[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; ]^BgSC
} &N|`Q(QXS
int i1=l; {"n=t`E)3
int i2=mid+1; 1b`WzoJgH
for(int cur=l;cur<=r;cur++){ L2`a| T=
if(i1==mid+1) 7>!Rg~M
data[cur]=temp[i2++]; l2 mO{'|C
else if(i2>r) dH_g:ocA
data[cur]=temp[i1++]; 3}gf%U]L
else if(temp[i1] data[cur]=temp[i1++]; vq-#%o
else CCp&+LRvR
data[cur]=temp[i2++]; JH`oa1b
} < +X,oxg
} wgFAPZr
29kR7[k
} w3Z;&sFd
P{%R*hb]
改进后的归并排序: )9s 6(Iu
kcio]@#
package org.rut.util.algorithm.support; M\6u4p!G!
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import org.rut.util.algorithm.SortUtil; a1 .+L
LR Dj!{k{
/** ' i<}/l
* @author treeroot qJq!0F
* @since 2006-2-2 !bQqzny$R
* @version 1.0 " 'TEBkj|u
*/ rUWC=?Q
public class ImprovedMergeSort implements SortUtil.Sort { ^<w3i?KPW
{1m.d;(1
private static final int THRESHOLD = 10; XO,gEn&6V
tA{?-5
/* }4XXNYH
* (non-Javadoc) _(0GAz%9
* vuO~^N]G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U8GvUysB!
*/ S?e*<s9k
public void sort(int[] data) { Y7WU4He L
int[] temp=new int[data.length]; \z[L=
mergeSort(data,temp,0,data.length-1); At)\$GJ
} m(p0)X),_i
_ Y8jl,J
private void mergeSort(int[] data, int[] temp, int l, int r) { Dx>~^ ^<
int i, j, k; U~s-'-C/
int mid = (l + r) / 2; /Q\|u:oO,
if (l == r) #5=!ew
return; WN3]xw3
if ((mid - l) >= THRESHOLD) DxJY{e9
mergeSort(data, temp, l, mid); 0p[-M`D
else dA=T+u
insertSort(data, l, mid - l + 1); -cs$E2 -
if ((r - mid) > THRESHOLD) h[}e5A]}
mergeSort(data, temp, mid + 1, r); 8s)(e9Sr
else t>%+[7?6
insertSort(data, mid + 1, r - mid); v%!'vhf_K
Hwiftx
for (i = l; i <= mid; i++) { #!R=h|
temp = data; 3iBUIv
} ;noZmPa
for (j = 1; j <= r - mid; j++) { Lu9`(+
temp[r - j + 1] = data[j + mid]; zIy&gOX
} Rs;Y|W4'
int a = temp[l]; -Ta| qQa
int b = temp[r]; S7f"\[Aw
for (i = l, j = r, k = l; k <= r; k++) { ve@E.`
if (a < b) { WdJJt2'
data[k] = temp[i++]; r>Cv@4/j
a = temp; . E?a
} else { Fd1jElt
data[k] = temp[j--]; L]#b=Y
b = temp[j]; <z R CT
} #[yZP9
} =L&dV]'4P
} ;$/]6@bqB
mWX{I2
/** qz&?zzz;
* @param data u?lbC9}$
* @param l 5 ]l8l+
* @param i z\+Ug9Of
*/ (;cvLop
private void insertSort(int[] data, int start, int len) { U]64HuL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h$$2(!G4
} H rI(uZ]
} lCiRvh1K
} 5"2pU{xmK
} '-M9v3itC
&"mWi-Mpl
堆排序： ~R C\
zp:EssO=Q
package org.rut.util.algorithm.support; <(W:Q3?s
xY<*:&
import org.rut.util.algorithm.SortUtil; O2N~&<^
cs0rz= ZdH
/** \<Di|X1
* @author treeroot p%ZAVd*|#V
* @since 2006-2-2 N.dcQQ_iS
* @version 1.0 RLR\*dL1
*/ !T RU
public class HeapSort implements SortUtil.Sort{ y[d>7fcf
KkyZd9
/* (non-Javadoc) 'QQa :3<x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WWN2
*/ uQO\vRh0
public void sort(int[] data) { IA^*?,AZy
MaxHeap h=new MaxHeap(); Y?xc#'
h.init(data); eoxEnCU
for(int i=0;i h.remove(); dr^MW?{a\
System.arraycopy(h.queue,1,data,0,data.length); y!/:1BHlm
} yyc4'j+
dlCmSCp%
private static class MaxHeap{ `{ ` W-C
^\7GFpc
void init(int[] data){ Mc/= Fs
this.queue=new int[data.length+1]; 2|$G<f
for(int i=0;i queue[++size]=data; !<= ^&\A
fixUp(size); L-VisZ-FK
} V*H7m'za
} UYvdzCUh
O1Nya\^g<I
private int size=0; SshjUNx
Q(/F7"m
private int[] queue; @|d+T"f
&{ZTtK&JF
public int get() { sjG@4Or
return queue[1]; L^e%oQ>s
} k@^T<Ci
Oz-@e%8L
public void remove() { + ;_0:+//
SortUtil.swap(queue,1,size--); }E#1Z\)
fixDown(1); b{a\j%
} _l=X?/
file://fixdown "J>8ZUP
private void fixDown(int k) { OpLUmn
int j; ,nSapmg
while ((j = k << 1) <= size) { yt#~n_
if (j < size %26amp;%26amp; queue[j] j++; tG*HUN?*
if (queue[k]>queue[j]) file://不用交换 ]+d>;$O
break; 'pC51}[A{^
SortUtil.swap(queue,j,k); C(&3L[
k = j; tb;u%{S
} ,d7o/8u
} #r'S@:[
private void fixUp(int k) { 2k+u_tj>
while (k > 1) { 1)J' pDa
int j = k >> 1; rnRWL4
if (queue[j]>queue[k]) y;=/S?L.:
break; "GB493=v
SortUtil.swap(queue,j,k); U[|o!2$
k = j; 8XD_p);Oy
} |6 E !wW
} N7-LgP
S#N4!"
} PZk"!I<oN
epG!V#I
} cHX~-:KOr
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SortUtil： S3gd'Bahq
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package org.rut.util.algorithm; nHl{'|~
|[X-i["y
import org.rut.util.algorithm.support.BubbleSort; X1o=rT
import org.rut.util.algorithm.support.HeapSort; S)x5.vo^
import org.rut.util.algorithm.support.ImprovedMergeSort; MR/gLm(8(
import org.rut.util.algorithm.support.ImprovedQuickSort; d'[]
import org.rut.util.algorithm.support.InsertSort; pZ5eGA=
import org.rut.util.algorithm.support.MergeSort; ~'0W(~Q8
import org.rut.util.algorithm.support.QuickSort; 7uq^TO>9f
import org.rut.util.algorithm.support.SelectionSort; Ny G?^
import org.rut.util.algorithm.support.ShellSort; #]z_pp:
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/** M?QX'fia
* @author treeroot O6n]l
* @since 2006-2-2 Xd5uF/w
* @version 1.0 M`H@ % M
*/ tC\(H=ecP
public class SortUtil { G-5ezVli
public final static int INSERT = 1; `Hd~H
public final static int BUBBLE = 2; $fG~;`T
public final static int SELECTION = 3; 4nKlW_{,
public final static int SHELL = 4; I8VCR8q
public final static int QUICK = 5; )wCV]TdF
public final static int IMPROVED_QUICK = 6; NE+ ;<mW
public final static int MERGE = 7; z4 KKt&
public final static int IMPROVED_MERGE = 8; rkn'1M&u
public final static int HEAP = 9; N `[ ?db-%
Y7<(_p7
public static void sort(int[] data) { #sM*<2vj
sort(data, IMPROVED_QUICK); t4<+]]
} ,tak{["
private static String[] name={ y\ax?(z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nx@,oC4
}; Y'76!Y
`_!R;f
private static Sort[] impl=new Sort[]{ U &RZx&W
new InsertSort(), J }|6m9k!
new BubbleSort(), <v3pI!)x
new SelectionSort(), =H8Y
new ShellSort(), R<;;Ph
new QuickSort(), t^"8 v3'h
new ImprovedQuickSort(), Zty9O8g
new MergeSort(), mZ~f?{
new ImprovedMergeSort(), sE!$3|Q
new HeapSort() HM &"2c
}; 3|=L1Pw#
@0-vf>e3-
public static String toString(int algorithm){ F"0=r
return name[algorithm-1]; 0}N"L ml
} Q-Oj%w4e
[wn! <#~v
public static void sort(int[] data, int algorithm) { hkx(r5o
impl[algorithm-1].sort(data); aV#phP
} Q:8t1ZDo
W{fNZb'
public static interface Sort { 5=/j
public void sort(int[] data); i9D<jkc
} 6mV^akapv
U&0 RQ:B
public static void swap(int[] data, int i, int j) { m^>v~Q~~
int temp = data; TNlOj a:
data = data[j]; k(M(]y_
data[j] = temp; @4=Az1W*
} {!^0j{T
} *M'/z=V?%