[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; "s]c79t
} bX:ARe O
int i1=l; ^< ,Np+
int i2=mid+1; n(gw%w+\7
for(int cur=l;cur<=r;cur++){ 0vs9# <&V
if(i1==mid+1) q=5#t~?
data[cur]=temp[i2++]; +FWkhmTv
else if(i2>r) Gv!* Qk4
data[cur]=temp[i1++]; r2T-=XWB
else if(temp[i1] data[cur]=temp[i1++]; / W}Za&]
else 0.+"K}
data[cur]=temp[i2++]; uOqWMRsoi
} !S[8w9q
} tIgKnKr^)
aD~3C/?aW
} f.`noZN
O7shY4Sr
改进后的归并排序: tVZjtGz=
xFpMn}CD
package org.rut.util.algorithm.support; $e;_N4d^
^3Ni
import org.rut.util.algorithm.SortUtil; N4%q-fi
38dXfl
/** fmvX;0O
* @author treeroot ? {Lp
* @since 2006-2-2 bGvALz'
* @version 1.0 V@Z8t8
*/ +'H_sMmi{
public class ImprovedMergeSort implements SortUtil.Sort { qJj;3{X2
[e )j,Q1
private static final int THRESHOLD = 10; 1.0S>+^JE
Z,Z34:-
/* )z9)oM\
* (non-Javadoc) j5ZeYcQ-
* t)LD-%F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b]s*z<|%
*/ ?Ovl(4VG
public void sort(int[] data) { cbl2D5s+i]
int[] temp=new int[data.length]; <h2WM (n
mergeSort(data,temp,0,data.length-1); =Uta5$\a)
} LqTyE
#]i*u1
private void mergeSort(int[] data, int[] temp, int l, int r) { 3u7N/OQ(
int i, j, k; edqekjh
int mid = (l + r) / 2; 8kw`=wSH>
if (l == r) Us'm9 J
return; rS>JzbWa
if ((mid - l) >= THRESHOLD) Z;bzp3v
mergeSort(data, temp, l, mid); =N`"%T@=
else c~(+#a
insertSort(data, l, mid - l + 1); N %-Cp)
if ((r - mid) > THRESHOLD) r>S?,qr
mergeSort(data, temp, mid + 1, r); KvC`6
else A('=P}I^
insertSort(data, mid + 1, r - mid); FW:x XK
T=}(S4n#BX
for (i = l; i <= mid; i++) { *doK$wYP
temp = data; pvJ@$L`'
} tFL/zqgm
for (j = 1; j <= r - mid; j++) { &}S#6|[i
temp[r - j + 1] = data[j + mid]; {Q[{H'Oa
} ^WP`;e
int a = temp[l]; FFl[[(`%D
int b = temp[r]; <J@Y=#G$2
for (i = l, j = r, k = l; k <= r; k++) { W6D|Rr.q
if (a < b) { ow*) 1eo
data[k] = temp[i++]; ci>+Zi6
a = temp; * c] :,5
} else { D0tmNV@
data[k] = temp[j--]; *z`_U]tP
b = temp[j]; h8oG5|Y
} $ +;`[b
} @CU3V+
} _niXl&C
-:`$8/A|
/** o&1ewE(O]
* @param data '$W@I
* @param l Qwb=N
* @param i *D1^Se
*/ mc;Z#"kf
private void insertSort(int[] data, int start, int len) { u~\u8X3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^#2w::Ds}!
} ppjd.
} jpZ, $
} ;sCf2TD,_
} \5 IB/*
Yjv}@i"
堆排序： ./LD
>tnQuFKg]
package org.rut.util.algorithm.support; zRdL-u%(#
3'6%P_S
import org.rut.util.algorithm.SortUtil; &Vfdq6Y]
4[|^78
/** *SQ hXTn
* @author treeroot AzVON#rj
* @since 2006-2-2 kDS
* @version 1.0 >S3iP?V7
*/ 9S@PY_ms
public class HeapSort implements SortUtil.Sort{ [op!:K0
eD/O)X
/* (non-Javadoc) `me2Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r k;k:<c
*/ ^AK<]r<?L?
public void sort(int[] data) { WY#A9i5Ge
MaxHeap h=new MaxHeap(); XeDiiI
h.init(data); Vu0jNKUV
for(int i=0;i h.remove(); C Fq3
System.arraycopy(h.queue,1,data,0,data.length); N"/jn_>+j
} $Zp\^cIE+
z9pv|
private static class MaxHeap{ blNJ
)#zc$D^U
void init(int[] data){ cS/\&%7u
this.queue=new int[data.length+1]; rvuskXdo
for(int i=0;i queue[++size]=data; xal+buOiP
fixUp(size); XRCiv
} %4Cs c
} c1M/:*?%
L5!aLv#
private int size=0; R9nW5f Nf
-hw^3Af
private int[] queue; ya3A^&:
bmVksi2b
public int get() { B)g7MG
return queue[1]; =.O8G=;DOA
} g-"@%ps
S/)P&V%
public void remove() { |oPCmsO3R{
SortUtil.swap(queue,1,size--); %1ZJi}~
fixDown(1); yEyx.Mh.Af
} 4;'o`K~*
file://fixdown Aq%TZ_m
private void fixDown(int k) { __M(dN(^
int j; +<7~yZ[Z8
while ((j = k << 1) <= size) { u)PB@
if (j < size %26amp;%26amp; queue[j] j++; #4iSQ$0
if (queue[k]>queue[j]) file://不用交换 ^JZ]?iny
break; @ofivCc<%
SortUtil.swap(queue,j,k); .6aC2A]es
k = j; n@ lf+
} , f{<
} WzZ<ZCHm
private void fixUp(int k) { @S\!wjl]C
while (k > 1) { Ya{$:90(4
int j = k >> 1; H)z}6[`
if (queue[j]>queue[k]) 4Ra
break; 2%UzCK
SortUtil.swap(queue,j,k); "C%<R
k = j; G(W/.*
} z ^t6VFM
} T#kPn#|
0w9)#e+JS
} TELN4*
<5(P4cm9
} _0dm?=
p&dpDJ?d:=
SortUtil： VWf&F`^B(
9`
package org.rut.util.algorithm; `~0)}K.F
a(RTb<
import org.rut.util.algorithm.support.BubbleSort; Hc^q_{}"
import org.rut.util.algorithm.support.HeapSort; l =~EweuM
import org.rut.util.algorithm.support.ImprovedMergeSort; 5<ZE.'O
import org.rut.util.algorithm.support.ImprovedQuickSort; &{E1w<uv
import org.rut.util.algorithm.support.InsertSort; y"6;O0
import org.rut.util.algorithm.support.MergeSort; Z6C!-a
import org.rut.util.algorithm.support.QuickSort; DCr&%)Ll
import org.rut.util.algorithm.support.SelectionSort; jez=q
import org.rut.util.algorithm.support.ShellSort; mh&wvT<:{
j=b?WNK
/** 8AL`<8$
* @author treeroot /vC|_G|{
* @since 2006-2-2 =y+gS%o$
* @version 1.0 sI\v}$(~
*/ OZ>w.$ue
public class SortUtil { _wMxKM
public final static int INSERT = 1; hZ@frbuowk
public final static int BUBBLE = 2; zA/tHlKc
public final static int SELECTION = 3; &zkuL
public final static int SHELL = 4; %gUf
public final static int QUICK = 5; HZ%2WM
public final static int IMPROVED_QUICK = 6; &[71~.Od
public final static int MERGE = 7; c"HB7
public final static int IMPROVED_MERGE = 8; 'w//d $+G_
public final static int HEAP = 9; ou8V7
Ai>=n;
public static void sort(int[] data) { iQs^2z#Bd
sort(data, IMPROVED_QUICK); &w15GO;4
} I)7STzlMj.
private static String[] name={ b>g&Pf#N!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xE>H:YPm
}; Y$JGpeq8w
4z6i{n-k
private static Sort[] impl=new Sort[]{ _v=S4A#tF
new InsertSort(), k*XI/k5Vc
new BubbleSort(), b,C2(?hg
new SelectionSort(), O_=2{k~s0
new ShellSort(), K9-;-{qb
new QuickSort(), AzFd#P
new ImprovedQuickSort(), 8(d Hn
new MergeSort(), 0QJ :
new ImprovedMergeSort(), DpD19)ouy
new HeapSort() RHO|g0
}; |T`ZK?B+u
c,@&Z#IZ`
public static String toString(int algorithm){ |w; hu]
return name[algorithm-1]; {"kEu
} Y=G9|7*lO
ki|KtKAu_9
public static void sort(int[] data, int algorithm) { H(|n,c
impl[algorithm-1].sort(data); v9*ugu[K9
} o,qq*}=
P}"=67$
public static interface Sort { }+mIP:T
public void sort(int[] data); <O<Kf:i&c1
} rF@njw@
/;5U-<qf
public static void swap(int[] data, int i, int j) { y5@#leM
int temp = data; ws/e~ T<c
data = data[j]; 69q#Zw[,,
data[j] = temp; # <?igtUO
} QK~44;LVIJ
} FS'|e?WU