[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; $%8n,FJ[
} yOzKux8kB
int i1=l; yP]W\W'
int i2=mid+1; R3`W#`
for(int cur=l;cur<=r;cur++){ {;M/J
if(i1==mid+1) iPpJ`i#@+
data[cur]=temp[i2++]; _cN)q
else if(i2>r) (kOv
data[cur]=temp[i1++]; Vn;]''_
else if(temp[i1] data[cur]=temp[i1++]; *tPY
else () ;7+
data[cur]=temp[i2++]; q#-H+7 5
} )p9n|C
} K):sq{
:#jv4N
} .cog9H'
'p]qN;`'O$
改进后的归并排序: 0\*<k`dY
%$?Q%
package org.rut.util.algorithm.support; d's`~HOU2
*3Z#r
import org.rut.util.algorithm.SortUtil; tTp`e0L*m
XhV"<&v
/** O#Hz5A5
* @author treeroot N6%q%7F.:
* @since 2006-2-2 4jro4B`
* @version 1.0 )E2Lf]
*/ &r!>2$B\
public class ImprovedMergeSort implements SortUtil.Sort { (oEA)yc|
H9!*DA<W
private static final int THRESHOLD = 10; boovCW
S@($c'
/* yo6IY
* (non-Javadoc) 7}.(EZ0
* YWFHiB7x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f+AIxSw
*/ 2GS2,
public void sort(int[] data) { "ZW*O{
int[] temp=new int[data.length]; )\G#[Pc7
mergeSort(data,temp,0,data.length-1); t]%R4ymV
} HX*U2<^
CFxs`C^
private void mergeSort(int[] data, int[] temp, int l, int r) { N3RwcM9+;
int i, j, k; - [j0B|cwG
int mid = (l + r) / 2; {v(|_j&:o
if (l == r) kICYPy
return; S3cQC`^
if ((mid - l) >= THRESHOLD) ~zRd||qv
mergeSort(data, temp, l, mid); pl&GFf o
else kk#d-! $[
insertSort(data, l, mid - l + 1); ,1L^#?Q~
if ((r - mid) > THRESHOLD) tjt#VFq?
mergeSort(data, temp, mid + 1, r); m#'9)%t!J
else A79SAheX#
insertSort(data, mid + 1, r - mid); 6V/mR~F1r
6dMpd4"\
for (i = l; i <= mid; i++) { 8+F2 !IM
temp = data; v8N1fuP}
} $hh=-#J8
for (j = 1; j <= r - mid; j++) { -+/|
temp[r - j + 1] = data[j + mid]; t[~i})yS
} h,G$e|[?
int a = temp[l]; IYN`q'%|
int b = temp[r]; "&F/'';0}E
for (i = l, j = r, k = l; k <= r; k++) { ']x]X,
if (a < b) { E;0"1 P|S
data[k] = temp[i++]; rtz(Jt{<
a = temp; F$C:4c
} else { '"a8<7
data[k] = temp[j--]; tvILLR
b = temp[j]; a8TE
} eO#)QoHj^
} a3[aXe
} '/?&Gol-
u"ow?[E
/** 3kg+*]tLx
* @param data Uz_{jAhW]
* @param l L^}kwu#
* @param i wB{-]\H`\
*/ nor`w,2VF
private void insertSort(int[] data, int start, int len) { s!Vtwp9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V,}cDT>
} uIBV1Qz
} lM]7@A
} a*`J]{3G
} $[e*0!e
r@aFB@
堆排序： S7R^%Wck/6
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package org.rut.util.algorithm.support; .H"gH-I
'|.u*M,b
import org.rut.util.algorithm.SortUtil; Zzs pE}
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/** j43HSY7@
* @author treeroot xhv)rhu@
* @since 2006-2-2 ~mU#u\r(*
* @version 1.0 =n!8>8d
*/ klKt^h-
public class HeapSort implements SortUtil.Sort{ Q_S fFsY
3? "GH1e
/* (non-Javadoc) oc.x1<Nd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (RF6K6~
*/ ;(A'XA4 6N
public void sort(int[] data) { 4e4$AB"
MaxHeap h=new MaxHeap(); 4*]`s|fbu
h.init(data); ;lldxS
for(int i=0;i h.remove(); >:Ec
System.arraycopy(h.queue,1,data,0,data.length); -J:vYhq|g
} &o(? }W
%3cBhv[q4
private static class MaxHeap{ gi8kYHldH
}-kb"\X%g
void init(int[] data){ x<].mx
this.queue=new int[data.length+1]; |<S9nZg%p
for(int i=0;i queue[++size]=data; (fl2?d5+C
fixUp(size); rmhB!Lo
} ;X>KP,/r$
} /D~:Ufw
Vs(;al'
private int size=0; f3O3pIA
K>-m8.~\E
private int[] queue; J_tJj8
_h#G-
public int get() { 'RhMzPmY>
return queue[1]; n*V^Qf
} 7@ZL(G
/3fo=7G6
public void remove() { *E>YLkg]
SortUtil.swap(queue,1,size--); [Gu]p&
fixDown(1); =i.[|g"
} GlaWBF#
file://fixdown '#XP:nqFkK
private void fixDown(int k) { &*0V!+#6
int j; WWY9U
while ((j = k << 1) <= size) { F4@h}T5)
if (j < size %26amp;%26amp; queue[j] j++; ][9M_.
if (queue[k]>queue[j]) file://不用交换 nt4>9;
break; +IU]=qS
SortUtil.swap(queue,j,k); (mycUU%
k = j; RNPqW,B!0
} R8axdV9(
} q\ ?6-?Mr
private void fixUp(int k) { GXwV>)!x
while (k > 1) { "C>KKs }
int j = k >> 1; =|6IyL_N
if (queue[j]>queue[k]) 2'++G[z
break; -y~JNDS1]
SortUtil.swap(queue,j,k); }[1I_)
k = j; ,30&VW##
} y|X[NSA
} 4aGHks8Z,\
#fwG~Q(
} Ts^IA67&<
H|Eu,eq-E
} ,5nrovv
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SortUtil： 1=s%.0
]+oPwp;il
package org.rut.util.algorithm; Lz4iLLP
R+5x:mpHy
import org.rut.util.algorithm.support.BubbleSort; ]3%Z
import org.rut.util.algorithm.support.HeapSort; =U?"#
import org.rut.util.algorithm.support.ImprovedMergeSort; K,J:i^2
import org.rut.util.algorithm.support.ImprovedQuickSort; ~;{)S}U@R
import org.rut.util.algorithm.support.InsertSort; \wMr[_LW
import org.rut.util.algorithm.support.MergeSort; H>VuUH|
import org.rut.util.algorithm.support.QuickSort; S\Q/ "Y
import org.rut.util.algorithm.support.SelectionSort; g5H+2lSC
import org.rut.util.algorithm.support.ShellSort; @]~\H-8
"#JRw
/** #T+%$q [:
* @author treeroot iNha<iS+
* @since 2006-2-2 <^M`U>
* @version 1.0 1Azigd0%
*/ l("_JI
public class SortUtil { h!$W^Tm2g
public final static int INSERT = 1; :?&N/7
public final static int BUBBLE = 2; 7D4P=$UJp
public final static int SELECTION = 3; }F-WOQ
public final static int SHELL = 4; /QG8\wXE2
public final static int QUICK = 5; Mk7#qiPo
public final static int IMPROVED_QUICK = 6; m(?M]CH(A
public final static int MERGE = 7; ,1od]]>(O
public final static int IMPROVED_MERGE = 8; 1Ocyrn
public final static int HEAP = 9; 5gi`&t`
Wh"oL;O
public static void sort(int[] data) { !\CoJ.5=
sort(data, IMPROVED_QUICK); ^;N+"oq!y
} C^.:{
private static String[] name={ R5qC;_0cV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "GgK,d}%
}; $/6.4"j
n pBpYtG
private static Sort[] impl=new Sort[]{ dqnxhN+&
new InsertSort(), eEXer>Rm
new BubbleSort(), Q[S""P.Z|
new SelectionSort(), ><dSwwu
new ShellSort(), EI]NOG 0
new QuickSort(), ']>@vo4kK{
new ImprovedQuickSort(), JhIgqW2
new MergeSort(), |G{TA
new ImprovedMergeSort(), kE=}.
new HeapSort() ^b'|`R+~}
}; G!@tW`HO
GYZzWN}U
public static String toString(int algorithm){ (@~d9PvB>
return name[algorithm-1]; !XQG1!|ww
} 2BEF8o]Np
crUt8L-B4
public static void sort(int[] data, int algorithm) { In5'(UHW:
impl[algorithm-1].sort(data); lQY?!oj&q
} 5nQ*%u\$Z
@MS;qoc
public static interface Sort { V`=#j[gX)=
public void sort(int[] data); h]&8hl_'m
} xn}sh[<:P
Av]<[ F/
public static void swap(int[] data, int i, int j) { \2@OS6LUe
int temp = data; IZoa7S&t
data = data[j]; \5cAOBja
data[j] = temp; ._Wm%'uX
} 3w#kvtDVm
} +-1t]`9k4