[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; _Sr}3
} Geq]wv8
int i1=l; l2 .S^S
int i2=mid+1; `2.c=,S{
for(int cur=l;cur<=r;cur++){ 1VJ${\H]
if(i1==mid+1) pD<w@2K
data[cur]=temp[i2++]; 0AB a&'h
else if(i2>r) @]Cg5QW>T
data[cur]=temp[i1++]; cN,*QN
else if(temp[i1] data[cur]=temp[i1++]; }3#\vn0gT
else 4XpWDfa.}
data[cur]=temp[i2++]; BSm"]!D8*
} 2k.VTGak
} X*2W4udF
cH5i420;aO
} f[o~d`z
',EI[ ]+
改进后的归并排序: %Ig$:I(o
7+HK_wNi
package org.rut.util.algorithm.support; $TIeeTB
v=llg ^
import org.rut.util.algorithm.SortUtil; @v)Z>xv
Gx C+lqH#
/** [^hW>O=@TN
* @author treeroot xM jn=\}
* @since 2006-2-2 @| z _&E
* @version 1.0 ~c)&9'
*/ 26j<>>2
public class ImprovedMergeSort implements SortUtil.Sort { M$K%e
(`.# n3{
private static final int THRESHOLD = 10; pD{OB
Q#g`D,:o%~
/* 8V:;HY#
* (non-Javadoc) <C`bf$ak
* EFX2>&mWo8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [q9B"@X
*/ 0*{(R#
public void sort(int[] data) { \YvG+7a
int[] temp=new int[data.length]; OUBGbld
mergeSort(data,temp,0,data.length-1); [ws _ g,/
} &N}"4
Vl_6nY;
private void mergeSort(int[] data, int[] temp, int l, int r) { @)Vpj\jM-C
int i, j, k; D$ds[if$U,
int mid = (l + r) / 2; 7H Har'=T
if (l == r) o}AXp@cqi
return; !^arWH[od
if ((mid - l) >= THRESHOLD) =$'>VPQ
mergeSort(data, temp, l, mid); #NM)
else U)(R4Y6 v
insertSort(data, l, mid - l + 1); jq~`rE h9
if ((r - mid) > THRESHOLD) -`L`kL<
mergeSort(data, temp, mid + 1, r); l(>6Yq
else a{8a[z
insertSort(data, mid + 1, r - mid); |1@O>GG
j,YrM?Xdo
for (i = l; i <= mid; i++) { tT]@yo|?e/
temp = data; 6"-$WUlg
} w.m8SvS&b
for (j = 1; j <= r - mid; j++) { BE?]P?r?
temp[r - j + 1] = data[j + mid]; pCKP{c=6Q
} /2K"Mpf8
int a = temp[l]; K6v~!iiK$
int b = temp[r]; I5"wa:Z
for (i = l, j = r, k = l; k <= r; k++) { LHY7_"u#
if (a < b) { $?GggP d
data[k] = temp[i++]; SEgw!2H
a = temp; h#0n2o#
} else { b**vUt\
data[k] = temp[j--]; =R5W KX
b = temp[j]; yY$^ R|t
} | Y:`>2ev
} UQ0!tFx
} 4=,J@N-
!u7KgB<=/F
/** DGFSD Py[
* @param data FvsVfV U
* @param l Ct=bZW"j/
* @param i IyO0~Vx>
*/ * F!B4go
private void insertSort(int[] data, int start, int len) { 6P{bUom?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y [Vd*8
} +<E#_)}`D6
} v H HgZ
} >iTmILA
} Fs]N9],=I
?b_E\8'q]
堆排序： xw*e`9vAe
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package org.rut.util.algorithm.support; OX"Na2-el
/d&m#%9Up]
import org.rut.util.algorithm.SortUtil; x1:mT[[$
P-X|qVNK1Z
/** I9kz)Q o
* @author treeroot !oz{XWE
* @since 2006-2-2 Dw i-iA_q
* @version 1.0 'aNkU
*/ Pt"K+]Ym
public class HeapSort implements SortUtil.Sort{ h8V*$
uEgR>X>
/* (non-Javadoc) o)I)I/v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YJ~<pH
*/ H;`F}qQ3
public void sort(int[] data) { <)d%c%f'`
MaxHeap h=new MaxHeap(); "~Fg-{jM%
h.init(data); INndTF
for(int i=0;i h.remove(); #Y= A#Yz,{
System.arraycopy(h.queue,1,data,0,data.length); U5"u h} 3
} "kApGNB
8u*<GbKGI
private static class MaxHeap{ z83v J*.
a?gF;AYk
void init(int[] data){ ~gX1n9_n
this.queue=new int[data.length+1]; KR.;X3S}
for(int i=0;i queue[++size]=data; a 4?A 5
fixUp(size); kF1$
} SS/vw%
} I[E 6N2
b`e_}^,c
private int size=0; Ug*B[q/
~&~4{
private int[] queue; P#TPI*qw
QGNKQ`~
public int get() { .vHHw@
return queue[1]; rQv5uoD
} (^yaAy#4
:>!-[hfQ
public void remove() { /Am9w$_T[
SortUtil.swap(queue,1,size--); rl.K{Uad
fixDown(1); | V(sCF
} M8H hjoo
file://fixdown e"866vc,
private void fixDown(int k) { 1(;{w+nM
int j; /3)\^Pof
while ((j = k << 1) <= size) { n1\$|[^6
if (j < size %26amp;%26amp; queue[j] j++; WSpF/Wwc
if (queue[k]>queue[j]) file://不用交换 &l cfX\y
break; =Ji[ ;wy@
SortUtil.swap(queue,j,k); NFVu~t
k = j; mX|M]^_,z
} q&=z^Ln!G
} FKL4`GEm
private void fixUp(int k) { <HnJD/g
while (k > 1) { !v2/sq$G
int j = k >> 1; aH;AGbp
if (queue[j]>queue[k]) e\~nqKCb
break; huqtk4u
SortUtil.swap(queue,j,k); B-g uz[v
k = j; )i /w:g>
} dg.1{6HM
} [xGwqa03
gI7*zR4D
} pbKmFweq
v,n 8$,
} :G6CWE
Fepsa;\sU
SortUtil： >!5RY8+
@Yt394gA%\
package org.rut.util.algorithm; I{w(`[Nxw*
bR3Crz(9G
import org.rut.util.algorithm.support.BubbleSort; i).Vu}W#S
import org.rut.util.algorithm.support.HeapSort; TQb/lY9*
import org.rut.util.algorithm.support.ImprovedMergeSort; ta95]|z"j
import org.rut.util.algorithm.support.ImprovedQuickSort; ,~7~ S"
import org.rut.util.algorithm.support.InsertSort; &wDZ@{h
import org.rut.util.algorithm.support.MergeSort; 6}Y==GPt
import org.rut.util.algorithm.support.QuickSort; HB#!Dv&'
import org.rut.util.algorithm.support.SelectionSort; N!.o`4 "z
import org.rut.util.algorithm.support.ShellSort; I3 6@x`f
In4VS:dD
/** 7zzFM
* @author treeroot io\t>_
* @since 2006-2-2 7x.j:{2
* @version 1.0 4wv0~T$;x
*/ v,opyTwG|
public class SortUtil { }\m.~$|[
public final static int INSERT = 1; ~NE`Ad.G
public final static int BUBBLE = 2; WCY._H>|
public final static int SELECTION = 3; KHP/Y{mH
public final static int SHELL = 4; F&`%L#s|
public final static int QUICK = 5; N5W!(h)
public final static int IMPROVED_QUICK = 6; MMO/vJC
public final static int MERGE = 7; }#tbK 2[
public final static int IMPROVED_MERGE = 8; c)Ng9p
public final static int HEAP = 9; PE;<0Cz\
s5v}S'uO{
public static void sort(int[] data) { AaU!a
sort(data, IMPROVED_QUICK); ,f%4xXI
} d_:f-
private static String[] name={ /\qzTo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =,6X_m
}; },X.a@:
^d# AU7V|
private static Sort[] impl=new Sort[]{ Uo9@Y{<B
new InsertSort(), kbvF 9#
new BubbleSort(), -+i7T^@|
new SelectionSort(), -p0*R<t
new ShellSort(), c0l?+:0M
new QuickSort(), vH}VieU
new ImprovedQuickSort(), 5GPrZY"
new MergeSort(), 6Ik v}q_j
new ImprovedMergeSort(), hVyeHbx
new HeapSort() ``]NB=N}{1
}; o+{7"Na8[
^r<l#D,
public static String toString(int algorithm){ &hZ.K"@7{
return name[algorithm-1]; ngJ{az
} ]):>9q$C
'Hj([N
public static void sort(int[] data, int algorithm) { fg,vTpBk
impl[algorithm-1].sort(data); <}.!G>X
} 1}Guhayy
GB Vqc!d
public static interface Sort { 3QXsr<
public void sort(int[] data); @:Ft+*2
} jZ"j_=o@
&*8.%qe;
public static void swap(int[] data, int i, int j) { b%x=7SMXO
int temp = data; x8c>2w;6x^
data = data[j]; [j TU nP
data[j] = temp; W@zxGH$z>
} 6)ysiAH?
} ?Vh#Gr