[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; y)kxR
} >Kgw2,y+
int i1=l; q,v<:sS9T
int i2=mid+1; $6"sRI6u
for(int cur=l;cur<=r;cur++){ 9A|A@E#
if(i1==mid+1) /=2aD5r
data[cur]=temp[i2++]; jAJ='|[X\
else if(i2>r) zB.cOMx
data[cur]=temp[i1++]; LV}R 9f
else if(temp[i1] data[cur]=temp[i1++]; fA=Z):w
else 9QQ XB-
data[cur]=temp[i2++]; Xv1vq -cM
} m*^)#
} zt.kNb
OqtGKda
} ^*.[b
Ai/X*y:[?
改进后的归并排序: (j}7|*.
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package org.rut.util.algorithm.support; j>8DaEfwx
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import org.rut.util.algorithm.SortUtil; )uqzu%T
rPH7 ]]
/** i>M%)HN
* @author treeroot =\Q<TY
* @since 2006-2-2 ~${~To8$CW
* @version 1.0 OG$n C
*/ "'4
public class ImprovedMergeSort implements SortUtil.Sort { j6%W+;{/pj
Q-x>yau"
private static final int THRESHOLD = 10; #XQ/y}(
^s~)"2 g
/* "GMU~594
* (non-Javadoc) ZP";B^J
* <83Ky;ry
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~ l}f@@u
*/ !y_FbJ8KC
public void sort(int[] data) { gP_N|LuF"
int[] temp=new int[data.length]; : (UK'i
mergeSort(data,temp,0,data.length-1); tN#C.M7.'7
} L0w6K0J4
/@:X0}L
private void mergeSort(int[] data, int[] temp, int l, int r) { >n7h%c
int i, j, k; P2n8HFi
int mid = (l + r) / 2; cSL6V2F
if (l == r) *\ii+f-
return; !}Xoqamm
if ((mid - l) >= THRESHOLD) Snr(<u
mergeSort(data, temp, l, mid); l";Yw]:^
else f' A$':Y
insertSort(data, l, mid - l + 1); fHiL%]z
if ((r - mid) > THRESHOLD) ElO|6kOBYG
mergeSort(data, temp, mid + 1, r); ^4=#,K
else rKgl:sj+
insertSort(data, mid + 1, r - mid); [O3:?BNY
9NTNulD>P
for (i = l; i <= mid; i++) { ni;)6,i
temp = data; n)yDep]$G
} M?l v
for (j = 1; j <= r - mid; j++) { bjVk9XvH6
temp[r - j + 1] = data[j + mid]; v3"6'.f;bY
} "Enb
int a = temp[l]; 4cQP+n
int b = temp[r]; KV0*dB;
for (i = l, j = r, k = l; k <= r; k++) { k^ <]:B
if (a < b) { !wp1Df[
data[k] = temp[i++]; =$OGHc
a = temp; suEK;Bk9
} else { bM?gAY]mB8
data[k] = temp[j--]; 7O1MC 8{
b = temp[j]; '$FF/|{
} ]SJ#:7
} XG|N$~N+2
} } =OE.cf@
Kx9u|fp5
/** E2DfG^sGV
* @param data YR'F]FI
* @param l ]:e_Y,@
* @param i izP)t
*/ C0N :z.)4
private void insertSort(int[] data, int start, int len) { L:HvrB~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (zsG!v
} s{b\\$Rb
} Jc":zR@5
} O9daeIF0#
} GDSV:]hL
}=X: F1S
堆排序： Q6m8N
q|*^{(tWs
package org.rut.util.algorithm.support; 3(e_2v
[9sEc
import org.rut.util.algorithm.SortUtil; 0AHQ(+Ap
tV!?Ol
/** t:2DB)
* @author treeroot $udhTI#,
* @since 2006-2-2 v,i|:;G
* @version 1.0 4jXo5SkEJ
*/ & /8Tth86
public class HeapSort implements SortUtil.Sort{ gqS9{K(f
0+SDFh
/* (non-Javadoc) tWn dAM(U7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a&>NuMDI
*/ QIiy\E%
public void sort(int[] data) { SnE^\I^O
MaxHeap h=new MaxHeap(); ?^voA.Bv<
h.init(data); d,GOP_N8I
for(int i=0;i h.remove(); "3^tVX%$\[
System.arraycopy(h.queue,1,data,0,data.length); 9FDu{4:
} vRe{B7}p;
F! =l r
private static class MaxHeap{ lpG%rN!
^/BGOBK
void init(int[] data){ ",,#q
this.queue=new int[data.length+1]; Mj;V.Y
for(int i=0;i queue[++size]=data; m*m),mZ"
fixUp(size); -,bnj^L
} uw\@~ ,d
} %u!=<yn'
xr'1CP
private int size=0; [6a-d>e{
l!*_[r
private int[] queue; +gd5&
Ef]Hpjvp
public int get() { 3en9TB
return queue[1]; mG S4W;
} :|;@FkQ
coAXYn
public void remove() { i}vJI}S.$
SortUtil.swap(queue,1,size--); n#+EG3
fixDown(1); FJeh=\
} @jn&Wf?
file://fixdown nL 5tHz:e
private void fixDown(int k) { BAQ-1kSz
int j; -PV1x1|
while ((j = k << 1) <= size) { x*Z'i<;B
if (j < size %26amp;%26amp; queue[j] j++; )9H5'Wh#
if (queue[k]>queue[j]) file://不用交换 dk&e EDvfd
break; z>N[veX%
SortUtil.swap(queue,j,k); Om*QN]lGq
k = j; CY o m
} ILm+o$o~
} (H_dZL
private void fixUp(int k) { V|u2(*
while (k > 1) { uo`R
int j = k >> 1; yX!u&
if (queue[j]>queue[k]) I/7!5Z*
break; t^'nh 1=
SortUtil.swap(queue,j,k); F'XQoZ* 1
k = j; M">v4f&K1!
} jz8u'y[n7
} cUq]PC$|
8R*;8y_
} -m@c{&r
Qxz[
} h /
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SortUtil： w*`:v$
z_>~=Mm
package org.rut.util.algorithm; |2do8z
tz):$1X_
import org.rut.util.algorithm.support.BubbleSort; ZeV@ X
import org.rut.util.algorithm.support.HeapSort; S"!6]!~^
import org.rut.util.algorithm.support.ImprovedMergeSort; ZN8j})lE
import org.rut.util.algorithm.support.ImprovedQuickSort; # `=Zc7gf
import org.rut.util.algorithm.support.InsertSort; `4*I1WZW
import org.rut.util.algorithm.support.MergeSort; b~zSsws.
import org.rut.util.algorithm.support.QuickSort; 'OnfU{Ai
import org.rut.util.algorithm.support.SelectionSort; S#]]h/
import org.rut.util.algorithm.support.ShellSort; ]q"&V\b
hF$`=hE,F~
/** .{ v$;g
* @author treeroot SXw r$)4_
* @since 2006-2-2 k3bQ32()
* @version 1.0 =7V4{|ESfy
*/ SrKitSG
public class SortUtil { uq3pk3 )W9
public final static int INSERT = 1; #}#m\=0
public final static int BUBBLE = 2; ob>)F^.iS
public final static int SELECTION = 3; eB~\~@
public final static int SHELL = 4; u 8o!
public final static int QUICK = 5; JwMRquQv
public final static int IMPROVED_QUICK = 6; @V:K]M 5
public final static int MERGE = 7; Aits<0
public final static int IMPROVED_MERGE = 8; h@`Rk
public final static int HEAP = 9; O=A R`r#u
g}%ODa !H
public static void sort(int[] data) { ;7\Fx8"s[
sort(data, IMPROVED_QUICK); h8(#\E
} ZuGSRGX'
private static String[] name={ KZ2[.[(Ph
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3A,N1OXG
}; WRZpu95v
_s;y0$O
private static Sort[] impl=new Sort[]{ Q# hRnM
new InsertSort(), 6Rfv3
new BubbleSort(), !` 1h *}
new SelectionSort(), eV"%(<{
new ShellSort(), Ke4oLF2
new QuickSort(), 7RT{RE
new ImprovedQuickSort(), wm@j(h4
new MergeSort(), Onx6Fy]L
new ImprovedMergeSort(), 3#t9pI4
new HeapSort() $$ND]qM$M
}; #ksDU
$^Xxn.B9
public static String toString(int algorithm){ ~);4O8~.
return name[algorithm-1]; ~DD _n
} "]"0d[d
kZF]BPh.
public static void sort(int[] data, int algorithm) { \oPe"k=
impl[algorithm-1].sort(data); _4>DuklH,
} ;"&?Okz
br=e+]C Y)
public static interface Sort { !sX$?P%U
public void sort(int[] data); jnqp" Ult>
} LGL;3EI
k*A(7qQA`4
public static void swap(int[] data, int i, int j) { @_`r*Tb)dM
int temp = data; uL)MbM]
data = data[j]; im*sSz 0 (
data[j] = temp; \>S.nW
} PSc=k0D
} $R}C(k ;?