[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; ;;YcuzQI3
} NDRW
int i1=l; xz"Z3B
int i2=mid+1; nrTv=*tDj
for(int cur=l;cur<=r;cur++){ .lvI8Jf~X
if(i1==mid+1) Z(Eke
data[cur]=temp[i2++]; %Ui{=920
else if(i2>r) coF T2Pq
data[cur]=temp[i1++]; Hz]4AS
else if(temp[i1] data[cur]=temp[i1++]; a IpPL8a
else [;?"R-V"z
data[cur]=temp[i2++]; llHc=&y#
} ,pyQP^u-
} C#Hcv*D
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} v}F4R $
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改进后的归并排序: (]3ERPn#y
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package org.rut.util.algorithm.support; oe(9mYWKa6
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import org.rut.util.algorithm.SortUtil; %bIsrQ~B
Kajkw>z
/** 0).fBBNG
* @author treeroot "_K}rI6(t
* @since 2006-2-2 [8F \;
* @version 1.0 \npz.g^c_
*/ xClRO,-
public class ImprovedMergeSort implements SortUtil.Sort { ";PG%_(
CN.6E<9'kK
private static final int THRESHOLD = 10; \f(Y:}9
t|;%DA)fjw
/* 9t{|_G
* (non-Javadoc) XnBm`vk?V!
* HUj+-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C _8j:Z&
*/ \s=QiPK
public void sort(int[] data) { 1^aykrnQ>
int[] temp=new int[data.length]; UhsO\9}qH
mergeSort(data,temp,0,data.length-1); C/F@ ]_y
} "@.Z#d|Y
&&;ex9
private void mergeSort(int[] data, int[] temp, int l, int r) { 6 -]>]Hr-
int i, j, k; l<:`~\#
int mid = (l + r) / 2; x.I][(}
if (l == r) oG!6}5
return; %VzYqj_P"
if ((mid - l) >= THRESHOLD) Js/N()X
mergeSort(data, temp, l, mid); Ll,I-BQ9
else z~F37]W3[
insertSort(data, l, mid - l + 1); Y|mW.
if ((r - mid) > THRESHOLD) s4(Wp3>3i
mergeSort(data, temp, mid + 1, r); M9gOoYf,~
else 9*' &5F=
insertSort(data, mid + 1, r - mid); {`a(Tl8V
$nj\\,(g
for (i = l; i <= mid; i++) { Q\H_t)-
temp = data; ]*0(-@
} )&>L !,z
for (j = 1; j <= r - mid; j++) { NN^QUB
temp[r - j + 1] = data[j + mid]; Q.yb4
} mxgqS=`
int a = temp[l]; nh<Z1tMU
int b = temp[r]; GjEqU;XBi
for (i = l, j = r, k = l; k <= r; k++) { C ck#Y
if (a < b) { Hj2<ZL
data[k] = temp[i++]; @a0Q0M
a = temp; sMP:sCRC
} else { 0 <g{ V
data[k] = temp[j--]; wZQ)jo7*g
b = temp[j]; ^+/kr/
} OZ(dpV9.S
} :]II-$/8
} z]@6fM[
q.V-LXM
/** w/m:{cHk
* @param data \?lz&<
* @param l @S3f:s0~D
* @param i 1[PMDS_X
*/ c0rk<V%5+
private void insertSort(int[] data, int start, int len) { &c%Y<1e`%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :dnJY%/q
} 'i|rjW(
} Qa4MZj;$K
} 3z8C
} lpmJLH.F
8%:]W^
堆排序： 'Jj=RAV`
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package org.rut.util.algorithm.support; wCKj7y[
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import org.rut.util.algorithm.SortUtil; (z7+|JE.
v"O5u%P
/** NXk!qGV2
* @author treeroot T.:+3:8|F
* @since 2006-2-2 ajH"Jy3A
* @version 1.0 UKBJ_r
*/ 7hw .B'7
public class HeapSort implements SortUtil.Sort{ EbQa?
EqB)sK/3
/* (non-Javadoc) zGlZ!t:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cj$6
*/ tkKJh !Q7
public void sort(int[] data) { m`A% p
MaxHeap h=new MaxHeap(); rZ03x\2
h.init(data); KY9n2u&4
for(int i=0;i h.remove(); 2N [=
System.arraycopy(h.queue,1,data,0,data.length); $jzFc!rs
} dJk9@u
%Y nmuZ
private static class MaxHeap{ $lwz-^1t.
l.=p8-/$'7
void init(int[] data){ ^+|De}`u
this.queue=new int[data.length+1]; k;^ :
for(int i=0;i queue[++size]=data; /Lf6WMit
fixUp(size); 2DDsWJ;
} 1Y j~fb(
} t0E51Ic@
bn9;7`>.
private int size=0; \IM4Z|NN"
FY3IUG
private int[] queue; ^s:y/Kd
YA]5~ZE\
public int get() { iw?I
return queue[1]; =r. >N\
} I/J7rkf
3`.P'Fh(k
public void remove() { ps|)cW3`
SortUtil.swap(queue,1,size--); IVxWxM*N<
fixDown(1); _.)eL3OF
} &:#h$`4
file://fixdown umEVy*hc
private void fixDown(int k) { W7No ls{
int j; ed!>)Cb
while ((j = k << 1) <= size) { @* ust>7
if (j < size %26amp;%26amp; queue[j] j++; ib6^x:HGU
if (queue[k]>queue[j]) file://不用交换 tOl e>]
break; NZLAk~R;0
SortUtil.swap(queue,j,k); io2)1cE&f
k = j; 0ezYdS~o
} P\2M[Gu(Q
} HfNDD|Zz
private void fixUp(int k) { !0VfbY9C
while (k > 1) { k=ytuV\
int j = k >> 1; E>jh"|f:{
if (queue[j]>queue[k]) "f.Z}AbP
break; tfO#vw,@
SortUtil.swap(queue,j,k); m:QG}{<.h
k = j; A#wEuX=[
} z`@^5_
} 7*o*6,/
/u<nLj1
} ~#K@ADYr
Dh|w^Q
} g2cVZ!GIj
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SortUtil： p zw8T
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package org.rut.util.algorithm; 4vnUN
UPU+ver
import org.rut.util.algorithm.support.BubbleSort; c~}l8M%
import org.rut.util.algorithm.support.HeapSort; kh$_!BT
import org.rut.util.algorithm.support.ImprovedMergeSort; . RVVWqW
import org.rut.util.algorithm.support.ImprovedQuickSort; lJ;J~>
import org.rut.util.algorithm.support.InsertSort; w&h2y4
import org.rut.util.algorithm.support.MergeSort; {^)70Vz>PE
import org.rut.util.algorithm.support.QuickSort; uLeRZSC
import org.rut.util.algorithm.support.SelectionSort; F t&+vS
import org.rut.util.algorithm.support.ShellSort; l(W[_ D
@r^!{
/** 5X.ebd;PT
* @author treeroot RSfM]w}Hq#
* @since 2006-2-2 B0}~G(t(
* @version 1.0 >T3H qYX5W
*/ rt7<Q47QE
public class SortUtil { B/f0P(7
public final static int INSERT = 1; 83~ i:+;
public final static int BUBBLE = 2; ZM#=`k9
public final static int SELECTION = 3; klOp ^w
public final static int SHELL = 4; j|fd-<ng
public final static int QUICK = 5; AnsjmR:Jv
public final static int IMPROVED_QUICK = 6; c{#yx_)V&
public final static int MERGE = 7; km5~Gc}
public final static int IMPROVED_MERGE = 8; f'(l&/4z{
public final static int HEAP = 9; `g''rfk}
"@3@/I
public static void sort(int[] data) { u^W2UE\
sort(data, IMPROVED_QUICK); k_|^kdWJ
} /TQ}} YVw
private static String[] name={ W`rNBfG>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PaB!,<A
}; zJlQ_U-!
kYwb -;
private static Sort[] impl=new Sort[]{ '(+<UpG_Q}
new InsertSort(), -<_$m6x"A
new BubbleSort(), >RI>J.~
new SelectionSort(), 34|a\b}
new ShellSort(), #Doq P:
new QuickSort(), K ?$#ntp
new ImprovedQuickSort(), cS.i
new MergeSort(), aT l c
new ImprovedMergeSort(), \(UKdv
new HeapSort() R>@uY(>dJ
}; ~}ml*<z@
pI[ZBoR~
public static String toString(int algorithm){ q~K(]Ya/
return name[algorithm-1]; T5Eseesp
} X~.f7Ao[
._:nw=Y0<}
public static void sort(int[] data, int algorithm) { JWP*>\P
impl[algorithm-1].sort(data); [&S}dQ"
} =4!nFi
>"3>s%
public static interface Sort { >n5:1.g
public void sort(int[] data); XkKC!
} 0pe3L
eEc4bVQa
public static void swap(int[] data, int i, int j) { 96Wp!]*
int temp = data; ,FQdtNMap
data = data[j]; cvsz%:Vs
data[j] = temp; Pj#'}ru!
} BG2)v.CU
} JHn*->m