[JAVA]用Java实现的各种排序

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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; _N-7H\hF
} h?ia4t
int i1=l; 5AjK7[<L
int i2=mid+1; j qdI=!H
for(int cur=l;cur<=r;cur++){ Qrt8O7&('
if(i1==mid+1) 5~44R@`
data[cur]=temp[i2++]; Gqia@>T4*N
else if(i2>r) xLD6A5n,[
data[cur]=temp[i1++]; gOWyV@
else if(temp[i1] data[cur]=temp[i1++]; fN4pG*D
else HJ'93,
data[cur]=temp[i2++]; n5JB'F)
} k0YsAa#6V
} ILO+=xU
FSQ&J|O
} <eh(~
y(]|jRo
改进后的归并排序: hv"toszj\
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package org.rut.util.algorithm.support; w7Pe<vT
dI 5sqM:
import org.rut.util.algorithm.SortUtil; 4bxkp3~h;
)>Q 2G/@
/** 28)TXRr-
* @author treeroot b$ x"&&
* @since 2006-2-2 -+9x 0-P
* @version 1.0 3N bn|_`(
*/ wqwJpWIe
public class ImprovedMergeSort implements SortUtil.Sort { @\DD|o67
_ <;Q=?'*
private static final int THRESHOLD = 10; O9|'8"AF
BH-[q9pf
/* 0`P]fL+&
* (non-Javadoc) rq1kj 8%2
* osd^SnL1/5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jccW8g~ ~
*/ bg,}J/
public void sort(int[] data) { )T64(_TE
int[] temp=new int[data.length]; tRy D@}
mergeSort(data,temp,0,data.length-1); 0`!Q-G7
} &1p8#i
~^^ey17
private void mergeSort(int[] data, int[] temp, int l, int r) { Wv0'?NL.
int i, j, k; nFfCw%T?
int mid = (l + r) / 2; Y/S3)o
if (l == r) P*PL6UQ
return; vaj66nV
if ((mid - l) >= THRESHOLD) Ib2@Wi
mergeSort(data, temp, l, mid); ^)q2\YE;
else x ctU.)p
insertSort(data, l, mid - l + 1); Y(y9l{'
if ((r - mid) > THRESHOLD) U R@BSK'
mergeSort(data, temp, mid + 1, r); vs1Sh?O
else +?iM$}8!U
insertSort(data, mid + 1, r - mid); |mk}@OEf
i$ L]X[
for (i = l; i <= mid; i++) { |)qK g
temp = data; ;:c%l.Y2
} O|Ic[XfLx
for (j = 1; j <= r - mid; j++) { H\I!J@6g
temp[r - j + 1] = data[j + mid]; <} yp
} xD
int a = temp[l]; u7"VeTz
int b = temp[r]; + |qfgi
for (i = l, j = r, k = l; k <= r; k++) { {TncqA
if (a < b) { v{2DBr
data[k] = temp[i++]; z"K( bw6
a = temp; h)_Gxe"x
} else { }[z<iij4
data[k] = temp[j--]; g(<T u^F
b = temp[j]; `4%;qLxngP
} VI24+h'J
} HmExfW
} OB6J.dF[%
T;!ukGoFP
/** l>~`;W
* @param data nMGrG
* @param l 8lOI\-
* @param i q[G/}
*/ ^Cg^`n?@b
private void insertSort(int[] data, int start, int len) { j/9WOIfa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #SQvXMT
} A)hhnb0o
} ~XUOWY75
} :p<kQ4
} {pDTy7!Hs
L)F1NuR
堆排序： [5Fd P0
>BNw
package org.rut.util.algorithm.support; k&)K(
u#+RUtM
import org.rut.util.algorithm.SortUtil; 8xF)_UV
5VR.o!h3I
/** r<*O
* @author treeroot %bP~wl~
* @since 2006-2-2 wE$s'e
* @version 1.0 QCOLC2I
*/ fcRj
public class HeapSort implements SortUtil.Sort{ r C_d$Jv
1E8H%2$ V
/* (non-Javadoc) n%/i:Whs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4'SaEsA~
*/ '>3`rsu
public void sort(int[] data) { <EMkD1e
MaxHeap h=new MaxHeap(); k(P3LJcYQ
h.init(data); *URdd,){i
for(int i=0;i h.remove(); vwKw?Z0%J
System.arraycopy(h.queue,1,data,0,data.length); %}C9
} #?9Q{0e
mD7}t
private static class MaxHeap{ Sx8l<X
.nEs:yn
void init(int[] data){ P5xI
this.queue=new int[data.length+1]; '61i2\[lZQ
for(int i=0;i queue[++size]=data; 9x=3W?K:,
fixUp(size); flG=9~qcGQ
} A 4j<\xL
} M>T[!*nTj
sAi&A9"*
private int size=0; 2F1ZAl
Fn!SGX~kx$
private int[] queue; ]:&n-&@L
{I{3(M#"
public int get() { /xySwSmh3
return queue[1]; xO7Yt l
} 'M8aW!~
lUv=7" [
public void remove() { :.$"kXm^
SortUtil.swap(queue,1,size--); /7gi/uh~-(
fixDown(1); \jyjQ,v)
} !v9lk9SV
file://fixdown QHzgy?
private void fixDown(int k) { tPU-1by$
int j; +`.,| |Mq
while ((j = k << 1) <= size) { :)IV!_>'d
if (j < size %26amp;%26amp; queue[j] j++; kUa)smh
if (queue[k]>queue[j]) file://不用交换 ewnfeg1
break; CISO<z0
SortUtil.swap(queue,j,k); YT=eVg53
k = j; 8o|P&q(v*
} %d;<2b0
} LjaGyj>)
private void fixUp(int k) { L8&D(wh/f
while (k > 1) { {)@D`{$
int j = k >> 1; {%b }Z2
if (queue[j]>queue[k]) i#W*'
break; +Ok%e.\ZM
SortUtil.swap(queue,j,k); 6~8F!b2
k = j; xWE8Wm
} 7I}P*%(f
} U O<:.6"
6/tI8H3E
} SfB8!V|;
pQWHG#?7
} 3yV'XxC
p[v#EyoC
SortUtil： CO^Jz
cCiI{
package org.rut.util.algorithm; >w|*ei:@S
@r;wobt
import org.rut.util.algorithm.support.BubbleSort; 0$HmY2 Men
import org.rut.util.algorithm.support.HeapSort; .DguR2KT
import org.rut.util.algorithm.support.ImprovedMergeSort; Vz%OV}\
import org.rut.util.algorithm.support.ImprovedQuickSort; \9:wfLF8!
import org.rut.util.algorithm.support.InsertSort; TDNf)Mm
import org.rut.util.algorithm.support.MergeSort; '6-$Xq0^E
import org.rut.util.algorithm.support.QuickSort; o3N]`xD'
import org.rut.util.algorithm.support.SelectionSort; 9V 0}d2d
import org.rut.util.algorithm.support.ShellSort; ?&X6:KJQ
0CAa^Q^w
/** qpp/8M
* @author treeroot M\D]ml~
* @since 2006-2-2 ;inzyFbL=
* @version 1.0 %Mn.e a
*/ 1n=_y o
public class SortUtil { L":bI&V?:
public final static int INSERT = 1; _P7tnXww
public final static int BUBBLE = 2; 1S:|3W
public final static int SELECTION = 3; SJ?)%[(T
public final static int SHELL = 4; #VGjCEeU
public final static int QUICK = 5; b]Z@^<_E
public final static int IMPROVED_QUICK = 6; aFj.i8+
public final static int MERGE = 7; 4n0xE[-
public final static int IMPROVED_MERGE = 8; /)>S<X
public final static int HEAP = 9; cYNV\b4-
lr@#^
public static void sort(int[] data) { NwlU%{7W6
sort(data, IMPROVED_QUICK); -YGbfd<wq
} T:iP="?{
private static String[] name={ _.V?A*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Sq2P-y!w
}; NHQF^2\\
M+P$/Wk
private static Sort[] impl=new Sort[]{ ^%>kO,
new InsertSort(), X~9j$3lUBR
new BubbleSort(), =L-I-e97@
new SelectionSort(), F<&!b2)ML
new ShellSort(), LnsD
new QuickSort(), Ao9R:|9
new ImprovedQuickSort(), CE%_A[a
new MergeSort(), %O[N}_XHEh
new ImprovedMergeSort(), JXqr3Np1
new HeapSort() l$xxrb9P!
}; d_z59
3=0E!e
public static String toString(int algorithm){ K^l:MxO-X
return name[algorithm-1]; Ms^dRe)
} mpw~hW0-
ZWUP^V
public static void sort(int[] data, int algorithm) { 3gZ8.8q3
impl[algorithm-1].sort(data); W"q@Qa`Bm
} *OjKcs
An`3Ex[
public static interface Sort { IE2"rQT
public void sort(int[] data); .)tSg
} XMIbUbUk-
~Bi_7 Q
public static void swap(int[] data, int i, int j) { XGrue6ya
int temp = data; 23\RJpKb
data = data[j]; 0&+k.Vg
data[j] = temp; 9xI GV!
} 'tgKe!-@
} hqvE!Of