[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; ~93+Oxg
} 6Ou[t6
int i1=l; M_\)<a(8
int i2=mid+1; {-s7_\|p(
for(int cur=l;cur<=r;cur++){ MG$Df$R
if(i1==mid+1) #:nds,
data[cur]=temp[i2++]; !^w}Sp
else if(i2>r) }vQY+O
data[cur]=temp[i1++]; R<ZyP~
else if(temp[i1] data[cur]=temp[i1++]; HuajdC~
else L%4Do*V&
data[cur]=temp[i2++]; pg4jPuCM
} G88g@Exk
} o&rNM5:
:4S~}}N
} IaRq6=[
],Y+|uX->
改进后的归并排序: (%|L23
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package org.rut.util.algorithm.support; *AI?md
%;YERO!
import org.rut.util.algorithm.SortUtil; {i:Ayhq~&
Rm=[Sj84
/** SWMi+)
* @author treeroot ,F0bkNBG
* @since 2006-2-2 wfBf&Z0{
* @version 1.0 r`d.Wy Zj
*/ X:gE mcXc
public class ImprovedMergeSort implements SortUtil.Sort { #Pq.^ ^
"?Xb$V7
private static final int THRESHOLD = 10; 4(}V$#^+
mX QVL.P\
/* #6qLu
* (non-Javadoc) MNsgD3
* #wZBWTj.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e(sV4Z~
*/ xouy|Nn'
public void sort(int[] data) { bY7~b/
int[] temp=new int[data.length]; **lT 'D
mergeSort(data,temp,0,data.length-1); uOnyU+fZV
} >&2n\HR\
=[V
private void mergeSort(int[] data, int[] temp, int l, int r) { 7Ys\=W1
int i, j, k; <bxp/#6D
int mid = (l + r) / 2; tD !$!\`O
if (l == r) 5_ioJ
return; @mrGG F
if ((mid - l) >= THRESHOLD) E7UYJ)6]
mergeSort(data, temp, l, mid); Na2n4x!
else ?g #4&z.
insertSort(data, l, mid - l + 1); Sej\Gt
if ((r - mid) > THRESHOLD) &nEQ`3~F
mergeSort(data, temp, mid + 1, r); yu]nK-Y7S
else 4mJ[Wr\y
insertSort(data, mid + 1, r - mid); W-ll2b
7BDoF!kCx
for (i = l; i <= mid; i++) { #9)D.d|5
temp = data; p-;I"uKv
} .ITR3]$
for (j = 1; j <= r - mid; j++) { gXI8$W>
temp[r - j + 1] = data[j + mid]; dY%>C75O
} fA>FU/r
int a = temp[l]; wX*F'r"z
int b = temp[r]; +HOHu*D
for (i = l, j = r, k = l; k <= r; k++) { dF/HKBJ
if (a < b) { q-)Ynp4'
data[k] = temp[i++]; />\6_kT
a = temp; P1f@?R&t+
} else { %;{Ro)03
data[k] = temp[j--]; G*lkVQ6?
b = temp[j]; M8wEy_XB1
} T=n)ea A
} RRH[$jk
} Pwh0Se5Z
-N]%)Hy
/** 2XN];,{
* @param data pl.K*9+
* @param l ?pJUbZ#J
* @param i \P` mV9P
*/ z1u1%FwOfM
private void insertSort(int[] data, int start, int len) { 4Cdl^4(LT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )HN,Az"
} L)Iv]u
} *3>$f.QU
} 2l9RU}
} aJi0!6oy
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堆排序： ZdP2}w
Fl'+ C
package org.rut.util.algorithm.support; ,:e##g~k
f4TNy^-
import org.rut.util.algorithm.SortUtil; Kq*D_Rh2
psHW(Z8G
/** _Bh ^<D-
* @author treeroot v)a$;P%
* @since 2006-2-2 ))qOsphN
* @version 1.0 `zJTVi4
*/ 9. 7XRxR^
public class HeapSort implements SortUtil.Sort{ ^l(Kj3gM
-`o22G3w
/* (non-Javadoc) ma<+!*|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xt!%W
*/ DgQw9`WA
public void sort(int[] data) { )Bq~1M 2
MaxHeap h=new MaxHeap(); 2sOV3~bB
h.init(data); :i4>&4j
for(int i=0;i h.remove(); Gg3cY{7
System.arraycopy(h.queue,1,data,0,data.length); ,`3kDqS_4
} k>8,/ AZd
1qw*mV;W)_
private static class MaxHeap{ -|l^- Qf!
cG"+n@\
void init(int[] data){ A{:PpYs
this.queue=new int[data.length+1]; 8p?Fql}F[
for(int i=0;i queue[++size]=data; YuZxKuGy
fixUp(size); @GB~rfB[
} XCGJ~
} [a&|c%h
Lwg@*:`d
private int size=0; 0koC;(<n
"Yo.]PU
private int[] queue; pL{h1^O}
J1?)z+t9~
public int get() { PN!NB.
return queue[1]; lJfn3
} ="$9 <wt
2\Vzfca
public void remove() { jORU+g
SortUtil.swap(queue,1,size--); Z>)(yi9+
fixDown(1); `|1#Vuk
} nQ0g,'o
file://fixdown eRK kHd-
private void fixDown(int k) { [,Io!O
int j; MVGznf?
while ((j = k << 1) <= size) { ?(&)p~o
if (j < size %26amp;%26amp; queue[j] j++; /5ngPHy&
if (queue[k]>queue[j]) file://不用交换 36<PI'l#~
break; C>d_a;pX
SortUtil.swap(queue,j,k); z8SrZ#mg
k = j; iI27N'g
} liW0v!jBo
} qeK_w '
private void fixUp(int k) { V Q6&7@ c
while (k > 1) { *LTFDC
int j = k >> 1; &uh|!lD
if (queue[j]>queue[k]) ;E8.,#/a
break; =AhXEu^
SortUtil.swap(queue,j,k); 6n{`t/
k = j; ~mqiXr8
} `g2DN#q[0
} 6]=R#d 7U
,qS-T'[v,(
} q1Ja*=r
?h;Zdv>`xz
} ~bp^Q| wM
jpl"KN?X
SortUtil： H1]An'qz,
q;dg,Om
package org.rut.util.algorithm; wt;7+
*CHLs^)
import org.rut.util.algorithm.support.BubbleSort; nQ*9|v4
import org.rut.util.algorithm.support.HeapSort; E,]G Ek
import org.rut.util.algorithm.support.ImprovedMergeSort; 9'tElpDJ6#
import org.rut.util.algorithm.support.ImprovedQuickSort; o1j_5c PS
import org.rut.util.algorithm.support.InsertSort; CzF#feTA
import org.rut.util.algorithm.support.MergeSort; Tl.dr
import org.rut.util.algorithm.support.QuickSort; _H:mBk,,
import org.rut.util.algorithm.support.SelectionSort; S}q6CG7 u
import org.rut.util.algorithm.support.ShellSort; ^Z:oCTOP
W0]W[b,:u$
/** Gz]p2KBg
* @author treeroot `u%`Nj
* @since 2006-2-2 c~B[<.Qj
* @version 1.0 <1HbjRw
*/ ""GeO%J8
public class SortUtil { 9o|=n'o
public final static int INSERT = 1; 9sQ4 $
public final static int BUBBLE = 2; kKU,|>3h
public final static int SELECTION = 3; oUMY?[Wp
public final static int SHELL = 4; O@@=ZyYwc
public final static int QUICK = 5; GXV<fc"1
public final static int IMPROVED_QUICK = 6; WD=#. $z$
public final static int MERGE = 7; aKkG[qN
public final static int IMPROVED_MERGE = 8; wI!>IV(5
public final static int HEAP = 9; 01n5]^.p
.w/_Om4T*b
public static void sort(int[] data) { K:!|xr(1d
sort(data, IMPROVED_QUICK); `'Fz:i
} A4lh`n5%
private static String[] name={ S]kY'(V(*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J2\%rb,
}; [FHSFr E,5
Q+ r4
private static Sort[] impl=new Sort[]{ 1(z&0Y;
new InsertSort(), t(-`==.R
new BubbleSort(), _lrCf
new SelectionSort(), kW"6Gc&HUN
new ShellSort(), :Ogt{t
new QuickSort(), #&JhA2]q
new ImprovedQuickSort(), ).[Mnt/Ft
new MergeSort(), ~J}{'l1{yf
new ImprovedMergeSort(), eyq8wQT
new HeapSort() Q`nsL)J
}; 1+1Z]!nG#!
_~?N3G
public static String toString(int algorithm){ C NDf&dzX8
return name[algorithm-1]; [89qg+z
} Y`5(F>/RQG
h|^RM*x
public static void sort(int[] data, int algorithm) { Zi&qa+F
impl[algorithm-1].sort(data); Nf.6:=
} 'l+).},
cNi)[2o7
public static interface Sort { M_wqb'=
public void sort(int[] data); {H FF|Dx
} O?<R.W<QI
oxN~(H)/ #
public static void swap(int[] data, int i, int j) { ['p%$4i$
int temp = data; "PM!03rb
data = data[j]; !;";L5()
data[j] = temp; ;9>(yJI+
} M_-LI4>
} vs3px1Xe#