[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;z7/[%
} Uu(SR/R}
int i1=l; V<uR>TD(
int i2=mid+1; z]?N+NHOA
for(int cur=l;cur<=r;cur++){ l6 H|PR{
if(i1==mid+1) M`i\VG
data[cur]=temp[i2++]; {I#]@,
else if(i2>r) mFaZio0GK
data[cur]=temp[i1++]; D(RTVef
else if(temp[i1] data[cur]=temp[i1++]; ^y1j.M@q
else #(JNn'fzq
data[cur]=temp[i2++]; 4k_vdz
} .QJ5sgmh
} YLv'43PL
es&vMY
} |O9O )o
}h!f eP
改进后的归并排序: Midy"
/} WDU
package org.rut.util.algorithm.support; 7Vo$(kj
kB|B
import org.rut.util.algorithm.SortUtil; $m1z-i;/
=mpVYA
/** v`zJb00DT
* @author treeroot gSUcx9f]
* @since 2006-2-2 MET' (m
* @version 1.0 $79=lEn,
*/ "4+WZR]
public class ImprovedMergeSort implements SortUtil.Sort { 0rDh}<upjk
i/ )am9
private static final int THRESHOLD = 10; Tewb?:
]d0tE?9
/* Sf7\;^
* (non-Javadoc) a\E:sPM'>
* |>27B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z}l3l`h!
*/ &6YIn|}
public void sort(int[] data) { \uC15s<
int[] temp=new int[data.length]; u!X|A`o5i
mergeSort(data,temp,0,data.length-1); '~&X wZ&
} DSk/q-'u
M .JoHH
private void mergeSort(int[] data, int[] temp, int l, int r) { sy"^?th}b
int i, j, k; u\{ g(li-I
int mid = (l + r) / 2; =L:4i\4
if (l == r) 2h1C9n%j9
return; 87P>IO
if ((mid - l) >= THRESHOLD) U\;6mK)M^J
mergeSort(data, temp, l, mid); ()+<)hg}2
else ^,8)iV0j_
insertSort(data, l, mid - l + 1); J)~L
if ((r - mid) > THRESHOLD) bMMh|F
mergeSort(data, temp, mid + 1, r); EzV96+
else X{'q24\F
insertSort(data, mid + 1, r - mid); pd7NF-KD
- 'W++tH=
for (i = l; i <= mid; i++) { An"</;HU
temp = data; VG5+CU
} PuT@}tw
for (j = 1; j <= r - mid; j++) { lq&wXi
temp[r - j + 1] = data[j + mid]; m~u5kbHOi=
} O#k6' LN?
int a = temp[l]; T'&I{L33Y
int b = temp[r]; @zz1hU
for (i = l, j = r, k = l; k <= r; k++) { r1LViK
if (a < b) { fhp<oe>D
data[k] = temp[i++]; qI<mjB{3`
a = temp; #=f?0UTA
} else { >wBJy4:
data[k] = temp[j--]; &LVn6zAba
b = temp[j]; jeX^}]x|%
} k_q0Q;6w!l
} W"'iIh)z `
} }J1tdko#
.CU5}Tv-
/** mkF"
* @param data qX
* @param l Boz@bl mCB
* @param i xAe~]k_D
*/ SNE#0L'}
private void insertSort(int[] data, int start, int len) { V8-oYwOR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wK-3+&,9
} z3M6V}s4
} w1"nffhO
} ,%Up0Rr,
} &PK\|\\2
Q|L9gz[?
堆排序： rJ{O(n]j
,JN8f]a^"g
package org.rut.util.algorithm.support; yi%-7[*]=
RYl>
import org.rut.util.algorithm.SortUtil; cwWodPNm
2e9es
/** fKeT~z{~
* @author treeroot q**G(}K
* @since 2006-2-2 D]~MC
* @version 1.0 _DNHc*
*/ j;3[KLmuK%
public class HeapSort implements SortUtil.Sort{ o1Q7Th
fasgmi}
/* (non-Javadoc) Qx47l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 69NQ]{1
*/ yz*6W zD
public void sort(int[] data) { UHxE)]J
MaxHeap h=new MaxHeap(); Yf~{I-|`q
h.init(data); @kU@N?5e
for(int i=0;i h.remove(); bk^TFE1l
System.arraycopy(h.queue,1,data,0,data.length); J6G(_(d
} E7)=`kSl
_Bp1co85MQ
private static class MaxHeap{ G\Ro}5TO
Bw64
void init(int[] data){ *9c!^$V
this.queue=new int[data.length+1]; Fa_VKAq
for(int i=0;i queue[++size]=data; Y> Wu
fixUp(size); /3:q#2'v
} Nn"+w|v[ev
} u(t#Ze~Y1
ZRVT2VfN
private int size=0; *@)O7vB
R@#G>4
private int[] queue; z,bQQ;z9
w MP
public int get() { ' dx1x6
return queue[1]; nn9wdt@.]
} O Wj@<N
pBP.x#|
public void remove() { FEW_bP/4
SortUtil.swap(queue,1,size--); z2hc.29t
fixDown(1); \$OF1i@
} @b~fIW_3>
file://fixdown 9Q-*@6G
private void fixDown(int k) { (N=5.7"T
int j; _#}n~}d
while ((j = k << 1) <= size) { PF7&p~O(Z
if (j < size %26amp;%26amp; queue[j] j++; JA_BKA
if (queue[k]>queue[j]) file://不用交换 4bJZmUb
break; Mz;[+p
SortUtil.swap(queue,j,k); xOHgp=#D
k = j; [mr9(m[F
} m7GR[MR
} u=/CRjot
private void fixUp(int k) { pOkLb #
while (k > 1) { JiU9CeD3
int j = k >> 1; ?8mlZ X9C
if (queue[j]>queue[k]) STw#lU) %(
break; (q7 Ry4-
SortUtil.swap(queue,j,k); \7 NpT}dj
k = j; ^F"iP7
} @*DyZB
} 'EfR|7m
4r0b)Y&I
} k8uvNLA)a
{E0z@D)U-
} LW:LFzp
D^;*U[F?
SortUtil： .*JA!B
F5qFYL;
package org.rut.util.algorithm; AkT<2H|4
A &9(mB
import org.rut.util.algorithm.support.BubbleSort; rzI|?QaPi
import org.rut.util.algorithm.support.HeapSort; 5rV((
import org.rut.util.algorithm.support.ImprovedMergeSort; l?)ZJ3]a
import org.rut.util.algorithm.support.ImprovedQuickSort; H7kPM[
import org.rut.util.algorithm.support.InsertSort; A?T<",bO
import org.rut.util.algorithm.support.MergeSort; FsGlJ
import org.rut.util.algorithm.support.QuickSort; 9A7@ 5F
import org.rut.util.algorithm.support.SelectionSort; "h7tnMS
import org.rut.util.algorithm.support.ShellSort; ) (Tom9^
H<G4O02i_
/** 3TZ*RPmFRm
* @author treeroot kY&h~Q
* @since 2006-2-2 =@5x"MOz
* @version 1.0 Iu35#j
*/ E|$Oha[
public class SortUtil { )CS.F=
public final static int INSERT = 1; K!mOr
public final static int BUBBLE = 2; b]JI@=s?
public final static int SELECTION = 3; J!*/a'Cv
public final static int SHELL = 4; 'XUKN/.
public final static int QUICK = 5; 7RvUH-S[
public final static int IMPROVED_QUICK = 6; &X]\)`j0
public final static int MERGE = 7; 2.X"f
public final static int IMPROVED_MERGE = 8; UP{j5gR:_
public final static int HEAP = 9; Y}DonF
=0'q!}._!
public static void sort(int[] data) { %,*G[#*&
sort(data, IMPROVED_QUICK); nD2,!71
} Wi}FY }f
private static String[] name={ 9cv]y#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TV}}dw
}; h`}3h< 8
<_./SC
private static Sort[] impl=new Sort[]{ ;!T{%-tP
new InsertSort(), ?n\*,{9
new BubbleSort(), .~gl19#:T
new SelectionSort(), nB ".'=
new ShellSort(), Jj^GWZRu
new QuickSort(), w_iamqe,
new ImprovedQuickSort(), (:+>#V)pZ
new MergeSort(), T^}
new ImprovedMergeSort(), X+n`qiwq
new HeapSort() *}):<nB$^
}; TjBY 4
<[/%{sUNC
public static String toString(int algorithm){ ozr9>b>M
return name[algorithm-1]; 2`=6%s
} :;!\vfZbU
#DkD!dW(l
public static void sort(int[] data, int algorithm) { ;bX4(CMe &
impl[algorithm-1].sort(data); H2-28XGc
} @lUlY2
te4= S
public static interface Sort { VRW]a
public void sort(int[] data); AP\ofLmq
} v1.q$ f^(
Us~ X9n_F
public static void swap(int[] data, int i, int j) { <39!G7ny
int temp = data; qYp$fmj
data = data[j]; Y#01o&f0n
data[j] = temp; 8)\M:s~7&
} qOG}[%<^n7
} [W,-1.$!dM