[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; 7\Co`J>p2
} ,[* ;UR
int i1=l; *$S#o#5
int i2=mid+1; ^*0'\/N&
for(int cur=l;cur<=r;cur++){ <`)iA-Df;9
if(i1==mid+1) L_Q S0_1
data[cur]=temp[i2++]; (!3;X"l
else if(i2>r) BgM%+b8u
data[cur]=temp[i1++]; -}P7$|O&
else if(temp[i1] data[cur]=temp[i1++]; ]W/>Ldv
else 9gy(IRGq/
data[cur]=temp[i2++]; le8 #Z}p
} 2Q@Y^t
} y\D=Z N@
<.bRf
} 1Ipfw
Xh F_]
改进后的归并排序: D<>@ %"%
XRxj W
package org.rut.util.algorithm.support; `:p1&OS
p$Hi[upy
import org.rut.util.algorithm.SortUtil; | &7S8Q
; b*i3*!g
/** _[t8rl
* @author treeroot ?T!)X)A#
* @since 2006-2-2 yz8jU*H
* @version 1.0 $,ikv?"L
*/ 4t*so~
public class ImprovedMergeSort implements SortUtil.Sort { 2:SO_O4C
v+xB7w
private static final int THRESHOLD = 10; '#.#$8l
"g0(I8
/* 0 ipN8Pg+
* (non-Javadoc) Hr^3`@}#1
* g9~]s9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pDl3!m
*/ D=+NxR[
public void sort(int[] data) { IeP WOpj3
int[] temp=new int[data.length]; TB!(('
mergeSort(data,temp,0,data.length-1); T^:fn-S}=
} 4CrLkr
'V (,.'
private void mergeSort(int[] data, int[] temp, int l, int r) { `\CVV*hP
int i, j, k; SwW['c'*]B
int mid = (l + r) / 2; b?T
if (l == r) oyvKag
return; n}?wVfEy
if ((mid - l) >= THRESHOLD) \)/yC74r7(
mergeSort(data, temp, l, mid); !5Sd2<N
else y >+mc7n
insertSort(data, l, mid - l + 1); ?!'ZfQ:zK
if ((r - mid) > THRESHOLD) Nd@~>&F
mergeSort(data, temp, mid + 1, r); Ef)yQ
else *F`A S>
insertSort(data, mid + 1, r - mid); "@/62b
-LW[7s$
for (i = l; i <= mid; i++) { g[[;w*;z
temp = data; Ii&7rdoxe
} t:)ERT")
for (j = 1; j <= r - mid; j++) { e<cM[6H'D
temp[r - j + 1] = data[j + mid]; !.TLW
} +>\id~c(
int a = temp[l]; MTOy8 Im
int b = temp[r]; 1:M@&1LYp
for (i = l, j = r, k = l; k <= r; k++) { 2%u;$pj
if (a < b) { V[nQQxWp=
data[k] = temp[i++]; T~4N+fK
a = temp; Qk1xUE
} else { hA1-){aw3q
data[k] = temp[j--]; .(CP. d
b = temp[j]; /i]y$^
} 8}s.Fg@tE
} Qf$|_&|
} x@Hd^xH`
cC'x6\a
/** &#yR;{
* @param data Y>+y(ck
* @param l N!2Rl
* @param i U#&7p)4(
*/ Ch \&GzQ
private void insertSort(int[] data, int start, int len) { m3<+yz$!r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oXXC@[??}N
} 2*iIjw3g
} $*R/tJ.
} T~_/Vi
} uxaYCa?
({WyDu&=
堆排序： A:l@_*C..
H<EQu|f&x
package org.rut.util.algorithm.support; k%]=!5F
P [Uy
import org.rut.util.algorithm.SortUtil; 9ZXlR?GA
uocHa5J
/** }a AH
* @author treeroot ig}A9j?]
* @since 2006-2-2 \p{5D`HY
* @version 1.0 \*f;Xaa
*/ e[_m<e
public class HeapSort implements SortUtil.Sort{ qMt++*Ls
R:Q0=PzDi#
/* (non-Javadoc) L2Pujk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uvP2Wgt
*/ YjOs}TD lx
public void sort(int[] data) { Rp7ntI:
MaxHeap h=new MaxHeap(); rE9I>|tX
h.init(data); 5NoI~X=
for(int i=0;i h.remove(); /zDi9W*~1
System.arraycopy(h.queue,1,data,0,data.length); }v:jncp
} %wcSM~w
:+Om]#`Vls
private static class MaxHeap{ :0& X^]\
z4M9M7)"
void init(int[] data){ h\v'9
this.queue=new int[data.length+1]; ,to+oSZE
for(int i=0;i queue[++size]=data; Tm_B^W}
fixUp(size); b2b?hA'k
} <Rh6r}f
} !l]dR@e
Wjhvxk
private int size=0; &nBa=Enf
J]f3CU,<N
private int[] queue; e@:sR
_4^R9Bt
public int get() { l2N]a9bq@
return queue[1]; iY"l}.7)
} \%^%wXfp
]BR,M4
public void remove() { sVG(N.y
SortUtil.swap(queue,1,size--); =] *.ZH#h
fixDown(1); mU}F!J#6
} 4jD2FFG- G
file://fixdown {43>m)8+
private void fixDown(int k) { Y%`xDI
int j; Uf}\p~;
while ((j = k << 1) <= size) { C4TE-OM8
if (j < size %26amp;%26amp; queue[j] j++; s(X;Eha
if (queue[k]>queue[j]) file://不用交换 P(F+f`T
break; |$5[(6T|
SortUtil.swap(queue,j,k); 3U_2!zF3_
k = j; a7N!B'y
} 3Zi@A4Wu
} k'0Pi6
private void fixUp(int k) { -B86U6^s
while (k > 1) { ^%O]P`$
int j = k >> 1; xhcK~5C
if (queue[j]>queue[k]) \=_{na_
break; Y ')x/H
SortUtil.swap(queue,j,k); 0}_[DAd6
k = j; giz7{Ai
} qucq,Yw
} x c{hC4^V
x?&$ci
} Q7W>qe%4
GnvL'ESa@M
} bw\@W{a%q
O)vp~@|
SortUtil： b0oMs=uBn
C*P7-oE2rh
package org.rut.util.algorithm; B(M6@1m_
..rOsg{
import org.rut.util.algorithm.support.BubbleSort; "~'b
import org.rut.util.algorithm.support.HeapSort; n=[/Z!
import org.rut.util.algorithm.support.ImprovedMergeSort; Yk=PS[f
import org.rut.util.algorithm.support.ImprovedQuickSort; 7hsGua
import org.rut.util.algorithm.support.InsertSort; hdrm!aBd
import org.rut.util.algorithm.support.MergeSort; hP15qKy
import org.rut.util.algorithm.support.QuickSort; W*2U="t
import org.rut.util.algorithm.support.SelectionSort; |P%Jw,}]9
import org.rut.util.algorithm.support.ShellSort; }sxYxn~
%n*-VAfE\
/** D-c`FG'
* @author treeroot 'q`^3&E
* @since 2006-2-2 cFJY^A
* @version 1.0 E~6c-Lw
*/ vh$%9ed
public class SortUtil { %f]:I
public final static int INSERT = 1; <_7*67{
public final static int BUBBLE = 2; P'_H/r/#
public final static int SELECTION = 3; 0\eIQp
public final static int SHELL = 4; wp&=$Aa)'
public final static int QUICK = 5; 9g<7i
public final static int IMPROVED_QUICK = 6; =zz~kon9
public final static int MERGE = 7; #"B\UN
public final static int IMPROVED_MERGE = 8; ^jx7@LgS=
public final static int HEAP = 9; P?k0zwOlBl
]UmFhBR-
public static void sort(int[] data) { sIy^m}02
sort(data, IMPROVED_QUICK); >6?__v]9G
} ,k;^G>< =
private static String[] name={ [EKQR>s)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RNe^; B
}; 76`8=!]R
}9FSO9*&}
private static Sort[] impl=new Sort[]{ 3U0`,c\ao*
new InsertSort(), [C'JH//q*t
new BubbleSort(), ?U2<
new SelectionSort(), 3qf Ym}d
new ShellSort(), r[*Vqcz
new QuickSort(), <_-hRbS
new ImprovedQuickSort(), ~Yy>zUH^X
new MergeSort(), bJX)$G
new ImprovedMergeSort(), ,=[?yJy
new HeapSort() `9BROZnq
}; o6uJyCO
~GZY5HF
public static String toString(int algorithm){ ):[7E(F=
return name[algorithm-1]; H["`Mn7j2
} MB~=f[cUnd
A|<jX}
public static void sort(int[] data, int algorithm) { C@'h<[v`1v
impl[algorithm-1].sort(data); 7Mg=b%IYs
} ci?qT,&
0|{u{w@!`
public static interface Sort { @fl-3q
public void sort(int[] data); ~ Q.7VDz
} bAx-"Lu
SMpH._VFeE
public static void swap(int[] data, int i, int j) { zo4qG+>o
int temp = data; Y!nJg1
data = data[j]; 3`t%g[D1
data[j] = temp; PoxK{Y
} ^rifRY-,yO
} xe^Gs]fm