[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; N#Bg`:!
} )#l &F$
int i1=l; hun LV8z
int i2=mid+1; a5{CkM&,(
for(int cur=l;cur<=r;cur++){ #m1e_[
if(i1==mid+1) [3>l^Q|#
data[cur]=temp[i2++]; 6|r` k75.
else if(i2>r) *r!1K!c
data[cur]=temp[i1++]; wh l)^D
else if(temp[i1] data[cur]=temp[i1++]; W@GcE;#-
else Sdz!J 1
data[cur]=temp[i2++]; j0L9Q|s
} U5jY/e_
} 6*Qn9Q%p-
lY[>}L*H8
} yL^1s\<ddW
[&k[k)
改进后的归并排序: `9B xDp]I
Z`v6DfK}
package org.rut.util.algorithm.support; O66\s q
u`$,S&Er
import org.rut.util.algorithm.SortUtil; %?J\P@
6C9KT;6
/** EJO:3aKa
* @author treeroot L,of@>
* @since 2006-2-2 P1]ucu_y,
* @version 1.0 BhJqMK>'S
*/ pOS:/~I3
public class ImprovedMergeSort implements SortUtil.Sort { RX4O1Z0
b{)9?%_
private static final int THRESHOLD = 10; Hq8<g$
zh2$U dZ|M
/* \/$T 3f`x
* (non-Javadoc) ptQr8[FA
* #!u P>/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G5egyP;
*/ HUr;ysw
public void sort(int[] data) { 4JKB6~Y
int[] temp=new int[data.length]; MI0'ou8l
mergeSort(data,temp,0,data.length-1); s<5q%5ix3
} SE)_5|k*
x~!B.4gT2
private void mergeSort(int[] data, int[] temp, int l, int r) { H@bra~k-
int i, j, k; Bs =V-0
int mid = (l + r) / 2; m=Y9sB
if (l == r) c!T^JZBb
return; HWT0oh]
if ((mid - l) >= THRESHOLD) 73P=<3
mergeSort(data, temp, l, mid); IhwJYPLF
else 9~I\WjB "
insertSort(data, l, mid - l + 1); {J%Na&D
if ((r - mid) > THRESHOLD) N5#qox$D
mergeSort(data, temp, mid + 1, r); }>b4s!k,
else !p >a,8w
insertSort(data, mid + 1, r - mid); nS"K dPM
ZD/>L/
for (i = l; i <= mid; i++) { 9xP{#Qa
temp = data; K20n355uE
} TDBWYppM
for (j = 1; j <= r - mid; j++) { BWFl8 !_X
temp[r - j + 1] = data[j + mid]; *>V6KW
} D{Y~kV|
int a = temp[l]; w5gN8ZF3
int b = temp[r]; 6%H8Qv
for (i = l, j = r, k = l; k <= r; k++) { ^+oi|y
if (a < b) { yZ~<! 5.P
data[k] = temp[i++]; EXH{3E54)`
a = temp; SJoQaR,)>
} else { h>sz@\{
data[k] = temp[j--]; OYzt>hdH
b = temp[j]; #B8`qFpQC
} gP/[=:
} %E?:9. :NJ
} QIQB
[6K2V:6:
/** >/;\{IG Wn
* @param data FXV=D_G}
* @param l #x1AZwC
* @param i @k<RX'~q
*/ k^Zpb&`Hx
private void insertSort(int[] data, int start, int len) { v]F q}I"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N~{0QewMI'
} ;@Ep?S@
} \=Af AO@
} zT#36+_?
} V9-pY/v9
E:V&:9aQ@
堆排序： $^ (q0zR~l
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package org.rut.util.algorithm.support; <*0MD6$5
gGw6c" FRQ
import org.rut.util.algorithm.SortUtil; H$KE*Wwq
8A"[n>931
/** DBAJkBs
* @author treeroot VH4P|w[YF
* @since 2006-2-2 %}%D8-d}G
* @version 1.0 T?!^-PD9*
*/ ehtiu!Vk
public class HeapSort implements SortUtil.Sort{ (M4~N)7<P5
>C+0LF`U
/* (non-Javadoc) 3:<+9X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ky|Hi3?
*/ Jme}{!3m
public void sort(int[] data) { B/q/sC
MaxHeap h=new MaxHeap(); kF3 EJ
h.init(data); 8R`@edj>
for(int i=0;i h.remove(); |2CW!is
System.arraycopy(h.queue,1,data,0,data.length); (6A>:_)
} JmrQDO_(
&UP@Sr0D7
private static class MaxHeap{ B7nMyoj
%2^C
void init(int[] data){ 5IW^^<kiu
this.queue=new int[data.length+1]; -))>7skc
for(int i=0;i queue[++size]=data; [POcO
fixUp(size); YP>VC(f
} &YO5N4X~o
} v|VY5vN
EhEn|%S
private int size=0; ABNsi$]r0
-le:0NUwI
private int[] queue; ^8.R 'Yq
-Hh$3Uv
public int get() { UYW%%5p?
return queue[1]; v!t*Ng
} Vyj>&"28
$Bz|[=
public void remove() { JnhHV(H
SortUtil.swap(queue,1,size--); o%h\55S
fixDown(1); lk \|EG
} 6ecr]=Cv
file://fixdown KZ ?<&x
private void fixDown(int k) { 6Kh:m-E9
int j; 0MMY{@n
while ((j = k << 1) <= size) { ?XsL4HIx
if (j < size %26amp;%26amp; queue[j] j++; Z{chAg\
if (queue[k]>queue[j]) file://不用交换 0vS%m/Zi-
break; [aO"9
SortUtil.swap(queue,j,k); v 8{oXzyy
k = j; Mki(,Y|1~
} cy)L%`(7
} sa#=#0yg
private void fixUp(int k) { $MKx\qx}
while (k > 1) { on*?O O'
int j = k >> 1; V?Lf&X?
if (queue[j]>queue[k]) o80pmy7@
break; x?:WR*5w
SortUtil.swap(queue,j,k); g0rdF
k = j; j!mI9*hP
} aP8Im1<A
} )7q;Fm_/
g]$>G0E`oD
} 5Ag]1k{
1dfA 8=L,s
} '0H+2
5ez"B]&T
SortUtil： 5zpk6FR$
$Y$!nPO
package org.rut.util.algorithm; 2s-f?WetbP
i= ~HXr}
import org.rut.util.algorithm.support.BubbleSort; J2aA"BhdC"
import org.rut.util.algorithm.support.HeapSort; n.$<D[@
import org.rut.util.algorithm.support.ImprovedMergeSort; )K@ 20Q+0K
import org.rut.util.algorithm.support.ImprovedQuickSort; gD=s~DgN)
import org.rut.util.algorithm.support.InsertSort; bT[Q:#GL
import org.rut.util.algorithm.support.MergeSort; @)<uQ S
import org.rut.util.algorithm.support.QuickSort; %E1~I\n:F
import org.rut.util.algorithm.support.SelectionSort; ?j8CkqX!
import org.rut.util.algorithm.support.ShellSort; 'QeqWn
5y=X?hF~)
/** iA^w2K
* @author treeroot A6lf-8ncx
* @since 2006-2-2 sN-5vYfC*
* @version 1.0 TQ=\l*R(A
*/ i`2Q;Az_P6
public class SortUtil { . Nog.
public final static int INSERT = 1; jt3s;U*
public final static int BUBBLE = 2; MuZ\<;W$
public final static int SELECTION = 3; c1|o^eZ
public final static int SHELL = 4; #A:I|Q1$g
public final static int QUICK = 5; xd(AUl4qY
public final static int IMPROVED_QUICK = 6; k]R O=/ ?M
public final static int MERGE = 7; L4Nk+R;
public final static int IMPROVED_MERGE = 8; JB+pd_>5
public final static int HEAP = 9; bn<&Xe
T:;e73
public static void sort(int[] data) { oVl:./(IB
sort(data, IMPROVED_QUICK); <+_OgF1G
} B'yN &3
private static String[] name={ gQ?>%t]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r+m8#uR
}; WgE~H)_%
VrF]X#\)
private static Sort[] impl=new Sort[]{ `Yoafa
new InsertSort(), He#+zE;
new BubbleSort(), _<t3~{qUT
new SelectionSort(), YLPiK
new ShellSort(), H@G7oK
new QuickSort(), O;H/15j:sK
new ImprovedQuickSort(), -uv1$|
new MergeSort(), ocdXzk`
new ImprovedMergeSort(), {zVJlJKxs
new HeapSort() 1O(fI|gcO
}; }[AIE[
N1LR _vS"
public static String toString(int algorithm){ XHN?pVZ7
return name[algorithm-1]; R#1m_6I
} Hd;>k$B
i"JF~6c<
public static void sort(int[] data, int algorithm) { c?q#?K aF
impl[algorithm-1].sort(data); s<<vHzm
} ReSP)%oW
3D<P [.bS
public static interface Sort { !29 Rl`9
public void sort(int[] data); xFg=Tyq:
} %}j/G l5
[c>X Q
public static void swap(int[] data, int i, int j) { Onot<}K
int temp = data; *:YW@Gbm
data = data[j]; 5fVdtJk7
data[j] = temp; 5n(p1OM2q
} CZ]+B8Pl(x
} /3Se*"u