[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; YQj2
} HTX?,C_
int i1=l; Brf5dT49
int i2=mid+1; PoG-Rqe
for(int cur=l;cur<=r;cur++){ 6WXRP;!Q
if(i1==mid+1) CxwoBuG=?
data[cur]=temp[i2++]; `erV$( M
else if(i2>r) Y^$X*U/q%U
data[cur]=temp[i1++]; Y 0d<~*
else if(temp[i1] data[cur]=temp[i1++]; DH\0z[
else ~?dNd
data[cur]=temp[i2++]; #h` V>;
} wl#@lOv-P
} ,$s8GAmq
n\*!CXc
} |)(VsVG&
Egg=yF>T
改进后的归并排序: X=5xh
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package org.rut.util.algorithm.support; }fb#G<3
+BETF;0D
import org.rut.util.algorithm.SortUtil; TQpfQ
dfKF%27
/** ,!#*GZ.ix
* @author treeroot C~2F9Pg
* @since 2006-2-2 jB%lB1Q|
* @version 1.0 n<O}hM ZT
*/ 2bw_IT
public class ImprovedMergeSort implements SortUtil.Sort { }$SavB#SBP
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private static final int THRESHOLD = 10; ,,%i;
gQ Fjr_IS#
/* 7%Gwc?[x
* (non-Javadoc) Xg|B \\
* J:CXW%\ <q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K1 EynU I
*/ I>]oS(GNT
public void sort(int[] data) { [>8}J"
int[] temp=new int[data.length]; k/#&qC>]
mergeSort(data,temp,0,data.length-1); _(%d(E2?
} <D<4BnZ(
CZud& <
private void mergeSort(int[] data, int[] temp, int l, int r) { 7}f}$1
int i, j, k; 2Rw&C6("w
int mid = (l + r) / 2; TC!Yb_H}gN
if (l == r) ORe(]I`Z
return; WA)yfo0A
if ((mid - l) >= THRESHOLD) l?Udn0F
mergeSort(data, temp, l, mid); ^1iSn)&
else JEXy%hl
insertSort(data, l, mid - l + 1); l=S35og
if ((r - mid) > THRESHOLD) e6@=wnoX u
mergeSort(data, temp, mid + 1, r); re/@D@%
else Uc7mOa}4
insertSort(data, mid + 1, r - mid); Ktb\ bw
xST8|H
for (i = l; i <= mid; i++) { 5D\f8L
temp = data; ?pr9f5
} IUE~_7
for (j = 1; j <= r - mid; j++) { j9eTCJqB
temp[r - j + 1] = data[j + mid]; -+(jq>t
} [#-b8Cu
int a = temp[l]; @L<*9sLWh
int b = temp[r]; 7Ri46Tkt
for (i = l, j = r, k = l; k <= r; k++) { v- T$:cL
if (a < b) { ;X?}x%$
data[k] = temp[i++]; 1"zDin!A
a = temp; _4"mAPt
} else { }Lc-7[/
data[k] = temp[j--]; nzd2zY>V
b = temp[j]; Wk~WOzr}^
} 0h#lJS*
} UK595n;P
} _"?.!
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/** Gw>^[dmt!
* @param data FQu8vwV6>
* @param l )Xk0VDNp$/
* @param i 7C,&*Ax,9
*/ O@u?h9?cf>
private void insertSort(int[] data, int start, int len) { ]op}y0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $7O}S.x
} t[ubn+
} QS%%^+E2
} nygbt<;?
} K&vF0*gN3
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堆排序： RN$1bxY
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package org.rut.util.algorithm.support; x'+T/zw
|jI#"LbF
import org.rut.util.algorithm.SortUtil; 3LAIl913
mw_~*Nc'9
/** 5's87Z;6
* @author treeroot XC4X-j3
* @since 2006-2-2 l)G^cSHF.3
* @version 1.0 >p)MawT]
*/ l1T m`7}
public class HeapSort implements SortUtil.Sort{ g[1gF&
F~T]u2qt
/* (non-Javadoc) }Mstjm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S{]x
*/ SX<` {x&L
public void sort(int[] data) { iP =V8g?L
MaxHeap h=new MaxHeap(); d74d/l1*{
h.init(data); 2)G %)'
for(int i=0;i h.remove(); -e_hrCW&9
System.arraycopy(h.queue,1,data,0,data.length); 3kw,(-'1
} f[@77m*
XG}C+;4Aw
private static class MaxHeap{ z_F-T=_
kStnb?nk
void init(int[] data){ 5Sm}nH
this.queue=new int[data.length+1]; a][f
for(int i=0;i queue[++size]=data; G9Y#kBr
fixUp(size); .X@FXx&
} )Ub_@)X3%l
} kh {p%<r{
4]yOF_8h
private int size=0; DnC{YK
E)TN,@%
private int[] queue; 6VS4y-N
n,jKmA
public int get() { hlV=qfc
return queue[1]; igkYX!0#8O
} Wi*.TWz3
Gr7=:+0n|P
public void remove() { e5*ni/P
SortUtil.swap(queue,1,size--); S]bmS6#
fixDown(1); -K q5i
} \#f<!R4
file://fixdown a6D &/8
private void fixDown(int k) { /35R u}c
int j; 4i6q{BeHn
while ((j = k << 1) <= size) { p~SClaR3H
if (j < size %26amp;%26amp; queue[j] j++; wfNk=)^$
if (queue[k]>queue[j]) file://不用交换 RP~|PtLw_
break; tmv&U;0Z
SortUtil.swap(queue,j,k); Fpm|_f7
k = j; y`\@N"Cf
} fa++MNf}3
} Ir {OheJ
private void fixUp(int k) { Xnz3p"
while (k > 1) { 6hlc1?
int j = k >> 1; oI=fx Sjd
if (queue[j]>queue[k]) ukIQr/k
break; OjFLPGRCh
SortUtil.swap(queue,j,k); v>$'iT~l
k = j; +aJ>rR
} x.f]1S7h[
} R%{a1r>9h
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} 19HM])Zw\
f({Ei`|
} [NaN>BZ?
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SortUtil： (MR_^t
zfc'=ODX
package org.rut.util.algorithm; eIz<)-7:
:ctu5{"UJ
import org.rut.util.algorithm.support.BubbleSort; _oHNkKQ
import org.rut.util.algorithm.support.HeapSort; Yn@lr6s
import org.rut.util.algorithm.support.ImprovedMergeSort; :K-~fA%kt?
import org.rut.util.algorithm.support.ImprovedQuickSort; fuWO*
import org.rut.util.algorithm.support.InsertSort; W yB3ls~
import org.rut.util.algorithm.support.MergeSort; S#MZV@nGF
import org.rut.util.algorithm.support.QuickSort; PMNjn9d
import org.rut.util.algorithm.support.SelectionSort; M!/Cknm
import org.rut.util.algorithm.support.ShellSort; ]!I7Y.w6
{ vKLAxc
/** n&"B0ycF
* @author treeroot ]b\yg2
* @since 2006-2-2 q?4p)@#
* @version 1.0 M[mF8Zf
*/ %e-7ubW
public class SortUtil { /JHc!D
public final static int INSERT = 1; J&M o%"[)
public final static int BUBBLE = 2; e8pG"`wM8
public final static int SELECTION = 3; F ~^Jmp7Y
public final static int SHELL = 4; qyF{f8pzq
public final static int QUICK = 5; luo
public final static int IMPROVED_QUICK = 6; '^No)n\`
public final static int MERGE = 7; ]~aF2LJ_q
public final static int IMPROVED_MERGE = 8; 8vMG5#U[
public final static int HEAP = 9; <J`0mVOX
g'H$R~ag
public static void sort(int[] data) { G_0( |%
sort(data, IMPROVED_QUICK); cl]Mi "3_
} ;nodjbr,j
private static String[] name={ tKuVQH~D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s$cK(S#
}; "t(p&;d
znxnL,-
private static Sort[] impl=new Sort[]{ t"= E^r
new InsertSort(), 2nSSFx r
new BubbleSort(), mVVD!
new SelectionSort(), +3BBQ+x!
new ShellSort(), 8zRP(+&W
new QuickSort(), sejg&8
new ImprovedQuickSort(), )/pU.Z/
new MergeSort(), *:Vq:IU[D
new ImprovedMergeSort(), 0s/w,?
new HeapSort() 0\[Chja
}; E^.nc~
^Pbk#|$rU
public static String toString(int algorithm){ OR%'K2C6S
return name[algorithm-1]; U%<koD[,
} Y~L2
}s(N6a&(
public static void sort(int[] data, int algorithm) { ~\Hc,5G
impl[algorithm-1].sort(data); aMtsmL?=
} JT3-AAi[Z
Pb1*\+
public static interface Sort { VFRi1\G
public void sort(int[] data); H@q?v+2
} U*22h` S
ujlY!-GM
public static void swap(int[] data, int i, int j) { @JD;k>
int temp = data; QR%mj*@Wle
data = data[j]; 2w["aVr =
data[j] = temp; \.-}adKg
} Nv(9N-9r
} -I&m:A$4*