[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; 1'wwwxe7
} rcUXYJCh-
int i1=l; 5(0f"zY
int i2=mid+1; (he cvJ
for(int cur=l;cur<=r;cur++){ zyyt`
if(i1==mid+1) $Cw> z^}u
data[cur]=temp[i2++]; !e?g"5r{Bv
else if(i2>r) ]3Z?Q
data[cur]=temp[i1++]; <u2rb6
else if(temp[i1] data[cur]=temp[i1++]; `wRQ-<Y
else BFP (2j
data[cur]=temp[i2++]; t .*z)N
} B@Acm
} z DDvXz
42X N*br
} cn1UFmT
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改进后的归并排序: 7p'L(dq
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package org.rut.util.algorithm.support; UV}\#86!
UX3 ]cr
import org.rut.util.algorithm.SortUtil; {[~cQgCI
0F$;]zg
/** dc[w`
* @author treeroot (\^| @
* @since 2006-2-2 H4[];&]xr
* @version 1.0 g.![>?2$8
*/ <BoDLvW>
public class ImprovedMergeSort implements SortUtil.Sort { Y)*5M
W`HO Q
private static final int THRESHOLD = 10; oG5:]/F
q3a`Y)aVB
/* FV>j !>Y
* (non-Javadoc) am>X7
* y5;l?v94
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [J4 Aig
*/ ;8z40cD
public void sort(int[] data) { i[obQx S94
int[] temp=new int[data.length]; U40adP? a
mergeSort(data,temp,0,data.length-1); zrD];DP
} >05_#{up
%Z|]"=;6
private void mergeSort(int[] data, int[] temp, int l, int r) { @]$qJFXx
int i, j, k; "vVL52HwB
int mid = (l + r) / 2; :2#8\7IU^'
if (l == r) MRzrZZ%LQ
return; .I%p0ds1r
if ((mid - l) >= THRESHOLD) sU>!sxW
mergeSort(data, temp, l, mid); )Ih'0>=
else LwDm(gG
insertSort(data, l, mid - l + 1); &w@~@]
if ((r - mid) > THRESHOLD) fAMJFHW
mergeSort(data, temp, mid + 1, r); e_3KNQ`kA
else ,0ZkE}<=w
insertSort(data, mid + 1, r - mid); \wW'Hk=
(x7AV$N
for (i = l; i <= mid; i++) { P} =eR
temp = data; iwb]mJUA
} @.T w*t
for (j = 1; j <= r - mid; j++) { b"x[+&%i
temp[r - j + 1] = data[j + mid]; q^nSYp#
} 3fC|}<Wzt
int a = temp[l]; xi5/Wc6
int b = temp[r]; WU oGIT'
for (i = l, j = r, k = l; k <= r; k++) { -P!_<\q\l
if (a < b) { d0(GE4+/
data[k] = temp[i++]; BPAz.K Q
a = temp; q0Rd^c
} else { OE,uw2uaT
data[k] = temp[j--]; &%YFO'>>}
b = temp[j]; jn+NX)9
} UO-<~DgH
} `? ayc/TK
} { bjK(|
HA}pr6Z
/** ,/V'(\>
* @param data /rRQ*m_
* @param l -!]Ie4"
* @param i [kc%+j<g
*/ .:eNL]2%:
private void insertSort(int[] data, int start, int len) { j!c[$;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }hT1@I
} _E({!t"`
} JM8s]&
} .f'iod-
} LM_/:
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堆排序： RZykwD(
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package org.rut.util.algorithm.support; *,9.Bx*
,6[}qw)*
import org.rut.util.algorithm.SortUtil; Q>gU(
<,~ =o
/** 4uip!@$K
* @author treeroot \!8`kC
* @since 2006-2-2 @Yua%n6]#D
* @version 1.0 Is6<3eQ\x
*/ Zp|LCE"
public class HeapSort implements SortUtil.Sort{ [0GM!3YJ7
m,nV,}@J
/* (non-Javadoc) *"E?n>b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^&t(O1.-
*/ )2X ng_,
public void sort(int[] data) { "AjtNL5
MaxHeap h=new MaxHeap(); ;S+c<MSl
h.init(data); \~xOdqF/
for(int i=0;i h.remove(); YWA:741
System.arraycopy(h.queue,1,data,0,data.length); 4+mawyM
} n3{m "h3
fM]McZ9)D
private static class MaxHeap{ ki6`d?
~Z5?\a2Ld
void init(int[] data){ x q93>Hs
this.queue=new int[data.length+1]; t"1'B!4
for(int i=0;i queue[++size]=data; ak50]KYo
fixUp(size); `+b>@2D_
} +j5u[X
} &?3?8Q\
EmNB}\IYU
private int size=0; )@Yp;=l
f}bUuQrH-!
private int[] queue; 9/w'4bd
YgaJ*%\
public int get() { Co8b0-Z
return queue[1]; 5=Bj?xb$'
} w <]7:/
uK]@!gz
public void remove() { =5&)^
SortUtil.swap(queue,1,size--); \S;% "0!
fixDown(1); wxZnuCO%H8
} 3Z'{#<1>^;
file://fixdown G?QFF6)}!
private void fixDown(int k) { ~c!zTe
int j; EU,4qO
while ((j = k << 1) <= size) { c< gM
if (j < size %26amp;%26amp; queue[j] j++; ;?;D(%L
if (queue[k]>queue[j]) file://不用交换 mM~!68lR
break; G*BM'^0+
SortUtil.swap(queue,j,k); e#k9}n^+
k = j; S6H=(l58
} L}AR{
} !mL,Ue3/
private void fixUp(int k) { u*Oz1~
while (k > 1) { ^e8R43w:!
int j = k >> 1; P<kTjG
if (queue[j]>queue[k]) k`js~/Xv
break; VO(Ck\i}
SortUtil.swap(queue,j,k); sVkR7 ^KsG
k = j; %R;cXs4r
} 6u7(}K
} u7j-uVG
N(&FATZUW
} .mDqZOpf=4
p"H8;fPA0
} $?Aez/
mkBQX
SortUtil： ^yK94U;<Gy
kRiWNEw
package org.rut.util.algorithm; SX^fh.
~J<bwF
import org.rut.util.algorithm.support.BubbleSort; 'n:Ft
import org.rut.util.algorithm.support.HeapSort; ,_rarU)[J
import org.rut.util.algorithm.support.ImprovedMergeSort; *{4cc
import org.rut.util.algorithm.support.ImprovedQuickSort; NH'RU`U)
import org.rut.util.algorithm.support.InsertSort; `4}!+fXQ
import org.rut.util.algorithm.support.MergeSort; 3!Qt_,
import org.rut.util.algorithm.support.QuickSort; 7gVWu"
import org.rut.util.algorithm.support.SelectionSort; --.j&w
import org.rut.util.algorithm.support.ShellSort; #-'}r}1ZT
20?i4h_
/** XOqpys
* @author treeroot `zzX2R Je
* @since 2006-2-2 2)j\Lg_M
* @version 1.0 d`~#uN {
*/ c+a f=ac
public class SortUtil { G)# ,39P
public final static int INSERT = 1; (X>y)V
public final static int BUBBLE = 2; j%p~.kW5
public final static int SELECTION = 3; rG\m]C3E
public final static int SHELL = 4; CzvlZDo
public final static int QUICK = 5; m/eGnv;!
public final static int IMPROVED_QUICK = 6; &V=54n=O?
public final static int MERGE = 7; :ZL>JVk
public final static int IMPROVED_MERGE = 8; Vj2GK"$v
public final static int HEAP = 9; r`;C9#jZ
Z$ftG7;P0
public static void sort(int[] data) { g~B@=R
sort(data, IMPROVED_QUICK); t*qA.xc6
} vhL&az
private static String[] name={ ^F"*;8$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G0Wd"AV+
}; zl: u@!'
\Flq8S/t^
private static Sort[] impl=new Sort[]{ Y43#];
new InsertSort(), LV]\{'
new BubbleSort(), mSj[t
new SelectionSort(), Q%eBm_r;
new ShellSort(), ^1~/FU
new QuickSort(), ESomw
new ImprovedQuickSort(), b8]oI"&G
new MergeSort(), {?!hUi+
new ImprovedMergeSort(), p +T&9
new HeapSort() z!3Z^d`
}; `S~u4+y]
&R5M&IwL
public static String toString(int algorithm){ D{loX6
return name[algorithm-1]; $U8ap4EXM
} gMGg9U$@
pc.0;gN
public static void sort(int[] data, int algorithm) { P9>C!0 -x
impl[algorithm-1].sort(data); @[FFYVru
} >bZ#
8@A[`5
public static interface Sort { =#V11j
public void sort(int[] data); (mD]}{>
} 6=g7|}
v'>Yc#VJ
public static void swap(int[] data, int i, int j) { j |i6/Pk9J
int temp = data; s{,e^T
data = data[j]; <=-\so(
data[j] = temp; 62_$O"
} \1MDCP9:
} IW1\vfe