[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; ![4<6/2gy
} ) v^;"q"
int i1=l; qx<h rC0Z&
int i2=mid+1; \-~TW4dYe
for(int cur=l;cur<=r;cur++){ Uk|(VR9
if(i1==mid+1) @XFy^?
data[cur]=temp[i2++]; r__Y{&IO
else if(i2>r) *&lNzz5&
data[cur]=temp[i1++]; %vFoTu)2
else if(temp[i1] data[cur]=temp[i1++]; i$!-mYi+Q!
else kA%"-$3
data[cur]=temp[i2++]; CP!>V:w%9!
} $d_%7xx
} E8s&.:;+
U<H< !NV
} yCT:U&8%F
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改进后的归并排序: eW^_YG%(
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package org.rut.util.algorithm.support; ;OynkZs)
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import org.rut.util.algorithm.SortUtil; sM$gfFx
l2LUcI$ x
/** a+Z95~*sZ"
* @author treeroot ?A7_&=J%
* @since 2006-2-2 #^~[\8v>
* @version 1.0 N++jI(
*/ (:2,Rr1"
public class ImprovedMergeSort implements SortUtil.Sort { `cBV+00YS
m?Qr)F_M
private static final int THRESHOLD = 10; OfSHZ;,
<"Cacfg
/* WYklS<B[
* (non-Javadoc) ]5}C@W@_
* 251^>x.R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DYKJVn7w
*/ 'Bv)UfZ
public void sort(int[] data) { \E3evU
int[] temp=new int[data.length]; !9knFt43
mergeSort(data,temp,0,data.length-1); k{q4Zz[
} <i(<|/$
io{uN/!X_J
private void mergeSort(int[] data, int[] temp, int l, int r) { Vx6/Rehj
int i, j, k; B5Y 3GWhrx
int mid = (l + r) / 2; {2Jn#&Z29
if (l == r) D-<9kBZs
return; (d2|r)O
if ((mid - l) >= THRESHOLD) &hb:~>
mergeSort(data, temp, l, mid); Ow\dk^\-G8
else ZH<:YOQ
insertSort(data, l, mid - l + 1); )|?s!rw +
if ((r - mid) > THRESHOLD) *6trK`tx^
mergeSort(data, temp, mid + 1, r); /X_g[*]?
else `pzXh0}|
insertSort(data, mid + 1, r - mid); H=j&uv8
DZI:zsf;5Q
for (i = l; i <= mid; i++) { |3A/Og
temp = data; a*Oc:$
} r)G^V&96
for (j = 1; j <= r - mid; j++) { tgPx!5U
temp[r - j + 1] = data[j + mid]; Y]SX2kk(2
} ~Yw`w2
int a = temp[l]; ZFAi9M
int b = temp[r]; ,@1.&!F4it
for (i = l, j = r, k = l; k <= r; k++) { "+6:vhP5
if (a < b) { W+C@(}pt
data[k] = temp[i++]; "V;5Lp b
a = temp; feH|sz`e
} else { }Ra'`;D$
data[k] = temp[j--]; }yfSF|\
b = temp[j]; !F_BLHig
} DFKumw>!
} y,D4b6
} 6:v$g
i,Q{Z@,
/** } :@s
* @param data >K2Md*[P3q
* @param l (\UA+3$4
* @param i YGj3W.eH
*/ ^/<0r]=
private void insertSort(int[] data, int start, int len) { 3k J8Wn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dDAIfe2y
} VQQtxHTC3
} `T gwa
} dBKceL v
} ;%j1'VI
^\z.E?v%
堆排序： <{"]&bl
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package org.rut.util.algorithm.support; =D2jJk?AX
.9< i
import org.rut.util.algorithm.SortUtil; Ie[8Iot?bn
tCJ+OU5/
/** FOFZ/q
* @author treeroot /NH9$u.g
* @since 2006-2-2 $&@L[[xl
* @version 1.0 19u'{/Y"
*/ LvsNU0x
public class HeapSort implements SortUtil.Sort{ =X0"!y"
YMidSfi
/* (non-Javadoc) %YI Xk1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =2 3H/
*/ CO`%eL~
public void sort(int[] data) { V?a+u7*U&
MaxHeap h=new MaxHeap(); X_}2xo|T
h.init(data); UKBVCAK
for(int i=0;i h.remove(); }w0>mA0=H
System.arraycopy(h.queue,1,data,0,data.length); xMAfa>]{n
} Iq@:n_~
ZZ<uiN$
private static class MaxHeap{ 5w\>Whbd
LG0z|x(
void init(int[] data){ [84f[`!Ui
this.queue=new int[data.length+1]; 1@j0kTJ~m
for(int i=0;i queue[++size]=data; cBl F
fixUp(size); oQ!56\R
} D{]t50a.
} &vf%E@<
+wAH?q8f
private int size=0; v[r5!,F
1 h.=c
private int[] queue; )}-,4Iu%
&B</^:
public int get() { S}/?Lm}
return queue[1]; ?Mb'l4
} *nv%~t
L"w% ew
public void remove() { L8&$o2+07r
SortUtil.swap(queue,1,size--); '.sS"QdN
fixDown(1); I.f)rMl+h
} +J^-B}v
file://fixdown z$VA]tI(
private void fixDown(int k) { yEnurq%J
int j; 5Iv3B|u
while ((j = k << 1) <= size) { 2{v$GFc/
if (j < size %26amp;%26amp; queue[j] j++; TTS.wBpR,
if (queue[k]>queue[j]) file://不用交换 %>dCAj"
break; }/ p>DMN
SortUtil.swap(queue,j,k); 9t.u9C=!F
k = j; qP"+SVqC
} DS@ZE Q`F
} lG\6z"K
private void fixUp(int k) { tSr.0'CE
while (k > 1) { )%4%Uo_Xm
int j = k >> 1; ,cbCt
if (queue[j]>queue[k]) HC4vet
break; Svs!C+:le
SortUtil.swap(queue,j,k); ?R 4sH
k = j; =*VKp{5=
} 4,8=0[eRG
} N3D{t\hg
)jM' x&Vg
} X=i^[?C
e/pZLj]M
} tevB2'3^
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SortUtil： :x36^{7
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package org.rut.util.algorithm; W| z djb
Zc_%hQf2A
import org.rut.util.algorithm.support.BubbleSort; i8F^ N=
import org.rut.util.algorithm.support.HeapSort; kZ&|.q1zki
import org.rut.util.algorithm.support.ImprovedMergeSort; cmpT_51~O
import org.rut.util.algorithm.support.ImprovedQuickSort; qq%\
import org.rut.util.algorithm.support.InsertSort; P}] xz Vy
import org.rut.util.algorithm.support.MergeSort; HN/ %(y
import org.rut.util.algorithm.support.QuickSort; v"y0D
import org.rut.util.algorithm.support.SelectionSort; 0b)^#+
import org.rut.util.algorithm.support.ShellSort; h]wahExYP
]SqLF!S(=
/** ,]1oG=`3v
* @author treeroot ^sLnKAN
* @since 2006-2-2 Md~% e'
* @version 1.0 Q\pTyNAYn
*/ =Kq/EDe
public class SortUtil { }ze,6T*z
public final static int INSERT = 1; cQ= "3M)~r
public final static int BUBBLE = 2; RTPxAp+\5
public final static int SELECTION = 3; ::k>V\;
public final static int SHELL = 4; ra="4T$va
public final static int QUICK = 5; WE_jT1^/
public final static int IMPROVED_QUICK = 6; 8VbHZ9Q
public final static int MERGE = 7; V-#OiMWa~
public final static int IMPROVED_MERGE = 8; *Y4h26
public final static int HEAP = 9; I9sx*'
C$9+p@G6
public static void sort(int[] data) { ,QDS_u$xi&
sort(data, IMPROVED_QUICK); r-27AJu
} LaI(
private static String[] name={ /%El0X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .T*K4m{b0
}; :6~DOvY
O}4(v#
private static Sort[] impl=new Sort[]{ 7MRu=Z.-b
new InsertSort(), Gi7jgv{{
new BubbleSort(), 9ghZLQ
new SelectionSort(), 3~zK :(
new ShellSort(), ~]+-<O^U~
new QuickSort(), }LXS!Ff:
new ImprovedQuickSort(), 3=6`'PKRQ
new MergeSort(), I) mP?
new ImprovedMergeSort(), mcbr3P
new HeapSort() ds@w=~
}; ~VNN
64qm
public static String toString(int algorithm){ -P|EV|8=
return name[algorithm-1]; oV4+w_rrLc
} S >E|A%
Y)?dq(
public static void sort(int[] data, int algorithm) { "`b"PQ<x
impl[algorithm-1].sort(data); n5nV461U
} @,Je*5$o"
#41fRmzC
public static interface Sort { HPc7Vo(
public void sort(int[] data); deD%E-Ja
} r"yA=d'c
JsNqijVC
public static void swap(int[] data, int i, int j) { F[q:jY
int temp = data; ye-o'%{
data = data[j]; ^P5+ _P
data[j] = temp; jy=dB-&
} #[.vfG
} w]Q0}Z