[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; 0R*!o\y
} 1k "*@Z<
int i1=l; <4Ujk8Zj
int i2=mid+1; |ukEnjI`u
for(int cur=l;cur<=r;cur++){ )8P<ZtEU
if(i1==mid+1) ;.m"y-
data[cur]=temp[i2++]; 5)EnOT"'
else if(i2>r) JkpA \<
data[cur]=temp[i1++]; K _y;<a]
else if(temp[i1] data[cur]=temp[i1++]; [j:%O|h
else =SLJkw&w6
data[cur]=temp[i2++]; %Wu3$b
} IWKQU/l!
} 9I.="b=J)
Z=wLNmH
} 6B|IbQ^
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改进后的归并排序: "y5c)l(Rg
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package org.rut.util.algorithm.support; x+^iEj`gk
/SP^fB*y
import org.rut.util.algorithm.SortUtil; dZ;csc@xv
5a4;d+
/** et)A$'Q
* @author treeroot E[e ''
* @since 2006-2-2 8Gs{Zfp!D
* @version 1.0 t[0gN:s
*/ ?l bK;Kv
public class ImprovedMergeSort implements SortUtil.Sort { Rz%+E0
|8V+(Vzl
private static final int THRESHOLD = 10; \W#M]Q
MheP@ [w|@
/* s{hJ"lv:
* (non-Javadoc) Z wIsEJz
* 6XB9]it6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "EHwv2Hm>
*/ oXb}6YC
public void sort(int[] data) { {6v+ Dz>
int[] temp=new int[data.length]; !a4pKN`qLY
mergeSort(data,temp,0,data.length-1); S,qsCnz
} _[IN9ZC2G
WEWNFTI
private void mergeSort(int[] data, int[] temp, int l, int r) { )I`B+c:
int i, j, k; M(SH3~
int mid = (l + r) / 2; @K2q*d
if (l == r) #@lLx?U
return; D1x~d<j
if ((mid - l) >= THRESHOLD) \$GlB+ iCx
mergeSort(data, temp, l, mid); N(&,+KJ)
else }!5"EL(L80
insertSort(data, l, mid - l + 1); o'r?^ *W
if ((r - mid) > THRESHOLD) -*+7-9A I
mergeSort(data, temp, mid + 1, r); mWCY%o@
else Q+Jzab
insertSort(data, mid + 1, r - mid); 8 w^i
\*a7DuVw
for (i = l; i <= mid; i++) { @k~Xem%<
temp = data; :\gdQG
} ;h3c+7u1
for (j = 1; j <= r - mid; j++) { &P,8)YA
temp[r - j + 1] = data[j + mid]; wVV'9pw}
} ANi}q9SC
int a = temp[l]; mI9~\k&9
int b = temp[r]; M>8#is(pV
for (i = l, j = r, k = l; k <= r; k++) { #t po@pJsE
if (a < b) { VbJGyjx
data[k] = temp[i++]; I}$Y[Jve
a = temp; n$B=Vt,
} else { c?j/H$
data[k] = temp[j--]; ~B1)!5Z
b = temp[j]; (4x`/
} sDw&U?gUv
} /oE@F178
} \_CC6J0k
[y64%|m
/** d#Ql>PrY
* @param data l>H#\MR
* @param l bp;b;f>
* @param i eBBqF!WDb
*/ mp>,TOi~s7
private void insertSort(int[] data, int start, int len) { qAHQZKk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3|l+&LF!IC
} T"XZ[q
} -7$7TD`'7
} DMsxHAE1
} QUwSnotgU
wHAoO#`wn5
堆排序： .G4(Ryh
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package org.rut.util.algorithm.support; 0,E*9y}
LoqS45-)
import org.rut.util.algorithm.SortUtil; xW!2[.O5H
,*wa#[
/** 3g^_Fq'
* @author treeroot (Lp<T!"
* @since 2006-2-2 yM=%a3
* @version 1.0 ,J!G-?:@n
*/ <TC\Nb$~
public class HeapSort implements SortUtil.Sort{ IBo)fE\O
x9p,j
/* (non-Javadoc) w0q.cj@nd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xOt%H\*k"
*/ AKzhal!
public void sort(int[] data) { :Fm;0R@/k
MaxHeap h=new MaxHeap(); N/4`afiV.
h.init(data); .|G([O^H
for(int i=0;i h.remove(); vB hpD
System.arraycopy(h.queue,1,data,0,data.length); ~$Xz~#~
} XcAx@CY9c
XFUlV;ek
private static class MaxHeap{ T/X[q7O~~4
iLIH |P%
void init(int[] data){ i<m1^a#C'
this.queue=new int[data.length+1]; 2I3MV:5
for(int i=0;i queue[++size]=data; pIXbr($
fixUp(size); ")q
} LK-2e$1
} )Gi!wm>zvN
<]2X~+v
private int size=0; 96fbMP+7R
6F(;=iY8
private int[] queue; ?suxoP%
N\1 EWi
public int get() { 5 <X.1T1
return queue[1]; k2(B{x}L
} ;G|5kvE>
,qz$6oxh\
public void remove() { ,9SBGxK5`
SortUtil.swap(queue,1,size--); w@ALl#z;}
fixDown(1); IlJ!jq
} nYhI0q
file://fixdown W|XW2`3p
private void fixDown(int k) { H$bu*o-Z
int j; 8E`A`z
while ((j = k << 1) <= size) { UFr ]$m&
if (j < size %26amp;%26amp; queue[j] j++; qRlS^=#
if (queue[k]>queue[j]) file://不用交换 >> yK_yg
break; e%Rg,dX
SortUtil.swap(queue,j,k); OuWG.Za
k = j; ]q~_
} G6]W'Kk
} !VBl/ aU@
private void fixUp(int k) { X,DG2HT
while (k > 1) { 7jPPN
int j = k >> 1; #;4<dDVy
if (queue[j]>queue[k]) >rJ9^rS
break; l6]:Zcd0
SortUtil.swap(queue,j,k); l.[S.@\=.
k = j; SM;UNIRVE
} W@Et
} 0eP7efy
<]1Z
} 4HG;v|Cp
XRARgWj
} -9W)|toWb"
O~D>F*_^j
SortUtil： YGFE(t;lPU
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package org.rut.util.algorithm; >|Yr14?7
y:,Ro@H%
import org.rut.util.algorithm.support.BubbleSort; oMey^]!
import org.rut.util.algorithm.support.HeapSort; 82d~>i%T
import org.rut.util.algorithm.support.ImprovedMergeSort; pbc<326X"
import org.rut.util.algorithm.support.ImprovedQuickSort; T rK-XTev
import org.rut.util.algorithm.support.InsertSort; wyWe2d
import org.rut.util.algorithm.support.MergeSort; /&1FgSARK
import org.rut.util.algorithm.support.QuickSort; moz*=a
import org.rut.util.algorithm.support.SelectionSort; !(2rU@.
import org.rut.util.algorithm.support.ShellSort; Ns ezUk8'
)zn`qaHK@e
/** Lmh4ezrdH
* @author treeroot "Bn8WT2?
* @since 2006-2-2 CNU,\>J@$
* @version 1.0 mcO/V-\5'
*/ drRi<7 i
public class SortUtil { K X0{dizZ
public final static int INSERT = 1; nD#QC=}
public final static int BUBBLE = 2; W5a7HkM
public final static int SELECTION = 3; '$nm~z,V
public final static int SHELL = 4; &}}UdJ`
public final static int QUICK = 5; fib#)KE
public final static int IMPROVED_QUICK = 6; d!>.$|b
public final static int MERGE = 7; vNo(`~]c
public final static int IMPROVED_MERGE = 8; T'C^,,if
public final static int HEAP = 9; 'Z;8-1M?O
P)D2PVD
public static void sort(int[] data) { jgpSFb<9F
sort(data, IMPROVED_QUICK); 5 1&||.
} _TLB1T^/4
private static String[] name={ 0o-.m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u_31Db<
}; oJ4OVfknD
+hiskV@v
private static Sort[] impl=new Sort[]{ L?h'^*F H}
new InsertSort(), }(MI}o}
new BubbleSort(), qK=uSLo\+
new SelectionSort(), nev@ykP6
new ShellSort(), {"e)Jj_=
new QuickSort(), V7~tIhuJH
new ImprovedQuickSort(), =o_Ua^mr
new MergeSort(), ]]"O)tWHj
new ImprovedMergeSort(), ^qR2!fwm<
new HeapSort() ;-]' OiS;
}; )SjhOvm
-2DvKW$
public static String toString(int algorithm){ 9Su4nt`i
return name[algorithm-1]; cpLlkR O
} JJE?!Yvc
<A~a|A-QFR
public static void sort(int[] data, int algorithm) { r3OR7f[
impl[algorithm-1].sort(data); vIzREu|5
} `PoFKtVXM
Gn?NY}.S
public static interface Sort { rm}%C(C{J
public void sort(int[] data); Fi!BXngbd
} ue8"_N
PAYS~MnV@3
public static void swap(int[] data, int i, int j) { ctk~}(1#
int temp = data; Sj(5xa[
data = data[j]; ]0dj##5tJ
data[j] = temp; ]wxjd l
} azBYh*s=5{
} .dwy+BzS