[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; pMT7/y-
} QL8C!&=
int i1=l; 7Tk//By7
int i2=mid+1; kJmwR
for(int cur=l;cur<=r;cur++){ fD@d.8nXd
if(i1==mid+1) Xr=BxBttp
data[cur]=temp[i2++]; F(n<:TvlK
else if(i2>r) ;U>nj],uv
data[cur]=temp[i1++]; IQU1 JVkZ
else if(temp[i1] data[cur]=temp[i1++]; CPZ,sWg5
else Xuu&`U~%
data[cur]=temp[i2++]; ..5~x~O
} Hk;;+'-
} W6T4Zsg
KO=$Hr?f;
} G+N1#0,q
1iY4|j;ahV
改进后的归并排序: ~\(c;J*Ir
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package org.rut.util.algorithm.support; }0pp"[JU
j7ZxA*
import org.rut.util.algorithm.SortUtil; _|US`,kfc
5H.~pc2y
/** +Kb 7N, "
* @author treeroot xh:I]('R
* @since 2006-2-2 R/x3+_.f
* @version 1.0 h#Z["BG
*/ {Vj&i.2,
public class ImprovedMergeSort implements SortUtil.Sort { OGg\VV'
F/ZFO5C%
private static final int THRESHOLD = 10; |P]W#~Y-
V K6D
/* we[+6Z6J
* (non-Javadoc) D(ItNMcKu
* =s":Mx,o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rlR!Tc>
*/ Fc@R,9
public void sort(int[] data) { "'bl)^+?,
int[] temp=new int[data.length]; YA,~qT|
mergeSort(data,temp,0,data.length-1); 3as=EYm
} d eT<)'"
nrMW5>&-`
private void mergeSort(int[] data, int[] temp, int l, int r) { >)<?
int i, j, k; }P?e31@:
int mid = (l + r) / 2; 0&sa#g2
if (l == r) SbGdcCB
return; yn}Dj9(q
if ((mid - l) >= THRESHOLD) H;4QuB'^
mergeSort(data, temp, l, mid); ,B'=$PO%
else }},0#Ap
insertSort(data, l, mid - l + 1); ?D.+D(
if ((r - mid) > THRESHOLD) _M/N_Fm
mergeSort(data, temp, mid + 1, r); #?w07/~L
else =_#b .8K
insertSort(data, mid + 1, r - mid); $,@}%NlHc
g_cED15
for (i = l; i <= mid; i++) { x3&gB`j-
temp = data; GGEM&0*
} iGhvQmd(/*
for (j = 1; j <= r - mid; j++) { qZ^ PC-
temp[r - j + 1] = data[j + mid]; 0\:=KIY.
} x7/Vf,N
int a = temp[l]; ]Z5m_-I
int b = temp[r]; R?iCJ5m
for (i = l, j = r, k = l; k <= r; k++) { Cg]|x+
if (a < b) { KV$&qM.
data[k] = temp[i++]; 6=]Gom&S
a = temp; Q~nVbj?c2v
} else { ':pDlUA
data[k] = temp[j--]; ns>$
b = temp[j]; A .&c>{B7
} RJ@79L*#
} ?)-6~p 4N
} Mc.{I"c@
|gI>Sp%Fu
/** pFS@yHs
* @param data **%&|9He
* @param l $x'jf?zs!
* @param i pL1ABvBB
*/ BS fmS(.
private void insertSort(int[] data, int start, int len) { rQ{|0+l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zA9q`ePS
} 4,LS08&gh
} Kg';[G\
} l%2VA
} Kj4BVs
7FoX)54"
堆排序： Y:;_R=M
9SsVJ<9,R
package org.rut.util.algorithm.support; `{!A1xKZ
Hi={(Z5tC4
import org.rut.util.algorithm.SortUtil; SX"|~Pi(
uX_#NP/2
/** cEu_p2(7!B
* @author treeroot B1_9l3RM
* @since 2006-2-2 gZtQtFi
* @version 1.0 Ob]\t/:%P
*/ b5)^g+8)w
public class HeapSort implements SortUtil.Sort{ Q,5PscE6&k
_C5i\Y)
/* (non-Javadoc) \)/qCeiZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e#Ao]gc
*/ jdG2u p
public void sort(int[] data) { <&b,%O
MaxHeap h=new MaxHeap(); G,!jP2S
h.init(data); ^slIR!L
for(int i=0;i h.remove(); LSc^3=X
System.arraycopy(h.queue,1,data,0,data.length); 8_!qoW@B
} ,nYa+e
?I^$35
private static class MaxHeap{ h@R n)D
0]7jb_n1
void init(int[] data){ 6Sd:5eTEQ
this.queue=new int[data.length+1]; M,JwoKyg
for(int i=0;i queue[++size]=data; }PK4 KRn
fixUp(size); K*j OrQf`
} o4p5`jOG@
} [Ix6ArY
f?.VVlD
private int size=0; )8oyo~4?
.t\J@?Z
private int[] queue; L;opQ~g
ra*|HcLD
public int get() { 6<W^T9}v@/
return queue[1]; h>!h|Ma
} &6CDIxH{
A[m?^vk q
public void remove() { YaS!YrpI
SortUtil.swap(queue,1,size--); Ne+Rs+~4
fixDown(1); #d %v=.1
} OE(y$+L3_I
file://fixdown D Z*c.|W
private void fixDown(int k) { /E<Q_/'Z
int j; 9e`};DE
while ((j = k << 1) <= size) { ,]0BmlD
if (j < size %26amp;%26amp; queue[j] j++; <fHHrmZ#/.
if (queue[k]>queue[j]) file://不用交换 T%%EWa<a
break; P s>Y]
SortUtil.swap(queue,j,k); dHx4yFS
k = j; [xM&Jdf8
} ,M`1 k
} uq]=L
private void fixUp(int k) { Q<6* UUQm
while (k > 1) { +ZjDTTk
int j = k >> 1; 25Z}.))
if (queue[j]>queue[k]) W]Xwt'ABz
break; T4:H:
SortUtil.swap(queue,j,k); MMrN#&r
k = j; @Pc7$qD%
} GjwH C{
} $MDmY4\
GCYXDovh
} |e#W;q$v
^!^M Gzu
} -sv%A7i
r jn:E
SortUtil： *^@b0f~vj
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package org.rut.util.algorithm; k 76<CX
CP9Q|'oJ
import org.rut.util.algorithm.support.BubbleSort; u^SInanw
import org.rut.util.algorithm.support.HeapSort; C1f$^N
import org.rut.util.algorithm.support.ImprovedMergeSort; W3/] 2"0
import org.rut.util.algorithm.support.ImprovedQuickSort; ]+,L/P
import org.rut.util.algorithm.support.InsertSort; U0-RG
import org.rut.util.algorithm.support.MergeSort; . h)VR 5?j
import org.rut.util.algorithm.support.QuickSort; mQVlE__ub
import org.rut.util.algorithm.support.SelectionSort; ,1 H|{<
import org.rut.util.algorithm.support.ShellSort; 1ik.|T<f0
/ :.I&^>P
/** >{Ayzz>v
* @author treeroot }~LGq.H
* @since 2006-2-2 N}/V2K]Q
* @version 1.0 +vJ}'uR3P
*/ g \S6>LG!
public class SortUtil { TXYO{
public final static int INSERT = 1; z4D)Xy"/
public final static int BUBBLE = 2; 'J*'{
public final static int SELECTION = 3; q<.k:v&
public final static int SHELL = 4; U^[AW$WzU
public final static int QUICK = 5; i;~.kgtq4
public final static int IMPROVED_QUICK = 6; :-59~8&
public final static int MERGE = 7; W"s/8;
public final static int IMPROVED_MERGE = 8; nT:<_'!
public final static int HEAP = 9; p&\QkI=
pFMJG<W9,
public static void sort(int[] data) { OD[=fR|cp
sort(data, IMPROVED_QUICK); U&(gNuR>J
} :s+?"'DP
private static String[] name={ k {{eyC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ._p2"<
}; IIMf\JdM
< (9 BO&
private static Sort[] impl=new Sort[]{ %ho?KU2j
new InsertSort(), LR.]&(kyd
new BubbleSort(), !_+FuF"@
new SelectionSort(), _)pOkS
new ShellSort(), *eXs7"H
new QuickSort(), OSuQ7V
new ImprovedQuickSort(), KgYQxEbIW
new MergeSort(), IX 6 jb"
new ImprovedMergeSort(), }Uj-R3]}K
new HeapSort() CEkf0%YJ
}; p);[;S
d\Up6F
public static String toString(int algorithm){ <}&J|()
return name[algorithm-1]; !b0A%1W;
} yo_zc<
J s33S)
public static void sort(int[] data, int algorithm) { i0\]^F
impl[algorithm-1].sort(data); #(}{*dR
} FDF DB
x/]G"?Uix
public static interface Sort { 6E^m*la%
public void sort(int[] data); c'?EI EP
} "<egm^Yq
RI'}C`%v
public static void swap(int[] data, int i, int j) { Z8h;3Ek
int temp = data; I^LU*A=
data = data[j]; V`/c#y||
data[j] = temp; ,,j>2Ts
} /w6'tut
} Xeja\5zB