[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; "kU>~~y,
} ~r PYJ
int i1=l; G#'Q~N
int i2=mid+1; drs-mt8
for(int cur=l;cur<=r;cur++){ (>mi!:
if(i1==mid+1) ?^Pq/VtZ
data[cur]=temp[i2++]; '6+Edu~Ho)
else if(i2>r) j;G[%gi6{
data[cur]=temp[i1++]; ,FY-d$3)
else if(temp[i1] data[cur]=temp[i1++]; Y[h#hZ
else Wge ho
data[cur]=temp[i2++]; hRRkFz/0&
} u8^Y,LN
} W?=$V>)
7Zo&+
} 7}A5u,.,ht
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改进后的归并排序: 0K/G&c?;=
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package org.rut.util.algorithm.support; KS?mw`Nr
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import org.rut.util.algorithm.SortUtil; l:q8Pg)
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/** "*+\KPCU
* @author treeroot 8,_ -0_^$
* @since 2006-2-2 !5? m
* @version 1.0 =MCNCV/<
*/ f.J9) lfb
public class ImprovedMergeSort implements SortUtil.Sort { TZ:34\u
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private static final int THRESHOLD = 10; Q:pzL "bT
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/* gA{'Q\
* (non-Javadoc) ka!Bmv)
* C`3V=BB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mF}c- D
*/ %V31B\]Nz7
public void sort(int[] data) { r?>Vx-
int[] temp=new int[data.length]; Ut]2`8-
mergeSort(data,temp,0,data.length-1); 6zv;lx0<D&
} amMjuyW
=l_rAj~I|
private void mergeSort(int[] data, int[] temp, int l, int r) { Zd8drT'@#
int i, j, k; -%>8.#~G
int mid = (l + r) / 2; ob)Q,;8R
if (l == r) D DQs42[
return; {K<uM'ww>
if ((mid - l) >= THRESHOLD) {>wI8
mergeSort(data, temp, l, mid); '/ihL^^@L
else I/Sv"X6E
insertSort(data, l, mid - l + 1); KUF$h Er
if ((r - mid) > THRESHOLD) xrfPZBLy
mergeSort(data, temp, mid + 1, r); h4tC. i~k
else r|*:9|y{"/
insertSort(data, mid + 1, r - mid); R$Zv0a&
|MR%{ZC^i
for (i = l; i <= mid; i++) { O%fUm0O d
temp = data; qZXyi'(d
} zIP[R):3&U
for (j = 1; j <= r - mid; j++) { P87ld._
temp[r - j + 1] = data[j + mid]; "\4]X"3<+
} `'kc|!%MUq
int a = temp[l]; mm_^gQ,`
int b = temp[r]; xIM8
for (i = l, j = r, k = l; k <= r; k++) { kxygf9I!;
if (a < b) { qx Wgt(Os
data[k] = temp[i++]; IY V-*/ |
a = temp; I<c@uXXV;!
} else { Z"-ntx#
data[k] = temp[j--]; 4pLQ"&>}80
b = temp[j]; f( ]R/'o
} mPckf
} (L`l+t1
} ;0;3BH A
y*}AX%8`e~
/** O|?Z~
* @param data m~##q}LZ
* @param l D}mo\
* @param i F='Xj@&O
*/ ;&K3[;a
private void insertSort(int[] data, int start, int len) { #D= tX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P\,F1N_?r
} F#jCEq
} y=-{Q
} A(q~{
} |VTWw<{LX
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堆排序： ^Vl^,@
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package org.rut.util.algorithm.support; qnabwF
J'|=*#
import org.rut.util.algorithm.SortUtil; DhY;pG,t
B1x'5S;Bq
/** {'h)
* @author treeroot tU9rCL:P
* @since 2006-2-2 /uC+.B9k
* @version 1.0 ^:qpa5^"
*/ ny278tr Q7
public class HeapSort implements SortUtil.Sort{ nwY2BIB
NnJ>0|74g
/* (non-Javadoc) JCM)N8~i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UN,<6D3\b
*/ -;sJ25(
public void sort(int[] data) { aw%>YrJ
MaxHeap h=new MaxHeap(); "CIpo/ebL
h.init(data); `DI{wqV9
for(int i=0;i h.remove(); u86J.K1Q
System.arraycopy(h.queue,1,data,0,data.length); g ^D)x[
} ;~}-AI-
}9MW!Ss
private static class MaxHeap{ Z|]l"W*w
\B*k_W/r@
void init(int[] data){ #rh0r`
this.queue=new int[data.length+1]; '}wG"0
for(int i=0;i queue[++size]=data; vs5 D:cZ}
fixUp(size); {KW&wsI
} 6$W-?
} &Tf=~6
*raIV]W3
private int size=0; fGu5%T,
6&i[g
private int[] queue; Q{%HW4lg
Q.j-C}a
public int get() { 3m-edpH
return queue[1]; 1h#w"4
} &@mvw=d
1.hOE>A%
public void remove() { +9<,3IJe6
SortUtil.swap(queue,1,size--); 0-8ELX[#
fixDown(1); ~*66 3pA
} `l HKQwu
file://fixdown @)aXNQY
private void fixDown(int k) { (Q}PeKM?jq
int j; H=JP3ID>{
while ((j = k << 1) <= size) { ^%~Et>C
if (j < size %26amp;%26amp; queue[j] j++; 3&.TU5]`-
if (queue[k]>queue[j]) file://不用交换 FiV^n6-F`
break; 6LSPPMM
SortUtil.swap(queue,j,k); \_iH4<#>
k = j; 7VEt4
} Ig40#pA
} [i,5>YIk
private void fixUp(int k) { )a4E&D
while (k > 1) { ,U|u-.~ZU
int j = k >> 1; Z&~k]R0y
if (queue[j]>queue[k]) <[ g$N4
break; x]yHBc
SortUtil.swap(queue,j,k); ')5jllxv
k = j; }e&KO?x+
} ANA2S*r
} X+(aQ >y
S&4w`hdD>~
} GQYtH#
kw*Cr/'*
} '^P*F9
LM'*OtpDG
SortUtil： $5q{vy
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package org.rut.util.algorithm; lB5[#z
S>/I?(J
import org.rut.util.algorithm.support.BubbleSort; +1JZB*W
import org.rut.util.algorithm.support.HeapSort; =$:4v`W0(
import org.rut.util.algorithm.support.ImprovedMergeSort; 30gZ_8C>}
import org.rut.util.algorithm.support.ImprovedQuickSort; h=p-0 Mx .
import org.rut.util.algorithm.support.InsertSort; ^)eessZ
import org.rut.util.algorithm.support.MergeSort; 0ER6cTo-t
import org.rut.util.algorithm.support.QuickSort; 7|{%CckN
import org.rut.util.algorithm.support.SelectionSort; ByB0>G''.
import org.rut.util.algorithm.support.ShellSort; mCEKEX
8KtF<`A)
/** I&Eg-96@
* @author treeroot N#2nH1C
* @since 2006-2-2 '|dKg"Yl
* @version 1.0 &9jUf:gJ0
*/ +e{djp@m
public class SortUtil { 8V53+]c$Y
public final static int INSERT = 1; skmDsZzw
public final static int BUBBLE = 2; P /f ~
public final static int SELECTION = 3; h!JjN$
public final static int SHELL = 4; z=8_%r
public final static int QUICK = 5; X*p:&=o
public final static int IMPROVED_QUICK = 6; #nMP(ShK
public final static int MERGE = 7; hg86#jq%
public final static int IMPROVED_MERGE = 8; |Ls&~'ik
public final static int HEAP = 9; 8WLh]MD`
RY'\mt"W2
public static void sort(int[] data) { ^q4:zZZ
sort(data, IMPROVED_QUICK); j*3sjOoC
} ( .6tz
private static String[] name={ R- ?0k:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %_i0go,^
}; OFPd6,(E
x.yb4i=Jq
private static Sort[] impl=new Sort[]{ Z"+rg9/p
new InsertSort(), .DV#-tUh
new BubbleSort(), R!M|k%(
new SelectionSort(), _UbR8
new ShellSort(), onS{
new QuickSort(), `5~o=g
new ImprovedQuickSort(), 8Vg`;_-
new MergeSort(), OU Yb-
new ImprovedMergeSort(), ggYIq*4
new HeapSort() T_;G))q'
}; DrVbx
F4aJr%!\6S
public static String toString(int algorithm){ Zj /H3,7
return name[algorithm-1]; y(p:)Iv
} "b+3 &i|
9iN!hy[
public static void sort(int[] data, int algorithm) { jy)9EU=
impl[algorithm-1].sort(data); {&JurZ
} }O-%kl
fxf GJNR
public static interface Sort { 5G]#'tu
public void sort(int[] data); {(zL"g46
} G){1`gAhNJ
zqE8PbU0M;
public static void swap(int[] data, int i, int j) { h.+,*9T\
int temp = data; e\bF_ N2VA
data = data[j]; qz_TcU'
data[j] = temp; Y;F,GxR}
} _o=`-iy9
} \2LA%ZU