[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; M:5K4$>Kx
} }zO>y%eI
int i1=l; #CV;Np
int i2=mid+1; \aY<| 7zK
for(int cur=l;cur<=r;cur++){ }wIF$v?M
if(i1==mid+1) d,5,OJY2f
data[cur]=temp[i2++]; ]B2%\}c
else if(i2>r) _spW~"|G
data[cur]=temp[i1++]; ,pTj'I
else if(temp[i1] data[cur]=temp[i1++]; )8Q;u8jm1
else j*6>{_[
data[cur]=temp[i2++]; wni^qs.i@3
} +lhjz*0
} ZL7#44
!*\J4bJe
} >d9b"T
)wM881_!
改进后的归并排序: Q2)CbHSz
aA6m5
package org.rut.util.algorithm.support; 75"&"*R/*G
>53Hqzm&
import org.rut.util.algorithm.SortUtil; ;"9$LHH*
nu6p{_M
/** B<Zm'hdX
* @author treeroot 2{6%+>jB
* @since 2006-2-2 B>kVJK`X
* @version 1.0 !r#36kO
*/ f;`7}7C
public class ImprovedMergeSort implements SortUtil.Sort { 2Kmnt(>
riu_^!"Z_
private static final int THRESHOLD = 10; ~p!=w#/
Nf^6t1se
/* 1)BIh~1{p
* (non-Javadoc) N|3a(mtiZ'
* DUMC4+i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W}iDT?Qi
*/ ul&}'jBr
public void sort(int[] data) { \gW6E^
int[] temp=new int[data.length]; #trb4c{{5
mergeSort(data,temp,0,data.length-1); ;uhpo
} `gSJEq
.5E6MF
private void mergeSort(int[] data, int[] temp, int l, int r) { +v)+ k
int i, j, k; "<$JU@P
int mid = (l + r) / 2; aInh?-
if (l == r) \uyZl2=WWa
return; *K'#$`2
if ((mid - l) >= THRESHOLD) +=Y$v2BZA3
mergeSort(data, temp, l, mid); XEL~y
else 0 /)OAw"m
insertSort(data, l, mid - l + 1); i4dy0jfN
if ((r - mid) > THRESHOLD) [KW9J}]
mergeSort(data, temp, mid + 1, r); nkO4~p
else #GfM!<q<
insertSort(data, mid + 1, r - mid); iGw\A!}w\
,opS)C$
for (i = l; i <= mid; i++) { rNl%I@G
temp = data; ]^6r7nfR6|
} %%{f-\-7Ig
for (j = 1; j <= r - mid; j++) { A5IW[Gu!
temp[r - j + 1] = data[j + mid]; h @2.D|c)g
} FwpTQix!
int a = temp[l]; y6P-:f/&*
int b = temp[r]; l H{~?x
for (i = l, j = r, k = l; k <= r; k++) { bNG7A[|B
if (a < b) { J] )gXVRM
data[k] = temp[i++]; 9!,f4&G`
a = temp; p1']+4r%
} else { N+zR7`AG8
data[k] = temp[j--]; ``,q[|
b = temp[j]; e% #?B *
} ?2<V./2F
} /y3Lc.-
} }PX8#C_P
zxrbEE Q
/** 4vMjVbr
* @param data /_V4gwb}|-
* @param l Is(ZVI
* @param i 'EO"0,
*/ 2&0#'Tb
private void insertSort(int[] data, int start, int len) { +wE>h>?;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l:14uWu|
} eEX*\1Gg
} D"<>!]@(a
} *@fVogr^
} Q[&CtM
X8 A$&
堆排序： +<^c2diX
ZJOO*S
package org.rut.util.algorithm.support; )P#xny2
xsRu~'f
import org.rut.util.algorithm.SortUtil; uC5W1LyI
|6w{%xC?"
/** bI:cYn1
* @author treeroot ,h},jkY4
* @since 2006-2-2 \os"j
* @version 1.0 **~1`_7~*
*/ P] Xl
public class HeapSort implements SortUtil.Sort{ e[g.&*!
7xfN}iHG
/* (non-Javadoc) D%h_V>#z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !U~S7h}
*/ ADT8A."R[
public void sort(int[] data) { #RWmP$+#=
MaxHeap h=new MaxHeap(); Jzj>=jWX@
h.init(data); c{\x<AwO
for(int i=0;i h.remove(); $sb `BS
System.arraycopy(h.queue,1,data,0,data.length); 6G;t:[H G
} ]Vd1fkXO0
8M6Qn7{L
private static class MaxHeap{ N3&n"w _d
,H5o/qNU`{
void init(int[] data){ 9@8)ZHf
this.queue=new int[data.length+1]; QV_Ep8
for(int i=0;i queue[++size]=data; _MzdbUb5,
fixUp(size); gjPbhY=C[
} gacE?bW'
} AxiCpAS;J
^03M~SNCj
private int size=0; RO8]R2A
;s w3MRJ
private int[] queue; 7s2e>6Q[
ZnRE:=
public int get() { ke5_lr(
return queue[1]; WbHI>tt
} zF_aJ+i:~
2-DJ3OL]k
public void remove() { %s#`Z [8,
SortUtil.swap(queue,1,size--); "/zDcZbL;
fixDown(1); Kc{~Q
} 4 moVS1
file://fixdown Wf9K+my
private void fixDown(int k) { FS6I?q#tQ
int j; |&\cr\T\r
while ((j = k << 1) <= size) { l1D"*J 2`
if (j < size %26amp;%26amp; queue[j] j++; DTM xfQdk
if (queue[k]>queue[j]) file://不用交换 h 7*#;j
break; F1b~S;lm
SortUtil.swap(queue,j,k); !K/zFYl
k = j; z1~FE
} F!&_
} m^Rf6O^
private void fixUp(int k) { k4BiH5\hA
while (k > 1) { Kv#TJn
int j = k >> 1; =d1R9O
if (queue[j]>queue[k]) ~w}Zv0
break; 42 &m)
SortUtil.swap(queue,j,k); L`0}wR?+
k = j; Z=y^9]
} \ Q0-yNt
} a+p_47 xa
:~B'6b
} \t+q1S1
|p @,]cz
} =y1/V'2E
GoRSLbCUR
SortUtil： P:tl)ob
a3(q;^v
package org.rut.util.algorithm; H_+!.
6ZwFU5)QE/
import org.rut.util.algorithm.support.BubbleSort; ${w\^6&
import org.rut.util.algorithm.support.HeapSort; m/>z}d05h
import org.rut.util.algorithm.support.ImprovedMergeSort; q NE(@at
import org.rut.util.algorithm.support.ImprovedQuickSort; * 57y.](w
import org.rut.util.algorithm.support.InsertSort; x2 m A
import org.rut.util.algorithm.support.MergeSort; H2D j`0
import org.rut.util.algorithm.support.QuickSort; 9lCZi?
import org.rut.util.algorithm.support.SelectionSort; 1F58 2 l
import org.rut.util.algorithm.support.ShellSort; +]NPxUa
T0Zv.
/** :Y>M//0
* @author treeroot f/K:~#k
* @since 2006-2-2 Tq=OYJq5U
* @version 1.0 !mtX*;b(e
*/ ^q ?xi5w
public class SortUtil { }!0nb)kL
public final static int INSERT = 1; mtu`m6Xix
public final static int BUBBLE = 2; T<=]Vg)^r"
public final static int SELECTION = 3; b|z_1j6U
public final static int SHELL = 4; 7SpF&
public final static int QUICK = 5; +x"cWOg
public final static int IMPROVED_QUICK = 6; (>gAnebN L
public final static int MERGE = 7; YQk<1./}I
public final static int IMPROVED_MERGE = 8; f MDM\&f
public final static int HEAP = 9; :D!}jN/)
6Jf\}^4@k
public static void sort(int[] data) { d %Z+.O
sort(data, IMPROVED_QUICK); m?=9j~F*
} }v?_.MtS
private static String[] name={ +r 2\v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fooQqWC)
}; "O,TL*$
T2V# fYCc
private static Sort[] impl=new Sort[]{ PgYq=|]`
new InsertSort(), ;'x\L<b/)
new BubbleSort(), 4 9zOhG |
new SelectionSort(), gAWrn^2L5
new ShellSort(), U~e^
new QuickSort(), E5}wR(i,4
new ImprovedQuickSort(), 7>Oa, \
new MergeSort(), ,wvzY7%
new ImprovedMergeSort(), ,`lVB#|
new HeapSort() ?m$7)@p
}; l*Iy:j(B
M!ra3Y
public static String toString(int algorithm){ ix=H=U]Q{
return name[algorithm-1]; (YJ]}J^
} P_f>a?OL:
5wws8w
public static void sort(int[] data, int algorithm) { ;f8$vW];
impl[algorithm-1].sort(data); Rr'^l]
} /:j9#kj
"?~u*5
public static interface Sort { -bHfo%"^TT
public void sort(int[] data); %)K)h&m
} 3g#fX{e_5!
D|1pBn.b]'
public static void swap(int[] data, int i, int j) { Q*+_%n1 /
int temp = data; 8VwByk8
data = data[j]; `Oc`I9
data[j] = temp; A%G \ AT
} 'h6Vj6
} Gv};mkX[N