[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; _"yA1D0d_
} 1H/I-
int i1=l; f6`GU$H
int i2=mid+1; U{hu7
for(int cur=l;cur<=r;cur++){ ZqVbNIY
if(i1==mid+1) W_Y8)KxG:L
data[cur]=temp[i2++]; BrwC9:
else if(i2>r) RK|*yt"f"
data[cur]=temp[i1++]; p.=9[`
else if(temp[i1] data[cur]=temp[i1++]; o1$u;}^|
else {.{Wl,|7
data[cur]=temp[i2++]; }a6t<m`V
} V1V0T ,
} "yaxHd
f=R+]XPzz
} &o;0%QgF
`9J9[!+!`
改进后的归并排序: K -rR)-rI
6- i.*!I 8
package org.rut.util.algorithm.support; e;6KxvX~
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import org.rut.util.algorithm.SortUtil; fj5g\m
J @"#
/** #lP8/-s^
* @author treeroot =79R;|5
* @since 2006-2-2 e}e8WR=B
* @version 1.0 y3dk4s77
*/ *n? 1C"l
public class ImprovedMergeSort implements SortUtil.Sort { 3N+lWuE}K
NFs5XpZ~
private static final int THRESHOLD = 10; D%YgS$p[M$
U4pIRa)S
/* RU:Rt'
* (non-Javadoc) ^QRg9s,T<
* { :tO RF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ump~)?_B
*/ "n!yK
public void sort(int[] data) { G:=hg6'
int[] temp=new int[data.length]; `@h|+`h
mergeSort(data,temp,0,data.length-1); 7w/IHML
} &[.`xZ(|
7z{wYCw
private void mergeSort(int[] data, int[] temp, int l, int r) { =^nb+}Nz(
int i, j, k; d,"LZ>hNY*
int mid = (l + r) / 2; V0\[|E;F
if (l == r) zN4OrG0
return; 1PkCWRpR
if ((mid - l) >= THRESHOLD) +T+@g8S
mergeSort(data, temp, l, mid); ;Ba%aaHl
else N6Ud(8*
insertSort(data, l, mid - l + 1); afEa@et'
if ((r - mid) > THRESHOLD) ^/2I)y]W0
mergeSort(data, temp, mid + 1, r); 9oWU]A\k>
else Dm>"c;2
insertSort(data, mid + 1, r - mid); Tu#< {'1$
RdTM5ANT
for (i = l; i <= mid; i++) { y/lF1{}5
temp = data; I{`70
} Ux[<g%F"
for (j = 1; j <= r - mid; j++) { V#t_gS
temp[r - j + 1] = data[j + mid]; ~U9K<_U
} UNdD2Fd9
int a = temp[l]; d8j1L/e
int b = temp[r]; 0lfK} a
for (i = l, j = r, k = l; k <= r; k++) { :d36oiHKu
if (a < b) { yB*,)x0 @
data[k] = temp[i++]; 1o_kY"D<
a = temp; z^gJy,T
} else { kN1MPd4Yh
data[k] = temp[j--]; H",B[ YK
b = temp[j]; tli.g
} *z=_sD?1
} kI\m0];KnQ
} RU)35oEV|
g,ZA\R~
/** @ D+ftb/
* @param data R?2sbK4Cz
* @param l <qCa9@Ea
* @param i g*|j+<:7
*/ L[` l80
private void insertSort(int[] data, int start, int len) { KhCP9(A=Qo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]rmBM
} h~MV=7 lE
} jcH@*c=%e
} 8sG3<$Z^
} n\#YGL<n
\INH[X#>
堆排序： XC4Z,,ah"
6K $mW
package org.rut.util.algorithm.support; G7-BeA8
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import org.rut.util.algorithm.SortUtil; i%glQT
"cH RGJG#
/** fn#8=TIDf
* @author treeroot BG{f)2F\
* @since 2006-2-2 $6QIYF""
* @version 1.0 B*7kX&Uq
*/ eE;tiX/
public class HeapSort implements SortUtil.Sort{ _`$LdqgE
`sxfj)s
/* (non-Javadoc) ]-PzN'5\'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;`9f<d#\
*/ Otn,UoeeB
public void sort(int[] data) { *pl6 V|
MaxHeap h=new MaxHeap(); ;?6vKpj;
h.init(data); 5:Qz
for(int i=0;i h.remove(); `S&a.k
System.arraycopy(h.queue,1,data,0,data.length); qZoDeN-CC
} JFq wC=-
NOz3_k
private static class MaxHeap{ d{ (,Gy>I
yIw}n67
void init(int[] data){ l}{{7~C`
this.queue=new int[data.length+1]; [+#m THX
for(int i=0;i queue[++size]=data; 8$Q`wRt(%
fixUp(size); KuNLu31%
} xQ?>72grP
} f*ZU a
St=nf\P&F
private int size=0; [^>XRBSm
(su,=Z
private int[] queue; P{L=u74b{x
SNEhP5!
public int get() { V>$( N/1
return queue[1]; [f6uwp
} PN}+LOD<t
8(3(kZxS
public void remove() { 5Iu5N0cn
SortUtil.swap(queue,1,size--); @xG&K{j
fixDown(1); xh6(~'$
} (1/Sf&2i
file://fixdown n `j._G
private void fixDown(int k) { 9rB3h`AVF
int j; IQQv+af5
while ((j = k << 1) <= size) { D)*
if (j < size %26amp;%26amp; queue[j] j++; On C)f
if (queue[k]>queue[j]) file://不用交换 OY*y<>
break; r}U6LE?>
SortUtil.swap(queue,j,k); <,.$U\W
k = j; v|?@k^Ms
} g/?Vl2W
} egmUUuO
private void fixUp(int k) { OqGp|`
while (k > 1) { ~$!,-r
int j = k >> 1; !E7gIqo
if (queue[j]>queue[k]) E4#{&sRT
break; _K5<)( )
SortUtil.swap(queue,j,k); 6:1`lsP
k = j; ci,(]T+!
} qLR;:$]Q&8
} 1N5 E
cS&KD@.
} FlO?E3d
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} /08FV|tX)
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SortUtil： !&)X5oJ
I=`?4%
package org.rut.util.algorithm; (6%T~|a
VPCI5mS_
import org.rut.util.algorithm.support.BubbleSort; N$=YL @m8
import org.rut.util.algorithm.support.HeapSort; N=mvr&arP
import org.rut.util.algorithm.support.ImprovedMergeSort; 0'&C5v'
import org.rut.util.algorithm.support.ImprovedQuickSort; 'r'=%u$1C
import org.rut.util.algorithm.support.InsertSort; 2BY|Cp4R
import org.rut.util.algorithm.support.MergeSort; z/Lb1ND8
import org.rut.util.algorithm.support.QuickSort; \Z*:l(
import org.rut.util.algorithm.support.SelectionSort; _/[qBe
import org.rut.util.algorithm.support.ShellSort; 92-Xz6Bo9
mR}8}K]L
/** Aez2n(yac
* @author treeroot %Z;RY5
* @since 2006-2-2 ;NP-tA)
* @version 1.0 z$<=8ox8e
*/ l&& i`
public class SortUtil { 1$Up7=Dr=
public final static int INSERT = 1; {/[@uMS_6]
public final static int BUBBLE = 2; &Vj@){
public final static int SELECTION = 3; sbvP1|P8%
public final static int SHELL = 4; ueg%yvO
public final static int QUICK = 5; ff9m_P
public final static int IMPROVED_QUICK = 6; .+7n@Sc
public final static int MERGE = 7; )St0}?I~
public final static int IMPROVED_MERGE = 8; <?7CwW
public final static int HEAP = 9; ;5X6`GlS#5
SiNgV\('U
public static void sort(int[] data) { LM<*VhX
sort(data, IMPROVED_QUICK); kn#?+Q
} Fd8nR9A
private static String[] name={ f:j:L79}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c((3B
}; >A )Sl'
"t2T*'j{
private static Sort[] impl=new Sort[]{ ~HY)$Yp;
new InsertSort(), `=Mk6$%Cs
new BubbleSort(), HSud$(w
new SelectionSort(), &UDbH* !4=
new ShellSort(), pIIp61=$
new QuickSort(), R/u0,
new ImprovedQuickSort(), clDn=k<
new MergeSort(), d 6Y9D=O
new ImprovedMergeSort(), j'*.=cwsp
new HeapSort() kwi$%
}; _9oKW;7f7
<mX5VGY9^
public static String toString(int algorithm){ 7Kym|Zg
return name[algorithm-1]; hGFi|9/-u
} -cUW,>E
28JVW3&)
public static void sort(int[] data, int algorithm) { w !kk(QMV
impl[algorithm-1].sort(data); do`'K3a"
} ~vP_c(8f
Q3=X#FQ
public static interface Sort { Qfeu3AT
public void sort(int[] data); v~RxtTu
} zt2#K
S|d /?}C|e
public static void swap(int[] data, int i, int j) { 9X[378f+(
int temp = data; ||2%N/?
data = data[j]; wz+mFf
data[j] = temp; tzl,r"k3
} 6oKlr,.
} `-nSH)GBM