[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; 3+:uV
} ltXGm)+
int i1=l; Zq\ p%AU9
int i2=mid+1; V?z-Dt C
for(int cur=l;cur<=r;cur++){ )yv~wi
if(i1==mid+1) A,GJ6qp3
data[cur]=temp[i2++]; z_9qT"vF
else if(i2>r) ^p #bxN")
data[cur]=temp[i1++]; 1O@cev;
else if(temp[i1] data[cur]=temp[i1++]; hHqsI`7c
else ~=pyA#VVJ"
data[cur]=temp[i2++]; Bd*\|M
} Fk&A2C}$b
} hUMFfc?
[$%0[;jtS
} DBzF\-
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改进后的归并排序: 0Ewt >~n
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package org.rut.util.algorithm.support; *uZ'MS
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import org.rut.util.algorithm.SortUtil; o|c"W}W
cjBHczkY
/** t)*A#
* @author treeroot {]:B80I;2
* @since 2006-2-2 ^]?Yd)v
* @version 1.0 #Xd#Ncj
*/ =`BPGfCb
public class ImprovedMergeSort implements SortUtil.Sort { Ix|^c268o<
pB0Do6+{
private static final int THRESHOLD = 10; Qx !! Ttd{
-;o`(3wZq
/* b'yW+
* (non-Javadoc) WevXQ-eKm
* %Z6\W; (n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zl`sY5{1
*/ jTq@@y
public void sort(int[] data) { Q##L|*Qy
int[] temp=new int[data.length]; STQ~mFs"
mergeSort(data,temp,0,data.length-1); {_*$X
} >{kPa|
Rk52K*Dc
private void mergeSort(int[] data, int[] temp, int l, int r) { _<G%
int i, j, k; |m>n4-5QL
int mid = (l + r) / 2; ~6:y@4&F
if (l == r) p`LPO
return; cK+y3`.0
if ((mid - l) >= THRESHOLD) r=pb7=M#LN
mergeSort(data, temp, l, mid); e.^Y4(
else 834dsl+U
insertSort(data, l, mid - l + 1); Z8_QKw>
if ((r - mid) > THRESHOLD) {V9}W<
mergeSort(data, temp, mid + 1, r); (Qys`D
else }X*.Vv A
insertSort(data, mid + 1, r - mid); )VCRbz"[g
f:K`MW
for (i = l; i <= mid; i++) { ; +E@h=?
temp = data; U?Icyn3q0
} HFd>UdT%
for (j = 1; j <= r - mid; j++) { vxC,8Z
temp[r - j + 1] = data[j + mid]; auT$-Ki8
} i#y3QCNqf^
int a = temp[l]; 6J%+pt[tu
int b = temp[r]; N8:&v
for (i = l, j = r, k = l; k <= r; k++) { )IP{yL8c
if (a < b) { Sk,9<@
data[k] = temp[i++]; 8q&*tpE
a = temp; C]+T5W\"<B
} else { yD9<-B<)
data[k] = temp[j--]; L]HYk}oD.
b = temp[j]; tqo!WuZAj
} Z'sO9Sg8>
} ?*8HZ1m#
} 5Pl~du
O6pL )6d
/** nob^ I5?
* @param data [,fdNxc8
* @param l &$</|F)y
* @param i 5U/1Z{
*/ f~D> *<L4-
private void insertSort(int[] data, int start, int len) { NTtRz(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :+>:>$ao
} +vtI1LC;_
} A{Q:,S)
} +tXOP|X
} !zNMU$p
C=/nZGG
堆排序： #TX=%x6
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package org.rut.util.algorithm.support; K9y!ZoB
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import org.rut.util.algorithm.SortUtil; NK@G0p~O
&`'gO 9
/** ,\K1cW~U5
* @author treeroot /U%Xs}A)
* @since 2006-2-2 S qQqG3F
* @version 1.0 sm>Hkci%
*/ afMIqQ?
public class HeapSort implements SortUtil.Sort{ JDzkv%E^
d>Z{TFY
/* (non-Javadoc) *?+maK{5+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y(]&j`%
*/ ,1YnWy*
public void sort(int[] data) { #)BdN
MaxHeap h=new MaxHeap(); hFjXgpz5
h.init(data); Tx7YHE6{
for(int i=0;i h.remove(); t*)-p:29h
System.arraycopy(h.queue,1,data,0,data.length); 1+^L,-k!
} Xx0}KJq~"
_;BN;].
private static class MaxHeap{ 4JHFn [%
oIM]
void init(int[] data){ ya'@AJS
this.queue=new int[data.length+1]; /N ^%=G#
for(int i=0;i queue[++size]=data; Dn?P~%
fixUp(size); $W8
} }>:x
} snBC +`-
U!-|.N,
private int size=0; |^ml|cb
<oSk!6*
private int[] queue; e.0vh?{\
<bf^'$l
public int get() { i%W,Y8\uf*
return queue[1]; }q(IKH\&
} +mP3y~|-j
$s hlNW\
public void remove() { P$)9osr
SortUtil.swap(queue,1,size--); |Js96>B:
fixDown(1); 0n_Cuh\
} (o\:rLZu
file://fixdown VYhZ0;' '
private void fixDown(int k) { P,O9On
int j; R9yK"
while ((j = k << 1) <= size) { 3yXF| yV
if (j < size %26amp;%26amp; queue[j] j++; sf?D4UdIH
if (queue[k]>queue[j]) file://不用交换 Lvc*L6
break; 'W$jHs
SortUtil.swap(queue,j,k); ^n<p#0)+a
k = j; e@L'H)w,
} =?57*=]0M
} $xS `i-|
private void fixUp(int k) { ^G#=>&,
while (k > 1) { o"v> BhpC
int j = k >> 1; FI~)ZhE)]
if (queue[j]>queue[k]) b9OT~i=S|
break; :f^O!^N
SortUtil.swap(queue,j,k); ,KIa+&vJW@
k = j; /v;g v[
} iYv6B6o/99
} 0sq/_S
bs]ret$?(q
} q!<`ci,uS
(>>pla^
} qEf)TW(
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SortUtil： *Yvfp{B
mb?DnP,z
package org.rut.util.algorithm; :H\6wJ
tB[(o%k
import org.rut.util.algorithm.support.BubbleSort; {TdKS
import org.rut.util.algorithm.support.HeapSort; !HqIi@>8
import org.rut.util.algorithm.support.ImprovedMergeSort; GwwxSB&y
import org.rut.util.algorithm.support.ImprovedQuickSort; *=S\jek
import org.rut.util.algorithm.support.InsertSort; Ajq;\-:
import org.rut.util.algorithm.support.MergeSort; =o_d2Ak
import org.rut.util.algorithm.support.QuickSort; kd'qYh
import org.rut.util.algorithm.support.SelectionSort; +B_q? 6pR
import org.rut.util.algorithm.support.ShellSort; _QBd3B%
ui70|
/** w_,.
* @author treeroot |RAi6;
* @since 2006-2-2 cPI #XPM=
* @version 1.0 R`ZU'|
*/ aiw~4ix
public class SortUtil { *xU^e`P
public final static int INSERT = 1; 68)z`JI|<)
public final static int BUBBLE = 2; ,Xk8{=
public final static int SELECTION = 3; b\gl9"X
public final static int SHELL = 4; ILF"m;
public final static int QUICK = 5; \#2,1W@
public final static int IMPROVED_QUICK = 6; N iNZh;
public final static int MERGE = 7; Tr/wG
public final static int IMPROVED_MERGE = 8; ?8! 4!P%n
public final static int HEAP = 9; tI{ n!
):LJ {.0R
public static void sort(int[] data) { j^iH[pN] \
sort(data, IMPROVED_QUICK); -&))$h3o\
} PM=I
private static String[] name={ 0gO2^m)W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N##3k-0Ao
}; yW|yZ(7
pVt-7AgW
private static Sort[] impl=new Sort[]{ bU2)pD!N
new InsertSort(), ;n7k_K#0z!
new BubbleSort(), Q`AJR$L
new SelectionSort(), 8dIgw
new ShellSort(), 9<[RXY
new QuickSort(), #5G!lbH
new ImprovedQuickSort(), ,UWO+B]
new MergeSort(), uA:;OM}
new ImprovedMergeSort(), b4ORDU
new HeapSort() b*dRNu
}; j*W]^uT,
>?U(w<
public static String toString(int algorithm){ [_-CO}>
return name[algorithm-1]; RFg$N@g,
} <T
CXCU5-
public static void sort(int[] data, int algorithm) { Ik;~u8j1e
impl[algorithm-1].sort(data); _u{D#mmO
} f} }Bb8
]Z<{ ~
public static interface Sort { uZmfvMr3
public void sort(int[] data); E# e=<R
} G-M!I`P
6<]&T lS]
public static void swap(int[] data, int i, int j) { T{sw{E*
int temp = data; qUpMq:Uw
data = data[j]; IO^O9IEx,
data[j] = temp; <Er|s^C
} wg!
} x-y=Jor