[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; :47bf<w|Y
} &# ?2zbZ
int i1=l; Z@G[\"
int i2=mid+1; nH=8I~jp
for(int cur=l;cur<=r;cur++){ @g{FNXY$m
if(i1==mid+1) 3iI 4yg
data[cur]=temp[i2++]; BM,]Wjfdj
else if(i2>r) %]m/fo4b
data[cur]=temp[i1++]; \pVmSac,
else if(temp[i1] data[cur]=temp[i1++]; z{N~AaY
else ]#fmih^
data[cur]=temp[i2++]; m/T3Um
} #BZ2%\
} ?E*;fDEC
oieJ7\h]m
} 1#D&cx6
%\|9_=9Wn
改进后的归并排序: {%"n[DLps
$q iY)RE
package org.rut.util.algorithm.support; Q/[g|"
R'udC}
import org.rut.util.algorithm.SortUtil; @|jLw($Ly
PXRkK63
/** a At<36{?
* @author treeroot 5C|Y-G
* @since 2006-2-2 T.}wcQf&*
* @version 1.0 6Bop8B
*/ `u't
public class ImprovedMergeSort implements SortUtil.Sort { ~fV\ X*
!*tV[0i2
private static final int THRESHOLD = 10; '<JNS8h
{#_CzI.0f
/* UK7pQt}9
* (non-Javadoc) p";5J+?(
* ]+ KN9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \|gE=5!Am=
*/ z[0+9=<Y
public void sort(int[] data) { <0w"$.K#3
int[] temp=new int[data.length]; cR*5iqA
mergeSort(data,temp,0,data.length-1); @BfJb[A#
} :< d.
jv4O
private void mergeSort(int[] data, int[] temp, int l, int r) { QH d^?H*
int i, j, k; GI[TD?s
int mid = (l + r) / 2; O?=YY@j
if (l == r) 2I@d=T{K
return; $5]}]
if ((mid - l) >= THRESHOLD) R[#vFQ
mergeSort(data, temp, l, mid); +I$,Y~&`>
else /FthT
insertSort(data, l, mid - l + 1); Xv&&U@7
if ((r - mid) > THRESHOLD) (^@rr[.o7
mergeSort(data, temp, mid + 1, r); d:X@zUR*)
else -91*VBrOd
insertSort(data, mid + 1, r - mid); yd|roG/
Km)VOX[ZZ
for (i = l; i <= mid; i++) { L* 0$x
temp = data; a7fFp9l!
} @,:6wKMc
for (j = 1; j <= r - mid; j++) { 44x+2@&1
temp[r - j + 1] = data[j + mid]; lM|}K-2
} @fc-[pv
int a = temp[l]; \}n\cUy-
int b = temp[r]; h]>QGX[kC
for (i = l, j = r, k = l; k <= r; k++) { P2!+ZJ&
if (a < b) { 28! ke
data[k] = temp[i++]; "M!]t,?S
a = temp; =] +owl2
} else { N8E
data[k] = temp[j--]; v:1DNR4
b = temp[j]; 3-PqUJT$
} CiNOGSlDj
} 2bnYYQ14:
} z%Eok
(B^rW,V[R
/** M/mm2?4
* @param data 7@1GSO:Yf
* @param l ]i:_^z)R
* @param i B" 0a5-pkr
*/ N*`qsv0
private void insertSort(int[] data, int start, int len) { H,3WdSL`K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K0usBA
} )4e8LO
} B6yTD7
} {6tj$&\)
} WbWEgd%8.
}WV}in0
堆排序： t+ vz=`
T!ww3d
package org.rut.util.algorithm.support; (UB?UJc
}|OwUdE!R9
import org.rut.util.algorithm.SortUtil; YW2h#PV6_
FPE%h=sw
/** Q3I^(Ll"L
* @author treeroot 2;w`W58
* @since 2006-2-2 `x]`<kS;
* @version 1.0 7C9_;81_Dt
*/ /os,s[w
public class HeapSort implements SortUtil.Sort{ }3}H}
aJ"m`5]=%
/* (non-Javadoc) *N&~Uq^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SaIY-PC
*/ |E9'ii&?B
public void sort(int[] data) { ^)UX#D3b
MaxHeap h=new MaxHeap(); 6Vj=SYK
h.init(data); @GWJq 3e
for(int i=0;i h.remove(); g.*DlD%%
System.arraycopy(h.queue,1,data,0,data.length); M5kw3Jy5
} CUN1.i<pk8
+P=IkbxAO
private static class MaxHeap{ .|e8v _2J
kW7$Gw]-
void init(int[] data){ 4:9N]1JCb
this.queue=new int[data.length+1]; mIZ6[ ?
for(int i=0;i queue[++size]=data; 1{AK=H')
fixUp(size); jx{wOb~oO)
} z*UgRLKZD
} )*XD"-9
ni85Ne$
private int size=0; IG Ax+3V
}a%1$>sj
private int[] queue; EO`eg]
?2%;VKN4
public int get() { )|=4H>?%
return queue[1]; ;pw9+zo^M
} P-/"sD
bXi!_'z$
public void remove() { P~M[i9 V
SortUtil.swap(queue,1,size--); 1,(WS F
fixDown(1); PX*}.L *x
} 1\a.o[g3e
file://fixdown W\2 ']7}e
private void fixDown(int k) { 7$*X
int j; :,ucJ|
while ((j = k << 1) <= size) { #g/m^8n?s
if (j < size %26amp;%26amp; queue[j] j++; \10KIAQ
if (queue[k]>queue[j]) file://不用交换 Z(XohWe2
break; 3 "iBcsLn
SortUtil.swap(queue,j,k); "AP$)xM-:
k = j; .I?~R:(Ig
} CTS1."kx1
} q BIekQT
private void fixUp(int k) { \n`/?\r.z
while (k > 1) { PthgxB^
int j = k >> 1; B! P/?
if (queue[j]>queue[k]) +e,c'.
break; l,*5*1lM
SortUtil.swap(queue,j,k); Wu"1M^a
k = j; as(/ >p
} >=4('
} J5(^VKj
{- &`@V
} /xSFW7d1
@QMy!y_K~m
} L~%7=]m
%!r.)Wx|2
SortUtil： { V)`6
+0?1"2
package org.rut.util.algorithm; D4\[D8pD
fDloL
import org.rut.util.algorithm.support.BubbleSort; 'b0r?A~c=
import org.rut.util.algorithm.support.HeapSort; H,c`=Ii3
import org.rut.util.algorithm.support.ImprovedMergeSort; Gr4v&Mz:
import org.rut.util.algorithm.support.ImprovedQuickSort; o*Xfgc
import org.rut.util.algorithm.support.InsertSort; 9Z21|5
import org.rut.util.algorithm.support.MergeSort; JA*+F1s
import org.rut.util.algorithm.support.QuickSort; 0'HQ=pP
import org.rut.util.algorithm.support.SelectionSort; ps;dbY*s6
import org.rut.util.algorithm.support.ShellSort; %E5b}E#
16>D?;2o(
/** `8S3Y
* @author treeroot 2]<.m]
* @since 2006-2-2 14"+ctq
* @version 1.0 7{]dh+)
*/ d@ >i=l [
public class SortUtil { p="0Y<2l
public final static int INSERT = 1; J?dLI_{<
public final static int BUBBLE = 2; !Sw=ns7
public final static int SELECTION = 3; OIJT~Z}
public final static int SHELL = 4; v$D U q+
public final static int QUICK = 5; x5CMP%}d
public final static int IMPROVED_QUICK = 6; ?%[~J
public final static int MERGE = 7; r ^\(M {
public final static int IMPROVED_MERGE = 8; "X^<g{]
public final static int HEAP = 9; fZj,Q#}D
S43JaSw)
public static void sort(int[] data) { O,9^R
sort(data, IMPROVED_QUICK); J&s$Wqf
} ^vPsp?
private static String[] name={ d]Y;rqjue
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MI'"Xzp{s
}; 4=ovm[
C[}UQod0
private static Sort[] impl=new Sort[]{ j!w{
new InsertSort(), Gx8!AmeX
new BubbleSort(), S2e3d
new SelectionSort(), _3:%b6&Pz
new ShellSort(), ]'"Sa<->
new QuickSort(), 4g"%?xN
new ImprovedQuickSort(), h=0a9vIXF
new MergeSort(), P%)r4+at
new ImprovedMergeSort(), 6Iqy"MQuq
new HeapSort() pr,,E[
}; )AxD|A
p20JUzy
public static String toString(int algorithm){ {x?qz~W
return name[algorithm-1]; p0WUF\"
} ccrWk*tr
) $_1U!z
public static void sort(int[] data, int algorithm) { & Wod
impl[algorithm-1].sort(data); \yu7,v
} PMpq>$6b7
0F@~[W|2
public static interface Sort { a_V\[V{R=
public void sort(int[] data); _FYA? d}
} Hf@4p'
e`s1z|h
public static void swap(int[] data, int i, int j) { '9Z`y_~)G
int temp = data; cZQ8[I
data = data[j]; W~0rSVD$<z
data[j] = temp; 5h&sdzfG
} aZ4?!JW.
} kqm(D#