[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; IYO,/ kbf
} V[mQ;:=
int i1=l; :kVV.a#g
int i2=mid+1; LC7LO
for(int cur=l;cur<=r;cur++){ Vj]kJ,j\y
if(i1==mid+1) )QE_+H}p
data[cur]=temp[i2++]; 10J*S[n1
else if(i2>r) (J4utw Z
data[cur]=temp[i1++]; %:,=J
else if(temp[i1] data[cur]=temp[i1++]; gQEV;hCO
else Ueeay^zN
data[cur]=temp[i2++]; x-pMT3m\D#
} |gVO Iq
} ^%d{i'9?
XZInu5(
} 2T5xSpC
+i^s\c!3;
改进后的归并排序: f3N:MH-c
8Vn6* Xn
package org.rut.util.algorithm.support; q KM]wu0Et
@5y(>>C}8%
import org.rut.util.algorithm.SortUtil; l0&8vhw8k
8joQPHkI\
/** )ziQ=k6d6
* @author treeroot )^\='(s
* @since 2006-2-2 !{Y#<tG]
* @version 1.0 6.|~~/
*/ LU{Z
public class ImprovedMergeSort implements SortUtil.Sort { ]~^/w}(K
8UIL_nPO
private static final int THRESHOLD = 10; \uk#pL
9^^#I~-
/* W~%~^2g ;k
* (non-Javadoc) Fsf22
* ;*2e;m~)?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gQuw|u
*/ kYB <FwwB
public void sort(int[] data) { vb- .^l
int[] temp=new int[data.length]; ?I'-C?(t@1
mergeSort(data,temp,0,data.length-1); '-IT@}
} r?!xL\C\
J31M:<
private void mergeSort(int[] data, int[] temp, int l, int r) { .( h$@|Y
int i, j, k; {^W,e ^:
int mid = (l + r) / 2; JP4Moq~r
if (l == r) XijLS7Aw|
return; V]]qu:Mh8
if ((mid - l) >= THRESHOLD) U!/nD~A
mergeSort(data, temp, l, mid); b8.%?_?
else YfwJBzD
insertSort(data, l, mid - l + 1); 0s|LK
if ((r - mid) > THRESHOLD) -;\+uV
mergeSort(data, temp, mid + 1, r); QYgN39gp
else mi<D bnou
insertSort(data, mid + 1, r - mid); \+3Wd$I
-o_TC
for (i = l; i <= mid; i++) { tb0E?&M
temp = data; CFm1c1%Hg
} Yp]G)}'R
for (j = 1; j <= r - mid; j++) { Pp_3 nyQ
temp[r - j + 1] = data[j + mid]; nb_^3K]r
} 2<G1'7)
int a = temp[l]; q|X4[E|{Q
int b = temp[r]; qffSq](D.
for (i = l, j = r, k = l; k <= r; k++) { f_!`~`04
if (a < b) { L~{Vt~H9"
data[k] = temp[i++]; &H&P)Px*_
a = temp; k|3(dXLG
} else { o#P3lz
data[k] = temp[j--]; {p|%hhTK%
b = temp[j]; mRH]'dlD7
} WKl'
} kqW<e[
} 6b70w @P!
huJq#5?
/** Sz|CreFK16
* @param data +.]}f}Y
* @param l G}#/`]o!K
* @param i +MZO%4
*/ RVnyl`s
private void insertSort(int[] data, int start, int len) { h+3Z.WKhwP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `4.sy +2
} Ig3(|{R
} loUwRz
} ` G=L07
} )H9*NB8%
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堆排序： bmVgTm&
2nU NI U
package org.rut.util.algorithm.support; As~p1%nok
X$ B]P7G7
import org.rut.util.algorithm.SortUtil; k!/_/^{
1Bk*G>CX9(
/** @zynqh
* @author treeroot R96o8#7Uv
* @since 2006-2-2 IR dz(~CP
* @version 1.0 z8(R.TB
*/ bsi q9$F
public class HeapSort implements SortUtil.Sort{ @'r`(o3z!Z
Ui|a}`c
/* (non-Javadoc) Z;y}gv/{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) As'M39*V
*/ ^T&u!{82j
public void sort(int[] data) { Sq|1f?_gU
MaxHeap h=new MaxHeap(); =x0"6gTz>
h.init(data); !@Sf>DM"
for(int i=0;i h.remove(); r\n h.}s
System.arraycopy(h.queue,1,data,0,data.length); VuMDV6^Z
} sRyw\v-=P
sIRrEea
private static class MaxHeap{ $',GkK{NX
Xc2B2c
void init(int[] data){ !^l4EL5#
this.queue=new int[data.length+1]; g<iwxF
for(int i=0;i queue[++size]=data; nn)`eR&
fixUp(size); #1't"R+3M
} cCh5Jl@Z
} an=+6lIl
7#9'2dI
private int size=0; 380->
# 5f|1O
private int[] queue; sL7`=a.&T
BY4 R@)
public int get() { 5'kTe=
return queue[1]; &&9c&xgzE
} !UBDx$]^
c,+(FQ9
public void remove() { F%.9fUo
SortUtil.swap(queue,1,size--); v!#`W
fixDown(1); &Ev]x2YC
} kh?#={]Z
file://fixdown ui56<gI-
private void fixDown(int k) { PF'5z#] NP
int j; 1&% d
while ((j = k << 1) <= size) { ^KZAYB9C
if (j < size %26amp;%26amp; queue[j] j++; *)NR$9lGv
if (queue[k]>queue[j]) file://不用交换 B)DC,+@$
break; Jl>at
SortUtil.swap(queue,j,k); D){"fw+b
k = j; 2[LX\
} gl9pgY1ni
} {FJX
private void fixUp(int k) { M8?#%x6;N
while (k > 1) { urrO1
int j = k >> 1; u_4:#~b
if (queue[j]>queue[k]) ?b@q5Y
break; _PyW=Tj
SortUtil.swap(queue,j,k); 5"}y\
k = j; %%as>}.
} ?K4.L?D#J
} V|3yZ8lE
:^H9W^2
} Zc4(tf9
8L7Y A)u
} z<oE!1St
TRk ?8
SortUtil： co<2e#p;
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package org.rut.util.algorithm; 1=/doo{^
#Z|%0r_~
import org.rut.util.algorithm.support.BubbleSort; !Bk[p/\
import org.rut.util.algorithm.support.HeapSort; V`g\ja*Y
import org.rut.util.algorithm.support.ImprovedMergeSort; =M1a0i|d
import org.rut.util.algorithm.support.ImprovedQuickSort; zj9bSDVL(
import org.rut.util.algorithm.support.InsertSort; I3G*+6V
import org.rut.util.algorithm.support.MergeSort; ~jp!"f
import org.rut.util.algorithm.support.QuickSort; +H[}T ]
import org.rut.util.algorithm.support.SelectionSort; s`Yu"s 8}4
import org.rut.util.algorithm.support.ShellSort; 0+K`pS'
v7o?GQ75
/** I 9{40_
* @author treeroot A;fB6
* @since 2006-2-2 -YzQ2#K
* @version 1.0 #gX%X~w$F
*/ 3R<ME c
public class SortUtil { IW1GhZ41'
public final static int INSERT = 1; 1A%N0#_(Md
public final static int BUBBLE = 2; tDC0-N&6S~
public final static int SELECTION = 3; Hi; K"H]x1
public final static int SHELL = 4; Q? <-`7
public final static int QUICK = 5; ch0oFc$
public final static int IMPROVED_QUICK = 6; :(bdI]
public final static int MERGE = 7; 3{NaZIk
public final static int IMPROVED_MERGE = 8; DA+A >5/
public final static int HEAP = 9; 'A@qg^e:`
[Krm .)
public static void sort(int[] data) { P9 {}&z%:
sort(data, IMPROVED_QUICK); Vqa5RVnI
} U{T[*s
private static String[] name={ >W`S(a Mn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6CcB-@n4
}; '[>\N4WD
0kU3my]
private static Sort[] impl=new Sort[]{ o,S!RG&
new InsertSort(), !dfS|BA]
new BubbleSort(), !Qv5"_
new SelectionSort(), J6)efX)j-p
new ShellSort(), C6K|:IK{
new QuickSort(), b4Ricm
new ImprovedQuickSort(), 6WA|'|}=
new MergeSort(), 1.Haf
new ImprovedMergeSort(), t{/:(Nu
new HeapSort() p!HPp Ef+#
}; "XGD:>Q.
vnz[w=U
public static String toString(int algorithm){ r+t ,J|V
return name[algorithm-1]; |rr$U
} snXB`UC
5z1\#" B[
public static void sort(int[] data, int algorithm) { A#v|@sul
impl[algorithm-1].sort(data); q%OcLZ<,
} 4t&gW
>EBZ$X
public static interface Sort { 0n4g$JK7
public void sort(int[] data); x`]Ofr'
} 8O~0RYk
lo cW_/
public static void swap(int[] data, int i, int j) { 0zg2g!lh
int temp = data; y]yine
data = data[j]; jMN)?6$=
data[j] = temp; u|(Ux~O
} 4^0d)+Ff
} w+t#Yb\7