[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; k!/_/^{
} 1Bk*G>CX9(
int i1=l; @zynqh
int i2=mid+1; a\69,%!:
for(int cur=l;cur<=r;cur++){ S"^KJUUc
if(i1==mid+1) @B'8SLoP
data[cur]=temp[i2++]; bsi q9$F
else if(i2>r) @'r`(o3z!Z
data[cur]=temp[i1++]; Ui|a}`c
else if(temp[i1] data[cur]=temp[i1++]; zt)PZff/YQ
else 3y=<w|4F
data[cur]=temp[i2++]; xbrmPGpW$
} 9LEilmPs
} id tQXwa
te*Y]-&I|/
} <,pLW~2-"
C6'*/wq
改进后的归并排序: 8gtCY~m
3.<6;?
package org.rut.util.algorithm.support; G#n^@kc*,
Sd\IGy{a
import org.rut.util.algorithm.SortUtil; K-EI?6`xM
@yn^6cE
/** 4 ?@uF[
* @author treeroot aT1CpY=T|.
* @since 2006-2-2 ah/6;,T
* @version 1.0 Hx2j=Q_dw
*/ vYSetAdv
public class ImprovedMergeSort implements SortUtil.Sort { d0A\#H_&
\ ~LU 'j
private static final int THRESHOLD = 10; Iq0 #A5U%
9{%g-u\
/* -hVv
* (non-Javadoc) 'hlB;z|T
* c_G-R+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jh&~/ntmm_
*/ L_~I~
public void sort(int[] data) { )YnI!v2T
int[] temp=new int[data.length]; @x=BJuUuX
mergeSort(data,temp,0,data.length-1); o?va#/fk
} CS;W)F
Y!a+#N!
private void mergeSort(int[] data, int[] temp, int l, int r) { a0?iR5\
int i, j, k; t$y&=v
int mid = (l + r) / 2; q3x;_y^
if (l == r) Q}Ze-JIL$
return; XJJ[F|k~
if ((mid - l) >= THRESHOLD) V"7<[u]K|
mergeSort(data, temp, l, mid); < R|)5/9
else 7zg)h
insertSort(data, l, mid - l + 1); urrO1
if ((r - mid) > THRESHOLD) u_4:#~b
mergeSort(data, temp, mid + 1, r); ?b@q5Y
else *H%0Gsk
insertSort(data, mid + 1, r - mid); :n+y/6*
B15O,sL&W
for (i = l; i <= mid; i++) { @7Rt4}g
temp = data; ?79SPp)oo
} !qTpQ5Dm
for (j = 1; j <= r - mid; j++) { n~,]KdU]
temp[r - j + 1] = data[j + mid]; 8sR
} UU.mdSL
int a = temp[l]; ~"JE![XR
int b = temp[r]; Uin k
for (i = l, j = r, k = l; k <= r; k++) { ?v"K1C1.
if (a < b) { +(z_"[l"
data[k] = temp[i++]; wsf Hd<Z_
a = temp; . QQ?w
} else { zL)1^[%O9
data[k] = temp[j--]; lTV@b&
b = temp[j]; o5=)~D{/G3
} C,|nmlDN
} yhSk"e'G
} -[zdX}x.:
c YM CfP
/** 5U-p'c9IC
* @param data >J^7}J
* @param l *`+<x
* @param i -YzQ2#K
*/ l$k]O
private void insertSort(int[] data, int start, int len) { vLv|SqD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yN9$gfJC^
} <OR.q
} {k_ PMl0G
} o%V @D'w
} [!J @a
Q? <-`7
堆排序： ?qf:_G
=E [4H
package org.rut.util.algorithm.support; aPD?Bh>JU
$f<eq7rRe
import org.rut.util.algorithm.SortUtil; a1 46kq
'A@qg^e:`
/** <[Tq7cO0
* @author treeroot t4f (Y,v
* @since 2006-2-2 zB#_:(1qK
* @version 1.0 LyuSZa]
*/ MekT?KPQ{L
public class HeapSort implements SortUtil.Sort{ -TzI>Fz
,]~u:Y}
/* (non-Javadoc) $i,6B9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DO7-=74=
*/ /*u#Ba<<
public void sort(int[] data) { J6)efX)j-p
MaxHeap h=new MaxHeap(); <X:Ud&\
h.init(data); E fP>O
for(int i=0;i h.remove(); 9GMH*=3[=
System.arraycopy(h.queue,1,data,0,data.length); hH<6E
} Q3'fz 9v
0hrCG3k.91
private static class MaxHeap{ 0V<Aub[${
x r-;,W
void init(int[] data){ Z"6 2#VM
this.queue=new int[data.length+1]; Q^$ghZ6V
for(int i=0;i queue[++size]=data; d{QMST2&
fixUp(size); &_"ORqn&
} SX1X<9
} o2;(VSKhS
X}zX`]:I'
private int size=0; Pv< QjY
M0cd-Dn
private int[] queue; TA Ftcs:
~gu=x&{
public int get() { I*^5'N'
return queue[1]; 44\!PYf7
} 6N9 c<JC
H"#)&a7
public void remove() { i/NDWVFD
SortUtil.swap(queue,1,size--); S:/{
fixDown(1); 7n\ThfH{
} \:]DFZ=!
file://fixdown <_"B}c/2$
private void fixDown(int k) { 8<YX7e
int j; #$LH2?)
while ((j = k << 1) <= size) { rlR !&
if (j < size %26amp;%26amp; queue[j] j++; xLA~1ZSVJw
if (queue[k]>queue[j]) file://不用交换 nYOY"'z
break; +J"' 'cZ
SortUtil.swap(queue,j,k); n4^~gT%b5]
k = j; L<bYRGz
} J"diFz+20
} mfZ)^X
private void fixUp(int k) { ]kRI}Om2
while (k > 1) { j*tk(o}qG
int j = k >> 1; bsB},pc
if (queue[j]>queue[k]) _~tm7o+js
break; FXS^^p P
SortUtil.swap(queue,j,k); cb+l"FI7
k = j; ^:m^E0(H
} p={Jf}v
} `-4'/~G
[-4KY4R
} :%N*{uy
wz|DT3"Xs
} z(+&wa
T_eJ}(p
SortUtil： VLiIO"u;
9*4 .
package org.rut.util.algorithm; *dN N<
q^5yk=2fq
import org.rut.util.algorithm.support.BubbleSort; :d.1;st
import org.rut.util.algorithm.support.HeapSort; <O.Kqk* nq
import org.rut.util.algorithm.support.ImprovedMergeSort; gdl| ^*tc
import org.rut.util.algorithm.support.ImprovedQuickSort; >L8?=>>?\
import org.rut.util.algorithm.support.InsertSort; os[ZIHph
import org.rut.util.algorithm.support.MergeSort; L~IE,4
import org.rut.util.algorithm.support.QuickSort; RoX &+~
import org.rut.util.algorithm.support.SelectionSort; RL6Vkd?
import org.rut.util.algorithm.support.ShellSort; 4AQ[igTDP
auRY|j
/** /-Wuq`P/ T
* @author treeroot "lTZ|k^
* @since 2006-2-2 'qjX$]H
* @version 1.0 'fIHUw|
*/ $`pd|K`
public class SortUtil { {J2#eiF
public final static int INSERT = 1; Zb."*zL
public final static int BUBBLE = 2; U2bzUxK
public final static int SELECTION = 3; S`=n&'
public final static int SHELL = 4; hd5$yU5JQ
public final static int QUICK = 5; IhE9snJ[
public final static int IMPROVED_QUICK = 6; (VyA6a8
public final static int MERGE = 7; T'.[F
public final static int IMPROVED_MERGE = 8; rIVvO
public final static int HEAP = 9; )Ob]T{GY
FqwIJ|ct
public static void sort(int[] data) { vs+QbI6>-
sort(data, IMPROVED_QUICK); -j&Vtr
} .Rvf/-e
private static String[] name={ OqBC/p B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p;0 PxL=
}; &iNS?1a%f=
]KWK}Zyi
private static Sort[] impl=new Sort[]{ /Pk:4,
new InsertSort(), O=aw^|oj]
new BubbleSort(), +i.u< T
new SelectionSort(), r!kLV)_
new ShellSort(), MWs~#ReZ
new QuickSort(), pA.._8(t
new ImprovedQuickSort(), qp>N^)>
new MergeSort(), 4d`+CD C
new ImprovedMergeSort(), +"8}R~`!
new HeapSort() yAG+] r
}; paWxanSt
TGf;_)El
public static String toString(int algorithm){ XFQNr`
return name[algorithm-1]; m;o4Fu
} ($62o&I
*g_w I%l
public static void sort(int[] data, int algorithm) { h=6xZuA\
impl[algorithm-1].sort(data); F+ukAT
} Q_]~0PoH
Ux}W&K/?'
public static interface Sort { |gv{z"
public void sort(int[] data); Efx=T$%^&
} 90fs:.
WL U}
public static void swap(int[] data, int i, int j) { PO o%^'(
int temp = data; rP'AJDuq
data = data[j]; O9^T3~x[V
data[j] = temp; "Zcu[2,
} 1`JB)9P
} u1^\MVO8