[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; <KCyXU*
} mC0Dj O
int i1=l; w6Mv%ZO_
int i2=mid+1; 3tkCmB
for(int cur=l;cur<=r;cur++){ q%vel.L]%
if(i1==mid+1) fN<Y3^i"
data[cur]=temp[i2++]; DZH2U+K
else if(i2>r) Vl<7>
data[cur]=temp[i1++]; $cm9xW&
else if(temp[i1] data[cur]=temp[i1++]; -GB,g=Dk
else 8$X3J[_j
data[cur]=temp[i2++]; }mUb1b
} TpYh)=;k
} }:J-o
\,v+ejhw
} fuF{8-ua
em- <V5fb
改进后的归并排序: ;$4&Qp:#
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package org.rut.util.algorithm.support; })J}7@VPO
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import org.rut.util.algorithm.SortUtil; 0O]v|
6'<[QoW];
/** Ra H1aS(
* @author treeroot d:#tN4y7(
* @since 2006-2-2 =2} kiLKO
* @version 1.0 ),xD5~_=q
*/ \W= qqE]
public class ImprovedMergeSort implements SortUtil.Sort { n:k4t
M1*bT@6
private static final int THRESHOLD = 10; k{UeY[,jb
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/* &,{YfAxQ`
* (non-Javadoc) 0!$y]Gr
* j4]3}t0q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +"k?G
*/ 5wl;fL~e
public void sort(int[] data) { *0Fz." v
int[] temp=new int[data.length]; 1v,R<1)&
mergeSort(data,temp,0,data.length-1); Eciu^
} 6h %rt]g
6CW5ay_,
private void mergeSort(int[] data, int[] temp, int l, int r) { r`h".=oD
int i, j, k; "h7Dye
int mid = (l + r) / 2; ;/JXn
if (l == r) lmL$0{Yr
return; ?A*!rW:l;
if ((mid - l) >= THRESHOLD) jiLJiYMg
mergeSort(data, temp, l, mid); t*)mX2R,
else HiH<'m"\.
insertSort(data, l, mid - l + 1); U/|JAg#
if ((r - mid) > THRESHOLD) `<M>"~W
mergeSort(data, temp, mid + 1, r); `+>K)5hrR
else MtN!Xx
insertSort(data, mid + 1, r - mid); t4/ye>P &
lI.oyR'
for (i = l; i <= mid; i++) { K:~tZ
temp = data; 1+XM1(|c`
} yO!M$aOn/
for (j = 1; j <= r - mid; j++) { -)}Z $;1a
temp[r - j + 1] = data[j + mid]; SPt/$uYJ
} dt+r P%
int a = temp[l]; %9Z0\ a)[
int b = temp[r]; G'PZ=+!XO/
for (i = l, j = r, k = l; k <= r; k++) { 3JBXGT0gJ
if (a < b) { @7C.0>W_A
data[k] = temp[i++]; g=@d!]Z~[
a = temp; @|Yn~PwKs
} else { QHf&Z*Xtl
data[k] = temp[j--]; BK6 X)1R
b = temp[j]; ~QxW^DGa7]
} ]W`?0VwF
} *KY:U&*
} WQ%O/
0gaHYqkA>}
/** .SER,],P
* @param data "`4ky]
* @param l s8>y&b.
* @param i ,p#B5Dif/
*/ dM= &?g
private void insertSort(int[] data, int start, int len) { f(~N+2}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8(L2w|+B<
} >Bf3X&uS
} LSJ.pBl\X
} c$7~EP
} Z_m<x!
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堆排序： s_VcC_A
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package org.rut.util.algorithm.support; TEd5&Z
BOG.[?yx
import org.rut.util.algorithm.SortUtil; ~i>DF`w$
8{2
/** $m2#oI'D
* @author treeroot >WDHRC
* @since 2006-2-2 Q'Osw"
* @version 1.0 7)r]h?
*/ dVEs^ZtI
public class HeapSort implements SortUtil.Sort{ 89(qU
6` TwP\!$/
/* (non-Javadoc) /[FDiJH2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *kFd#b+xB
*/ J~]@#=,v
public void sort(int[] data) { 8$\j| mN
MaxHeap h=new MaxHeap(); ZxwrlaA
h.init(data); A%W]XEa<
for(int i=0;i h.remove(); _Ik?WA_;
System.arraycopy(h.queue,1,data,0,data.length); m]>zdP+
} eb\SpdM6
e,e(t7c?d
private static class MaxHeap{ $5JeN{B
B=a+cT
void init(int[] data){ nZ(]WPIN"
this.queue=new int[data.length+1]; {k_\1t(/
for(int i=0;i queue[++size]=data; VRQ`-#
fixUp(size); ;kk[x8$
} b},2A'X
} JfN '11,$
$lf/Mg_H
private int size=0; M0fN[!*z
&<98nT
private int[] queue; \+R%KA/F
\(i'iC
public int get() { 0NU%z.(%s
return queue[1]; l&+O*=#Hh
} F(ydqgH~a
qhxMO[f
public void remove() { *gwlW/%Fz
SortUtil.swap(queue,1,size--); 6~%><C
fixDown(1); H_RfIX)X
} %(W&(eN
file://fixdown MRt"#CO
private void fixDown(int k) { +fXwbZ?p
int j; B<SE|~\2
while ((j = k << 1) <= size) { o(SPT?ao~
if (j < size %26amp;%26amp; queue[j] j++; x!_5/
if (queue[k]>queue[j]) file://不用交换 0Gs\x
break; i;1pw_K
SortUtil.swap(queue,j,k); 9Y.(xp &vw
k = j; hE {";/}J
} u @Ze@N%
} W9%v#;2
private void fixUp(int k) { ev;&n@k_I
while (k > 1) { "++\6H<
int j = k >> 1; w&L~+Z<
if (queue[j]>queue[k]) Ih:Q}V#6
break; kku<0<(N
SortUtil.swap(queue,j,k); <4Gy~?
k = j; lwf4ke
} vWoppt
} Q[#}Oh6$
`Jc/ o=]
} lZ-U/$od
lk 1\|Q I
} hEB5=~A_
1GK.:s6.f
SortUtil： _ACN
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package org.rut.util.algorithm; a|z-EKV
!Sn|!:N4
import org.rut.util.algorithm.support.BubbleSort; u$R5Q{H_
import org.rut.util.algorithm.support.HeapSort; E_=F'sP?
import org.rut.util.algorithm.support.ImprovedMergeSort; T>asH
import org.rut.util.algorithm.support.ImprovedQuickSort; J1}\H$*X
import org.rut.util.algorithm.support.InsertSort; %FYhq:j
import org.rut.util.algorithm.support.MergeSort; 7_2D4CI
import org.rut.util.algorithm.support.QuickSort; rByth,|
import org.rut.util.algorithm.support.SelectionSort; T]wI)
import org.rut.util.algorithm.support.ShellSort; Ge`7`D>L
K2Abu?
/** q2E{o)9
* @author treeroot aPelt`
* @since 2006-2-2 ] x)>q
* @version 1.0 SvSO?H!-
*/ #S?^?3d
public class SortUtil { "BSY1?k{
public final static int INSERT = 1; -E|"?
public final static int BUBBLE = 2; B`-uZ9k
public final static int SELECTION = 3; u"qu!EY2
public final static int SHELL = 4; g,\kLTg
public final static int QUICK = 5; >;4q
public final static int IMPROVED_QUICK = 6; &'/"=lK
public final static int MERGE = 7; zU!{_Ao9
public final static int IMPROVED_MERGE = 8; /=;,lC
public final static int HEAP = 9; +=J$:/&U
s@{82}f~
public static void sort(int[] data) { ysOf=~1
sort(data, IMPROVED_QUICK); ?sQg{1"Zr
} gg#9I(pX
private static String[] name={ i[KXkjr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t}R!i-D|HB
}; W]eILCo
#[M^Q h
private static Sort[] impl=new Sort[]{ _5 SvZ;4
new InsertSort(), N%f"W&ci
new BubbleSort(), }SWfP5D@
new SelectionSort(), :(XyiF<Ud
new ShellSort(), 7Y@]o=DIc
new QuickSort(), R_G2C@y*
new ImprovedQuickSort(), enPtW
new MergeSort(), 'df@4}9
new ImprovedMergeSort(), 4C?{p%3c
new HeapSort() Xd:{.AXW
}; ]@9W19=P!P
OF<:BaRs/
public static String toString(int algorithm){ AT I=&O`
return name[algorithm-1]; q}Po)IUT`5
} kI`HD
#"6l+}
public static void sort(int[] data, int algorithm) { 4-[U[JJc
impl[algorithm-1].sort(data); Z]Xa:[
} s;P _LaIp)
?M4ig_
public static interface Sort { sRT5i9TQ
public void sort(int[] data); *1v3x:pQ'
} kq=Htbv7
mH;t)dT
public static void swap(int[] data, int i, int j) { }2LG9B%
int temp = data; vULDKJNHX
data = data[j]; ]u|FcwWc3
data[j] = temp; <P1nfH
} pqs!kSJV
} ;PMPXN'z6