[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; 7Y)wu$!7}
} ,VZ&Gc
int i1=l; kgIWgk%
int i2=mid+1; <,GHy/u\
for(int cur=l;cur<=r;cur++){ vBpg6 fX
if(i1==mid+1) EK'&S=]
data[cur]=temp[i2++]; `~RV
else if(i2>r) wx!*fy4hL
data[cur]=temp[i1++]; K c<z;
else if(temp[i1] data[cur]=temp[i1++]; zm:=d>D..
else UVLcR
data[cur]=temp[i2++]; =?lT&|"
} <_>6a7ra
} Yyo|W;a]
z>{KeX:
} TAi\#cnl(6
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改进后的归并排序: g IKm
w?*KO?K
package org.rut.util.algorithm.support; Pjy?&;GvT
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import org.rut.util.algorithm.SortUtil; !$?@;}=
KFhn}C3 i
/** (w-u"1&
* @author treeroot @r43F$bcqo
* @since 2006-2-2 ~Qsj)9
* @version 1.0 2%8Y-o?
*/ 3oKGeB;Ja
public class ImprovedMergeSort implements SortUtil.Sort { ^ZlV1G;/W@
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private static final int THRESHOLD = 10; nsp K.*?
8.^U6xA
/* zJ:r0Bt
* (non-Javadoc) kziBHis!
* AN>`M?EQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u s0'7|{q
*/ =tNiIU
public void sort(int[] data) { Tc(R-Wi
int[] temp=new int[data.length]; VB\6SG
mergeSort(data,temp,0,data.length-1); 9c^EoYpy-
} "{k )nr+7U
Ak1)
private void mergeSort(int[] data, int[] temp, int l, int r) { ,OCTm%6e
int i, j, k; nnNg^<[k3
int mid = (l + r) / 2; Sg$\ab$
if (l == r) T/;hIX:R
return; $te,\$&}
if ((mid - l) >= THRESHOLD) l{U3;
mergeSort(data, temp, l, mid); 6y_Z'@L
else )R@gnTe
insertSort(data, l, mid - l + 1); -],?kP
if ((r - mid) > THRESHOLD) cQ41NX@I
mergeSort(data, temp, mid + 1, r); Uq.~3V+u
else N]}+F w\5
insertSort(data, mid + 1, r - mid); 5ecz'eA%
}tZAU\z
for (i = l; i <= mid; i++) { N)*e^Nfb
temp = data; +-\9'Q
} P` F'Nf2U
for (j = 1; j <= r - mid; j++) { ;QQ7vo
temp[r - j + 1] = data[j + mid]; 5#)<rK
} HdUW(FZ
int a = temp[l]; KL mB
int b = temp[r]; -C}59G8
for (i = l, j = r, k = l; k <= r; k++) { grdyiBSVn
if (a < b) { _ICDtG^
data[k] = temp[i++]; j~H`*R=ld#
a = temp; `_A?a_[*
} else { vx@p;1RU`
data[k] = temp[j--]; [Be53U{=
b = temp[j]; "T%'Rp`j|
} p.] .M"A
} AV4HX\`{P0
} xJLO\B+gM
TY\"@(Q|G
/** <57l|}8
* @param data /VO@>Hoh
* @param l _0q~s@-
* @param i 8{fz0H.<?
*/ Q|KD/s??
private void insertSort(int[] data, int start, int len) { &]F|U3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ><MgIV
} }l?_Cfvu
} U<Y'.!
} W7=_u+0d
} \y`3LhY
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堆排序： -xu.=n@,
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package org.rut.util.algorithm.support; nvK7*-
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import org.rut.util.algorithm.SortUtil; niEEm`"
fKz"z{\,0
/** {kl{mJ*
* @author treeroot w1#jVcUQ
* @since 2006-2-2 kr`BUW3
* @version 1.0 ';\gR/L
*/ <GgtP55
public class HeapSort implements SortUtil.Sort{ u?3NBc$~A
AJ` v
/* (non-Javadoc) AV 5\W}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '#i]SU&*
*/ AOx3QgC^NO
public void sort(int[] data) { FT/5 _1i
MaxHeap h=new MaxHeap(); o-=d|dWG
h.init(data); FNm6/_u3
for(int i=0;i h.remove(); XVDd1#h
System.arraycopy(h.queue,1,data,0,data.length); +%qSB9_>N{
} EKd3$(^
Gz|%;
private static class MaxHeap{ x~9z`d{!
Ipz 1+ #s'
void init(int[] data){ d6@jEa-
this.queue=new int[data.length+1]; #O9*$eMw
for(int i=0;i queue[++size]=data; k\c &2T]W
fixUp(size); EcU'*
} -iDEh_pts
} b({Nf,(a2
RD$tc~@UB
private int size=0; mOgOHb2
q$?7 ~*M;x
private int[] queue; uz#PBV8Q
q_]
public int get() { U 'CfP9=
return queue[1]; myWmU0z/
} TG63
!jnqA Z
public void remove() { [Ql?Y$QB`4
SortUtil.swap(queue,1,size--); b4)*<Zp`
fixDown(1); QI#*5zm
} |pH* CCA
file://fixdown {y&\?'L'
private void fixDown(int k) { !0OD(XT
int j; hX8gV~E=y
while ((j = k << 1) <= size) { 1t[;`iZ
if (j < size %26amp;%26amp; queue[j] j++; fATA%eA8;
if (queue[k]>queue[j]) file://不用交换 H6ky)kF&
break; &V#zkW
SortUtil.swap(queue,j,k); Z<N&UFw7QJ
k = j; uZo`IKJ
} c{,y{2c]LT
} =X`]Ct8Z
private void fixUp(int k) { d{2y/
while (k > 1) { Im?= e
int j = k >> 1; tt7PEEf
if (queue[j]>queue[k]) {\svV 0)~
break; -7k|6"EwM
SortUtil.swap(queue,j,k); QtnM(m
k = j; Db#W/8 a8k
} fVH*dX'Jz
} [ZKtbPHb
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} 2q-:p8
bB;~,W&E1
} Q7uAf3
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SortUtil： \)^,PA3
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package org.rut.util.algorithm; N)y^</Ya
~m?74^ i
import org.rut.util.algorithm.support.BubbleSort; b(#"w[|
import org.rut.util.algorithm.support.HeapSort; FQk_#BkK
import org.rut.util.algorithm.support.ImprovedMergeSort; Mhb '^\px
import org.rut.util.algorithm.support.ImprovedQuickSort; H@%7\g,`
import org.rut.util.algorithm.support.InsertSort; vo(g0Au)
import org.rut.util.algorithm.support.MergeSort; pcI&
import org.rut.util.algorithm.support.QuickSort; M<{5pH(K
import org.rut.util.algorithm.support.SelectionSort; !fi &@k
import org.rut.util.algorithm.support.ShellSort; 9h:jFhsA9
z^gQ\\,4
/** &RKH2R
* @author treeroot 7P/?wv9+n*
* @since 2006-2-2 [$( sUc(%
* @version 1.0 4_Qa=T8
*/ y+4?U
public class SortUtil { }BI~am_
public final static int INSERT = 1; %[]"QbF?
public final static int BUBBLE = 2; oLrkOn/aY
public final static int SELECTION = 3; xFBh?
public final static int SHELL = 4; @-wNrW$
public final static int QUICK = 5; [&h#iTRT
public final static int IMPROVED_QUICK = 6; 6R1wn&8
public final static int MERGE = 7; ny12U;'s,
public final static int IMPROVED_MERGE = 8; Sf 024
public final static int HEAP = 9; eJU;*] xfH
.'t (-eT,
public static void sort(int[] data) { 2BoFyL*
sort(data, IMPROVED_QUICK); bz,Da
} O.@g/05C
private static String[] name={ Q`.'-iq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )XLj[6j0
}; >Z#uFt0<Pm
7?6xPKQ)H
private static Sort[] impl=new Sort[]{ e[x?6He,$
new InsertSort(), A Gv!c($
new BubbleSort(), 0+T*$=?
new SelectionSort(), ZYE' C
new ShellSort(), \%sPNw=e
new QuickSort(), BFBR/d[&
new ImprovedQuickSort(), m b%C}8D
new MergeSort(), W(;x\Nc7
new ImprovedMergeSort(), zKIGWH=qqm
new HeapSort() ;_mgiKHg
}; ]3n, AHA
c3=-Mq9Q
public static String toString(int algorithm){ ,>D ja59
return name[algorithm-1]; W|)GV0YM
} 99<4t$KH
E%<w5d.lq
public static void sort(int[] data, int algorithm) { v<L=!-b^
impl[algorithm-1].sort(data); nd.57@*M
} J.1O/Pw!.a
@SU8\:(U
public static interface Sort { X AQGG>
public void sort(int[] data); PT3>E5`Nu
} =WIE>*3[
WMW1B}Z3
public static void swap(int[] data, int i, int j) { R'rTE
int temp = data; ;tJWOm
data = data[j]; :]vA2
data[j] = temp; iV5}U2Vh
} wk" l[cH>
} hHcJN