[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; 2=K|kp5
} sHBTB6)lx
int i1=l; hE=xS:6
int i2=mid+1; 3^wHL:u
for(int cur=l;cur<=r;cur++){ =Y|( }92
if(i1==mid+1) C=&n1/
data[cur]=temp[i2++]; $<)]~**K
else if(i2>r) hq{{XQ
data[cur]=temp[i1++]; zL+t&P[\
else if(temp[i1] data[cur]=temp[i1++]; Ip7#${f5M
else "!vY{9,
data[cur]=temp[i2++]; .E^w, o
} 80Hi v
} g!_#$az3
%JSRC<,a
} O(%6/r`L,k
3\P*"65
改进后的归并排序: Gf#l ^yr
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package org.rut.util.algorithm.support; pEcYfj3M
2C:u)}R7D
import org.rut.util.algorithm.SortUtil; Zx{Sxv"
\`~YW<D
/** ]3,9."^
* @author treeroot {~9HJDcM
* @since 2006-2-2 (OES~G
* @version 1.0 [8Y7Q5Had
*/ |Y}YhUI&
public class ImprovedMergeSort implements SortUtil.Sort { r@r*|50
<FBH;}]
private static final int THRESHOLD = 10; Fl($0}ER
o[KZm17
/* QpQ2hNf
* (non-Javadoc) ~xY"P)(x;
* zOSUYn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &'k(v(>n,
*/ B6&[_cht
public void sort(int[] data) { ~x9J&*zxM
int[] temp=new int[data.length]; [N~7PNdS
mergeSort(data,temp,0,data.length-1); #'KM$l,P
} `qmwAT
h9m|f|cH
private void mergeSort(int[] data, int[] temp, int l, int r) { iB W:t
int i, j, k; %>+lr%B
int mid = (l + r) / 2; c.LRS$o/j
if (l == r) /dg?6XT/
return; | WJ]7C
if ((mid - l) >= THRESHOLD) \PT!mbB?
mergeSort(data, temp, l, mid); g)Hsd0
else .?3roQ
insertSort(data, l, mid - l + 1); x*F-d2D
if ((r - mid) > THRESHOLD) Mx,5
mergeSort(data, temp, mid + 1, r); 7Dssr [
else Eu&$Rq}
insertSort(data, mid + 1, r - mid); ) q'D9x9
'+$r7?dKP
for (i = l; i <= mid; i++) { p2l@6\m\
temp = data; Ih5Y7<8b~
} %Bm{ctf#)
for (j = 1; j <= r - mid; j++) { k]:`<`/I_
temp[r - j + 1] = data[j + mid]; ".|8(Y
} a"xRc
int a = temp[l]; 3,G|oR{D
int b = temp[r]; yw+]S
for (i = l, j = r, k = l; k <= r; k++) { 7Z:HwZ
if (a < b) { ~b#<HG\,,
data[k] = temp[i++]; t*Ro2QZ
a = temp; f2gh|p`
} else { rz|Sjtq
data[k] = temp[j--]; 'qiAmaX
b = temp[j]; PtUS7[]
} a'Cny((
} $H3C/|
} dkEbP*yXg
xzY/$?
/** y_[VhZ%
* @param data ={cM6F}a@
* @param l CZ]Dm4
* @param i mB0`>?#i
*/ R&t2
private void insertSort(int[] data, int start, int len) { <75x@!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uy"i3xD6-
} 9:RV5Dt
} @6DKw;Q
} rC|nE=i
} Ag:/iB]
rusM]Z
堆排序： +|S)Mm8-
BR@gJ(2
package org.rut.util.algorithm.support; LC=M{\
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import org.rut.util.algorithm.SortUtil; 3`SH-"{j%
%jj-\Gz!
/** o-_,l J7o^
* @author treeroot *$VeR(QN
* @since 2006-2-2 '.pGkXyQ
* @version 1.0 +ah4 K(+3
*/ 3C=QWw?
public class HeapSort implements SortUtil.Sort{ R$}Hv
D8w.r"ne
/* (non-Javadoc) ?\4kV*/Cqz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $Nvox<d0
*/ )2W7>PY
public void sort(int[] data) { -u~:Gd*l0
MaxHeap h=new MaxHeap(); ?S=y>b9R
h.init(data); dmkGIg}
for(int i=0;i h.remove(); I31Nu{
System.arraycopy(h.queue,1,data,0,data.length); d/oD]aAEr
} h8.(Q`tli
0nI*9
private static class MaxHeap{ `3[W~Cq
py~[M'p(H
void init(int[] data){ f9_Pn'"I
this.queue=new int[data.length+1]; A`vRUl,c=
for(int i=0;i queue[++size]=data; mg70%=qM0f
fixUp(size); j4@6`[n:
} rFC9y o
} .u7grC C
v%`k*n':
private int size=0; jsV1~1:83
*}HDq(/>w
private int[] queue; F@t\D?
B[w.8e5
public int get() { h }&dvd
return queue[1]; WQw11uMt@q
} r#ADxqkaV
qS}{O0
public void remove() { 1$}Tn
SortUtil.swap(queue,1,size--); ]x& R=)P
fixDown(1); \mb@-kM)
} ;/23CFYM
file://fixdown }|=Fnyj
private void fixDown(int k) { K43`$
int j; S9b=?? M)
while ((j = k << 1) <= size) { rwwyYIlEg
if (j < size %26amp;%26amp; queue[j] j++; a&mL Dh/
if (queue[k]>queue[j]) file://不用交换 [UdJ(cGf
break; t]3:vp5N]
SortUtil.swap(queue,j,k); 3,#qt}8`
k = j; S>HfyZ&Pc
} }{J>kgr6
} fWg3gRI
private void fixUp(int k) { 7S=]@*
while (k > 1) { [ryII hQ
int j = k >> 1; E'+z.~+
if (queue[j]>queue[k]) %AT/g&M&1#
break; VD,g3B p
SortUtil.swap(queue,j,k); -yIx:*KI
k = j; n]l3 )u
} ;L],i<F
} Y?oeP^V'u
2I=4l
} )h(=X&(d
8-L -W[
} /^si(BuC^*
p4uObK,
SortUtil： 2B6y1"B
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package org.rut.util.algorithm; 7|ACJv6%9
V2m= m}HQ
import org.rut.util.algorithm.support.BubbleSort; .)t*!$5=N
import org.rut.util.algorithm.support.HeapSort; (LVzE_`
import org.rut.util.algorithm.support.ImprovedMergeSort; ,4,./wIq
import org.rut.util.algorithm.support.ImprovedQuickSort; 33"!K>wC
import org.rut.util.algorithm.support.InsertSort; =ZV+*cCC=q
import org.rut.util.algorithm.support.MergeSort; dt=M#+g
import org.rut.util.algorithm.support.QuickSort; lH,/N4r*&
import org.rut.util.algorithm.support.SelectionSort; [m<8SOMG(
import org.rut.util.algorithm.support.ShellSort; C1YH\X(r
^m.%FIwR
/** HXB& 6
* @author treeroot Ni;jMc
* @since 2006-2-2 EUPc+D3
* @version 1.0 e/)Vx'd`+
*/ oSR;Im<2
public class SortUtil { sw(|EZ7F
public final static int INSERT = 1; c/-'^+9
public final static int BUBBLE = 2; r/+~4W5
public final static int SELECTION = 3; );p:[=$71
public final static int SHELL = 4; @&Af[X4s
public final static int QUICK = 5; a8y*Jz-E
public final static int IMPROVED_QUICK = 6; i Hcy,PBD
public final static int MERGE = 7; 5cr\ JR
public final static int IMPROVED_MERGE = 8; 1R.6Xer
public final static int HEAP = 9; @zsqjm
_^0UK|[
public static void sort(int[] data) { y&F&Z3t
sort(data, IMPROVED_QUICK); PC?XE8o
} DnB :~&Dw
private static String[] name={ Qyj:!-o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0bQ"s*K
}; @7?L+.r$9
nG| NRp
private static Sort[] impl=new Sort[]{ |)ALJJ=+
new InsertSort(), 3qp\jh=FE
new BubbleSort(), ^7`gf
new SelectionSort(), vri<R8
new ShellSort(), ?j8_j
new QuickSort(), YipL_&-
new ImprovedQuickSort(), phcYQqR
new MergeSort(), {%Q+Pzl.
new ImprovedMergeSort(), 7a%)/)<D
new HeapSort() / \k\HK8
}; u-wj\BU
^K'XlM`a
public static String toString(int algorithm){ #/>OW2Ny
return name[algorithm-1]; 2J6(TrQ
} s%l^zA(
#ChF{mh
public static void sort(int[] data, int algorithm) { q+9c81b
impl[algorithm-1].sort(data); (;nh?"5
} Bh q]h
eC$ Jdf
public static interface Sort { b;G#MjQp'
public void sort(int[] data); 3gs7Xj%N
} p<(b^{EX
JjH141 n%D
public static void swap(int[] data, int i, int j) { &UX:KW`=
int temp = data; \2 `|eo
data = data[j]; gCI{g.[I!
data[j] = temp; h}GzQry1
} Up1e4mNL
} /V>yF&p