 1.0 !&OybjQ
*/ Z'L}x6
public class ImprovedMergeSort implements SortUtil.Sort { Y;WHjW(K
O(oGRK<xM
private static final int THRESHOLD = 10; ~Fd<d[b?
eZ~ZWb,%
/* rZv5>aEI
* (non-Javadoc) cA{zyq26
* 7ehs+GI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m;d#*}n\p
*/ 7'9~Kx&+
public void sort(int[] data) { Iz<}>J B
int[] temp=new int[data.length]; IT_Fs|$
mergeSort(data,temp,0,data.length-1); 5%n
} W{2(fb
5>'1[e45
private void mergeSort(int[] data, int[] temp, int l, int r) { -hIDL'5u-I
int i, j, k; i''[u
int mid = (l + r) / 2; L5tSS=
if (l == r) a,sU-w!X'
return; e8"?Qm7 J
if ((mid - l) >= THRESHOLD) %XieKL
mergeSort(data, temp, l, mid); 71ctjU`U2
else ?`%)3gx|
insertSort(data, l, mid - l + 1); vg5;F[e
if ((r - mid) > THRESHOLD) [EETx-
mergeSort(data, temp, mid + 1, r); A12#v,
else Pe_iA_
insertSort(data, mid + 1, r - mid); A<zSh}eh6
#{8n<sE
for (i = l; i <= mid; i++) { EJrn4QOs
temp = data; JtrLTo
} ,U#$Qb 12
for (j = 1; j <= r - mid; j++) { w1+xlM,,9
temp[r - j + 1] = data[j + mid]; ]"< `^
} \Q+<G-Kb.
int a = temp[l]; Gmi$Nl!~
int b = temp[r]; oX9rpTi
for (i = l, j = r, k = l; k <= r; k++) { <ZV !fn
if (a < b) { :3# t;
data[k] = temp[i++]; ;-1yG@KG
a = temp; i|5K4Puu
} else { ^Fr82rJs
data[k] = temp[j--]; W=$d|*$
b = temp[j]; tNI~<#+lg
} p Rn vd|
} pZ,P_?
} ` qqUuFMM
C=6Vd
/** [p+6HF
* @param data e!67Na0X(
* @param l 9 L{JU
* @param i NyTv~8A`)
*/ )o<rU[oD]C
private void insertSort(int[] data, int start, int len) { :N<ZO`l?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7Xu.z9y
} )r#^{{6[v
} 4Y[uqn[
} SoY=
} _T 5ZL
bt/u^E
堆排序： }-:s9Lt
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package org.rut.util.algorithm.support; BiQ7r=Dd.
MXbt`]`_
import org.rut.util.algorithm.SortUtil; 4A_}:nU
%z&=A%'a
/** ]R8}cbtU
* @author treeroot ROr..-[u
* @since 2006-2-2 Pd@y+|
* @version 1.0 *t'qn
*/ TM8WaH
public class HeapSort implements SortUtil.Sort{ t7#C&B
.r/6BDE"
/* (non-Javadoc) zice0({iJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fD#VI
*/ piE9qXn
public void sort(int[] data) { I|?zSFa
MaxHeap h=new MaxHeap(); X#$mBRK7
h.init(data); &>I4-D[
for(int i=0;i h.remove(); 777N0,o(
System.arraycopy(h.queue,1,data,0,data.length); /XG4O
} iD)R*vnAi
^@'LF T)
private static class MaxHeap{ er Cl@sq
!tkP!%w
void init(int[] data){ 2G'Au}q0n
this.queue=new int[data.length+1]; wD-(3ZVd4
for(int i=0;i queue[++size]=data; aO9a G*9T
fixUp(size); @3/.W+
} *7'}"@@
} `k}
85P7I=`*d
private int size=0; G'/36M@
!A(*?0`
private int[] queue; oe$Y=`
$2=-Q/lM
public int get() { $0C1';=^}
return queue[1]; p.9VyM
} beyC't
Farcd!}
public void remove() { _VFxzM9f
SortUtil.swap(queue,1,size--); -z]v"gF?Px
fixDown(1); o7N3:)
} J;pn5k~3
file://fixdown K4Mv\!Q<8
private void fixDown(int k) { ~l~ai>/
int j; L3^WI( 8m
while ((j = k << 1) <= size) { DW^E46k)A
if (j < size %26amp;%26amp; queue[j] j++; SrPZ^NF
if (queue[k]>queue[j]) file://不用交换 -MrEJ
break; 0#~e KFy
SortUtil.swap(queue,j,k); H]5%"(h
k = j; >}`q4U6$
} 9S ~!!7oj
} 1=x4m=wV
private void fixUp(int k) { iq>PN:mr
while (k > 1) { ?:(BkY,K5
int j = k >> 1; PSX-b)wb
if (queue[j]>queue[k]) eJ+V!K'H2
break; 3+gp_7L
SortUtil.swap(queue,j,k); X8uVet]D~
k = j; x4jn45]x@
} #F\}PCBe'
} 9K*yds
okx~F9
} &CCp@" +
(B@:0}>
} H tIl;E
Fv \yhR
SortUtil： w)o^?9T
d(RSn|[0
package org.rut.util.algorithm; u|l]8T9L
kYwk'\s
import org.rut.util.algorithm.support.BubbleSort; !ydJ{\;
import org.rut.util.algorithm.support.HeapSort; l$$N~FN
import org.rut.util.algorithm.support.ImprovedMergeSort; tSK{Abw1B
import org.rut.util.algorithm.support.ImprovedQuickSort; .!T]sX_P
import org.rut.util.algorithm.support.InsertSort; R9X*R3nB
import org.rut.util.algorithm.support.MergeSort; ,&S:(b[D
import org.rut.util.algorithm.support.QuickSort; &D,gKT~
import org.rut.util.algorithm.support.SelectionSort; (,~gY=E+
import org.rut.util.algorithm.support.ShellSort; 9s\;,!b
N>?R,XM V
/** lYkm1
* @author treeroot ;W6P$@'zs
* @since 2006-2-2 ?[>+'6
* @version 1.0 wykk</eQ.i
*/ -=aI!7*"$
public class SortUtil { *k:Sg*neVq
public final static int INSERT = 1; RX.n7Tb
public final static int BUBBLE = 2; Xk[;MZ[
public final static int SELECTION = 3; 1<RB}M
public final static int SHELL = 4; n5i#GvO^
public final static int QUICK = 5; MsMNP[-l
public final static int IMPROVED_QUICK = 6; ^v.~FFK
public final static int MERGE = 7; X(F2 5
public final static int IMPROVED_MERGE = 8; W]p)}#FR
public final static int HEAP = 9; 0\f3La
r'7>J:cy=
public static void sort(int[] data) { #Jt9U1WbF
sort(data, IMPROVED_QUICK); $ BV4i$
} :hYV\8$
private static String[] name={ hO3>Gl5<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z_vFf0
}; %jKbRiz1u
SXn\k;F<
private static Sort[] impl=new Sort[]{ @l~zn%!X
new InsertSort(), |) {)w`
new BubbleSort(), s u]x
new SelectionSort(), J1kG'cH05
new ShellSort(), )8Defuxk
new QuickSort(), +~lZ]a7k
new ImprovedQuickSort(), i9?$BZQ[R
new MergeSort(), (rV#EA+6[`
new ImprovedMergeSort(), aW-'Jg=@H^
new HeapSort() Bi?+e~R
}; Id3i qAL
Op^r}7
public static String toString(int algorithm){ $OK}jSH*v)
return name[algorithm-1]; %lsk>V
} a=3?hVpB
/*DC`,q
public static void sort(int[] data, int algorithm) { rJ)O(
impl[algorithm-1].sort(data); AZ~=]1
} =H&@9=D*
?k)(~Y&@p
public static interface Sort { SB R=
public void sort(int[] data); L1;IXCc=
} 9$F '*{8
g7G=ga
public static void swap(int[] data, int i, int j) { GmoY~}cg~
int temp = data; >(Mu9ie*`
data = data[j]; bgs2~50
data[j] = temp; Ym~*5|
} KF&1Y>t=
} .iFd