[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; `yb,z
} =Rf!i78c5
int i1=l; %X\rP,
int i2=mid+1; f,0oCBLPO
for(int cur=l;cur<=r;cur++){ sv>c)L}I
if(i1==mid+1) A$'rT|>se
data[cur]=temp[i2++]; 9TE-'R@
else if(i2>r) IPh_QE2g
data[cur]=temp[i1++]; (XA]k%45
else if(temp[i1] data[cur]=temp[i1++]; h,Tsb:Q"M
else 1QDAfRx
data[cur]=temp[i2++]; (/_Z^m9
} )Chx,pcx<
} /aMeKM[L`
TCO^9RP<
} "IsDL^)A9
NB/ wJ3 F
改进后的归并排序: T$xY]hqr
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package org.rut.util.algorithm.support; }~o>H a;
[hXU$Y>"0
import org.rut.util.algorithm.SortUtil; /&'rQ`nd
cd*F;h
/** ,W<mz7Z(@
* @author treeroot A?OaP
* @since 2006-2-2 GfT`>M?QGK
* @version 1.0 6t6#<ts
*/ !Zf)N_k
public class ImprovedMergeSort implements SortUtil.Sort { ,ffH:3F
KbF,jm5
private static final int THRESHOLD = 10; d\aU rsPn
U_c9T>=
/* ur`:wR] 2?
* (non-Javadoc) 2f@gR9T
* JS1''^G&.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [VwoZX:
*/ (%EhkTb
public void sort(int[] data) { fqU*y 6]
int[] temp=new int[data.length]; i(XqoR-x
mergeSort(data,temp,0,data.length-1); 7L&=z$U@m
} G8oOFBQD
U ()36
private void mergeSort(int[] data, int[] temp, int l, int r) { 8U>f/dxLOO
int i, j, k; $q;dsW,8
int mid = (l + r) / 2; t@EHhiBz
if (l == r) k GzosUt
return; lGr(GHn
if ((mid - l) >= THRESHOLD) !pLQRnI}6
mergeSort(data, temp, l, mid); Li_ a|dI
else x5}Ru0Z
insertSort(data, l, mid - l + 1); m48m5>
if ((r - mid) > THRESHOLD) 5*pCb,z>q
mergeSort(data, temp, mid + 1, r); J$D#)w!$j
else QR($KW(
insertSort(data, mid + 1, r - mid); /A;!g5Y
`!\`yI$!%w
for (i = l; i <= mid; i++) { BI-xo}KI
temp = data; @{!c [{x,T
} >*%mJX/F
for (j = 1; j <= r - mid; j++) { E5G=Kh[NP
temp[r - j + 1] = data[j + mid]; $fA%_T_P'P
} bO%bMZWB!y
int a = temp[l]; p M:lg
int b = temp[r]; H)5v X+9D
for (i = l, j = r, k = l; k <= r; k++) { E=Z.v
if (a < b) { k%)QrRnB
data[k] = temp[i++]; SXA_P{j&a
a = temp; ;'r} D!8w/
} else { cmv&!Egd
data[k] = temp[j--]; t)O$W
b = temp[j]; D f H>UA
} DLv\]\h}L
} .W<yiB}^
} WL<$(y:H
EnGVp<6R
/** C&m[/PJ~l
* @param data EI*B(
* @param l +Q3i&"QB.
* @param i W])<0R52
*/ L}1|R*b
private void insertSort(int[] data, int start, int len) { >>voLDDd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @exeHcW61
} gZe(aGh
} 9a5x~Z:'
} tTB,eR$
} Eh)PZvH
Z!P7mH\c}
堆排序： c1?_L(
)8:Ltn%
package org.rut.util.algorithm.support; cf#2Wg)
!A )2<<4
import org.rut.util.algorithm.SortUtil; 9""e*-;Mi
? -PRS.=%
/** l* =\0
* @author treeroot [kIiKLX
* @since 2006-2-2 >'^Tp7\
* @version 1.0 B`xrdtW
*/ Fcc\hV;
public class HeapSort implements SortUtil.Sort{ A&OU;j]
fWKI~/eUY|
/* (non-Javadoc) l.c*,9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >weY_%a
*/ |#);^z_
public void sort(int[] data) { +pcpb)VL
MaxHeap h=new MaxHeap(); dMw0Aw,2]8
h.init(data); ]kQ*t{\
for(int i=0;i h.remove(); +,&8U&~`
System.arraycopy(h.queue,1,data,0,data.length); 0yhC_mI
} k[0Gz
|^^'GZ%a
private static class MaxHeap{ _H9.AI
9gFema{U
void init(int[] data){ &>zzR$#1
this.queue=new int[data.length+1]; K]{Y >w
for(int i=0;i queue[++size]=data; yF-EHNNf
fixUp(size); WleE$ ,
} Wm{Lg0Nr
} :nZVP_d+
)_eEM1
private int size=0; a7+w)]r
7cTDbc!E-
private int[] queue; !=7(3<?
]_6w(>A@3#
public int get() { gJEm
return queue[1]; Em?Z
} ' XJ>;",[
SW!lSIk
public void remove() { ToWiXH)4
SortUtil.swap(queue,1,size--); #)&kF+
fixDown(1); x{_:B DY
} Ib(q9!L
file://fixdown +>b~nK>M
private void fixDown(int k) { ?6;9r[ p
int j; W_:3Sj l'
while ((j = k << 1) <= size) { i^9,.$<1
if (j < size %26amp;%26amp; queue[j] j++; =]k0*\PS
if (queue[k]>queue[j]) file://不用交换 ),ur!v
break; LO8`qq*rq
SortUtil.swap(queue,j,k); m5c?A+@fZ
k = j; %~eIx=s
} TUw+A6u:p
} {O ]^8#v^
private void fixUp(int k) { AI{Tw>hZ
while (k > 1) { ;m<22@,E&
int j = k >> 1; d<{>&
if (queue[j]>queue[k]) {t<E*5N]a
break; ~:`5Y"Av:
SortUtil.swap(queue,j,k); EDQKbTaPt
k = j; v?Z30?_&h
} Hd*e9;z
} #NU@7Q[4
5f;6BP
} 6V{Sf9V|
77KB-l2
} a8D7n Ea
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SortUtil： kiYHJ\a
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package org.rut.util.algorithm; !=(OvX_<
"DN0|%`M/
import org.rut.util.algorithm.support.BubbleSort; SlU?,)J}
import org.rut.util.algorithm.support.HeapSort; d 8YP<"V&
import org.rut.util.algorithm.support.ImprovedMergeSort; ~s3X&!#
import org.rut.util.algorithm.support.ImprovedQuickSort; L|B/'
import org.rut.util.algorithm.support.InsertSort; Q=YIAGK
import org.rut.util.algorithm.support.MergeSort; *0vq+C
import org.rut.util.algorithm.support.QuickSort; H(L.k;B
import org.rut.util.algorithm.support.SelectionSort; ?4k/V6n@y
import org.rut.util.algorithm.support.ShellSort; .|\}]O`
cQg:yoF
/** 'q3<R%^Q
* @author treeroot _C`&(?}
* @since 2006-2-2 z$64Ep#
* @version 1.0 WP5cC@x
*/ JVfSmxy.
public class SortUtil { (*~'#k
public final static int INSERT = 1; 6,wi81F,}
public final static int BUBBLE = 2; ?3[Gh9g`
public final static int SELECTION = 3; p**Sd[|
public final static int SHELL = 4; {KQ-QKxxS
public final static int QUICK = 5; >:o$h2
public final static int IMPROVED_QUICK = 6; @477|LO
public final static int MERGE = 7; I/2{I
public final static int IMPROVED_MERGE = 8; 55Pe&V1=
public final static int HEAP = 9; P2-^j)
Dq07Z^#'
public static void sort(int[] data) { n["G ry
sort(data, IMPROVED_QUICK); &`@S_YLr
} {lam],#r
private static String[] name={ {ef9ov Xk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KgD sqwy
}; xDqJsp=]-
M `O=rH }
private static Sort[] impl=new Sort[]{ qLjLfJJ2
new InsertSort(), u-s*3Lg&
new BubbleSort(), s9#WkDR
new SelectionSort(), PHAM(iC&D
new ShellSort(), Dj9v9
new QuickSort(), D02'P{
new ImprovedQuickSort(), YCPU84f
new MergeSort(), hwx1fpo4
new ImprovedMergeSort(), Rb/|ae
new HeapSort() ^X]rFY1
}; u0Q6+U
b=L4A,w~a
public static String toString(int algorithm){ Z=+Tw!wR>
return name[algorithm-1]; @23?II$=@
} I K9plsd*
Oj=g;iY
public static void sort(int[] data, int algorithm) { wZUZ"Y}9
impl[algorithm-1].sort(data); $.Ia;YBf
} eoj(zY3
D6I-:{ws
public static interface Sort { m|uVmg!*
public void sort(int[] data); F ,;B
} wiFA3_\G
"lVbla4b
public static void swap(int[] data, int i, int j) { .u3;
int temp = data; po! [Nd&"
data = data[j]; uVth&4dh9
data[j] = temp; tf3R
} /KTWBcs 7
} d[F3"b%