[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; !RI _Uph
} |3'
int i1=l; >$4#G)s
int i2=mid+1; $d?W1D<A
for(int cur=l;cur<=r;cur++){ j,k3]bP
if(i1==mid+1) h !^= c
data[cur]=temp[i2++]; 8q[; 0
else if(i2>r) &zEQbHK6
data[cur]=temp[i1++]; Du+W7]yCl
else if(temp[i1] data[cur]=temp[i1++]; %\m"Yi]
else jW'YQrj{<Y
data[cur]=temp[i2++]; SGAzeymw
} vgwpuRL5b
} n3a.)tcC
_%nz-I
} ^e.-Ji
pE5v~~9Ikv
改进后的归并排序: HuevDy4
`L'g<VK;
package org.rut.util.algorithm.support; RxP H[7oZ
yix[zfQt0
import org.rut.util.algorithm.SortUtil; 6zi>Q?] 1
<CyU9`ye
/** vY4sU@+V
* @author treeroot AQ~ xjU
* @since 2006-2-2 G!q[NRu
* @version 1.0 G*CPj^O
*/ W7S~~
public class ImprovedMergeSort implements SortUtil.Sort { FnO@\{M"A
UkL1h7}a\
private static final int THRESHOLD = 10; YZol4q|ic
Q\$3l'W
/* <`}P
* (non-Javadoc) Pxlc RF
* ']M/'CcM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cM#rus?)+
*/ F$7!j$ Z
public void sort(int[] data) { _'=,c"
int[] temp=new int[data.length]; 40t xZFQ0
mergeSort(data,temp,0,data.length-1); (\AN0_
} --5F*a{R|
-vvyG
private void mergeSort(int[] data, int[] temp, int l, int r) { [X(4( 1i
int i, j, k; aFnel8
int mid = (l + r) / 2; \9?[|m z
if (l == r) 5n@YNaoIb
return; UqP{Cyy{
if ((mid - l) >= THRESHOLD) ]\(8d[4
mergeSort(data, temp, l, mid); s4|\cY`b-
else 7r:h_r-
insertSort(data, l, mid - l + 1); '~[8>Q>
if ((r - mid) > THRESHOLD) 5J5?cs-!
mergeSort(data, temp, mid + 1, r); w#"\*SKK
else ^tB1Nu%
insertSort(data, mid + 1, r - mid); #Bd]M#J17a
bZnOX*y]
for (i = l; i <= mid; i++) { 5hrI#fpOR
temp = data; H"A%mrb
} >e;-$$e
for (j = 1; j <= r - mid; j++) { ]fyfL|(;
temp[r - j + 1] = data[j + mid]; V1aP_G-:
} hOj{y2sc
int a = temp[l]; @62T:Vl
int b = temp[r]; z(|^fi(
for (i = l, j = r, k = l; k <= r; k++) { 5ya9VZ5#
if (a < b) { fkV@3sj
data[k] = temp[i++]; gaF6j!p
a = temp; \@<7Vo,
} else { 4EB\R"rWXf
data[k] = temp[j--]; jI-a+LnEm
b = temp[j]; a|ufm^F
} *6Wiq5M>.
} (V{/8%mWc
} `Q@7,z=f
M(-)\~9T
/** Ca2r<|uA
* @param data LPvp (1
* @param l 1NZ"\9=U
* @param i AxEyXT(h5
*/ 8D*7{Q
private void insertSort(int[] data, int start, int len) { 1.3#PdMR,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q W(@p`
} M:+CW;||!
} E]V, @
} (,|,j(=]
} W`>|OiuF
;:;E|{e
堆排序： UK=ELvt]
,.,8-In^
package org.rut.util.algorithm.support; iJs~NLCgVu
{:X'9NEE
import org.rut.util.algorithm.SortUtil; vX+oZj
DX_mrG
/** e(c\U}&
* @author treeroot _4S^'FDo
* @since 2006-2-2 "hIYf7r##
* @version 1.0 $WAwMS,
*/ v">?`8V
public class HeapSort implements SortUtil.Sort{ 1T^WMn:U
-U|c~Cqc
/* (non-Javadoc) -]N2V'QB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %>|FJ
*/ 6= ?0&Bx&
public void sort(int[] data) { ;_}pIO
MaxHeap h=new MaxHeap(); 2#wnJdr6E
h.init(data); bWe2z~dP
for(int i=0;i h.remove(); w\buQ6pR)
System.arraycopy(h.queue,1,data,0,data.length); (.J/Ql0Y
} MO`Y&<g~A
%cF`x_h[j
private static class MaxHeap{ Y>x{ [er
0seCQANd
void init(int[] data){ >AJ/!{jD*
this.queue=new int[data.length+1]; QkrQM&Im
for(int i=0;i queue[++size]=data; 3",gjXmBu
fixUp(size); >* -IIo
} 9b. kso9.
} c`O~I<(Pm
{oQs*`=l>
private int size=0; 8}QM~&&.
sW>%mnx
private int[] queue; fc#9e9R
{lI}a8DP
public int get() { x9lA';})
return queue[1]; AL]gK)R
} .$U,bE
N_Us6X
public void remove() { Q'<AV1<
SortUtil.swap(queue,1,size--); a&s34Pd
fixDown(1); +gl\l?>sr
} =s\$i0A2
file://fixdown mxlh\'b
private void fixDown(int k) { %ZVYgtk;*
int j; d4y#n=HnnV
while ((j = k << 1) <= size) { $QJ3~mG2
if (j < size %26amp;%26amp; queue[j] j++; 1?'4%>kp
if (queue[k]>queue[j]) file://不用交换 /@LkH$
break; :6Ri% Nb
SortUtil.swap(queue,j,k); G(E1c"?
k = j; ~[CFs'`(2
} z:Am1B
} ZTR9e\F
private void fixUp(int k) { N R c4*zQJ
while (k > 1) { '!m6^*m|c
int j = k >> 1; xpdpD
if (queue[j]>queue[k]) ~kW?]/$h
break; +tPBm{|
SortUtil.swap(queue,j,k); Nh\vWAz9
k = j; 'rhgM/I
} Lu#qo^
} \HGf!zZ
R+LKa Z
} 1Vpti4OmU
rC8p!e.yL
} #-yCR
Lx,=Up.
SortUtil： >)M{^
Z],j|rWy6
package org.rut.util.algorithm; ;21D^e
,YD7p= PY
import org.rut.util.algorithm.support.BubbleSort; kjYM&q
import org.rut.util.algorithm.support.HeapSort; _LJF:E5L
import org.rut.util.algorithm.support.ImprovedMergeSort; =MNp;
import org.rut.util.algorithm.support.ImprovedQuickSort; wR%Ta-
import org.rut.util.algorithm.support.InsertSort; {/QVs?d
import org.rut.util.algorithm.support.MergeSort; wnS,Jl
import org.rut.util.algorithm.support.QuickSort; D:T]$<=9
import org.rut.util.algorithm.support.SelectionSort; wOAR NrPx2
import org.rut.util.algorithm.support.ShellSort; f|{iW E2d
8'PZA,CW
/** 6n]+(=
* @author treeroot G)amng/
* @since 2006-2-2 c}(H*VY2n
* @version 1.0 (p>|e\(]0
*/ Qx)b4~F?
public class SortUtil { A.>mk598
public final static int INSERT = 1; X%yG{\6:
public final static int BUBBLE = 2; (d_z\U7l
public final static int SELECTION = 3; Z"8lW+r*
public final static int SHELL = 4; ovKM;cRs/
public final static int QUICK = 5; kX8C'D4 gX
public final static int IMPROVED_QUICK = 6; /p !A:8
public final static int MERGE = 7; PYCN3s#Gi
public final static int IMPROVED_MERGE = 8; x7S\-<8
public final static int HEAP = 9; !Gmnck&+
~nA k-toJ
public static void sort(int[] data) { O},}-%G
sort(data, IMPROVED_QUICK); ed6@o4D/kf
} M@ U>@x;
private static String[] name={ :+\0.\K0!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1'&.6{)P
}; _,drOF|e
hU$aZ
private static Sort[] impl=new Sort[]{ gGrVpOzBj
new InsertSort(), ,iV%{*p]
new BubbleSort(), @f-:C+(Nsg
new SelectionSort(), 3"x_Y
new ShellSort(), _ $a3lR
new QuickSort(), H$%MIBz>$
new ImprovedQuickSort(), ^MpMqm1?8;
new MergeSort(), 0GUJc}fgvN
new ImprovedMergeSort(), Da-Lf2qT9
new HeapSort() x?L[*N_ml
}; FJ3S
@1*^ttC
public static String toString(int algorithm){ 3L&:
return name[algorithm-1]; 2 5 \S>
} .8YxEnXw)(
RBQ8+^
public static void sort(int[] data, int algorithm) { \OW:-
impl[algorithm-1].sort(data); I Cc{2l
} WZ-~F/:c%
.I^4Fc}&4
public static interface Sort { :-RB< Lj
public void sort(int[] data); B<d=;V
} LhL |ETrJ
e\6H.9=
public static void swap(int[] data, int i, int j) { ^*AI19w!Ys
int temp = data; U<'N=#A J
data = data[j]; TsFhrtnx&X
data[j] = temp; -lo?16w
} 9"P+K.%
} M+%Xq0`T