[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; :/szA?:W
} f'(F'TE
int i1=l; 3'`&D/n
int i2=mid+1; Y$n+\K
for(int cur=l;cur<=r;cur++){ r,0D I
if(i1==mid+1) %aK[Yvo6
data[cur]=temp[i2++]; Xy 4k;+
else if(i2>r) )V[j~uOU)]
data[cur]=temp[i1++]; L FJ@4]%V
else if(temp[i1] data[cur]=temp[i1++]; +pYwc0~
else 0=6mb]VUi=
data[cur]=temp[i2++]; 1t &_]q_
} g|?}a]G
} %%?}db1n
0|tyKP|J
} |UWIV
eZ]r"_?
改进后的归并排序: h'=)dFw7
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package org.rut.util.algorithm.support; g_P98_2f.k
y'odn;
import org.rut.util.algorithm.SortUtil; mhhc}dS(H
8~-TN1H
/** 3))R91I
* @author treeroot )^s>21
* @since 2006-2-2 ;7?oJH;
* @version 1.0 H,w8+vZ4\
*/ wZ\93W-}
public class ImprovedMergeSort implements SortUtil.Sort { X;6;v]
#xu1 eX0<
private static final int THRESHOLD = 10; =0Y0o_
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/* sfw*_}y
* (non-Javadoc) x,10o
* &`n:AR`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p19(>|$J
*/ .$x}~Sw
public void sort(int[] data) { 9v*y&V9/
int[] temp=new int[data.length]; JluA?B7E
mergeSort(data,temp,0,data.length-1); >W-xDzJry
} oYf+I
lV^:2I/
private void mergeSort(int[] data, int[] temp, int l, int r) { ejkUNCKQt
int i, j, k; /ZabY
int mid = (l + r) / 2; |g^YD;9s.
if (l == r) *kK +Nvt8s
return; l9eTghLi
if ((mid - l) >= THRESHOLD) .U|'KCM9m
mergeSort(data, temp, l, mid); !w%c=V]tV
else 8gEp5
insertSort(data, l, mid - l + 1); .txtt?ZF2
if ((r - mid) > THRESHOLD) 6IT6EkiT
mergeSort(data, temp, mid + 1, r); k`N*_/(|n
else ]f&]E ~i
insertSort(data, mid + 1, r - mid); y< dBF[
x zF
for (i = l; i <= mid; i++) { YB4 ZI
temp = data; OQ_<Vxz
} 9ETdO,L)f
for (j = 1; j <= r - mid; j++) { X{Vs
temp[r - j + 1] = data[j + mid]; 9H4"=!AAgD
} i>h3UIx\
int a = temp[l]; O*?^a7Z)4
int b = temp[r]; 5ILKYUg,
for (i = l, j = r, k = l; k <= r; k++) { ^i_v\E[QU
if (a < b) { yQj J-g(.
data[k] = temp[i++]; af>i
a = temp; L,#YP#O,j
} else { rqN+0CT
data[k] = temp[j--]; |z_Dw$-xm
b = temp[j]; 5cQ]vb
} jmv=rl>E*
} J0R{|]W8
} 8w[O%
>@bU8}rT
/** +<xQF
* @param data @"fv[=Xb
* @param l !=.y[Db=
* @param i eza"<uBr
*/ e> 9X
private void insertSort(int[] data, int start, int len) { 7lwI]/ZH*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ti9e(Jt!O
} bIBF2m4
} iH-,l
} 2RNee@!JJP
} p2b~k[
<#M1I!R
堆排序： Y&=DjKoVh
a9NuYYr,h
package org.rut.util.algorithm.support; <BBzv-?D
K*Ba;"Ugeg
import org.rut.util.algorithm.SortUtil; !*&5O~dfN
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/** |#cqxr"
* @author treeroot GOA dhh-
* @since 2006-2-2 g_l-@
* @version 1.0 _7:Bxx4B
*/ *: FS/ir
public class HeapSort implements SortUtil.Sort{ i.On{nB"k
2&:z[d}~H
/* (non-Javadoc) )3e_Hs+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oupWzjo
*/ yxpv;v:)=
public void sort(int[] data) { 5,f`5'$
MaxHeap h=new MaxHeap(); !0zcS7&P
h.init(data); wo(O+L/w
for(int i=0;i h.remove(); dgX%NKv1
System.arraycopy(h.queue,1,data,0,data.length); x{w|Hy
} ) aMiT
Fng
private static class MaxHeap{ -WyB2$!(
Y+23 jlgb
void init(int[] data){ $RI$VyAjD
this.queue=new int[data.length+1]; _ti^i\8~
for(int i=0;i queue[++size]=data; X}3?k<m
fixUp(size); v:74iB$i/C
} RLQ*&[A}
} s1Wn.OGR4
6 A]a@,PC
private int size=0; qrw*?6mSQ
=eW4?9Uq
private int[] queue; *zweZG8:
K-Pcew^?
public int get() { 1qn/*9W}=
return queue[1]; K9&Q@3V
} {GCp5
hTv*4J&@|
public void remove() { ;DZj.|Sj+
SortUtil.swap(queue,1,size--); rf+}J_
fixDown(1); S\I+UeFkf
} 4PS|
file://fixdown p</t##]3ks
private void fixDown(int k) { GGHeC/4
int j; Iy*Q{H3[
while ((j = k << 1) <= size) { WixEnsJ
if (j < size %26amp;%26amp; queue[j] j++; \+U;$.)3
if (queue[k]>queue[j]) file://不用交换 #Cs/.(<
break; Y~^R^J
SortUtil.swap(queue,j,k); $;ny`^8
k = j; |p*cI @
} X_Lt{mf
} d<OdQvW.
private void fixUp(int k) { 1l^[%0
while (k > 1) { xgNV0;g,
int j = k >> 1; U5cbO{\3I
if (queue[j]>queue[k]) jb/C\2U4)
break; /\Xe'&
SortUtil.swap(queue,j,k); fYZd:3VdC
k = j; !JDuVqW
} #H~$^L
} 3''Kg<k,I
j8?! J^TC
} V{>;Z vj1R
oIj/V|ByK
} >^#Liwm
YT[=o}jS
SortUtil： P$h) Y
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package org.rut.util.algorithm; vYLspZ;S
9'|k@i:
import org.rut.util.algorithm.support.BubbleSort; oGeV!hD
import org.rut.util.algorithm.support.HeapSort; rB(Q)N
import org.rut.util.algorithm.support.ImprovedMergeSort; A -8]4p::
import org.rut.util.algorithm.support.ImprovedQuickSort; r_bG+iw7p
import org.rut.util.algorithm.support.InsertSort; 7}c[GC)F
import org.rut.util.algorithm.support.MergeSort; %O[1yZh \
import org.rut.util.algorithm.support.QuickSort; FoYs<aER
import org.rut.util.algorithm.support.SelectionSort; v1?G
import org.rut.util.algorithm.support.ShellSort; Mt{cX,DS
d=vD Pf
/** v=dN$B5y3
* @author treeroot q:jv9eL.O
* @since 2006-2-2 @sd{V
* @version 1.0 Ei<+{P(t0
*/ _m a;b<I/<
public class SortUtil { Ae^4
public final static int INSERT = 1; =7:}/&
public final static int BUBBLE = 2; hlc g[Qdo*
public final static int SELECTION = 3; %Y|AXxR
public final static int SHELL = 4; ~% ]V,-4
public final static int QUICK = 5; u0[O /G
public final static int IMPROVED_QUICK = 6; j[$+DCO#|m
public final static int MERGE = 7; b=WkRj
public final static int IMPROVED_MERGE = 8; e2nZwPH
public final static int HEAP = 9; ? )IH#kL
^Nav8dma
public static void sort(int[] data) { R*ex!u60M
sort(data, IMPROVED_QUICK); I(j{D>v
} l.}gWN9-
private static String[] name={ -biw{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =:xJZy$
}; _m#TL60m
L5&,sJz
private static Sort[] impl=new Sort[]{ FO]f 4@
new InsertSort(), .OW5R*
new BubbleSort(), %.uN|o&n
new SelectionSort(), Mj19;nc0I
new ShellSort(), #:MoZw`rlw
new QuickSort(), !HXsxNe
new ImprovedQuickSort(), iztF
new MergeSort(), %md9ou`
new ImprovedMergeSort(), % 1<@p%y/
new HeapSort() j6 _w2
}; ]8cD,NS
1&=2"
public static String toString(int algorithm){ rX`fjS*C
return name[algorithm-1]; ZiH4s|
} bhZ5-wo4%
|NjyO>@Pa
public static void sort(int[] data, int algorithm) { hSh^A5 /
impl[algorithm-1].sort(data); #fyY37-
} =7-kD3
H3JDA^5
public static interface Sort { $K|2k7
public void sort(int[] data); A>:31C
} zFwO(
eo"XHP7ja
public static void swap(int[] data, int i, int j) { :c[T@[
int temp = data; ')fIa2dO/
data = data[j]; dsK^-e6:5
data[j] = temp; pG/g
} O=1#KNS
} D9r;Ys%