[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; ;J:YNup
} p81~Lk*Hz@
int i1=l; JBqzQ^[n
int i2=mid+1; j EX([J1
for(int cur=l;cur<=r;cur++){ ]Vubz54
if(i1==mid+1) _^B+Xo@E-
data[cur]=temp[i2++]; &HE8O}<>
else if(i2>r) REJ}T:
data[cur]=temp[i1++]; .F]6uXd
else if(temp[i1] data[cur]=temp[i1++]; HZm44y$/
else [x&&N*>N
data[cur]=temp[i2++]; 1Dbe0u
} t :_7O7
} wNPZ[V:
|(/"IS]
} F"q3p4-<>
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改进后的归并排序: mb#)w`<
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package org.rut.util.algorithm.support; (z[cf|he
:KFhryN
import org.rut.util.algorithm.SortUtil; 4]cOTXk9C
3K'3Xp@A
/** q/[)mr|~
* @author treeroot @cx!m
* @since 2006-2-2 i55']7+0
* @version 1.0 eRf8'-"#-
*/ +5Mx0s(5
public class ImprovedMergeSort implements SortUtil.Sort { w9 NUm
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private static final int THRESHOLD = 10; ev; &$Hc
O&)Y3O1
/* 33; ytd
* (non-Javadoc) Nb$)YMbA
* `1P &
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WN0^hDc-
*/ m?csake.Me
public void sort(int[] data) { wiutUb Y
int[] temp=new int[data.length]; ' ft |
mergeSort(data,temp,0,data.length-1); X9P-fF?0
} PBUc9/
F2u{Wzr_@
private void mergeSort(int[] data, int[] temp, int l, int r) { bZ389dSn
int i, j, k; kqyY:J
int mid = (l + r) / 2; Jlzhn#5c-
if (l == r) }/=VnCfU
return; NZl0sX.:
if ((mid - l) >= THRESHOLD) ur'A;B
mergeSort(data, temp, l, mid); GUK/Xiu
else qvT9d7x
insertSort(data, l, mid - l + 1); cgU7)`0j
if ((r - mid) > THRESHOLD) A_[65'*b
mergeSort(data, temp, mid + 1, r); =.uE(L`]NA
else }NUP[%
insertSort(data, mid + 1, r - mid); 8T%z{A1T
old}}>_
for (i = l; i <= mid; i++) { +pE-Yn`YS
temp = data; O9qEKW)a
} vX{]_
for (j = 1; j <= r - mid; j++) { $GcVC (]
temp[r - j + 1] = data[j + mid]; Uzc`,iV$
} rod{77
int a = temp[l]; K(_nfE{
int b = temp[r]; ?&Lb6(}e
for (i = l, j = r, k = l; k <= r; k++) { /JvNJ f
if (a < b) { kY*D s;
data[k] = temp[i++]; Pp}j=$&j\
a = temp; `=FfzL
} else { X&K1>dgWP
data[k] = temp[j--]; kefQH\<X
b = temp[j]; ?&N JN/+%
} #vIF]Y
} IQR?n}ce
} wc ^z9y
S3 &L
/** TEY%OIzU+
* @param data M*t{?o/t;
* @param l RhYf+?2
* @param i 7VR+EV
*/ .~Td/o7
private void insertSort(int[] data, int start, int len) { A$ s4Q0Mf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vmL0H)q
} ba ,2.|
} @o_-UsUX
} R7vO,kZ6Q
} )4DF9JpD
xvb5-tK -
堆排序： oas}8A)
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package org.rut.util.algorithm.support; }VyDX14j
xFgY#F
import org.rut.util.algorithm.SortUtil; aj1Zi3h
TJ+yBMd*%
/** 3C5<MxtK
* @author treeroot edA.Va|0
* @since 2006-2-2 }"A.[9 b
* @version 1.0 |E|d"_Ma
*/ $yG=exh3v
public class HeapSort implements SortUtil.Sort{ y_QK _R<f
3^C
/* (non-Javadoc) *;Sj&O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b1_HDC(
*/ *_@8v?
public void sort(int[] data) { _},u[+
MaxHeap h=new MaxHeap(); .h{`e>d
h.init(data); B!6?+<J"
for(int i=0;i h.remove(); yyG:Kl
System.arraycopy(h.queue,1,data,0,data.length); G9d@vu
} E7ixl~
.I<#i9Le
private static class MaxHeap{ I)T]}et
Ub0g{
void init(int[] data){ *GD?d2.6j
this.queue=new int[data.length+1]; R0AVAUG
for(int i=0;i queue[++size]=data; <w<&,xM
fixUp(size); p"3_u;cN
} e0qU2
} D&$%JT'3
dy`K5lC@
private int size=0; {e,S}:$g4
6_rS!X
private int[] queue; UhXZ^k3
SCZtHEl9
public int get() { 83e{rcs
return queue[1]; p%ek)tT
} \$W>@w0
J1KV?aR
public void remove() { \= =rdW-
SortUtil.swap(queue,1,size--); p78X,44xg
fixDown(1); >Ta|#]{
} {L4ta~2/T
file://fixdown ]gx]7
private void fixDown(int k) { CM|?;PBuv
int j; c/%i,N\5
while ((j = k << 1) <= size) { cba~
if (j < size %26amp;%26amp; queue[j] j++; 6O>NDTd%
if (queue[k]>queue[j]) file://不用交换 -lAX-W0
break; h`;w/+/Zr
SortUtil.swap(queue,j,k); %dw@;IZ#8{
k = j; fIWOo >)D
} 4'_PLOgnX
} 1U^;fqvja
private void fixUp(int k) { TldqF BX
while (k > 1) { Q!9AxM2K
int j = k >> 1; Z]jm.'@z@
if (queue[j]>queue[k]) 5R"iF+p4
break; tY'fFz^Ho
SortUtil.swap(queue,j,k); fq-e2MCX5
k = j; ezS@LFaA
} q&]I
} t4X:I&l-M:
DSf
} dn!#c=
]rY:C "#
} \jH^OXxb
jbZ%Y0km%
SortUtil： gE;r;#Jt4
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package org.rut.util.algorithm; pbJC A&
P+K< /i
import org.rut.util.algorithm.support.BubbleSort; ^--kcTiR%
import org.rut.util.algorithm.support.HeapSort; _!2bZ:emG
import org.rut.util.algorithm.support.ImprovedMergeSort; =n7QLQU
import org.rut.util.algorithm.support.ImprovedQuickSort; :|%k*z
import org.rut.util.algorithm.support.InsertSort; %zsY=qT
import org.rut.util.algorithm.support.MergeSort; @A?Ss8p'
import org.rut.util.algorithm.support.QuickSort; tX)l_?jVH
import org.rut.util.algorithm.support.SelectionSort; R+}7]tva6C
import org.rut.util.algorithm.support.ShellSort; aGSix}b1P
8=\}#F
/** dX^ ^ @7
* @author treeroot (]ToBju
* @since 2006-2-2 \2]M&n GT
* @version 1.0 qD!qSM
*/ ,E ]vM&
public class SortUtil { O1xK\ogv
public final static int INSERT = 1; Ww\M3Q`h
public final static int BUBBLE = 2; bYt[/K,
public final static int SELECTION = 3; 0[E}[{t`
public final static int SHELL = 4; 5\S s`#g
public final static int QUICK = 5; ^6g^ Q*"
public final static int IMPROVED_QUICK = 6; .0 }eg$d
public final static int MERGE = 7; }Y9= 3X
public final static int IMPROVED_MERGE = 8; x6N)T4J(
public final static int HEAP = 9; |0^~S
EIdEXAC(
public static void sort(int[] data) { ' ?tx?t
sort(data, IMPROVED_QUICK); 8U86-'Pq
} EnW}>XN
private static String[] name={ ,r_%p<lOFu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?/3'j(Gk
}; b}<?& @
Z/G`8|A
private static Sort[] impl=new Sort[]{ 8=kIN-l_
new InsertSort(), #X 1 GL
new BubbleSort(), ;8Qx~:c
new SelectionSort(), |[./jg"
new ShellSort(), ; ,9:1.L
new QuickSort(), XSOSy2:
new ImprovedQuickSort(), ,9~=yC
new MergeSort(), e2F{}N
new ImprovedMergeSort(), b';oFUU>Q
new HeapSort() a)lS)*Y
}; ;+;%s D
P z< \q;
public static String toString(int algorithm){ "WF@T
return name[algorithm-1]; T@H<Fm_
} Te d1Ky2O
xky +"
public static void sort(int[] data, int algorithm) { Mj!g1Q
impl[algorithm-1].sort(data); #EG$HX]
} wa1Qt
y\?NB:=%
public static interface Sort { z*,J0)<Q
public void sort(int[] data); A r,fmq
} o{[w6^D7
|&u4Q /0
public static void swap(int[] data, int i, int j) { 6Cj$x.-K
int temp = data; nF1}?
data = data[j]; W#Eg\nT
data[j] = temp; [%LIW%t|
} 5.M82rR;~
} 2e?a"Vss