[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; ,ce$y4%(
} 7ws[Rp8
int i1=l; B/EGaYH
int i2=mid+1; {RH)&k&%
for(int cur=l;cur<=r;cur++){ ;sSRv9Xb
if(i1==mid+1) \D! I"mr
data[cur]=temp[i2++]; g+k yvI7o
else if(i2>r) Ys%d
data[cur]=temp[i1++]; x1`Jlzrp,
else if(temp[i1] data[cur]=temp[i1++]; Wc/B_F?2
else C:}"?tri
data[cur]=temp[i2++]; l'\m'Ioh
} $I3}%'`+
} }Do$oyAV$G
V#-8[G6Ra
} 4L2TsuLw
lHgmljn5u
改进后的归并排序: L3C'q
sGJZG
package org.rut.util.algorithm.support; )9rJ]D^B
DM !B@
import org.rut.util.algorithm.SortUtil; Y#Pg*C8>8
W'C~{}c=
/** VSm{]Z!x
* @author treeroot GplEad $
* @since 2006-2-2 14Jkr)N
* @version 1.0 w5Yt mnP
*/ `HM?Fc58
public class ImprovedMergeSort implements SortUtil.Sort { -sk!XWW+
$,7Yo nc
private static final int THRESHOLD = 10; /.@"wAw:
TC._kAm
/* @yn1#E,
* (non-Javadoc) ;U<rFs40
* 5SHZRF(. 2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5q.)K f+
*/ E"Y[k8-:2/
public void sort(int[] data) { Ivc/g,
int[] temp=new int[data.length]; sMWNzt
mergeSort(data,temp,0,data.length-1); )L7h:%h#
} h!]=)7x;
i}LVBx"K(
private void mergeSort(int[] data, int[] temp, int l, int r) { c0:`+>p2
int i, j, k; m3Rss~l
int mid = (l + r) / 2; D3;#:
if (l == r) DqBiBH[%h
return; mp>Ne6\Tu
if ((mid - l) >= THRESHOLD) ,A!0:+
mergeSort(data, temp, l, mid); 8}!WJ2[R
else 'di(5
insertSort(data, l, mid - l + 1); /.[78:G\,
if ((r - mid) > THRESHOLD) hW-?j&yJ?
mergeSort(data, temp, mid + 1, r); e:RgCDWL
else XRWy#Pj
insertSort(data, mid + 1, r - mid); agPTY{;
10e~Yc
for (i = l; i <= mid; i++) { 1ihdH1rg[
temp = data; [-JU(:Rh
} zM|Y X<
for (j = 1; j <= r - mid; j++) { C.9l${QU
temp[r - j + 1] = data[j + mid]; ABnJ{$=n#
} %pImCpMR
int a = temp[l]; 6n$g73u<=3
int b = temp[r]; Z {*<Gx
for (i = l, j = r, k = l; k <= r; k++) { ?hnxc0~P
if (a < b) { V82N8-l
data[k] = temp[i++]; h2m@Q={
a = temp; xIa8Ac
} else { Z(a,$__
data[k] = temp[j--]; 3g5 n>8-
b = temp[j]; /X97dF)zt
} 59M\uVWR
} a}/A]mu
} @ZGD'+zd?
uBfSS\SX|
/** mvt%3zCB!
* @param data v,A8Mk2s#
* @param l PFPZ]XI%F
* @param i J`d;I#R%c
*/ ._US8
private void insertSort(int[] data, int start, int len) { AqucP@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,ftKRq
} qO}Q4a+
} 9._owKj
} J'Y;j^
} !juh}q&}|
) i=.x+Q
堆排序： f#b;s<G
])NQzgS
package org.rut.util.algorithm.support; aLt2fB1)
4 oZm0
import org.rut.util.algorithm.SortUtil; L/2,r*LNx$
Ipyr+7/zJ
/** m>ApN@n
* @author treeroot gX!-s*{E
* @since 2006-2-2 \d}>@@U&
* @version 1.0 .h[yw$z6
*/ LF\HmKM,
public class HeapSort implements SortUtil.Sort{ TnQ"c)ta
|kh7F0';"
/* (non-Javadoc) nv/'C=+L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9B?-&t
*/ 4Bz:n
public void sort(int[] data) { ;30SnR/
MaxHeap h=new MaxHeap(); nb_$g@03
h.init(data); 6#(==}Sm+
for(int i=0;i h.remove(); V(3=j)#
System.arraycopy(h.queue,1,data,0,data.length); 'CA{>\F$F+
} 6-J%Z%yT #
6g&Ev'
private static class MaxHeap{ 'Uu!K!
)4e?-?bK!
void init(int[] data){ AS'%Md&I
this.queue=new int[data.length+1]; Ws*UhJY<GS
for(int i=0;i queue[++size]=data; =a^}]k}
fixUp(size); :.aMhyh#*
} \2!1fN
} ;Bwg'ThT
6tF_u D
private int size=0; m< Y I}
Z]qbLxJV
private int[] queue; 5)iOG#8qJ
$*hqF1Q
public int get() { z1S p'h$
return queue[1]; 6&`hf >
} hU6oWm
iR]K!j2
public void remove() { dpSNh1
SortUtil.swap(queue,1,size--); =bJ7!&
fixDown(1); k{ ~0BK
} TP{2q51yM
file://fixdown B"?ivxM:U
private void fixDown(int k) { #.j}:
int j; \45F;f_r6
while ((j = k << 1) <= size) { bYAtUEv
if (j < size %26amp;%26amp; queue[j] j++; .W s\%S
if (queue[k]>queue[j]) file://不用交换 w;;9YFBdM
break; ,=V9?
SortUtil.swap(queue,j,k); <NXJ&xs-+
k = j; {ep(_1
} Oe ~g[I;
} xtO#reL"q?
private void fixUp(int k) { yc+pNC)ue_
while (k > 1) { ~sT1J|
int j = k >> 1; {2F@OfuCF
if (queue[j]>queue[k]) J"~!jrzBh(
break; YpI|=mv
SortUtil.swap(queue,j,k); 6|n3e,&A2
k = j; o2~P vef
} Dl@Jj?zc
} `br$kB
U*4r<y9R
} sm"s2Ci=}
,0a\Ka{^
} *}) W>
7!Qu+R
SortUtil： Z0%:j\W4c
4i7+'F
package org.rut.util.algorithm; 49.B!DqQW&
%X|u({(zb
import org.rut.util.algorithm.support.BubbleSort; 1]69S(
import org.rut.util.algorithm.support.HeapSort; Kf1NMin7
import org.rut.util.algorithm.support.ImprovedMergeSort; +\]Gu(z<
import org.rut.util.algorithm.support.ImprovedQuickSort; )M><09
import org.rut.util.algorithm.support.InsertSort; DS=$* Trk
import org.rut.util.algorithm.support.MergeSort; `vZX"+BAh
import org.rut.util.algorithm.support.QuickSort; Y'C1L4d
import org.rut.util.algorithm.support.SelectionSort; =M=v; ,I-
import org.rut.util.algorithm.support.ShellSort; 8W Etm}
10_#Z~aU
/** 7-gT:
* @author treeroot s }Ql9
* @since 2006-2-2 y*%uGG5
* @version 1.0 T~L&c
*/ e|N~tUVrrN
public class SortUtil { >L')0<!&
public final static int INSERT = 1; +pRNrg?k
public final static int BUBBLE = 2; EF6h>"']/
public final static int SELECTION = 3; Cxeam"-HTt
public final static int SHELL = 4; H*e+ 2
public final static int QUICK = 5; +z4E:v
public final static int IMPROVED_QUICK = 6; &`oybm-p(
public final static int MERGE = 7; TV=K3F5)M
public final static int IMPROVED_MERGE = 8; .cm2L,1h
public final static int HEAP = 9; "VDMO^
(x fN=Te,-
public static void sort(int[] data) { ``%yVVg}
sort(data, IMPROVED_QUICK); -9::M}^2
} |az2vD6P
private static String[] name={ Y_K W9T_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NSM7n= *nh
}; @VPmr}p:{
u*/+cT
private static Sort[] impl=new Sort[]{ .5uqc.i"f
new InsertSort(), =*1NVi $n
new BubbleSort(), T*nP-b
new SelectionSort(), Z?xRSi2~7
new ShellSort(), T<-_#}.Hn
new QuickSort(), Ss%1{s~ok
new ImprovedQuickSort(), ~Up{zRD"B
new MergeSort(), 4(p`xdr}K
new ImprovedMergeSort(), s VHk;:e>x
new HeapSort() (zh[1[a
}; tva=DS
NBHpM}1xtU
public static String toString(int algorithm){ C~R ?iZ.&U
return name[algorithm-1]; f}J(nz>Sh
} ]f0OmUHR5i
1 +[sM
public static void sort(int[] data, int algorithm) { T7%!JBg@
impl[algorithm-1].sort(data); L$BV`JWPw
} J\P6
*MB>,HU
public static interface Sort { g(Q1d-L4e
public void sort(int[] data); z_N";Rn
} Q;J( 5;
zCuB+r=C
public static void swap(int[] data, int i, int j) { `CI_zc=jx
int temp = data; 2;u i'B
data = data[j]; aydNSgu
data[j] = temp; ^H&U_
} > K?OsvX
} [}]yJ+)