[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{#^O/
} Mt4]\pMUb
int i1=l; HCOsVTl,
int i2=mid+1; =~O3j:<6
for(int cur=l;cur<=r;cur++){ .'M.yE~5J
if(i1==mid+1) 2Di~}*9&
data[cur]=temp[i2++]; bsu?Q'q
else if(i2>r) ]B(}^N>WH
data[cur]=temp[i1++]; l#cVQ_^"
else if(temp[i1] data[cur]=temp[i1++]; s>G6/TTH6
else 65zwi-
data[cur]=temp[i2++]; ^iEf"r
} dwB#k$VIOw
} "#wAGlH6>
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} )q'dX+4=eL
wrJQkven-
改进后的归并排序: ^kNVQJiZyG
=Jl\^u%H(x
package org.rut.util.algorithm.support; [UkcG9
?5">50
import org.rut.util.algorithm.SortUtil; jF6Q:`k
AT t.}-
/** 1R-0b{w[
* @author treeroot 1W*Qc_5 v1
* @since 2006-2-2 ?:vg`m!*
* @version 1.0 wOL%otEf
*/ 53uptQ{
public class ImprovedMergeSort implements SortUtil.Sort { 3SWDPy
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private static final int THRESHOLD = 10; {0j,U\ kb
X{xkXg8h
/* u*l>)_HD
* (non-Javadoc) rIPg,4y*S!
* %pg)*>P h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z=-#{{bv
*/ AIl`>ac
public void sort(int[] data) { # d"M(nt
int[] temp=new int[data.length]; 0 F8xS8vK+
mergeSort(data,temp,0,data.length-1); o7we'1(O
} im<!JMI
n\Is}Czl
private void mergeSort(int[] data, int[] temp, int l, int r) { LGy62 y$
int i, j, k; fPN/Mxu
int mid = (l + r) / 2; r|Uz?
if (l == r) XKp(31])
return; 7202N?a {
if ((mid - l) >= THRESHOLD) r8R7@S2V'
mergeSort(data, temp, l, mid); n)cc\JPQ
else 71Q`B#t0'Z
insertSort(data, l, mid - l + 1); b^[>\s'
if ((r - mid) > THRESHOLD) :F5(]g 7
mergeSort(data, temp, mid + 1, r); 6R m dt
else fC^d@4ha
insertSort(data, mid + 1, r - mid); ajRht+{
Q>yj<DR
for (i = l; i <= mid; i++) { "j`T'%EV
temp = data; iU0jv7}n
} dh}"uM}a
for (j = 1; j <= r - mid; j++) { L9hL@
temp[r - j + 1] = data[j + mid]; ~mH'8K|l
} 7 HL Uk3
int a = temp[l]; sk5=$My
int b = temp[r]; OvdBUcp[
for (i = l, j = r, k = l; k <= r; k++) { +:#g6(P]
if (a < b) { s!09cS
data[k] = temp[i++]; ,EH-Sf2Cb
a = temp; Mf"(P.GIS
} else { =S^vIo)
data[k] = temp[j--]; MAqETjB
b = temp[j]; 1jSmTI d
} jz'%(6#'gW
} eG1A7n'6W
} YedF%
LfnQcI$kO
/** /;TD n>lq
* @param data /jaO\t'q
* @param l ?~^p:T
* @param i " d~M\Az
*/ r+]a
private void insertSort(int[] data, int start, int len) { BR6HD7G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z,qNuv"W
} :'H}b*VWx
} -K^(L#G
} muK)Yw[#N
} ;(g"=9e
oPAc6ObOV~
堆排序： -uAGG?ZER
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package org.rut.util.algorithm.support; dg N#"
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import org.rut.util.algorithm.SortUtil; _Axw$oYS
qqYQ/4Ajw
/** 5=poe@1g
* @author treeroot tr 8Q{
* @since 2006-2-2 N:^4OnVR
* @version 1.0 00W_XhJ
*/ }D~m%%,
public class HeapSort implements SortUtil.Sort{ &@&^k$du8q
='/#G0W
/* (non-Javadoc) }q/[\3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5',b~Pp
*/ jN+2+P%OL
public void sort(int[] data) { up3mum
MaxHeap h=new MaxHeap(); D1fUEHB}A8
h.init(data); )A;jBfr
for(int i=0;i h.remove(); fK4O N'[R:
System.arraycopy(h.queue,1,data,0,data.length); Xp|$z~
} DqH]FS?]
\iwUsv>SB
private static class MaxHeap{ wzI*QXV2s
d D^?%,a
void init(int[] data){ 1kc{`oL
this.queue=new int[data.length+1]; n u>6UjV
for(int i=0;i queue[++size]=data; {6*UtG
fixUp(size); n*=Tm KQ
} H#`&!p
} ~bjT,i
y3 S T"U
private int size=0; U%2{PbL
xl,?Hh%#
private int[] queue; SkXx:@
i;+<5_
public int get() { i\L7z)u
return queue[1]; ^\PNjj*C i
} `? f sU
TsRbIq[
public void remove() { w4&-9[@Y
SortUtil.swap(queue,1,size--); ,S3uY6,
fixDown(1); f2$<4Hhmm
} `\-mqe
file://fixdown 28,HZaXhc
private void fixDown(int k) { 5sMyH[5zY
int j; ukXKUYNm8
while ((j = k << 1) <= size) { B{_-k
if (j < size %26amp;%26amp; queue[j] j++; Bv=:F5hLG
if (queue[k]>queue[j]) file://不用交换 *5'l"YQ@1
break; i ;YRE&X
SortUtil.swap(queue,j,k); t9kqX(!
k = j; <C7/b#4>\
} m3b?f B
} 1b"3]?
private void fixUp(int k) { 3rv~r0
while (k > 1) { 3n TpL#
int j = k >> 1; =hKu85
if (queue[j]>queue[k]) g>Kh?(
break; 5NYYrA8,^
SortUtil.swap(queue,j,k); cA B^]j
k = j; ZP7wS
} `l}r&z(8
} K}Pi"Le@W
0bMbM^xV6
} T+<OlXpL
kv3V|
} &uv7`VT
>:U{o!N`#_
SortUtil： 6?jSe<4x
W#[3a4%m
package org.rut.util.algorithm; Fm.IRu<\`
Z|Xv_Xo|4
import org.rut.util.algorithm.support.BubbleSort; xXc3#n
import org.rut.util.algorithm.support.HeapSort; ,HO@bCK
import org.rut.util.algorithm.support.ImprovedMergeSort; vn=0=(
import org.rut.util.algorithm.support.ImprovedQuickSort; @$d_JwI
import org.rut.util.algorithm.support.InsertSort; c:z<8#A}
import org.rut.util.algorithm.support.MergeSort; q0]Z` <w
import org.rut.util.algorithm.support.QuickSort; *6*/kV?F
import org.rut.util.algorithm.support.SelectionSort; `wLa.Gzj
import org.rut.util.algorithm.support.ShellSort; J|I&{
e;)&Hc:Z
/** ,n+~S^r
* @author treeroot ,1-#Z"~c
* @since 2006-2-2 SSI('6Z/
* @version 1.0 #kDJ>r |&-
*/ ~Aq$GH4
public class SortUtil { <)9E.h
public final static int INSERT = 1; <q#/z&F!
public final static int BUBBLE = 2; ?f[U8S}
public final static int SELECTION = 3; nHi6$} I
public final static int SHELL = 4; Ej64^*
public final static int QUICK = 5; *+'l|VaVq\
public final static int IMPROVED_QUICK = 6; .1& F p
public final static int MERGE = 7; 0(dXU\Y
public final static int IMPROVED_MERGE = 8; ns1@=f cO
public final static int HEAP = 9; n*fsdo~
5;-?qcb^w
public static void sort(int[] data) { N,NEg4 q[
sort(data, IMPROVED_QUICK); 8a4&}^|
} rY&Y58./
private static String[] name={ % 2lcc"'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ('.r_F
}; rN^P//
7Cj6Kw5k
private static Sort[] impl=new Sort[]{ Tn8GLn
new InsertSort(), q!zsGf{
new BubbleSort(), 9gokTFoN
new SelectionSort(), -{XXU)Z
new ShellSort(), LK[%}2me
new QuickSort(), X>y6-%@
new ImprovedQuickSort(), b}#ay2AR
new MergeSort(), u0& dDZ
new ImprovedMergeSort(), oVSq#I4
new HeapSort() WH^rM`9
}; R+O[,UM^I~
GiN\@F!
public static String toString(int algorithm){ FsYsQ_,R3
return name[algorithm-1]; 2r=A'
} v'zf*]9
55T c
public static void sort(int[] data, int algorithm) { c,I|O' &k
impl[algorithm-1].sort(data); h .$3jNU
} C6C7*ks
Z,osdF
public static interface Sort { |YAnd=$
public void sort(int[] data); SQB[d3f
} )FrXD3p
P7GF"/
public static void swap(int[] data, int i, int j) { /P/S0
int temp = data; Ug^v ]B9
data = data[j]; "xV9$m>
data[j] = temp; &N!;d E
} [!E8C9Q#!
} )cy_d!