[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`jcC-;iv
} fJ\sguZ
int i1=l; ^_t%kmL`
int i2=mid+1; )VCzn~uf
for(int cur=l;cur<=r;cur++){ P1b'%
if(i1==mid+1) pL1Q7&&c0
data[cur]=temp[i2++]; 6iEhsL&K
else if(i2>r) zf4Ec-)
data[cur]=temp[i1++]; fPi3sb`}
else if(temp[i1] data[cur]=temp[i1++]; \T]EZ'+O
else f\+fo
data[cur]=temp[i2++]; Iz6y{E
} L@75-T
} G$'jEa<:u
x\&`>>uA
} B/5=]R
g-`~eG28D5
改进后的归并排序: Q9d`zR]
MS(JR
package org.rut.util.algorithm.support; yKXff1^M
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import org.rut.util.algorithm.SortUtil; %p^.\ch9
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/** Eca\fkj
* @author treeroot )&era` e[
* @since 2006-2-2 J$4wL F3
* @version 1.0 H/M Au7
*/ {7!UQrm<
public class ImprovedMergeSort implements SortUtil.Sort { )eUW5 tS
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private static final int THRESHOLD = 10; p~ C.IG
VL[R(a6c <
/* Y+4o B
* (non-Javadoc) 8ul&x~2;X
* 8<mjh0F-,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sS&Z ,A
*/ e*(b
public void sort(int[] data) { \;VhYvEH
int[] temp=new int[data.length]; ve ~05mg
mergeSort(data,temp,0,data.length-1); M3p
} hS[yNwD
,f}UGd[a
private void mergeSort(int[] data, int[] temp, int l, int r) { ug{R 3SS
int i, j, k; 7NC=*A~
int mid = (l + r) / 2; < B_Vc:Q
if (l == r) K =.%$A
return; &U+ _ -Ph
if ((mid - l) >= THRESHOLD) wU#F_De)R:
mergeSort(data, temp, l, mid); k>dsw:
else ^gVT$A
insertSort(data, l, mid - l + 1); 8Qh#)hiW!
if ((r - mid) > THRESHOLD) $Vc~/>
mergeSort(data, temp, mid + 1, r); ut>4U'.H
else v7%X@j]ji
insertSort(data, mid + 1, r - mid); t9&cE:n
`cx]e
for (i = l; i <= mid; i++) { $?,a[79
temp = data; Tirux ;
} Xh J,"=E+
for (j = 1; j <= r - mid; j++) { 5TBp'7 /s~
temp[r - j + 1] = data[j + mid]; K"<PGOF
} <Sz52Suh>
int a = temp[l]; h' !imQ
int b = temp[r]; \%sVHt`c
for (i = l, j = r, k = l; k <= r; k++) { ,>t69 Ad
if (a < b) { \#68;)+=
data[k] = temp[i++]; Ku&!?m@C
a = temp; %/>xO3"T
} else { X2tk[Kr
data[k] = temp[j--]; |uW:r17
b = temp[j]; !*2%"H*
} 3E f1bhi
} SXao|{?O
} p3/*fH98
DzQ1%!
/** Cf B.ZT
* @param data d:G]1k;z
* @param l I@Xn3oN
* @param i O]f/r,4@
*/ \rykBxs
private void insertSort(int[] data, int start, int len) { {JV@"t-X3"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "EU{8b
} G/%iu;7ZCb
} .I}:m%zv
} lTU$0CG
} b$k&dT\o
B\g]({E
堆排序： y~IuPc
yL;M"L
package org.rut.util.algorithm.support; c9R5w.t:
UpXz&k
import org.rut.util.algorithm.SortUtil; g*w<*
K78rg/`
/** 86f2'o+
* @author treeroot &C>/L;
* @since 2006-2-2 6<0n *&
* @version 1.0 [i0Hm)Bd3
*/ TpA\9N#$
public class HeapSort implements SortUtil.Sort{ 8A{_GH{:
qyHZ M}/
/* (non-Javadoc) nUq<TJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2xw6 5z
*/ <8UYhGK
public void sort(int[] data) { iYnEwAoN;
MaxHeap h=new MaxHeap(); ;,&8QcSVY
h.init(data); 10#oG{9
for(int i=0;i h.remove(); VL' fP2
System.arraycopy(h.queue,1,data,0,data.length); R:p62c;Tv0
} '03->7V
%p&k5:4<"#
private static class MaxHeap{ 8G>>i)Sbg
vpPl$ga5bY
void init(int[] data){ 7u\*_mrv
this.queue=new int[data.length+1]; ]d[ge6
for(int i=0;i queue[++size]=data; KRJLxNr
fixUp(size); [OOS`N4<
} \:> Wpqw
} =66Nw(E.
E&Qi@Ty
private int size=0; pj?XLiM54%
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private int[] queue; +h2eqNr
Nr2C@FU:0
public int get() { RFh"&0[
return queue[1]; rQTr8DYH
} Ax oD8|
M5T9JWbN
public void remove() { xoB},Xl$D
SortUtil.swap(queue,1,size--); k%[3Q>5iM
fixDown(1); ;M]C1!D9#
} yGg,$WM
file://fixdown E&yD8=vw
private void fixDown(int k) { crO@?m1
int j; :a:[.
while ((j = k << 1) <= size) { iVB^,KQ@
if (j < size %26amp;%26amp; queue[j] j++; V8=Y@T,
if (queue[k]>queue[j]) file://不用交换 C8a*Q"
break; D71;&G]0
SortUtil.swap(queue,j,k); (h']a!
k = j; ,fEO> i
} Z -%(~
} 61U<5:#l
private void fixUp(int k) { Cw5%\K$=
while (k > 1) { o`khz{SU:
int j = k >> 1; hVjNZ
if (queue[j]>queue[k]) y80ykGPT\&
break; Y+/JsOD
SortUtil.swap(queue,j,k); D .vw8H3
k = j; E2GGEKrW
} iAY!oZR(WT
} <"o"z2
hO{cvHy`
} .s/fhk,
*9ywXm&?
} Ba\6?K
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SortUtil： >-E<n8
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package org.rut.util.algorithm; ~.PP30'
GFSt<k)
import org.rut.util.algorithm.support.BubbleSort; UDf9FnG}L
import org.rut.util.algorithm.support.HeapSort; c= UU"
import org.rut.util.algorithm.support.ImprovedMergeSort; bg|!'1bD`5
import org.rut.util.algorithm.support.ImprovedQuickSort; w",? Bef
import org.rut.util.algorithm.support.InsertSort; G ;?qWB,
import org.rut.util.algorithm.support.MergeSort; Lw1T 4n
import org.rut.util.algorithm.support.QuickSort; 4Z[V uQng
import org.rut.util.algorithm.support.SelectionSort; =Nz0.:
import org.rut.util.algorithm.support.ShellSort; !gwjN_ZJ^
3E}EBJLsZ
/** Dj\e@?Y
* @author treeroot n{*e 9Aw
* @since 2006-2-2 nZR!*$}A
* @version 1.0 V+?]S
*/ GC8}X;((Y
public class SortUtil { - ~O'vLG
public final static int INSERT = 1; Q5S,{ ZeT
public final static int BUBBLE = 2; &PcyKpyd
public final static int SELECTION = 3; ashcvn~z
public final static int SHELL = 4; QD{:vG g
public final static int QUICK = 5; `h;k2Se5
public final static int IMPROVED_QUICK = 6; lC97_T
public final static int MERGE = 7; ]43[6Im
public final static int IMPROVED_MERGE = 8; dsK&U\ej}
public final static int HEAP = 9; Z:2I/
33:DH}
public static void sort(int[] data) { 8l/[(] &
sort(data, IMPROVED_QUICK); 1|,Pq9
} [%HIbw J
private static String[] name={ ,]R8(bD)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3E} An%
}; 8:ggECD
j-]&'-h}#
private static Sort[] impl=new Sort[]{ QzGV.Mt2
new InsertSort(), JM0I(%Z%
new BubbleSort(), v}Wmd4Y'
new SelectionSort(), 7J>Gd
new ShellSort(), (7lBID4
new QuickSort(), 4dH}g~[P9
new ImprovedQuickSort(), 8OWmzY_=
new MergeSort(), $awi>#[
new ImprovedMergeSort(), zIQzmvf
new HeapSort() _BnTv$.P
}; E]^5I3=O
?y},,
public static String toString(int algorithm){ (k-YI{D3
return name[algorithm-1]; jm>3bd
} Hr;h4J
HN5W@5m: .
public static void sort(int[] data, int algorithm) { mkvvNm3
impl[algorithm-1].sort(data); hJ%1
} h -_&MD/J
&!7+Yb(1
public static interface Sort { <*'cf2Q$Av
public void sort(int[] data); @%tXFizh
} q5&Ci`
c yQ(fIYl
public static void swap(int[] data, int i, int j) { !J>A,D"-
int temp = data; Y{Ap80'\6
data = data[j]; QHf$f@bjI
data[j] = temp; g+q@i{Yn
} E|Bd>G
} $]d*0^J 6