[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; vhot-rBN
} :3$-Qv X
int i1=l; +ZU@MOni
int i2=mid+1; \qB:z7I2
for(int cur=l;cur<=r;cur++){ Y*q_>kps"
if(i1==mid+1) HMrl!;:
data[cur]=temp[i2++]; >UDb:N[
else if(i2>r) Wi3St`$
data[cur]=temp[i1++]; +(qs{07A$
else if(temp[i1] data[cur]=temp[i1++]; Y[WL}:"93
else UYW{AG2C
data[cur]=temp[i2++]; [yf&]0
} g?=|kp
} %}x$YDO
"2a&G3}t"
} AKkr )VgY
e~iPN.'1
改进后的归并排序: PShluhY
QXg9ah~
package org.rut.util.algorithm.support; s!Y`1h{
)/_T`cN
import org.rut.util.algorithm.SortUtil; whdoG{/
U9:w^t[Pp
/** r"aJ&~8::W
* @author treeroot Z?_t3
* @since 2006-2-2 Lkl+f~m
* @version 1.0 }8,[B50
*/ |E=8
public class ImprovedMergeSort implements SortUtil.Sort { TU(w>v
LA%t'n h
private static final int THRESHOLD = 10; i<uWLhgh1$
SB}0u=5
/* rbD}fUg
* (non-Javadoc) +M %zOX/
* w,qYT-R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k6mC_
*/ Wo[*P\8
public void sort(int[] data) { xHo iu$i6
int[] temp=new int[data.length]; s`E^1jC
mergeSort(data,temp,0,data.length-1); ;4] sP^+
} 1p|}=R
JZM:R
private void mergeSort(int[] data, int[] temp, int l, int r) { T~"T%r
int i, j, k; +#IsRiH%>
int mid = (l + r) / 2; @M!WosRk
if (l == r) ~DJ>)pp
return; Dd:;8Xo
if ((mid - l) >= THRESHOLD) )of?!>'S[
mergeSort(data, temp, l, mid); gk.c"$2
else Sgy_?Y
insertSort(data, l, mid - l + 1); asQXl#4r
if ((r - mid) > THRESHOLD) L dyTB@
mergeSort(data, temp, mid + 1, r); 0-!K@#$>=
else alB[/.1
insertSort(data, mid + 1, r - mid); pf'-(W+
XKEd~2h<y
for (i = l; i <= mid; i++) { FBCi,_ \4
temp = data; 4?s ~S. %
} d l<7jM?
for (j = 1; j <= r - mid; j++) { ?-g/hXx;
temp[r - j + 1] = data[j + mid]; tnCGa%M
} 9Nkr=/I"P
int a = temp[l]; I8RPW:B;B
int b = temp[r]; !L)~*!+Gf
for (i = l, j = r, k = l; k <= r; k++) { E"|LA[o
if (a < b) { /y.+N`_
data[k] = temp[i++]; RIDzNdM>U
a = temp; }#3'72
} else { <E`Ygac
data[k] = temp[j--]; ,( ?q
b = temp[j]; qek[p_7
} 4Sq[I
} &1:_+
} $&!i3#FF
~H)s>6>#v
/** \ $PB~-Z
* @param data WHM|kt
* @param l N7b+GqYpF>
* @param i 6zGM[2
*/ K Qz.g3,
private void insertSort(int[] data, int start, int len) { 9Un3La8PX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 86BY032H
} DnZkZ;E/
} s$,gM,|cK
} #J,?oe=<4
} !&n'1gJ)kd
oJLpFL
堆排序： wM"PJG
/4}B}"`Sl=
package org.rut.util.algorithm.support; R2 I 7d'|v
_7#9nJ3|
import org.rut.util.algorithm.SortUtil; 1JFCYJy
/2n-q_
/** U^n71m>]%T
* @author treeroot XIAHUT5~J
* @since 2006-2-2 _8f? H#&
* @version 1.0 VT;Vm3\
*/ *x;&fyR
public class HeapSort implements SortUtil.Sort{ ?Bdhn{_
*&d>Vk."]
/* (non-Javadoc) mYy{G s7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b3Uw"{p
*/ fXV+aZ
public void sort(int[] data) { xxsax/h
MaxHeap h=new MaxHeap(); 7l%]/`Y-
h.init(data); R.FC3<TTv
for(int i=0;i h.remove(); >+P5Zm(_
System.arraycopy(h.queue,1,data,0,data.length); gNsas:iGM
} IsC`r7
3Dd"qON!
private static class MaxHeap{ kTjx.
@&AUbxoj
void init(int[] data){ ~ryB*eZH
this.queue=new int[data.length+1]; 8K]5fkC|
for(int i=0;i queue[++size]=data; WB7pdSZ
fixUp(size); 'nrXRDb
} gB;5&;T:
} #%;QcDXRe
5 +Ei!E89
private int size=0; eYN=?
/*zngp@
private int[] queue; )nK-39,G
I:ag}L8`
public int get() { EU@ BNja
return queue[1]; RWe$ZZSz!
} Q||vU
N5yt'.d
public void remove() { Cw*:`
SortUtil.swap(queue,1,size--); W7_j;7'
fixDown(1); Em%0C@C
} ZCT\4Llv#
file://fixdown BkP'b{z|
private void fixDown(int k) { nD8 Qeem@
int j; iB]xYfQ&@V
while ((j = k << 1) <= size) { lhx"<kR4
if (j < size %26amp;%26amp; queue[j] j++; ;77#$H8)
if (queue[k]>queue[j]) file://不用交换 -&Cb^$.-x
break; U/W<Sa\`
SortUtil.swap(queue,j,k); Hd/|f;
k = j; YT*_ vmJV
} [eb?Fd~WB]
} {Tps3{|wt
private void fixUp(int k) { J|uxn<E<>
while (k > 1) { 5a`f% h%
int j = k >> 1; hnk,U:7}
if (queue[j]>queue[k]) LXZ0up-B-
break; :"vW;$1 }
SortUtil.swap(queue,j,k); Cggu#//Z}Q
k = j; /e2CB"c
} ^n5rUwS>
} nE2w?
O;34~k
} fAMk<?
#{m~=1%;Ya
} 8l?mNapy
_+OnH!G0
SortUtil： 8(6(,WwP}
<WHu</
package org.rut.util.algorithm; A>?_\<Gp
j5rB+
import org.rut.util.algorithm.support.BubbleSort; am'11a@*
import org.rut.util.algorithm.support.HeapSort; TbUouoc
import org.rut.util.algorithm.support.ImprovedMergeSort; Qb.Ve7c
import org.rut.util.algorithm.support.ImprovedQuickSort; H n^)Xw
import org.rut.util.algorithm.support.InsertSort; *&=sL
import org.rut.util.algorithm.support.MergeSort; u . xUM
import org.rut.util.algorithm.support.QuickSort; k Y}r^NaQA
import org.rut.util.algorithm.support.SelectionSort; W<QMUu
import org.rut.util.algorithm.support.ShellSort; q)m0n237P
RjcU0$Hi
/** )V6Bzn}9
* @author treeroot fLtN-w6t
* @since 2006-2-2 vj_[LFE
* @version 1.0 sU|\? pJ
*/ M_OvIU(E
public class SortUtil { cbton<r~
public final static int INSERT = 1; ?ufX3yia
public final static int BUBBLE = 2; i40'U?eG~6
public final static int SELECTION = 3; +nz6+{li\
public final static int SHELL = 4; 61[ 8I},V
public final static int QUICK = 5; +.EP_2f9
public final static int IMPROVED_QUICK = 6; Az`c? W%
public final static int MERGE = 7; K1gZ>FEY|N
public final static int IMPROVED_MERGE = 8; M2$.Yom[
public final static int HEAP = 9; \~(scz$
Asy&X
public static void sort(int[] data) { "CX@a"
sort(data, IMPROVED_QUICK); uZg[PS=@!X
} ~l^Q~W-+
private static String[] name={ mB.j?@Y%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MXsCm(
}; mBrH`!
j_\?ampF
private static Sort[] impl=new Sort[]{ MR?5p8S#g
new InsertSort(), or8`.hEHI
new BubbleSort(), RCL}bE
new SelectionSort(), |h7 d#V>
new ShellSort(), Sb/`a~q^
new QuickSort(), xa=Lu?t%<
new ImprovedQuickSort(), a7?)x])e
new MergeSort(), x @a3STKT
new ImprovedMergeSort(), ]SO-NR
new HeapSort() G0izZWc
}; ?_@_NV MY
BM vGw
public static String toString(int algorithm){ ^?~WIS
return name[algorithm-1]; xnR;#Yc
} y37c&XYq
|*T`3@R;3
public static void sort(int[] data, int algorithm) { ;UAi>//#
impl[algorithm-1].sort(data); Qvx[F:#Tk
} P4VMGP
)Z"
public static interface Sort { zUIh^hbFf
public void sort(int[] data); [Zpx :r}
} 5Y3L
l!d |luqbA
public static void swap(int[] data, int i, int j) { &>xd6-
int temp = data; (v)/h>vS
data = data[j]; DD?zbN0X
data[j] = temp; }g9g]\.!a
} m-v0=+~&
} v|7=IJ