[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; 5|O~
} Iue}AGxu:{
int i1=l; uDD{O~wF,
int i2=mid+1; 6<1 2j7
for(int cur=l;cur<=r;cur++){ k;/K']4y
if(i1==mid+1) 2qd5iOhX+
data[cur]=temp[i2++]; 'F2g2W`
else if(i2>r) ncTPFv H5
data[cur]=temp[i1++]; ;QO3^P}
else if(temp[i1] data[cur]=temp[i1++]; wnUuoX(
else e~oh%l^C72
data[cur]=temp[i2++]; Nm$Ba.Rg
} eJbZA&:
} I+2#k\y
mR,w~wP
} ?vt#M^Q
oZ,J{I!L
改进后的归并排序: x{DTVa 6y2
`PY=B$?{4
package org.rut.util.algorithm.support; D/[;Y<X#V
w#6)XR|+,.
import org.rut.util.algorithm.SortUtil; [nc-~T+Mo
:j2?v(jT_l
/** M$u.lI
* @author treeroot gn//]|#H+
* @since 2006-2-2 Xwp6]lx
* @version 1.0 :; z]:d
*/ )J^5?A
public class ImprovedMergeSort implements SortUtil.Sort { T.(C`/VM
:$6mS[@|
private static final int THRESHOLD = 10; 2# 72B
h;Hg/jv
/* 1.0:
* (non-Javadoc) L"KKW c
* :6gRoMb]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m!5MGq~
*/ zMke}2
public void sort(int[] data) { %1mIngW=g
int[] temp=new int[data.length]; [][ze2+b
mergeSort(data,temp,0,data.length-1); ?K\r-J!Y
} ; ,Nvg6c
n\ 'PNB
private void mergeSort(int[] data, int[] temp, int l, int r) { n'To:
int i, j, k; &w!(.uDO
int mid = (l + r) / 2; R ;k1(p
if (l == r) #V{!|Y'
return; s"UUo|hM
if ((mid - l) >= THRESHOLD) l{I.l
mergeSort(data, temp, l, mid); S awf]/
else BUCPO}I
insertSort(data, l, mid - l + 1); tWyl&,3?1
if ((r - mid) > THRESHOLD) s6F0&L;N&
mergeSort(data, temp, mid + 1, r); cYgd1
else .],:pL9d
insertSort(data, mid + 1, r - mid); vA"LV+@
J#IVu?B
for (i = l; i <= mid; i++) { ;il+C!6zpf
temp = data; A("\m>g$b
} $D='NzE/
for (j = 1; j <= r - mid; j++) { p;qFMzyS9
temp[r - j + 1] = data[j + mid]; ?8qN8rk^+
} @;G%7&ps
int a = temp[l]; XXw>h4hl
int b = temp[r]; j.!5&^;u4
for (i = l, j = r, k = l; k <= r; k++) { Bz(L}V]\k
if (a < b) { eZ]>;5
data[k] = temp[i++]; z}Lf]w?
a = temp; @Q7^caG
} else { Quwq_.DU
data[k] = temp[j--]; 3*T/ 7\
b = temp[j]; bE,#,
} EQe$~}[
} q[Tl#*P?y
} )<%CI#s#
SP\s{,'F-b
/** rB-R(2 CCN
* @param data :IX,mDO
* @param l 8=@f lK
* @param i &_q8F,I \<
*/ p"7]zq]'
private void insertSort(int[] data, int start, int len) { ]s0GAp"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Py?e+[cN
} iGSF5S
} ;?q-]J?
} Q,M,^_
} .}GOHW)}
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堆排序： c'XSs
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package org.rut.util.algorithm.support; +f$ {r7
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import org.rut.util.algorithm.SortUtil; f,kV
l9]nrT1Hy
/** $VjMd f
* @author treeroot }~Do0XUH
* @since 2006-2-2 uGn BlR$}
* @version 1.0 H?eG5
*/ $> ;|
public class HeapSort implements SortUtil.Sort{ E@%1HO_
ecx_&J@D
/* (non-Javadoc) (/^?$~m"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A#{I-*D[
*/ WL|71?@C
public void sort(int[] data) { ]yQqx*
MaxHeap h=new MaxHeap(); +U<.MVOo.
h.init(data); A8QUfg@uK~
for(int i=0;i h.remove(); uP$i2Cy
System.arraycopy(h.queue,1,data,0,data.length); tJ*/5k &
} nVrV6w
<Qr*!-Kc6
private static class MaxHeap{ ;pS+S0U
oB@)!'
void init(int[] data){ MR: H3
this.queue=new int[data.length+1]; ^Y!$WP
for(int i=0;i queue[++size]=data; Zx`/88!x[
fixUp(size); JvEW0-B^l,
} N?8nlrDQ
} 3sRI7g
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private int size=0; C^LxJG{L5
aO}p"-'
private int[] queue; vXZP>
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public int get() { l: kW|
return queue[1]; t|9vb
} 'R2*3<
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public void remove() { M04u>| ,
SortUtil.swap(queue,1,size--); $C,`^n'
fixDown(1); z =\ENG|x#
} yRDtPK"E-
file://fixdown [,;O$j}
private void fixDown(int k) { oLtzPC
int j; 1vAJ(O{-
while ((j = k << 1) <= size) { fh66Gn,
if (j < size %26amp;%26amp; queue[j] j++; "rc QS H
if (queue[k]>queue[j]) file://不用交换 R&:Qy7"
break; 7<L!" 2VB
SortUtil.swap(queue,j,k); bSQj=|h1
k = j; Z#l6BXK
} Z^Wv(:Nr
} /!.]Y8yEH
private void fixUp(int k) { ]dV$H
while (k > 1) { /Z~$`!J
int j = k >> 1; 2f{a||
if (queue[j]>queue[k]) xX0wn?,~
break; YG5mzP<T
SortUtil.swap(queue,j,k); {9) HB:
k = j; ({$rb-
} +VJyGbOcC
} ynf!1!4
(]VY==t~
} ay`R jT
;>fM?ae5
} 0-uVmlk=/
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SortUtil： XeslOsHh
bA'N2~.,
package org.rut.util.algorithm; yigq#h^
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import org.rut.util.algorithm.support.BubbleSort; -G'3&L4 D
import org.rut.util.algorithm.support.HeapSort; -i_XP]b&
import org.rut.util.algorithm.support.ImprovedMergeSort; b/\l\\$-
import org.rut.util.algorithm.support.ImprovedQuickSort; epG =)gd=8
import org.rut.util.algorithm.support.InsertSort; q0['!G%["
import org.rut.util.algorithm.support.MergeSort; _EP~PW#J
import org.rut.util.algorithm.support.QuickSort; k9NHdi7&2
import org.rut.util.algorithm.support.SelectionSort; |Ho} D~
import org.rut.util.algorithm.support.ShellSort; [@3.dd
Uc ; S@
/** ixoN#'y<"
* @author treeroot T-x9IoE
* @since 2006-2-2 aZ|S$-}
* @version 1.0 L$"pk{'
*/ b`}hw"f
public class SortUtil { U'Y,T$Q
public final static int INSERT = 1; Y:Jgr&*,z
public final static int BUBBLE = 2; <K>qK]|C
public final static int SELECTION = 3; eOfVBF<C2
public final static int SHELL = 4; H;DjM;be
public final static int QUICK = 5; nU6UjC|3
public final static int IMPROVED_QUICK = 6; jR+kx:+
public final static int MERGE = 7; V@EyU/VJ
public final static int IMPROVED_MERGE = 8; C~nL3w
public final static int HEAP = 9; (.wR!l#!
M~y}0Ik
public static void sort(int[] data) { gO@LJ
sort(data, IMPROVED_QUICK); Id>I.e4
} 64<*\z_
private static String[] name={ 9A|9:OdG1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n;:C{5
}; :2XX~|
ta'wX
private static Sort[] impl=new Sort[]{ 6?JvvS5
new InsertSort(), M!%|IKw
new BubbleSort(), Sogt?]HB$
new SelectionSort(), ^V]IPGV
new ShellSort(), 5aXE^.`
new QuickSort(), 0< }BSv
new ImprovedQuickSort(), EN8xn9M?
new MergeSort(), 'TA !JB+
new ImprovedMergeSort(), M7-2;MZ
new HeapSort() )M"xCO3a
}; QR<<O
w02C1oGfx
public static String toString(int algorithm){ ''q#zEf6
return name[algorithm-1]; OsRizcgdA
} b dC
2i NZz
public static void sort(int[] data, int algorithm) { QHnC(b
impl[algorithm-1].sort(data); ;0uiO.
} 1?Tj
.S* sGauM
public static interface Sort { K<50>uG
public void sort(int[] data); WYkh'sv >
} O]j<$GG!
::-*~CH)
public static void swap(int[] data, int i, int j) { mMO]l(a&
int temp = data; Z.s0ddMs
data = data[j]; =j{Kxnv
data[j] = temp; vkeZ!klYB
} "M^mJl&*b
} 10bv%ZX7