[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; Eo {1y
} KSgQ:_u4}
int i1=l; krr-ZiK
int i2=mid+1; Jl}!CE@-
for(int cur=l;cur<=r;cur++){ C*{15!d:G
if(i1==mid+1) ##`;Eh0a
data[cur]=temp[i2++]; U/3e,`c
else if(i2>r) nF. ;LM
data[cur]=temp[i1++]; yo?g"vbE
else if(temp[i1] data[cur]=temp[i1++]; &Qtp"#{
else f=_Bx2ub
data[cur]=temp[i2++]; b#Fk>j
} M=\d_O#;Z
} (iCZz{l@~
Nn,vdu{^2
} K{=r.W
[I++>4
改进后的归并排序: "]SJbuzh
gQI(=in
package org.rut.util.algorithm.support; tv@Z5
~b>nCP8q
import org.rut.util.algorithm.SortUtil; ;Z!~A"~$>
'{j\0
/** ui.QYAYaV
* @author treeroot ]s*[Lib
* @since 2006-2-2 Bt*&L[&57
* @version 1.0 uFrJ:l+
*/ A{i][1N
public class ImprovedMergeSort implements SortUtil.Sort { U9@t?j_#X{
Lem\UD$D`
private static final int THRESHOLD = 10; (:&&;]sI
X|-v0 f
/* (5Z8zNH`3
* (non-Javadoc) 8g# c%eZ
* c6?c>*z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F;d%@E_Bc
*/ GG@I!2,_
public void sort(int[] data) { YoV^xl6g
int[] temp=new int[data.length]; 7zJrT5
mergeSort(data,temp,0,data.length-1); F,L82N6\U
} R<y Nv
,`%k'ecN
private void mergeSort(int[] data, int[] temp, int l, int r) { D% v:PYf
int i, j, k; FhY{;-W(T
int mid = (l + r) / 2; _q$0lqq~u
if (l == r) %2@ Tj}xa
return; |z!q r}i
if ((mid - l) >= THRESHOLD) Q QsVIHA
mergeSort(data, temp, l, mid); wL8bs- U
else (1kn):
insertSort(data, l, mid - l + 1); Ks49$w<
if ((r - mid) > THRESHOLD) d$"G1u~%
mergeSort(data, temp, mid + 1, r); YZ"+c&V"
else 8CP9DS
insertSort(data, mid + 1, r - mid); 80FCe(U
2_oK5*j
for (i = l; i <= mid; i++) { Zzw}sZ?8
temp = data; 5(iSOsb
} q7O,I`KaJ
for (j = 1; j <= r - mid; j++) { 0%h[0jGj
temp[r - j + 1] = data[j + mid]; ; d, JN
} CU#L *kz
int a = temp[l]; eHVdZ'%x
int b = temp[r]; r!=]Q}`F
for (i = l, j = r, k = l; k <= r; k++) { ;1{iF2jZ:
if (a < b) { %Lh-aP{[e
data[k] = temp[i++]; wE,=%?"
a = temp; RR[)UQ
} else { i$`|Y*
data[k] = temp[j--]; P;)2*:--)
b = temp[j]; >~`Y
} _SMT.lG
} S F&M (=w<
} p<of<YU)
ESC
/** [ -9)T
* @param data V9+xL 1U#
* @param l =Q/w%8G
* @param i W;3 R;
*/ 1?D8|<
private void insertSort(int[] data, int start, int len) { "jl1.Ah
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aNOAu/
} &K9VEMCEX
} ".~MmF
} 5z9r S<
} T!m42EvIvE
$\0cJCQ3
堆排序： jHkyF`<+
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package org.rut.util.algorithm.support; &%|xc{i
i>ESEmb-
import org.rut.util.algorithm.SortUtil; >VRo|o<D
g)=V#Bglv
/** ^;V}l?J_s
* @author treeroot QE7+rBa
* @since 2006-2-2 0=N4O!X9
* @version 1.0 vbr~<JT=
*/ 'P@=/
public class HeapSort implements SortUtil.Sort{ 7j@^+rkr3f
LFEp
/* (non-Javadoc) /`7 IK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E0sbU<11
*/ "_nX5J9
public void sort(int[] data) { +G5'kYzJ
MaxHeap h=new MaxHeap(); 7^kH8qJ)
h.init(data); RtW4n:c
for(int i=0;i h.remove(); >[Xm|A#
System.arraycopy(h.queue,1,data,0,data.length); 2.StG(Y!
} WafdE
Q;XXgX#l
private static class MaxHeap{ fl!mYCPv
/-DKV~
void init(int[] data){ DWF >b
this.queue=new int[data.length+1]; ::p-9F
for(int i=0;i queue[++size]=data; iP~sft6
fixUp(size); +<)tql*
} Tx y]"_
} @;||peU
1k!D0f3qb
private int size=0; h=X7,2/<
5T!&r
private int[] queue; -6uH.
1t0bUf;(M
public int get() { i{<8 hLO
return queue[1]; ! a86iHU
} dj?G.-
V8-4>H}Cb/
public void remove() { YH6snC$u
SortUtil.swap(queue,1,size--); H"2U)HJl
fixDown(1); G i$
} ~&lQNl3`m6
file://fixdown V^j3y`K
private void fixDown(int k) { 2;&mkcK'
int j; ?2H{^\<(e
while ((j = k << 1) <= size) { 613/K`o
if (j < size %26amp;%26amp; queue[j] j++; {]+ jL1
if (queue[k]>queue[j]) file://不用交换 TAXd,z N
break; =fY lzZh
SortUtil.swap(queue,j,k); n(Qj||:
k = j; S{o@QVbl
} .?A'6
} ^/G?QR
private void fixUp(int k) { 8r5xs-
while (k > 1) { DG_}9M!DW@
int j = k >> 1; jjxIS
if (queue[j]>queue[k]) (&q@~ dJ
break; w#W5}i&x
SortUtil.swap(queue,j,k); AdDQWJ^r
k = j; t$aVe"uM
} 6!*K/2:O
} OMl8 a B9
0 9tikj1
} !$xzAX,
!&Z*yH
} uRP Ff77
O\%j56Bf
SortUtil： X d!Cp
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package org.rut.util.algorithm; X)I/%{
3QH(4N
import org.rut.util.algorithm.support.BubbleSort; _\p`4-.V
import org.rut.util.algorithm.support.HeapSort; /#29Y^Z)=
import org.rut.util.algorithm.support.ImprovedMergeSort; wtlB
import org.rut.util.algorithm.support.ImprovedQuickSort; [70Y,,w
import org.rut.util.algorithm.support.InsertSort; wbBE@RU>!
import org.rut.util.algorithm.support.MergeSort; Xz8$Xz,O
import org.rut.util.algorithm.support.QuickSort; <|otZJ'2r
import org.rut.util.algorithm.support.SelectionSort; ! &y
import org.rut.util.algorithm.support.ShellSort; JAN|aCzD
,Ie<'>hd
/** Nc,*hsx'
* @author treeroot fQxSMPWB
* @since 2006-2-2 &Y{F? c^
* @version 1.0 x 96}#0'
*/ l+oDq'[q"
public class SortUtil { bS,etd
public final static int INSERT = 1; KvGbDG
public final static int BUBBLE = 2; S45'j(S=
public final static int SELECTION = 3; yz2(_@R
public final static int SHELL = 4; 'HCnB]1
public final static int QUICK = 5; 5qGGu.$Ihi
public final static int IMPROVED_QUICK = 6; gEE9/\>%-
public final static int MERGE = 7; ,dOMW+{
public final static int IMPROVED_MERGE = 8; u]R$]&<
public final static int HEAP = 9; T{ok +$w2
av$
public static void sort(int[] data) { t`uc3ta"9
sort(data, IMPROVED_QUICK); wtq,`'B
} }lH;[+u3
private static String[] name={ c$/<l5Uw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {JTmP`&l
}; CDJ$hu
Il|GCj*N
private static Sort[] impl=new Sort[]{ ^[0"vtb
new InsertSort(), 8*vFdoE_oO
new BubbleSort(), li@kLh
new SelectionSort(), Urn
new ShellSort(), :u AjV
new QuickSort(), tO7I&LNE
new ImprovedQuickSort(), %U-Qsy8|D)
new MergeSort(), $]Jf0_
new ImprovedMergeSort(), 5|5=Y/
new HeapSort() ad9EG#mD#
}; f:S}h-AL&
A3j"/eKi2
public static String toString(int algorithm){ )x)gHY8;
return name[algorithm-1]; % ^e@`0L
} 3<+z46`?
a`s/qi
public static void sort(int[] data, int algorithm) { =ydpU<aS
impl[algorithm-1].sort(data); <W?WUF
} 7O"hiDQ
("b*? : B
public static interface Sort { %Or2iuO%-,
public void sort(int[] data); _nP)uU$
} w\p9J0
DDWp4`CS|
public static void swap(int[] data, int i, int j) { |ebvx?\
int temp = data; yYg
data = data[j]; 5 1"8Py
data[j] = temp; E3bwyK!s
} X`D+jiQ(f
} p x0Sy|