[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; G,]z(%
} bEd?^h
int i1=l; zks#EzQ
int i2=mid+1; J?IC~5*2
for(int cur=l;cur<=r;cur++){ N!L'W\H,
if(i1==mid+1) Pu..NPl+
data[cur]=temp[i2++]; ds]?;l"
else if(i2>r) |<rfvsQ.
data[cur]=temp[i1++]; `E W!-v)
else if(temp[i1] data[cur]=temp[i1++]; yX'IZk#_L
else E5gl^Q?Z
data[cur]=temp[i2++]; D-pX<0-y
} Ukc'?p,*
} 4[1k\
gLD{1-v
} f*<ps o
!!WJn}
改进后的归并排序: K6hfauWd[
hO6RQ0Iv@
package org.rut.util.algorithm.support; -2 xE#r
&DLhb90
import org.rut.util.algorithm.SortUtil; ~M*gsW$
1"O&40l
/** b@6:1x
* @author treeroot ufPCx|x~
* @since 2006-2-2 H* /&A9("
* @version 1.0 ({e7U17[#
*/ 2:'lZQ
public class ImprovedMergeSort implements SortUtil.Sort { BC({ EE~R)
)[jy[[K(
private static final int THRESHOLD = 10; g/#~N~&
+9zA^0
/* ~KRnr0
* (non-Javadoc) #ZlM?Q
* X2^_~<I{,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t#5:\U5r.
*/ y9!:^kDI
public void sort(int[] data) { <tuS,.
int[] temp=new int[data.length]; sJ~P:g
mergeSort(data,temp,0,data.length-1); c&*l"
} {y6C0A*
H)5QqZ8
private void mergeSort(int[] data, int[] temp, int l, int r) { A"4@L*QV
int i, j, k; #ZWl=z5aBi
int mid = (l + r) / 2; <KLg0L<W
if (l == r) .S_QQM}Q
return; U5<@<j(@
if ((mid - l) >= THRESHOLD) o/1JO_41
mergeSort(data, temp, l, mid); RZh}:
else }9CrFTbx;
insertSort(data, l, mid - l + 1); iyj3QLqE
if ((r - mid) > THRESHOLD) r6t&E%b
mergeSort(data, temp, mid + 1, r); nY0sb8lZJ
else hVUIBJ/5(-
insertSort(data, mid + 1, r - mid); WNF9#oN|oT
$XGtS$
for (i = l; i <= mid; i++) { iBoEZEHjw
temp = data; <hv7s,i
} lFfXWNb
for (j = 1; j <= r - mid; j++) { .C= I^
temp[r - j + 1] = data[j + mid]; e$|VG* d
} o&$hYy"<.L
int a = temp[l]; fHfY}BQS
int b = temp[r]; 2~FPw{]j
for (i = l, j = r, k = l; k <= r; k++) { |I^y0Q:K
if (a < b) { !SF^a6jT
data[k] = temp[i++]; {mSJUK?TKl
a = temp; 8lwM{?k$
} else { %F J#uQXZ
data[k] = temp[j--]; fsvYU0L
b = temp[j]; %v4ZGtKC@
} M#a&\cqC
} wmYvD<
} 31}W6l88c
9j#@p
/** A[H;WKn0
* @param data C9jbv/c
* @param l x?L hq2
* @param i *Jt8
*/ <HQ&-jx
private void insertSort(int[] data, int start, int len) { xl2g0?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S$O,] @)
} +(mL~td01
} dJl^ADX[@
} ({M?Q>s
} % {Q-8w!
!8$RBD %
堆排序： YqU/\f+
JJ5C}`(
package org.rut.util.algorithm.support; frqJN
kCA5|u
import org.rut.util.algorithm.SortUtil; cNj*E =~;
io4aYB\
/** &Rp"rMeW
* @author treeroot -t4 [oB
* @since 2006-2-2 e<5Y94YE
* @version 1.0 <TxC!{<
*/ lLCdmxbT
public class HeapSort implements SortUtil.Sort{ #T\
0M8.U
/* (non-Javadoc) &+r4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o:UXPAj
*/ `^##b6jH
public void sort(int[] data) { 3hS6jS
MaxHeap h=new MaxHeap(); l h/&__
h.init(data); M<[?g5=#
for(int i=0;i h.remove(); CgnXr/!L
System.arraycopy(h.queue,1,data,0,data.length); VXIQw'Cq
} 8#59iQl
d+}kg
private static class MaxHeap{ (1){A8=?o
3k'.(P|F
void init(int[] data){ A1A3~9HuK
this.queue=new int[data.length+1]; 5f{|"LG&
for(int i=0;i queue[++size]=data; 8Rxc&`_X
fixUp(size); #J$qa Ul
} Nn#u%xvJt
} 9#rt:&xo0
Z@J.1SaB
private int size=0; =Od>;|]m
Q6^x8
private int[] queue; ;&?pd"^<_Z
)^ <3\e
public int get() { ?63&g{vA
return queue[1]; \##`pa(8
} +v15[^F
i&Kz*,pt
public void remove() { $(q8y/,R*-
SortUtil.swap(queue,1,size--); G;]:$J
fixDown(1); _N'75
} )|]Z>>%t
file://fixdown @2' %o<lF
private void fixDown(int k) { (ZPXdr
int j; 7ZFJexN]
while ((j = k << 1) <= size) { o4)hxs
if (j < size %26amp;%26amp; queue[j] j++; TnE+[.Qu
if (queue[k]>queue[j]) file://不用交换 /F~X,lm*~
break; +R[4\ hC0Y
SortUtil.swap(queue,j,k); J_xG}d
k = j; #@Y/{[s|@
} ;NsO
} T9)wj][ .
private void fixUp(int k) { 9?`RR/w
while (k > 1) { 1^{`lK~2
int j = k >> 1; OVswt
if (queue[j]>queue[k]) dZ2`{@AYY
break; 9P"iuU
SortUtil.swap(queue,j,k); 2)\vj5<~$
k = j; t(?<#KUB-
} 7+XM3
} Lko`F$5X
p|VcMxT9-
} )5yj/0oT
4}yE+dRUK:
} LprM;Q_
=! mJG
SortUtil： P5URvEnz:
Q_4Zb
package org.rut.util.algorithm; +d39f-[
PXEKV0y
import org.rut.util.algorithm.support.BubbleSort; I/s.xk_i
import org.rut.util.algorithm.support.HeapSort; J22rv(
import org.rut.util.algorithm.support.ImprovedMergeSort; '29WscU
import org.rut.util.algorithm.support.ImprovedQuickSort; ;$!I&<)
import org.rut.util.algorithm.support.InsertSort; aWaw&u
import org.rut.util.algorithm.support.MergeSort; Rd! 2\|
import org.rut.util.algorithm.support.QuickSort; b5 Q NEi
import org.rut.util.algorithm.support.SelectionSort; :ba/W&-d
import org.rut.util.algorithm.support.ShellSort; W_<4WG
F6dr
/** 0.DQO;
* @author treeroot K]"Kf{bx
* @since 2006-2-2 1K[(ou'rl
* @version 1.0 25em[Q:
*/ 4lz{G*u
public class SortUtil { J{~Rxa
public final static int INSERT = 1; 9S1#Lr`r
public final static int BUBBLE = 2; zj20;5o>U&
public final static int SELECTION = 3; xo~g78jm7,
public final static int SHELL = 4; +,_c/(P
public final static int QUICK = 5; mk=#\>
public final static int IMPROVED_QUICK = 6; S< x:t(
public final static int MERGE = 7; 4/MNqit+
public final static int IMPROVED_MERGE = 8; u~'OcO
public final static int HEAP = 9; T]71lRY5
)zJ=PF
public static void sort(int[] data) { y8?t-Pp]1
sort(data, IMPROVED_QUICK); M+aEma
} ~B_ D@gV|
private static String[] name={ _!:@w9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Efr&12YSS
}; >L[lV_M_>
C1QWU5c v
private static Sort[] impl=new Sort[]{ ZvH{wt
new InsertSort(), OoaY
new BubbleSort(), v~5<:0dL
new SelectionSort(), `P.CNYR<J
new ShellSort(), K^H>~`C=
new QuickSort(), 295w.X(J
new ImprovedQuickSort(), ;BI)n]L
new MergeSort(), [hU=mS8=^
new ImprovedMergeSort(), kp`0erJqw
new HeapSort() 3*WS"bt
}; F]5\YYXO
O5;-Om
public static String toString(int algorithm){ o!Fl]3F
return name[algorithm-1]; 0w3b~RJ
} 0&$xX!]
Gvn: c/m;
public static void sort(int[] data, int algorithm) { =|0/Ynfe
impl[algorithm-1].sort(data); l0`'5>
} dS$ji#+d$
fn1pa@P
public static interface Sort { O71BM@2<
public void sort(int[] data); s.y}U5Ty?P
} g1qi\axm
8]C1K Zs
public static void swap(int[] data, int i, int j) { 7) 0q--B
int temp = data; 2U%qCfh6|
data = data[j]; }n95< {
data[j] = temp; [TCRB`nTQF
} _,Q[2gQ5N
} !$r9C/k