[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; @9|hMo
} J9S>yLQK
int i1=l; \z} Ic%Tp
int i2=mid+1; f(7GX3?
for(int cur=l;cur<=r;cur++){ X#;bh78&-
if(i1==mid+1) Ny)X+2Ae
data[cur]=temp[i2++]; ~WV"SaA)*U
else if(i2>r) JOBhx)E
data[cur]=temp[i1++]; R0-j5&^jju
else if(temp[i1] data[cur]=temp[i1++]; Yc*;/T}
else cj5+NM"
data[cur]=temp[i2++]; "U"Z 3*
} Q#zmf24W
} R@rBEW&
A&jlizN7
} y4fdq7i~}9
j"Pv0tehw
改进后的归并排序: sCHJ&>m5-
W `}Rf\g
package org.rut.util.algorithm.support; 9'q*:&qq
>[*qf9$
import org.rut.util.algorithm.SortUtil; H$4:lH&(
[!OxZ!
/** P7~>mm+
* @author treeroot i~J'%a<Qp
* @since 2006-2-2 pz>>)c`
* @version 1.0 I,8Er2;)
*/ ?6Y?a2 |
public class ImprovedMergeSort implements SortUtil.Sort { \)|hogI|f
4{`{WI{
private static final int THRESHOLD = 10; ^y%T~dLkp'
^gnZ+`3
/* gB'6`'
* (non-Javadoc) E?0%Z&1h
* BThrO d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d/DB nZN
*/ _5N]B|cO
public void sort(int[] data) { S^\Vgi(
int[] temp=new int[data.length]; 04=c-~&q
mergeSort(data,temp,0,data.length-1); B`J~^+`[*
} CizX<Cr}
BR yl4
private void mergeSort(int[] data, int[] temp, int l, int r) { W:L AP R
int i, j, k; ,nDaqQ-C!!
int mid = (l + r) / 2; "1M[5\Ax
if (l == r) AkQ~k0i}b
return; `RL"AH:+
if ((mid - l) >= THRESHOLD) wDe& 1(T^
mergeSort(data, temp, l, mid); B,epzI
else | h#u^v3
insertSort(data, l, mid - l + 1); 7E~;xn;
if ((r - mid) > THRESHOLD) ,1o FPa{?
mergeSort(data, temp, mid + 1, r); %Y*Ndt4
else &FN.:_E
insertSort(data, mid + 1, r - mid); F@B]et7
|4 0`B% Z
for (i = l; i <= mid; i++) { :E )>\&
temp = data; 9m~p0ILh
} 338k?nHxv
for (j = 1; j <= r - mid; j++) { p4 ^yVa
temp[r - j + 1] = data[j + mid]; N64dO[op
} 68WO~*
int a = temp[l]; .jjG(L
int b = temp[r]; P:MT*ra*,
for (i = l, j = r, k = l; k <= r; k++) { mSl.mi(JiZ
if (a < b) { |imM#wF
data[k] = temp[i++]; #fn)k1
a = temp; pYmk1!]/
} else { R|87%&6']
data[k] = temp[j--]; jLHkOk5{:
b = temp[j]; 7}5JDG
} |"CZT#
} w-L=LWL\
} <FkFs{(t
l L@XM2"
/** eF-."1
* @param data [MM~H0=s
* @param l c2 C8g1n
* @param i SP_75BJ
*/ T;a}#56{^
private void insertSort(int[] data, int start, int len) { +.b,AqJ/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aP@N)"
} ,CcV/K
} 6Vnsi%{
} x}I+Iggi
} }?_?V&K|
V1`o%;j
堆排序： A>;bHf@
!6O(-S2A
package org.rut.util.algorithm.support; dhf!o0'1M
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import org.rut.util.algorithm.SortUtil; Eib5
+RMSA^
/** qUW! G&R
* @author treeroot oC: {aK6\
* @since 2006-2-2 x$.^"l-vX
* @version 1.0 yT"Eq"7/Y#
*/ w3obIJm
public class HeapSort implements SortUtil.Sort{ {{D)YldtA
H.|#c^I
/* (non-Javadoc) }1c|gQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 17[3/m8a
*/ RYQR(v
public void sort(int[] data) { ~IfJwBn-i
MaxHeap h=new MaxHeap(); z2_*%S@
h.init(data); 6azGhxh
for(int i=0;i h.remove(); 7cT~oV !G_
System.arraycopy(h.queue,1,data,0,data.length); t~EPn.
} 2W96Zju\
+_?hK{Ib"
private static class MaxHeap{ *yt=_Q
F|o:W75
void init(int[] data){ V6&!9b
this.queue=new int[data.length+1]; 0w\zLU
for(int i=0;i queue[++size]=data; vMi;+6'n>
fixUp(size); 'EEJU/"u
} {W=%U|f
} QT< }] 0
,.83m%i
private int size=0; jk; clwyz/
B:;pvW]
private int[] queue; |mdVdD~go
M=.n7RY-
public int get() { iZ3IdiZ
return queue[1]; /og=IF2:
} @;zl
[fya)}
public void remove() { '8RsN-w
SortUtil.swap(queue,1,size--); (>UZ<2GPL
fixDown(1); $<dH?%!7
} :t"^6xt
file://fixdown fnjPSts0
private void fixDown(int k) { <Dl*l{zba
int j; *KZYv=s,u
while ((j = k << 1) <= size) { 6"LcJ%o
if (j < size %26amp;%26amp; queue[j] j++; 1y4|{7bb
if (queue[k]>queue[j]) file://不用交换 ajbA\/\G;
break; acajHs
SortUtil.swap(queue,j,k); 4x=v?g&
k = j; fa jGZyd0:
} .;y.]Z/;
} p,5i)nEFj
private void fixUp(int k) { .LPV#&
while (k > 1) { f O}pj:
int j = k >> 1; d\&U*=
if (queue[j]>queue[k]) [`#CXq'
break; s[RAHU
SortUtil.swap(queue,j,k); 4M=]wR;
k = j; (R[[Z,>w.
} n*R])=F@c
} @N>\|!1CC
ttaM.
} B?eCe}*f;B
f&NgS+<K$
} A9KET$i@v
WA<v9#m
SortUtil： JU4<|5H
oM X
package org.rut.util.algorithm; >2Y=*K,:
!4ocZmj\
import org.rut.util.algorithm.support.BubbleSort; _>o:R$ %}
import org.rut.util.algorithm.support.HeapSort; f$o_e90mu
import org.rut.util.algorithm.support.ImprovedMergeSort; $f$SNx)),
import org.rut.util.algorithm.support.ImprovedQuickSort; frm>4)9+
import org.rut.util.algorithm.support.InsertSort; I }a`0Y&{
import org.rut.util.algorithm.support.MergeSort; *l(7D(#
import org.rut.util.algorithm.support.QuickSort; i7CX65&b
import org.rut.util.algorithm.support.SelectionSort; %HhBt5w
import org.rut.util.algorithm.support.ShellSort; 'NbHa!
mtpeRVcF
/** Zcey|m*|
* @author treeroot 6lZ3tdyNo
* @since 2006-2-2 ,X?{07gH
* @version 1.0 "syI#U{
*/ xf'V{9*
public class SortUtil { W Tcw4
public final static int INSERT = 1; w$>u b@=
public final static int BUBBLE = 2; a)!o @
public final static int SELECTION = 3; :ffY6L+
public final static int SHELL = 4; b3P+H r
public final static int QUICK = 5; 8%:Iv(UMk
public final static int IMPROVED_QUICK = 6; #QZe,"C9`
public final static int MERGE = 7; 2zX]\s?3
public final static int IMPROVED_MERGE = 8; ~EW(Gs!=C
public final static int HEAP = 9; PgAf\.48a
TbMW|0 #w
public static void sort(int[] data) { O4 w(T
sort(data, IMPROVED_QUICK); RCJ|P~*
} eB2a-,
private static String[] name={ D2#ZpFp"h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -$\y_?}
}; OUE(I3_
iG$!6;w<
private static Sort[] impl=new Sort[]{ Q;Ak4[
new InsertSort(), 53_Hl]#qZ
new BubbleSort(), K&u_R
new SelectionSort(), Z<oaK
new ShellSort(), eb"VE%+Hu
new QuickSort(), 5; C|
new ImprovedQuickSort(), _r#Z}HK
new MergeSort(), *YI98
new ImprovedMergeSort(), P-[-pi@
new HeapSort() 5{TsiZh4
}; hXw]K"
x%=si[P
public static String toString(int algorithm){ a9e>iU
return name[algorithm-1]; T}Tp$.gB
} S E<FL/x1#
goNG' o %|
public static void sort(int[] data, int algorithm) { _>?\DgjH
impl[algorithm-1].sort(data); z9f-.72"X
} R>|{N9
m[osg< CR_
public static interface Sort { cdH>n)
public void sort(int[] data); !vi>U|rh
} j8i[ONq^
_rMg}F"
public static void swap(int[] data, int i, int j) { b#c:u2
int temp = data; 'ycJMYP8
data = data[j]; ^S<Y>Nm]
data[j] = temp; UBKu/@[f@
} ]OhiYU4
} Jumgb