[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; }>V=J aG
} w\{#nrhYU
int i1=l; Ex skd}
int i2=mid+1; .L]5,#2([
for(int cur=l;cur<=r;cur++){ 9<3fH J?vq
if(i1==mid+1) #zBqj;p
data[cur]=temp[i2++]; u7j,Vc'~
else if(i2>r) -= izu]Fb,
data[cur]=temp[i1++]; $1Zr.ERL|(
else if(temp[i1] data[cur]=temp[i1++]; 5fYWuc9}z
else }w-M.
data[cur]=temp[i2++]; R~fk/T?
} #&1gVkvp
} B]6Lbp"oo
*xY3F8
} xvomn`X1
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改进后的归并排序: IM5[O}aq
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package org.rut.util.algorithm.support; gQJLqs"F
bbDm6,
import org.rut.util.algorithm.SortUtil; oK$Krrs0&
XODp[+xEEt
/** C ,|9VH
* @author treeroot z4$9,p `
* @since 2006-2-2 w.#z>4#3-
* @version 1.0 *'\HG
*/ 4:pgZz!
public class ImprovedMergeSort implements SortUtil.Sort { DsbTx.vA
F^S]7{
private static final int THRESHOLD = 10; 69apTx
ck3+A/ !z
/* (U 4n} J
* (non-Javadoc) "S*@._
* "fUNrhCx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xq=!1>
*/ .yFO] r1aL
public void sort(int[] data) { KWAd~8,mk
int[] temp=new int[data.length]; }[h]z7e2S
mergeSort(data,temp,0,data.length-1); Z:es7<#y
} XXA]ukj;r
bf{_U%`
private void mergeSort(int[] data, int[] temp, int l, int r) { b;#_?2c
int i, j, k; c\&;Xr
int mid = (l + r) / 2; rK`^A
if (l == r) *<6dB#' J
return; 0CK
if ((mid - l) >= THRESHOLD) y6x./1Nb}<
mergeSort(data, temp, l, mid); FK94CI
else `!(%Rk
insertSort(data, l, mid - l + 1); aw~h03R_Z
if ((r - mid) > THRESHOLD) *::.Uo4O
mergeSort(data, temp, mid + 1, r); \okv}x^L=Z
else a|.IAxJ
insertSort(data, mid + 1, r - mid); Q"GM3?
F`2h,i-9
for (i = l; i <= mid; i++) { X%kJ3{
temp = data; sUK|*y
} |]k,0Y3v
for (j = 1; j <= r - mid; j++) { CDsl)
temp[r - j + 1] = data[j + mid]; %e3E}m>
} V0W4M%
int a = temp[l]; V\opC6*L_e
int b = temp[r]; DS>&|zF5l
for (i = l, j = r, k = l; k <= r; k++) { 9!Jt}n?!g
if (a < b) { PHY!yc-LjV
data[k] = temp[i++]; 4;r,U{uR
a = temp; %<[{zd1C-
} else { ~(huUW
data[k] = temp[j--]; lSO$Q]!9
b = temp[j]; ' i<4;=M&
} Un,'a8>V`
} udIm}jRA"
} MX7Ix{
\Q1&w2mw
/** q9{)nU
* @param data =5V7212
* @param l MI^$df
* @param i "PO8Q
*/ j(]O$""
private void insertSort(int[] data, int start, int len) { `wU['{=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1#Hr{&2
} x?0K'
} l^B4.1rT
} )pT5"{
} F]r'j ZL
@TX@78fWz=
堆排序： )*{B_[
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package org.rut.util.algorithm.support; U1pE2o-
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import org.rut.util.algorithm.SortUtil; b4bd^nrqV
?Tu=-ppw
/** =T&<z_L
* @author treeroot e84%Y8,0
* @since 2006-2-2 0GeL">v,:=
* @version 1.0 \AA9 m'BZ
*/ A#19&}
public class HeapSort implements SortUtil.Sort{ Dm8fcD
XMT@<'fI
/* (non-Javadoc) y 5=rr3%v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RWo7_XO
*/ wvxz:~M
public void sort(int[] data) { 9p3~WA/M@
MaxHeap h=new MaxHeap(); g1"ZpD
h.init(data); zwJ&K;"y(
for(int i=0;i h.remove(); ;' vkF
System.arraycopy(h.queue,1,data,0,data.length); 2nCc(F&+?
} XM*5I4V
vM5/KrW
private static class MaxHeap{ % XZ&(
/IJy'@B
void init(int[] data){ 0)~c)B:5
this.queue=new int[data.length+1]; !K}W.yv,
for(int i=0;i queue[++size]=data; knph549
fixUp(size); N[Ei%I
} US"g>WLwJ
} JS%LJ_J
w5~j|c=_W
private int size=0; B@i%B+qCLv
"-dA\,G
private int[] queue; q>>1?hzA
~yw]<{?
public int get() { ~LV]cX2J(
return queue[1]; >dm9YfQ
} ryh"/lu[B
oVn&L*H
public void remove() { eA-oqolY
SortUtil.swap(queue,1,size--); nK?S2/o#A
fixDown(1); oQu>Qr{Zp
} |Rkw/5
file://fixdown K/f-9hE F
private void fixDown(int k) { 7(h@5
int j; YW/V}C'>
while ((j = k << 1) <= size) { U4K ZPk
if (j < size %26amp;%26amp; queue[j] j++; RtHai[j
if (queue[k]>queue[j]) file://不用交换 "0#(<zb|
break; !bYVLFp=\_
SortUtil.swap(queue,j,k); Ry]9n.y
k = j; QSa#}vCp*
} R2-F@_
} 3e1-w$z&S
private void fixUp(int k) { {j]cL!Od
while (k > 1) { 43M.Hj]
int j = k >> 1; @P75f5p}<
if (queue[j]>queue[k]) HB'9&
break; I#O"<0 *r
SortUtil.swap(queue,j,k); a~_JTH4=t
k = j; ]YFjz/f
} .IdbaH _a
} 4W*o:Y!
K$/"I0YyI
} Fb%?qaLmCv
K|-m6!C!7
} GPhhg
p!^K.P1 '
SortUtil： 8zj&e8&v
5 D^#6h 4
package org.rut.util.algorithm; nYZ6'Iwi'
Y)5O %@Rl
import org.rut.util.algorithm.support.BubbleSort; la-:"gKC
import org.rut.util.algorithm.support.HeapSort; *!&?Xy%\"j
import org.rut.util.algorithm.support.ImprovedMergeSort; ,pGA|ob
import org.rut.util.algorithm.support.ImprovedQuickSort; tJ>>cFx
import org.rut.util.algorithm.support.InsertSort; !o_eK\p
import org.rut.util.algorithm.support.MergeSort; vn$=be8l4
import org.rut.util.algorithm.support.QuickSort; W$NFk(
import org.rut.util.algorithm.support.SelectionSort; Aixe?A_x
import org.rut.util.algorithm.support.ShellSort; 6?<lS.s
Y!_c/!Tx
/** O$m &!J
* @author treeroot i({\fb|0
* @since 2006-2-2 !'F1Ht
* @version 1.0 YF-E1`+?<
*/ a@W9\b@I
public class SortUtil { \ Voly
public final static int INSERT = 1; 0q-lyVZ^X
public final static int BUBBLE = 2; 7>O`UT<t4@
public final static int SELECTION = 3; 8uLS7\,$z
public final static int SHELL = 4; }kvix{
public final static int QUICK = 5; $[fqTh
public final static int IMPROVED_QUICK = 6; l$9k:#\FD
public final static int MERGE = 7; !0Nf`iCQ(
public final static int IMPROVED_MERGE = 8; i)X~L4gn
public final static int HEAP = 9; nf"#F@dk
+<[q"3
public static void sort(int[] data) { uE9,N$\L_
sort(data, IMPROVED_QUICK); 7R:Ij[dV
} a<r,LE
private static String[] name={ ROQ]sQpk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a_5s'Dh
}; {Oy|c
"%^_.Db>|
private static Sort[] impl=new Sort[]{ [[AO6.Z
new InsertSort(), B47I?~{
new BubbleSort(), #vyf*jPr
new SelectionSort(), cw 2!V@
new ShellSort(), 54>0Dv??H
new QuickSort(), HOWpTu(
new ImprovedQuickSort(), Fovah4q%V
new MergeSort(), bs)wxU`Q*
new ImprovedMergeSort(), !fn%Q'S
new HeapSort() sa o&
}; T{+a48,;
|LQ%sV
public static String toString(int algorithm){ Z@Q*An
return name[algorithm-1]; LS<+V+o2%
} k"DZ"JC
CA`V)XIsP
public static void sort(int[] data, int algorithm) { }O@>:?U
impl[algorithm-1].sort(data); GyQFR?
} &>+T*-'
Q?>r:vMi
public static interface Sort { e3CFW_p
public void sort(int[] data); ky[Cx!81C
} 0:[A4S`X
L QV@]z&
public static void swap(int[] data, int i, int j) { #1'q'f:7&
int temp = data; (b#M4ho*f
data = data[j]; Bj\ x
data[j] = temp; Ka(B&.
} '{ =F/q
} P`Ku. ONQ