[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; Er%nSH^"
} w 5,-+&;
int i1=l; [aIQ/&Y
int i2=mid+1; |{Oe&j3|
for(int cur=l;cur<=r;cur++){ -()CgtSR
if(i1==mid+1) RCsd
data[cur]=temp[i2++]; d^,u"Z9P
else if(i2>r) )K%AbKn
data[cur]=temp[i1++]; `~gyq>Ik2
else if(temp[i1] data[cur]=temp[i1++]; o8Tt|Lxb$8
else L-q.Q
data[cur]=temp[i2++]; &t`l,]PQ=6
} 38rC; 6
} g#:?Ay-m
;Q\Duj
} P0|V1,)
hg |DpP
改进后的归并排序: rry 33
`vUilh ^c
package org.rut.util.algorithm.support; )$Mgp*?
=%p0rz|b
import org.rut.util.algorithm.SortUtil; p'!cGJL
Ij4oH
/** #5=Yg5
* @author treeroot QYDSE
* @since 2006-2-2 YiB^m
* @version 1.0 N<9CV!_
*/ E]i3E[T
public class ImprovedMergeSort implements SortUtil.Sort { A-qdTJP
)}tI8
private static final int THRESHOLD = 10; R>yoMk/u
[a`89'"z
/* 3Oy?_a$
* (non-Javadoc) X`ee}C.D_
* }f/ 1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H)ud?vB6
*/ I ze+](
public void sort(int[] data) { b:SjJA,HM
int[] temp=new int[data.length]; GU([A@;
mergeSort(data,temp,0,data.length-1); ~ep-XO
} TY"8.vd
k+t?EZ6L
private void mergeSort(int[] data, int[] temp, int l, int r) { tZB"(\
int i, j, k; I<Wp,E9G#
int mid = (l + r) / 2; 8KiG(6*Q
if (l == r) u$O` \=
return; C8W#$a
if ((mid - l) >= THRESHOLD) F0(P2j
mergeSort(data, temp, l, mid); MAb*4e#
else m:SG1m_6
insertSort(data, l, mid - l + 1); P{-j^'y
if ((r - mid) > THRESHOLD) f#f<Ii
mergeSort(data, temp, mid + 1, r); Pqu]?X
else *t=8^q(K[
insertSort(data, mid + 1, r - mid); %Ya%R@b}
e ?sMOBPlv
for (i = l; i <= mid; i++) { K2|2Ks_CS
temp = data; 3Xcjr2]~
} Td(eNe_4T
for (j = 1; j <= r - mid; j++) { !?)ky `S3
temp[r - j + 1] = data[j + mid]; ]ie38tX$
} +-2o b90_m
int a = temp[l]; Mu: y9o95
int b = temp[r]; xP/?E
for (i = l, j = r, k = l; k <= r; k++) { {G.W?
if (a < b) { 8z1#Q#5
data[k] = temp[i++]; M$YU_RPl+
a = temp; O2{~Q{p
} else { K-,4eq!
data[k] = temp[j--]; Aqy y\G;
b = temp[j]; p+7G
} LuW>8K\
} nSy{{d
} NVnId p
|#(KP
/** {=I:K|&
* @param data $;iMo/
* @param l amTeTo]Tg
* @param i 2JdzeJb
*/ `^v=*&
private void insertSort(int[] data, int start, int len) { S4 j5-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &u+l`F^Z
} =y^`yv 3
} 8NnGN(a*D
} *c<6 Er>s
} jlxY|;gZ-0
dvAG}<
堆排序： g?.y7!m
5bB\i79$
package org.rut.util.algorithm.support; *O|_)G
#Z. QMWq
import org.rut.util.algorithm.SortUtil; s5/u>d
gU&y5s~
/** "hmLe(jo}
* @author treeroot CM%Rz-c
* @since 2006-2-2 9r.h^
* @version 1.0 Tbp;xv_qo
*/ >^6|^rc
public class HeapSort implements SortUtil.Sort{ ["fUSQ
gc\/A\F<
/* (non-Javadoc) DaS~bweMw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -aq3Lqi
*/ "4IrW6B$9
public void sort(int[] data) { F;bkV}^
MaxHeap h=new MaxHeap(); %9 3R/bx
h.init(data); "XQ3mi`y
for(int i=0;i h.remove(); 9a2[_Wy
System.arraycopy(h.queue,1,data,0,data.length); Sse%~:FL
} htT9Hrx
G} f9:G
private static class MaxHeap{ Ze!/b|`xI
%[, R Q">v
void init(int[] data){ |<Y~\|
this.queue=new int[data.length+1]; CcTdLq
for(int i=0;i queue[++size]=data; w`DcnQK'
fixUp(size); #<~oR5ddlb
} ~470LgpO1
} #Iu"qu
ihJ!]#Fbm
private int size=0; QOX'ZAB`
w&@zJ[
private int[] queue; 25f[s.pv8
R4X9g\KpAt
public int get() { #zv&h`gY
return queue[1]; 2D(sA
} l{*m-u5&;
k`#E#1niN
public void remove() { sSf;j,7V
SortUtil.swap(queue,1,size--); k')H5h+Q=
fixDown(1); nuDu
} u -)ED
file://fixdown _Ss}dU9
private void fixDown(int k) { k`o8(zPb
int j; TMD\=8Na
while ((j = k << 1) <= size) { /0cm7[a?
if (j < size %26amp;%26amp; queue[j] j++; fWC(L s
if (queue[k]>queue[j]) file://不用交换 ZeY|JH1
break; rizjH+
SortUtil.swap(queue,j,k); 2}7_Y6RS*
k = j; w:9`R<L
} ^62z\Y
} ]&;In,z
private void fixUp(int k) { }9^'etD
while (k > 1) { Ie K+
int j = k >> 1; |Eh2#K0x4G
if (queue[j]>queue[k]) (f^/KB=
break; JhjH_)
SortUtil.swap(queue,j,k); 1ni72iz\
k = j; s FJ:09L|
} m,"-/)
} 2D:,(
.%dGSDru
} ?(U;T!n
o=#ym4hJ%
} p^}`^>OL
#>HY+ ;
SortUtil： k q]E@tE*3
WVsj
package org.rut.util.algorithm; XZ{rKf2
*zN~x(0{E
import org.rut.util.algorithm.support.BubbleSort; T`pDjT
import org.rut.util.algorithm.support.HeapSort; l.]wBH#RS
import org.rut.util.algorithm.support.ImprovedMergeSort; ~QlF(@ue
import org.rut.util.algorithm.support.ImprovedQuickSort; Qd\='*:!
import org.rut.util.algorithm.support.InsertSort; CS(XN>N
import org.rut.util.algorithm.support.MergeSort; %~k>$(u6
import org.rut.util.algorithm.support.QuickSort; j!NXNuy:
import org.rut.util.algorithm.support.SelectionSort; { `Z~T&}~T
import org.rut.util.algorithm.support.ShellSort; 6$:Q]zR#'H
0:n"A,-p
/** 63%V_B|
* @author treeroot TBrwir
* @since 2006-2-2 ,?Ie!r$6
* @version 1.0 %'i_iF8.
*/ XN6$TNsD$
public class SortUtil { '_V9FWDZ
public final static int INSERT = 1; i].E1},%
public final static int BUBBLE = 2; >q&5Z
public final static int SELECTION = 3; 2}XRqa.|
public final static int SHELL = 4; AG}j'
public final static int QUICK = 5; h~]e~u V
public final static int IMPROVED_QUICK = 6; E:M,nSc)53
public final static int MERGE = 7; ykJ+LS{+
public final static int IMPROVED_MERGE = 8; M;b3- i
public final static int HEAP = 9; 0G-obHe0
aem gGw<
public static void sort(int[] data) { szhSI
sort(data, IMPROVED_QUICK); 64#Ri!RR}
} DBsoa0w
private static String[] name={ A?lR[`'u\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G1w$lc
}; kppi>!6
3u[8;1}7Q
private static Sort[] impl=new Sort[]{ 0>BI[x@
new InsertSort(), vV$t`PEY
new BubbleSort(), eR>8V8@
new SelectionSort(), HfhI9f_x
new ShellSort(), .%7Le|Fb"
new QuickSort(), Yq51+\d
new ImprovedQuickSort(), T?f{.a)
new MergeSort(), Xe_djy'8
new ImprovedMergeSort(), 6,jCO@!
new HeapSort() l,]%D
}; $z*"@
;92xSe"Ww
public static String toString(int algorithm){ Ssz;d&93
return name[algorithm-1]; hKN ;tq,
} S'qT+pP
[^ r8P:Ad
public static void sort(int[] data, int algorithm) { w{dRf!b69
impl[algorithm-1].sort(data); r,.j^a
} XD8I.q
SPdEO3
public static interface Sort { 5yK#;!:h
public void sort(int[] data); 'Ca;gi !U
} Rh)XYCM
R31Z(vY
public static void swap(int[] data, int i, int j) { 5EVypw?]x
int temp = data; W!\%v"
data = data[j]; \WTKw x
data[j] = temp; ]g;+7
} k Qr
} psmDGSm,&