[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; oB9t&yM
} <Sxsmf0"
int i1=l; S ("Zzq`
int i2=mid+1; `O-LM e
for(int cur=l;cur<=r;cur++){ E"ju<q/Q
if(i1==mid+1) %-~W|Y
data[cur]=temp[i2++]; RU>Hr5ebo
else if(i2>r) {VWUK`3
data[cur]=temp[i1++]; '4PAH2&n
else if(temp[i1] data[cur]=temp[i1++]; B,sv! p+q5
else ;4jRsirx9
data[cur]=temp[i2++]; -+1it
} Luxo,Ve
} 32_{nLV$[
]w _,0q
} #;bpxz1lR9
lO/<xSjNd
改进后的归并排序: {~*aXu3
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package org.rut.util.algorithm.support; :@PM+[B|Q
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import org.rut.util.algorithm.SortUtil; '1)BZ!
-e=p*7']
/** 2Wlk]
* @author treeroot )k F/"'o
* @since 2006-2-2 VjU;[
* @version 1.0 RUTlwTdv
*/ eSZS`(#!(
public class ImprovedMergeSort implements SortUtil.Sort { 0G/VbS
9wP_dJvb
private static final int THRESHOLD = 10; %K^l]tWa@
Cc:4n1|]>
/* ~L!*p0dS^
* (non-Javadoc) $tyF(RybG
* 'hl>pso.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fI%+
*/ (~/VP3.S
public void sort(int[] data) { Q)\7(n
int[] temp=new int[data.length]; qvz2u]IOw
mergeSort(data,temp,0,data.length-1); X{rw+!
} 2Mc/ah
F_ ~L&jHP
private void mergeSort(int[] data, int[] temp, int l, int r) { <{7CS=)
int i, j, k; .BGM1ph}~
int mid = (l + r) / 2; v*%#Fp,g8
if (l == r) QRnkj]b
return; jsSxjf;O
if ((mid - l) >= THRESHOLD) :ho)3kB
mergeSort(data, temp, l, mid); yH>`Kbf T
else !|`G<WD
insertSort(data, l, mid - l + 1); R}F0_.
if ((r - mid) > THRESHOLD) }LS:f,1oGp
mergeSort(data, temp, mid + 1, r); `r+"2.z*
else ZCi~4&Z#
insertSort(data, mid + 1, r - mid); (#* 7LdZ
"Mgx5d
for (i = l; i <= mid; i++) { |pJ)w
temp = data; ua1ov7w$]
} ryzz!0l
for (j = 1; j <= r - mid; j++) { f3e#.jan
temp[r - j + 1] = data[j + mid]; ; >3q@9\D
} uR{HCZ-
int a = temp[l]; ~lMw*Qw^
int b = temp[r]; 3*$A;%q
for (i = l, j = r, k = l; k <= r; k++) { JqTkNKi/s
if (a < b) { 2g1[E_?
data[k] = temp[i++]; jC1mui|Y^
a = temp; R6HMi#eF
} else { |ofegO}W7
data[k] = temp[j--]; UKp- *YukT
b = temp[j]; m"\jEfjO
} T9]|*~ ,T
} J&}/Xw)
} 9^h\vR|]S
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/** Z^,C><Yt
* @param data />;1 }
* @param l jr{C/B}
* @param i `O(ec
*/ ZzLmsTtzIu
private void insertSort(int[] data, int start, int len) { -}0S%|#m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y0>asl
} mh]'/C_*<w
} LAeJz_9U
} |cStN[97%
} kA?a}
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堆排序： ZB GLwe
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package org.rut.util.algorithm.support; Mit,X
xy$73K6
import org.rut.util.algorithm.SortUtil; gO%#'Eb2
,<F=\G_f
/** 1C\OL!@L
* @author treeroot NR-d|`P;
* @since 2006-2-2 F<q'ivj:w
* @version 1.0 ?|'+5$
*/ %`%oupqm+
public class HeapSort implements SortUtil.Sort{ c^vPd]Ed
7l> |G,[c
/* (non-Javadoc) mZ 39 s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *LpEH,J
*/ e*p7(b-
public void sort(int[] data) { CI"7* z_
MaxHeap h=new MaxHeap(); HQ~`ha.
h.init(data); ,/AwR?m
for(int i=0;i h.remove(); O,R5csMh
System.arraycopy(h.queue,1,data,0,data.length); Y-\hV6v6
} 0 3fCn"
t!QuM_i3
private static class MaxHeap{ )o)<5Iqh
E8gXa-hv
void init(int[] data){ 4Gs#_|!
this.queue=new int[data.length+1]; ehk5U,d
for(int i=0;i queue[++size]=data; 3~Od2nk(x
fixUp(size); &<6E*qM
} DhY.5
} D+ mZ7&L
Qb<i,`SN
private int size=0; yG\^PD
[P.M>"c\
private int[] queue; 0+MNu8t
m3W:\LTTp
public int get() { |57u;
return queue[1]; r/zuo6"5
} d%_=r." Y
.[&0FHnJ5
public void remove() { )!.ef6|
SortUtil.swap(queue,1,size--); -4ry)isYx
fixDown(1); FJ0Ity4u6
} CXt9 5O?
file://fixdown ]j> W9n?
private void fixDown(int k) { p=%Vo@*]
int j; JPQWRK^
while ((j = k << 1) <= size) { :T^!<W4
if (j < size %26amp;%26amp; queue[j] j++; /(IV+
if (queue[k]>queue[j]) file://不用交换 Aq'yr,
break; < kyT{[e+6
SortUtil.swap(queue,j,k); 9A_{*E(wd
k = j; "fK`F/
} TNe,'S,%
} X`#,*HkK
private void fixUp(int k) { HJ#3wk"W
while (k > 1) { 4=/5
int j = k >> 1; S(NH# ^
if (queue[j]>queue[k]) ]0v;;PfVl6
break; j>jZg<}J
SortUtil.swap(queue,j,k); N(i%Oxp1
k = j; PWeCk2xH
} ?bFP'.
} ,b[}22
BGM5pc (ei
} 8vQGpIa,
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} 'Cv,:Q
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SortUtil： <Z{pjJ/
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package org.rut.util.algorithm; GJZGHUB=>
Zop3[-
import org.rut.util.algorithm.support.BubbleSort; % mP%W<
import org.rut.util.algorithm.support.HeapSort; )ph**g
import org.rut.util.algorithm.support.ImprovedMergeSort; &O|!w&
import org.rut.util.algorithm.support.ImprovedQuickSort; J%VcvBaJm
import org.rut.util.algorithm.support.InsertSort; D5]AL5=Xt2
import org.rut.util.algorithm.support.MergeSort; [6 d~q]KH
import org.rut.util.algorithm.support.QuickSort; (!b_o A8V
import org.rut.util.algorithm.support.SelectionSort; feJzX*u
import org.rut.util.algorithm.support.ShellSort; LDg"s0n#
'XW[uK]w)
/** b1+6I_u.
* @author treeroot ;8F|Q<`pV
* @since 2006-2-2 sk'<K5~
* @version 1.0 Zl,c+/
*/ E}Ir<\
public class SortUtil { s*'L^>iZ
public final static int INSERT = 1; 8aDSRfv*
public final static int BUBBLE = 2; #+VH]7]
public final static int SELECTION = 3; ^b{-y
public final static int SHELL = 4; P9d%80(b4
public final static int QUICK = 5; b5!\"v4c
public final static int IMPROVED_QUICK = 6; IE;Fu67wi
public final static int MERGE = 7; C\-Abqc
public final static int IMPROVED_MERGE = 8; Lj]I7ICNh
public final static int HEAP = 9; N=2BrKb)o
(tZ#EL0
public static void sort(int[] data) { hbZ]DRg
sort(data, IMPROVED_QUICK); %62W[Oh5
} ,/m@<NyK
private static String[] name={ tKr.{#)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^oZz,q
}; :ik$@5wp
VV_Zrje
private static Sort[] impl=new Sort[]{ Vgh;w-a
new InsertSort(), M<Gr~RKmAn
new BubbleSort(), 4Sj;38F .1
new SelectionSort(), D\~s$.6B
new ShellSort(), "hE/f~\
new QuickSort(), ;HKb
new ImprovedQuickSort(), / 7i>0J]
new MergeSort(), 7z.(pg=
new ImprovedMergeSort(), }"$2F0
new HeapSort() d]3c44kkK{
}; ]^f7s36
;q=0NtCS=4
public static String toString(int algorithm){ ZQL4<fy'E
return name[algorithm-1]; 8Ce|Q8<8]
} ,^Cl?\9"
su?{Cj6*
public static void sort(int[] data, int algorithm) { \vH /bL
impl[algorithm-1].sort(data); \hlQu{q.
} %NyV2W=~X
qVHXZdGL
public static interface Sort { S_Tv Ix/7&
public void sort(int[] data); bCV3h3<
} v?BVUH>#9
*qX!
public static void swap(int[] data, int i, int j) { 4$5d*7
int temp = data; /J0YF
data = data[j]; kiah,7V/
data[j] = temp; |"K<
} |8QXjzH
} ^#6"d+lp