[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; L$L/5/
} yPY}b_W
int i1=l; '8%jA$o\g
int i2=mid+1; ;)~}/nR<a
for(int cur=l;cur<=r;cur++){ =LXjq~p
if(i1==mid+1) YP E1s
data[cur]=temp[i2++]; GDF/0-/Z
else if(i2>r) aeZ$Wu>]W
data[cur]=temp[i1++]; pwvzs`[;
else if(temp[i1] data[cur]=temp[i1++]; eHHY.^|
else @k=UB&?I
data[cur]=temp[i2++]; 0JFS%Yjw[
} "s-3226kj
} y0vJ@ %`
H9;0$Y(e-
} ;~D$rT
Z(j"\d!y
改进后的归并排序: Hlhd6be
}NjZfBQW`
package org.rut.util.algorithm.support; Ri>4:V3K
nTsKJX%\
import org.rut.util.algorithm.SortUtil; Pi+pQFz5
"C0?s7Y
/** wZ4w`|'
* @author treeroot WwsH7X)
* @since 2006-2-2 Ml_Hq>\U
* @version 1.0 D:] QBA)C
*/ wE[gp+X~
public class ImprovedMergeSort implements SortUtil.Sort { d|#&j."
|d$4Fu(M~
private static final int THRESHOLD = 10; 6ChFsteGFr
r7)qr%n
/* s\+| ql
* (non-Javadoc) mT:NC'b<9
* vtq$@#?~ b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xU/7}='T
*/ kEgpF{"%n
public void sort(int[] data) { clG@]<a`_
int[] temp=new int[data.length]; 7|5X> yt
mergeSort(data,temp,0,data.length-1); Ii9[[I
} Ff{,zfN+3
TAxu]C$P
private void mergeSort(int[] data, int[] temp, int l, int r) { 3Fb9\2<H
int i, j, k; lArKfs/
int mid = (l + r) / 2; X[<%T}s#
if (l == r) ho-#Xbq#g
return; /KLkrW
if ((mid - l) >= THRESHOLD) zmU@ k
mergeSort(data, temp, l, mid); SZ29B
else ">._&8KkE0
insertSort(data, l, mid - l + 1); lihIPMU
if ((r - mid) > THRESHOLD) @)\4 $#+-
mergeSort(data, temp, mid + 1, r); |nCVM\+5T
else 80zpRU"
insertSort(data, mid + 1, r - mid); #x qiGK
Rk,'ujc
for (i = l; i <= mid; i++) { beaSvhPU
temp = data; =t^jlb
} O1D|T"@
for (j = 1; j <= r - mid; j++) { rFUR9O.{E
temp[r - j + 1] = data[j + mid]; G9^xv
} vgE -t
int a = temp[l]; )I#{\^
int b = temp[r]; mC0_rN^Aj
for (i = l, j = r, k = l; k <= r; k++) { -"NK"nb
if (a < b) { #c!rx%8I
data[k] = temp[i++]; 4O{G^;
a = temp; !&xci})7a
} else { qJ sH
data[k] = temp[j--]; -Bl]RpHCe
b = temp[j]; lA%FS]vh
} | C^.[)
} k#bG&BF
} FDFwx|
<UF0Xc&X'
/** "OwK-
* @param data ]5K+W
* @param l /GVjesN
* @param i cZJ5L>ox
*/ LSo*JO6
private void insertSort(int[] data, int start, int len) { tLi91)oG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "fr{:'HX
} Uks%Mo9on
} h%U}Y5Ps~
} 3.@LAF
} $ay!'MK0d
oYdE s&qq
堆排序： &?1O D5
^2H;
package org.rut.util.algorithm.support; dB6['z)2
U?an\rv
import org.rut.util.algorithm.SortUtil; r<'DS9m
#}Yrxf
/** -#v1/L/=
* @author treeroot x3g4r_
* @since 2006-2-2 J/fnSy
* @version 1.0 !zvjgDlZv
*/ ?2l`%l5(
public class HeapSort implements SortUtil.Sort{ 41R6V>e@9J
?"*JV1 9
/* (non-Javadoc) 9/!1J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AT)b/ycC
*/ $|xSM2
public void sort(int[] data) { n\)1Bz
MaxHeap h=new MaxHeap(); <}:` Y"
h.init(data); z3]W #
for(int i=0;i h.remove(); }tw+8YWkz
System.arraycopy(h.queue,1,data,0,data.length); V3#ms0
} 0^R, d M
zz[fkH3
private static class MaxHeap{ B2oKvgw
'da 'WZG
void init(int[] data){ ^GAJ9AF@(
this.queue=new int[data.length+1]; }NoP(&ebz*
for(int i=0;i queue[++size]=data; hf]m'5pb
fixUp(size); .b+ix=:
} SkMFJ?J/
} 4w~%MZA^
y+T[="W
private int size=0; 9@ YKx0
zBlv?JwG
private int[] queue; Cdib{y<ji
L-}J=n\
public int get() { 5wmd[YL
return queue[1]; #GLW3}
} ,% QhS5e
'UUj(1 f
public void remove() { f+Acs*.GQ
SortUtil.swap(queue,1,size--); X3a9-
fixDown(1); 'prHXzi(h
} %0}^M1
file://fixdown ]VxC]a2
private void fixDown(int k) { Y*$>d/E
int j; I-Z|FKh_C
while ((j = k << 1) <= size) { vue^bn
if (j < size %26amp;%26amp; queue[j] j++; D/f4kkd
if (queue[k]>queue[j]) file://不用交换 MW6z&+Z
break; DrKB;6
SortUtil.swap(queue,j,k); H)i|?3Ip
k = j; "5Y6.$Cuf!
} ?!&%-R6*
} C&>*~
private void fixUp(int k) { ?*yyne
while (k > 1) { n Syq}Y3
int j = k >> 1; {@vnKyf^K
if (queue[j]>queue[k]) ,bXZ<RY$
break; C=V2Y_j
SortUtil.swap(queue,j,k); 1Vdi5;dn
k = j; F'b%D
} ,#UZp\zZ*
} Jr( =Y@Z'
4[@YF@_=M
} t|eH'"N%o
EC;>-s
} xsB0LUt
vo`&
SortUtil： O`c50yY
Hl0" zS[
package org.rut.util.algorithm; =K18|Q0m
E{&MmrlL,
import org.rut.util.algorithm.support.BubbleSort; .a]#AFX
import org.rut.util.algorithm.support.HeapSort; -1,0hmn=+
import org.rut.util.algorithm.support.ImprovedMergeSort; /3,Lp-kp
import org.rut.util.algorithm.support.ImprovedQuickSort; >PSO]%mE
import org.rut.util.algorithm.support.InsertSort; q:/df]Ntt
import org.rut.util.algorithm.support.MergeSort; 4lB??`UN
import org.rut.util.algorithm.support.QuickSort; /W$i8g
import org.rut.util.algorithm.support.SelectionSort; VwE4:/7YN
import org.rut.util.algorithm.support.ShellSort; HKXC=^}x'
+q}t%K5
/** 8^>c_%e}
* @author treeroot lP3|h*
* @since 2006-2-2 Si>38vCJ*
* @version 1.0 VFL^-tXnA^
*/ "vSKj/]
public class SortUtil { NC%hsg^0/
public final static int INSERT = 1; OALNZKP
public final static int BUBBLE = 2; x_nwD"
public final static int SELECTION = 3; WJOoDS!i
public final static int SHELL = 4; (MI>7| ';
public final static int QUICK = 5; \4q|Qno8
public final static int IMPROVED_QUICK = 6; qK a}O*
public final static int MERGE = 7; GYfOwV!zB
public final static int IMPROVED_MERGE = 8; [|OII!"
public final static int HEAP = 9; b&+zAt.
\~l_w ,Poo
public static void sort(int[] data) { `SFeln{1B
sort(data, IMPROVED_QUICK); <ToBVGX
} Lj3o-@\*j
private static String[] name={ h6 {vbYj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZOqS"3j! j
}; x%=CEe?6
FAEF
private static Sort[] impl=new Sort[]{ ]8\I{LR
new InsertSort(), s2{SbOBis
new BubbleSort(), Ev5~= ]
new SelectionSort(), LigB!M
new ShellSort(), fz=?QEG
new QuickSort(), /RxP:>hVv
new ImprovedQuickSort(), '\I(n|\
new MergeSort(), 2+gbMd4n
new ImprovedMergeSort(), P9bM+@5e
new HeapSort() 2|,L 9
}; 2bNOn%!
Cf=H~&`Z
public static String toString(int algorithm){ [i`
return name[algorithm-1]; LpU}.
} HU $"o6ap
;o!p9MEpz;
public static void sort(int[] data, int algorithm) { q@ -B+
impl[algorithm-1].sort(data); PC_!
} 'w+]kt-
'dwT&v]@
public static interface Sort { -I|xW
public void sort(int[] data); 0N,<v7PX
} [Cl0Kw.LD
JpC'(N
public static void swap(int[] data, int i, int j) { 7y'":1
int temp = data; R&Y_
data = data[j]; < '5~p$
data[j] = temp; HY)xT$/J
} 2!^=G=H/
} ! I@w3`