[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; x?L hq2
} O2v.
int i1=l; 5pJ*1pfeo
int i2=mid+1; ]XUSqai
for(int cur=l;cur<=r;cur++){ l1<?ONB.#
if(i1==mid+1) GwQn;gkF
data[cur]=temp[i2++]; .pvxh|V
else if(i2>r) <xlm K(
data[cur]=temp[i1++]; \hbiU]
else if(temp[i1] data[cur]=temp[i1++]; |ym%| B
else tcA;#^jc
data[cur]=temp[i2++]; U3F3((EYJ
} ^~l $&~
} maDz W_3
*#2Rvt*Ox
} z*LiweR-
hZN<Yd8:
改进后的归并排序: ~G`J r
&Rp"rMeW
package org.rut.util.algorithm.support; -t4 [oB
1TRN~#ix
import org.rut.util.algorithm.SortUtil; lLCdmxbT
SRCOs1(EK9
/** 0M8.U
* @author treeroot &+r4
* @since 2006-2-2 El6bD% \G
* @version 1.0 `^##b6jH
*/ te'*<HM
public class ImprovedMergeSort implements SortUtil.Sort { |4Ha?W
C4NRDwU|.
private static final int THRESHOLD = 10; a+?~;.i~
'm O2t~n
/* Oh`2tc-
* (non-Javadoc) (X}@^]lpa
* T~s}Nx#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AuCWQ~
*/ FT/amCRyT
public void sort(int[] data) { }Bff,q
int[] temp=new int[data.length]; U8O(;+
mergeSort(data,temp,0,data.length-1); zj%cQkZ
} ]W) jmw'mo
`|<+ ?
private void mergeSort(int[] data, int[] temp, int l, int r) { (~()RkT
int i, j, k; Vk7=7%xW
int mid = (l + r) / 2; <4mQ*6
if (l == r) g:gB`8w?
return; Jps .;yjk
if ((mid - l) >= THRESHOLD) ;&?pd"^<_Z
mergeSort(data, temp, l, mid); A/ 0qk
else J_ J+cRwq
insertSort(data, l, mid - l + 1); ?63&g{vA
if ((r - mid) > THRESHOLD) \##`pa(8
mergeSort(data, temp, mid + 1, r); +v15[^F
else Q2\
insertSort(data, mid + 1, r - mid); [rdsv
',mW`ZN
for (i = l; i <= mid; i++) { S()Za@ [a$
temp = data; s[c^"@HT
} )+Y&4Qu
for (j = 1; j <= r - mid; j++) { hI~SAd ,#A
temp[r - j + 1] = data[j + mid]; !k<:k "7
} ]rW8y%yD
int a = temp[l]; AS;.sjgk
int b = temp[r]; G|9B)`S
for (i = l, j = r, k = l; k <= r; k++) { z{?4*Bq
if (a < b) { J_xG}d
data[k] = temp[i++]; T:!MBWYe|
a = temp; 509Q0 [k
} else { z[&s5"
data[k] = temp[j--]; _Bk U+=|J
b = temp[j]; )saR0{e0N
} Q$=*aUU%G
} }<[Db}?9
} +LzovC@^
LSkk;)'2K
/** XDLEVSly7
* @param data c> G@+
* @param l -G b-^G
* @param i ?~F. /
*/ gyus8#sT
private void insertSort(int[] data, int start, int len) { fp&Got!pB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h~miP7,c<u
} $TG?4
} .JAcPyK^
} F2>%KuM
} "mZ.V
?R6`qe_F
堆排序： 0BTLcEqgZ
,Y!zORv<7
package org.rut.util.algorithm.support; @ajM^L!O
9]$`)wZ
import org.rut.util.algorithm.SortUtil; Y}.Ystem
PXEKV0y
/** V5MO}
* @author treeroot 6Rz[?-mkLO
* @since 2006-2-2 GGE[{Gb9
* @version 1.0 _#'9kx|)
*/ oR %agvc^^
public class HeapSort implements SortUtil.Sort{ JTUNb'#RZ
lrys3
/* (non-Javadoc) Tbh'_F6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nj2gs,k
*/ h>3H7n.
public void sort(int[] data) { Hed$ytMaGz
MaxHeap h=new MaxHeap(); OM!=ViN(=
h.init(data); I;j3*lV_
for(int i=0;i h.remove(); ^ d\SPZ
System.arraycopy(h.queue,1,data,0,data.length); /V^sJ($V$~
} 3N<&u
}kPVtSQ
private static class MaxHeap{ ;CmOsA,1
!N~*EI$
void init(int[] data){ nem@sB;v#
this.queue=new int[data.length+1]; cT=wJ
for(int i=0;i queue[++size]=data; LOb'<R\p
fixUp(size); .L(j@I t
} %_@5_S
} DneSzqO"o
bmq XP
private int size=0; 5t5S{aCDr
v`ZusHJ1d
private int[] queue; uI-76
@01D1A
public int get() { ?D^,K`wY=B
return queue[1]; Xx<&6 4W
} uA/.4 b
*ZSp9g"Z
public void remove() { u+tb83~[=
SortUtil.swap(queue,1,size--); e'?doP
fixDown(1); ~ew**@N
} ^(m6g&$(
file://fixdown =|JIY
private void fixDown(int k) { g /@yK
int j; Q}f}Jf3P
while ((j = k << 1) <= size) { N5an9r&z(1
if (j < size %26amp;%26amp; queue[j] j++; (7jB_ p%
if (queue[k]>queue[j]) file://不用交换 n\ ',F
break; J)yy}[Fx
SortUtil.swap(queue,j,k); lbuW*)
k = j; =UKR<@QrK
} .gkPG'm[
} AoOG[to7
private void fixUp(int k) { SnF[mN'
while (k > 1) { dV=5_wXZ$
int j = k >> 1; 6r-n6#=
if (queue[j]>queue[k]) 3w:Z4]J
break; jUR#
SortUtil.swap(queue,j,k); Z2j*%/
k = j; xjbyI_D
} \NQ)Po@z
} u+gXBU
2"Uk}Yz|
} Q]g4gj
GxDF7 z%&
} ?nSp?m;
6p6Tse]
SortUtil： P$qkb|D,
F)iGD~
package org.rut.util.algorithm; nIDsCu=A
>/`cmNmb
import org.rut.util.algorithm.support.BubbleSort; bq&S?! =s
import org.rut.util.algorithm.support.HeapSort; N[bf.5T
import org.rut.util.algorithm.support.ImprovedMergeSort; ?*mbce[
import org.rut.util.algorithm.support.ImprovedQuickSort; +G[HZ,FL
import org.rut.util.algorithm.support.InsertSort; |mE+f]7$
import org.rut.util.algorithm.support.MergeSort; H|:)K^o
import org.rut.util.algorithm.support.QuickSort; )?IA`7X
import org.rut.util.algorithm.support.SelectionSort; Z *<x
import org.rut.util.algorithm.support.ShellSort; aC }1]7
m#K%dR
/** eF;1l<<
* @author treeroot b`|MK4M(
* @since 2006-2-2 Tl7:}X<?
* @version 1.0 t7+Ic
*/ '=5_u
public class SortUtil { 5 /jY=/0.a
public final static int INSERT = 1; yGG\[I;7
public final static int BUBBLE = 2; v*fc5"3eO
public final static int SELECTION = 3; p}zk&`
public final static int SHELL = 4; vrnj}f[h
public final static int QUICK = 5; 7>@/*S{X
public final static int IMPROVED_QUICK = 6; N3c)ce7[
public final static int MERGE = 7; }=m?gF%3
public final static int IMPROVED_MERGE = 8; jMWwu+w
public final static int HEAP = 9; +U)|&1oa
bnY8.Lpf|
public static void sort(int[] data) { cBF%])!
sort(data, IMPROVED_QUICK); @#Uiy5N
} :h^UC~[h 3
private static String[] name={ |{IU<o x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u2O^3rG-
}; `b`52b\6S
c%/&@vs7
private static Sort[] impl=new Sort[]{ UVmyOC[Y{
new InsertSort(), d?y\~<
new BubbleSort(), d#:J\2V"R
new SelectionSort(), SWO!E
new ShellSort(), Afhx`J1KO
new QuickSort(), :XZom+>2n
new ImprovedQuickSort(), {#M{~
new MergeSort(), >37}JUG
new ImprovedMergeSort(), x Bw.M{
new HeapSort() V+~{a:8[pq
}; iwjl--)@K
5qfKV&D
public static String toString(int algorithm){ 9l_?n@
return name[algorithm-1]; (C|V-}/*m
} "<$vU_
t}+c/ C%b=
public static void sort(int[] data, int algorithm) { !,!tNs1 K
impl[algorithm-1].sort(data); by<@Zwtf
} .LcE^y[V
'<D}5u72
public static interface Sort { 78~V/L;@S2
public void sort(int[] data); 'p+QFT>Ca
} ;p!hd}C
:BxYaAVt^
public static void swap(int[] data, int i, int j) { ZLX`[
int temp = data; Ns8NaD
data = data[j]; WzbN=& C]h
data[j] = temp; VD`2lGdF
} p)&\>
} l"y9XO|