[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; :=y5713
} KGM__ZO.
int i1=l; 2, )>F"R
int i2=mid+1; T='uqKW\
for(int cur=l;cur<=r;cur++){ T+nID@"36
if(i1==mid+1) V5(_7b#z``
data[cur]=temp[i2++]; BJwuN
else if(i2>r) uKAI->"
data[cur]=temp[i1++]; 9no<;1+j,
else if(temp[i1] data[cur]=temp[i1++]; $,@}%NlHc
else dvjj"F'Bf
data[cur]=temp[i2++]; " Bx@(
} qZ^ PC-
} "jyo'r
PolJo?HZ
} Q// @5m_
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改进后的归并排序: |&8XmexLb
IMwV9rF
package org.rut.util.algorithm.support; q~ aFV<Q
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import org.rut.util.algorithm.SortUtil; :W0p36"
xg/(
/** (0.oE%B",1
* @author treeroot eR \duZ!`
* @since 2006-2-2 nDdY~f.B
* @version 1.0 c ^ds|7i]a
*/ q6F1Rt
public class ImprovedMergeSort implements SortUtil.Sort { LH(P<k&
l%2VA
private static final int THRESHOLD = 10; THhxj)
> pb}@\;:
/* B{&W|z{$
* (non-Javadoc) ]]:K l
* T;(,9>Qsu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pv5S k8
*/ "O>~osj
public void sort(int[] data) { "b`#RohCi
int[] temp=new int[data.length]; *fc8M(]&d
mergeSort(data,temp,0,data.length-1); ~|Vqv{
} k_]'?f7Z
O80Z7
private void mergeSort(int[] data, int[] temp, int l, int r) { Oh1U=V2~
int i, j, k; E~}H,*)
int mid = (l + r) / 2; K*j OrQf`
if (l == r) &mN]U<N
return; fQib?g/G
if ((mid - l) >= THRESHOLD) .5; JnJI
mergeSort(data, temp, l, mid); C&Q[[k"kb
else ~$6` e:n
insertSort(data, l, mid - l + 1); :epBd3f
if ((r - mid) > THRESHOLD) U>*@VOgB
mergeSort(data, temp, mid + 1, r); e*T^:2oRl
else 5/P. 4<c7
insertSort(data, mid + 1, r - mid); (Z>?\iNJ
ppIXS(
for (i = l; i <= mid; i++) { <fHHrmZ#/.
temp = data; @xdtl{5G
} [,Rc&7p~R
for (j = 1; j <= r - mid; j++) { gH(#<f@ZI
temp[r - j + 1] = data[j + mid]; `/T.u&QF
} Ag0 6M U
int a = temp[l]; ]vf_4QW=
int b = temp[r]; ]Y]]X[@
for (i = l, j = r, k = l; k <= r; k++) { HR?T
if (a < b) { 8g8eY pG
data[k] = temp[i++]; +Iuu8t
a = temp; O8#]7\)
} else { <UO[*_,\
data[k] = temp[j--]; tLKf]5}f
b = temp[j]; $A~aNI
} 6P@K]jy& n
} vWmt<E|e
} vW.f`J,\D'
. h)VR 5?j
/** -l}"DP _
* @param data fPTLPcPP
* @param l *Jcd_D\-(1
* @param i J1(SL~e],
*/ lPz`?Hn
private void insertSort(int[] data, int start, int len) { &zgliT!If
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 56YqYu.
} `&x>2FJ
} U^[AW$WzU
} K+/wJ9^B
} V(K;Gc
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堆排序： p/0dtnXa(
Y/UvNb<lK
package org.rut.util.algorithm.support; k {{eyC
MA9E??p3\
import org.rut.util.algorithm.SortUtil; u)EtEl7Wq
LR.]&(kyd
/** _T.`+0UV
* @author treeroot uUp>N^mmVH
* @since 2006-2-2 a'HHUii=
* @version 1.0 LsGO~EiJ
*/ (5`(H.(
public class HeapSort implements SortUtil.Sort{ TPx0LDk%(
@ukL!AV?Y
/* (non-Javadoc) ]7,0>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WllQM,h
*/ OPUrz?p2C
public void sort(int[] data) { &N7q9t
MaxHeap h=new MaxHeap(); "<egm^Yq
h.init(data); rUV'DC?eE
for(int i=0;i h.remove(); =v|$dDz
System.arraycopy(h.queue,1,data,0,data.length); 3LQu+EsS
} J7WNgl% u
D?xR>Oo)
private static class MaxHeap{ g|^U?|;p
ae3 Gn}tf
void init(int[] data){ +Y+fM
this.queue=new int[data.length+1]; p;zT #%
for(int i=0;i queue[++size]=data; (@BB@G
fixUp(size); !6taOT>v
} (G{:O
} ~.e~YI80
Rbgy?8#9
private int size=0; &-IkM%_A9
;\13x][
private int[] queue; l:~ >P[
F6DVq8f9
public int get() { UY *Z`$
return queue[1]; YuO!Y9iEm
} W>CG;x{
b,ZBol|X
public void remove() { hG<W*g
SortUtil.swap(queue,1,size--); J8@bPS27q
fixDown(1); 9QF,ynE
} A)SnPbI-p
file://fixdown +*qTZIXj
private void fixDown(int k) { <gvgr4@^yR
int j; !_>/ r
while ((j = k << 1) <= size) { XGnC8Be{4
if (j < size %26amp;%26amp; queue[j] j++; ygV-Fv>PQ
if (queue[k]>queue[j]) file://不用交换 W-1Ub |8C
break; .zW.IM}Z
SortUtil.swap(queue,j,k); p7Yb8#XfU
k = j; CF_2ez1u0y
} ^D {v L
} q+4<"b+6G
private void fixUp(int k) { XS0NjZW
while (k > 1) { i#U_g:~wC
int j = k >> 1; cR6#$-a
if (queue[j]>queue[k]) .,p@ee$q
break; gHvkr?Cg
SortUtil.swap(queue,j,k); ]>(pQD
k = j; 51s3hX$
} EF6"PH+J@
} $L]E< gWrP
n3hlo@gYW
} &xFs0Ri(
#@uF?8u
} ARB^]
}Mc&yjhMrg
SortUtil： >lK:~~1
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package org.rut.util.algorithm; <3{>;^|e
c=:A/z{
import org.rut.util.algorithm.support.BubbleSort; kgFx
import org.rut.util.algorithm.support.HeapSort; 2cJ3b 0Xx
import org.rut.util.algorithm.support.ImprovedMergeSort; d[e;Fj!
import org.rut.util.algorithm.support.ImprovedQuickSort; KJ6:ZTbW
import org.rut.util.algorithm.support.InsertSort; o2riy'~
import org.rut.util.algorithm.support.MergeSort; AcY!
import org.rut.util.algorithm.support.QuickSort; J#k.!]r,Y
import org.rut.util.algorithm.support.SelectionSort; |0N1]Hf
import org.rut.util.algorithm.support.ShellSort; B}ASZYpW>
0\Myhh~DLE
/** c6F8z75U
* @author treeroot }zwHUf9q1
* @since 2006-2-2 n0@\x=9
* @version 1.0 dO[pm0
*/ naW!Mga
public class SortUtil { 'y:+w{I2o
public final static int INSERT = 1; JiHk`e`
public final static int BUBBLE = 2; ^Ea^t.c}_
public final static int SELECTION = 3; [yfi:|n1
public final static int SHELL = 4; Z=/bD*\g
public final static int QUICK = 5; IqmQQ_KH
public final static int IMPROVED_QUICK = 6; E\=23[0
public final static int MERGE = 7; 2/G`ej!*
public final static int IMPROVED_MERGE = 8; `n`aA)|<
public final static int HEAP = 9; h*X u/aOg
75#&hi/~
public static void sort(int[] data) { wWUt44:0O
sort(data, IMPROVED_QUICK); J*'#! xIa
} T,Zfz9{n
private static String[] name={ 3SWO_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UZRCJ
}; o;Ma)/P
M8' GbF=1
private static Sort[] impl=new Sort[]{ n g?kl|VG
new InsertSort(), 6(.]TEu0
new BubbleSort(), aJ}Cqk
new SelectionSort(), =^A/&[&31
new ShellSort(), :%vD hMHa
new QuickSort(), =M+enSu
new ImprovedQuickSort(), s+yX82Y
new MergeSort(), /MQI5Djg
new ImprovedMergeSort(), ~$3X>?Q
new HeapSort() jZvQMW
}; yzQ^KqLH
/SDDCZ`;|c
public static String toString(int algorithm){ $Sfx0?'
return name[algorithm-1]; %4rPkPAtrp
} s9-aPcA
rG|*74Q]
public static void sort(int[] data, int algorithm) { ,| EaW& 2
impl[algorithm-1].sort(data); w %sHA
} ;^j2>Azn
m;"i4!
public static interface Sort { zg=F;^oZ<
public void sort(int[] data); }6V` U9^g
} 1"Z61gXrz
gqf*;Z eU
public static void swap(int[] data, int i, int j) { u.s-/ g
int temp = data; L:g!f
data = data[j]; ^SouA[
data[j] = temp; g :me:M
} S%7^7MSqA
} .w`1;o