[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; hJsC \C,^
} 4 G[hU4L
int i1=l; Y;Gm,
int i2=mid+1; ASw|sw
for(int cur=l;cur<=r;cur++){ Zd ,=
if(i1==mid+1) 0)V-|v`
data[cur]=temp[i2++]; {2^@jD
else if(i2>r) 3H2;mqq
data[cur]=temp[i1++]; "lf3hWGw
else if(temp[i1] data[cur]=temp[i1++]; jqWvLBU!
else ^6>|!
data[cur]=temp[i2++]; ~+yo;[1Yc
} GTl(i*
} d A{Jk
T(^8ki
} wlg#c6#q
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改进后的归并排序: )fc"])&8
yW?%c#9D
package org.rut.util.algorithm.support; T l(uqY?9
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import org.rut.util.algorithm.SortUtil; &Ld8Z9IeFp
M) XQi/
/** #/<Y!qV&
* @author treeroot PSS/JFZ^
* @since 2006-2-2 , vyx`wDd
* @version 1.0 D(U3zXdO
*/ Ilb |:x"L
public class ImprovedMergeSort implements SortUtil.Sort { Fjt,
\'Kj.EO{?$
private static final int THRESHOLD = 10; $#3<rcOq
ya g
/* MWh+h7k'
* (non-Javadoc) qXhf?x
* l>Ja[`X@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y4rJ-
*/ ':)j@O3-
public void sort(int[] data) { 5G;^OI!g
int[] temp=new int[data.length]; "0zXpQi,B
mergeSort(data,temp,0,data.length-1); 6D"`FPC
} (Gc`3jJ
Ia:puks=
private void mergeSort(int[] data, int[] temp, int l, int r) { mIEaWE;E"
int i, j, k; _J~ta.
int mid = (l + r) / 2; ik0Q^^1?Y
if (l == r) ULmdt
return; M;V#Gm
if ((mid - l) >= THRESHOLD) s^'#"`!v=
mergeSort(data, temp, l, mid); )wv[!cYyW
else bu]Se6%}
insertSort(data, l, mid - l + 1); 1'm`SRX#e
if ((r - mid) > THRESHOLD) LE80`t>M#
mergeSort(data, temp, mid + 1, r); !nBm}E7d
else )60f
insertSort(data, mid + 1, r - mid); aDvO(C
hs_|nr0;[
for (i = l; i <= mid; i++) { 5>[sCl-
temp = data; @^6OV)
} C|IQM4
for (j = 1; j <= r - mid; j++) { 4$DliP
temp[r - j + 1] = data[j + mid]; =k<4mlok^
} #s R0*
int a = temp[l]; A6y~_dt
int b = temp[r]; {^5<{j3e
for (i = l, j = r, k = l; k <= r; k++) { )k] !u
if (a < b) { V3~a!k
data[k] = temp[i++]; 8421-c6y>
a = temp; B "F`OS[
} else { ^O Xr: P
data[k] = temp[j--]; JKi@Kw
b = temp[j]; s5aOAyb*w
} (VPM>ndkw
} K(KP3Q
} 5J\|gZQF
;@YF}%!+W
/** /Q>{YsRRB
* @param data 3/IWO4?_
* @param l dzE Q$u/I
* @param i ?$@KwA
*/ m-S33PG{
private void insertSort(int[] data, int start, int len) { &G|jzXE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xnuv4Z}]t
} mc=!X
} .Jat^iFj0
} Q()RO*9
} QDgEJ%U-
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堆排序： (6#yw`\
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package org.rut.util.algorithm.support; X)iWb(@k"7
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import org.rut.util.algorithm.SortUtil; &Bz7fKCo
V_A,d8=lt
/** VfA5r`^
* @author treeroot t6g)3F7T
* @since 2006-2-2 wH_n$w
* @version 1.0 iraRB~
*/ -=t3O#
public class HeapSort implements SortUtil.Sort{ )\D40,p
[T[9*6Kt
/* (non-Javadoc) PVS<QN%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vXM/nw|5
*/ @wdB%
public void sort(int[] data) { Sd<@X@iU8D
MaxHeap h=new MaxHeap(); JfP\7
h.init(data); :OQ:@Yk
for(int i=0;i h.remove(); c<h!QnJ
System.arraycopy(h.queue,1,data,0,data.length); p-'6_\F.Ke
} 51ajE2+X&
HLoQ}oK|K
private static class MaxHeap{ 01{r^ZT`RH
|N=@E,33
void init(int[] data){ Vyt~OTI\
this.queue=new int[data.length+1]; e9Ul A
for(int i=0;i queue[++size]=data; VkTlPmr
fixUp(size); bhqq
} igj={==m
} Q+!0)pG5#
v<7Gln
private int size=0; +>!B(j\gx
`J=1&ae{
private int[] queue; MCi`TXr
eb.cq"C
public int get() { x'@32gv
return queue[1]; `Ge+(1x
} JwI`"$>w
NO+ 55n
public void remove() { b,rH&+2H
SortUtil.swap(queue,1,size--); /J[H5uA
fixDown(1); iO9nvM<
} vlPl(F1
file://fixdown I| W'n-4Y
private void fixDown(int k) { hSkc9jBF
int j; I NPYJ#%
while ((j = k << 1) <= size) { |YE,) kiF
if (j < size %26amp;%26amp; queue[j] j++; #j^('K|
if (queue[k]>queue[j]) file://不用交换 CCW%G,$U9
break; ib(>vp$V
SortUtil.swap(queue,j,k); &PRx,G5
k = j; Y3P.|
} uOG-IHuF
} 8NaL{j1`
private void fixUp(int k) { X/E7o92\
while (k > 1) { [:nx);\
int j = k >> 1; m1hW<
if (queue[j]>queue[k]) |-(IJG#)
break; yV J dZI
SortUtil.swap(queue,j,k); pwFU2}I
k = j; 2/yXY_L
} /B,:<&_-
} (2 T#/$
yHWi[7$
} KMK&[E#r
I #M%%5e
} "K|)<6J
@,x_i8
SortUtil： 6%gB E
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package org.rut.util.algorithm; hncS_ZA
Pv/Pww\
import org.rut.util.algorithm.support.BubbleSort; )|w*/JK\Z
import org.rut.util.algorithm.support.HeapSort; 4AY _#f5u
import org.rut.util.algorithm.support.ImprovedMergeSort; *<*0".#
import org.rut.util.algorithm.support.ImprovedQuickSort; & Fg|%,fv]
import org.rut.util.algorithm.support.InsertSort; -,~;qSs
import org.rut.util.algorithm.support.MergeSort; %s$rP
import org.rut.util.algorithm.support.QuickSort; w~kHQ%A
import org.rut.util.algorithm.support.SelectionSort; zH)cU%I@.
import org.rut.util.algorithm.support.ShellSort; ~9JW#HHzn
|'V DI]p&
/** O!+nF]V4f
* @author treeroot ~lzdbX
* @since 2006-2-2 lQV|U;~D
* @version 1.0 _ yfdj[Ot`
*/ X5uS>V%/
public class SortUtil { AVXX\n\_
public final static int INSERT = 1; `y\*m]:
public final static int BUBBLE = 2; ds*m6#1b
public final static int SELECTION = 3; O^.%C`*
public final static int SHELL = 4; Xh.+pJl,*
public final static int QUICK = 5; $uEJn&n7}
public final static int IMPROVED_QUICK = 6; Xw7{R
public final static int MERGE = 7; PUbaS{J7
public final static int IMPROVED_MERGE = 8; ''#p47$8<d
public final static int HEAP = 9; Yv)Bj
yWj9EHQU[
public static void sort(int[] data) { 5/& 1Oxo
sort(data, IMPROVED_QUICK); )Vwj9WD
} S5i+vUI8C
private static String[] name={ nK+lE0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %&^Q(f
}; R<f#r03@|
1&"-*)
private static Sort[] impl=new Sort[]{ %ZujCZn
new InsertSort(), _9D|u<D
new BubbleSort(), 9pWi.J
new SelectionSort(), #F_'}?09%
new ShellSort(), FE/$(7rM
new QuickSort(), zuUT S[
new ImprovedQuickSort(), i]it5
new MergeSort(), <=q*N;=T,
new ImprovedMergeSort(), puFXPw.3
new HeapSort() j((hqJr
}; MV%Xhfk
n!GWqle
public static String toString(int algorithm){ "XCU'_k=
return name[algorithm-1]; }qer
} rmOQ{2}
h^}_YaT\
public static void sort(int[] data, int algorithm) { BjM+0[HC
impl[algorithm-1].sort(data); }o-|8P:Y
} `vudS?
+'-rTi\
public static interface Sort { Rr%tbt.sE
public void sort(int[] data); S8\+XJ
} aK]7vp+
E@:Q 'g%
public static void swap(int[] data, int i, int j) { TbOJp
int temp = data; [}z?1Gj;W(
data = data[j]; IuNkfBe4m
data[j] = temp; ]Z_$'?f
} l;Q >b]DZ
} ylk{!