[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; 8zQN[[#n
} o@ @|4 F
int i1=l; _% i!LyG
int i2=mid+1; E+J+fi
for(int cur=l;cur<=r;cur++){ Ehq [4}
if(i1==mid+1) ) .W0}
data[cur]=temp[i2++]; Q}#xfrprF
else if(i2>r) y<PQ$D)
data[cur]=temp[i1++]; zA|)9Dq
else if(temp[i1] data[cur]=temp[i1++]; X?Or.
else w!OYH1ds]_
data[cur]=temp[i2++]; uCc5)
} &.JJhX
} }j{Z &(K
&}d5'IRT
} f<>CSjQ4c
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改进后的归并排序: $?uLFD
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package org.rut.util.algorithm.support; ptlag&Z
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import org.rut.util.algorithm.SortUtil; T-Yb|@4
Wz;@Rl|F
/** y 7z)lBy\
* @author treeroot k=9k4l
* @since 2006-2-2 2yVQqwQm
* @version 1.0 (V0KmNCW`
*/ 9[h8Dy
public class ImprovedMergeSort implements SortUtil.Sort { 6uxF<
Zi<(>@z2
private static final int THRESHOLD = 10; DuIgFp
U5[r&Y D
/* py6O\` \
* (non-Javadoc) dv?t;D@p!
* }>_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l7U<]i GL
*/ i:H]Sb)<b
public void sort(int[] data) { x^McUfdr|
int[] temp=new int[data.length]; !\\OMAf7
mergeSort(data,temp,0,data.length-1); *!yA'z<
} 3*-!0
p]jG ,S
private void mergeSort(int[] data, int[] temp, int l, int r) { (&M,rW~Qxs
int i, j, k; GN+!o($
int mid = (l + r) / 2; /!U(/
if (l == r) \_7'f
return; ' ?a d
if ((mid - l) >= THRESHOLD) \vE-;,
mergeSort(data, temp, l, mid); v!AfIcEV
else Yn>FSq^Wp-
insertSort(data, l, mid - l + 1); M-(,*6Q
if ((r - mid) > THRESHOLD) 1jd.tup
mergeSort(data, temp, mid + 1, r); %yK- Q,'O
else \W|ymV_Ki
insertSort(data, mid + 1, r - mid); \/9O5`u*V
3gv?rJV
for (i = l; i <= mid; i++) { r9p ((ir
temp = data; 3&R1C>JS ]
} fONycXM]
for (j = 1; j <= r - mid; j++) { ?gCP"~
temp[r - j + 1] = data[j + mid]; 57EL&V%j
} X$eR RSW
int a = temp[l]; uM9Gj@_
int b = temp[r]; *r ('A
for (i = l, j = r, k = l; k <= r; k++) { XII',&
if (a < b) { m?=J;r"Re
data[k] = temp[i++]; P`y.3aK
a = temp; {x~r$")c?
} else { dJ~Occ1~r
data[k] = temp[j--]; :wfN+g=
b = temp[j]; 10_>EY`
} OX[r\
} uEkGo5
} ;aH3{TS
2#Qw
/** zL3I!& z2
* @param data TRr%]qd{Hr
* @param l ?y,KN}s_
* @param i [_*?~
*/ `:d\L H
private void insertSort(int[] data, int start, int len) { A2.4#Qb'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bL|$\'S
} pxCQ=0k
} z}Vg4\x&
} 0|,Ij$
} c=re(
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堆排序： \ *A!@T
WUb] 8$n
package org.rut.util.algorithm.support; 9ZDbZc
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import org.rut.util.algorithm.SortUtil; }/jWa|)f
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/** WsT
* @author treeroot W)L*zVj~
* @since 2006-2-2 pz"}o#R"x
* @version 1.0 s<5PsR
*/ ViU5l*n;
public class HeapSort implements SortUtil.Sort{ <:!:7
PmtXD6p3(
/* (non-Javadoc) Lc(eY{CY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [{zfI`6
*/ BY@l:y4
public void sort(int[] data) { bQdu=s[
MaxHeap h=new MaxHeap(); Rpj{!Ia
h.init(data); N9~'\O$'7
for(int i=0;i h.remove(); x#hSN|'"
System.arraycopy(h.queue,1,data,0,data.length); s\Ln
} /Eu|Jg=I
2rHQ7
private static class MaxHeap{ p+-IvU
K1p.{
void init(int[] data){ :mt<]Oy3
this.queue=new int[data.length+1]; i"mQ
for(int i=0;i queue[++size]=data; (4/W)L$
fixUp(size); s%G%s,d
} &d]@$4u$;
} wJu9.
NTVaz.
private int size=0; LtV,djk
GtKSA#oYZB
private int[] queue; r6It)PQ
Kd*=-
public int get() { nuw7pEW@?
return queue[1]; t >Rh
} z&\N^tBv
Y/ %XkDC~
public void remove() { TY?O$d2b3
SortUtil.swap(queue,1,size--); szD9z{9"y
fixDown(1); Az/B/BLB
} g*!1S
file://fixdown xl9S=^`=
private void fixDown(int k) { tjQ6[`
int j; dV /Es
while ((j = k << 1) <= size) { .UvDew/Y
if (j < size %26amp;%26amp; queue[j] j++; ,:0!+1
if (queue[k]>queue[j]) file://不用交换 ((M>To_l
break; fh`}~ aQ
SortUtil.swap(queue,j,k); z G`|)
k = j; V`G^Jyj
} w%(D4ldp
} k7]4TIUD*
private void fixUp(int k) { 7/iN`3Bz
while (k > 1) { g!Ui|]BI9
int j = k >> 1; # hw;aQ
if (queue[j]>queue[k]) (Dn1Eov
break; h<qi[d4X
SortUtil.swap(queue,j,k); kV4L4yE
k = j; +}eK8>2
} OyG2Ks"H
} )|W6Z
uH#X:Vne
} V{X/yN.u
y2R\SL,
} H|/"'t OZ
VO /b&%
SortUtil： +wZ|g6vMct
=&~ K;=:
package org.rut.util.algorithm; n*caP9B
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import org.rut.util.algorithm.support.BubbleSort; |hX\ep
import org.rut.util.algorithm.support.HeapSort; R7c42L\QA
import org.rut.util.algorithm.support.ImprovedMergeSort; 4}Lui9
import org.rut.util.algorithm.support.ImprovedQuickSort; e}(8BF
import org.rut.util.algorithm.support.InsertSort; ,l.+$G
import org.rut.util.algorithm.support.MergeSort; 9%riB/vkrF
import org.rut.util.algorithm.support.QuickSort; S'`RP2P
import org.rut.util.algorithm.support.SelectionSort; ,rOh*ebF
import org.rut.util.algorithm.support.ShellSort; h?vny->uJ
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/** 'C@yJf
* @author treeroot %BQ?DTtb7'
* @since 2006-2-2 W,:j>vg
* @version 1.0 i8%Z(@_`
*/ VBW][f
public class SortUtil { -b34Wz(
public final static int INSERT = 1; IR32O,)
public final static int BUBBLE = 2; {MUO25s02
public final static int SELECTION = 3; M XuHA?
public final static int SHELL = 4; <SdOb#2
public final static int QUICK = 5; ygd*zy9
public final static int IMPROVED_QUICK = 6; 65tsJ"a<
public final static int MERGE = 7; >fD%lq;
public final static int IMPROVED_MERGE = 8; Ex6Kxd}8
public final static int HEAP = 9; R<^E?FI
9fCU+s
public static void sort(int[] data) { bNHsjx@
sort(data, IMPROVED_QUICK); TQOJN
} 2}_^~8
private static String[] name={ HUbXJsSP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M7#CMLy
}; 6=x]20
hMgk+4*
private static Sort[] impl=new Sort[]{ e~nh95
new InsertSort(), I<"UQ\)
new BubbleSort(), iZ0(a
new SelectionSort(), '1d0 *5+6k
new ShellSort(), Hi U/fi`
new QuickSort(), #v4^,$k>
new ImprovedQuickSort(), fT<3~Z>m
new MergeSort(), {;o54zuKf
new ImprovedMergeSort(), #IeG/t(
new HeapSort() \*pS4vy5x
}; ClufP6'
@P[%6 d
public static String toString(int algorithm){ F5{GMn;j
return name[algorithm-1]; rLbFaLeQ
} AP9\]qZ(7
ssmJ?sl
public static void sort(int[] data, int algorithm) { qj^A
impl[algorithm-1].sort(data); cca]@Ox]
} }IQ![T5
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public static interface Sort { |7.X)h`
public void sort(int[] data); Z*(OcQ-
} bNoZ{ 7
gL1r"&^L
public static void swap(int[] data, int i, int j) { QwuSo{G
int temp = data; Ko "JH=<
data = data[j]; \?^ EFA+;
data[j] = temp; S)"vyGv
} i,L"%q)C
} L l,nt