[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; EPd.atA
} r+#V{oE_
int i1=l; {}_Oo%IVGK
int i2=mid+1; Y`O}]*{>8R
for(int cur=l;cur<=r;cur++){ Y)j,(9
if(i1==mid+1) k}0
data[cur]=temp[i2++]; ={i&F
else if(i2>r) +$mskj0s
data[cur]=temp[i1++]; ]MA)='~
else if(temp[i1] data[cur]=temp[i1++]; bQN4ozSi
else by y1MgQd
data[cur]=temp[i2++]; O"-PNF,J
} _467~5JkU
} &\]f!'jV
\=G Xe.}4d
} zQ|x>3
U/&qV"Ih
改进后的归并排序: Boj{+rE0
owY_cDzrH
package org.rut.util.algorithm.support; cSs/XJZ
0!'M#'m
import org.rut.util.algorithm.SortUtil; 7/OOq=z
o(SJuZC/U
/** Z-p^3t'{
* @author treeroot &lfF!
* @since 2006-2-2 Pymh^i
* @version 1.0 k#r7&Y
*/ Y)5uK:)^
public class ImprovedMergeSort implements SortUtil.Sort { rnBeL _8C
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private static final int THRESHOLD = 10; /G{3p&9
{)[g
/* Umwg iw
* (non-Javadoc) vls> 6h
* [c!vsh]^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2u;fT{(
*/ YIk6:W{
public void sort(int[] data) { jeBj
int[] temp=new int[data.length]; @k #y-/~?
mergeSort(data,temp,0,data.length-1); CY).I`aJ
} r`g;k&"a
_C8LK.M#j
private void mergeSort(int[] data, int[] temp, int l, int r) { +bd{W]={
int i, j, k; {}C7VS1
int mid = (l + r) / 2; -Jrc'e4K
if (l == r) yrYaKh
return; ,v5>sL
if ((mid - l) >= THRESHOLD) &+{xR79+&
mergeSort(data, temp, l, mid); 0|Ft0y`+
else !9cPNIi
insertSort(data, l, mid - l + 1); +~{nU'
if ((r - mid) > THRESHOLD) n *0F
mergeSort(data, temp, mid + 1, r); o%>nu
else nMoF;AdKm
insertSort(data, mid + 1, r - mid); Oc+L^}elJ
4_:e+ ql
for (i = l; i <= mid; i++) { td$6:)
temp = data; Cv7RCjMw
} ~HI0<;r=eL
for (j = 1; j <= r - mid; j++) { 3K:Xxkk
temp[r - j + 1] = data[j + mid]; XBt0Ez
} 5h^qtK
int a = temp[l]; (9_e>2_
int b = temp[r]; $`{q =
for (i = l, j = r, k = l; k <= r; k++) { ]"vdC}
if (a < b) { ]Oh>ECA|D
data[k] = temp[i++]; CrX-?$
a = temp; ?iO^b.'I#
} else { 7IW7'klkvD
data[k] = temp[j--]; \mit&EUh}
b = temp[j]; A_ z:^9
} %a^!~qV
} P3FpU<OBwp
} ] r+I D
2xBGs9_Y
/** JJOs L!@
* @param data 2-2LmxLG
* @param l ^n5QKHD
* @param i vjWgR9 4/{
*/ / ^M3-5@Q
private void insertSort(int[] data, int start, int len) { XxQ2g&USk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .shI%'V
} Ds5&5&af
} ^o<Nz8
} 8(K~QvE~
} ]@]"bF!Dn
t$D[,$G9
堆排序： Z{)|w=
2YEn)A@8
package org.rut.util.algorithm.support; .kDCcnm
]V\g$@
import org.rut.util.algorithm.SortUtil; 52Ffle8
j*\MUR=
/** yG_.|%e
* @author treeroot ?&^l8gE
* @since 2006-2-2 IN*Z__l8j`
* @version 1.0 &1n0(qB
*/ l%w|f`B:
public class HeapSort implements SortUtil.Sort{ B|w}z1.
$jL.TraV7
/* (non-Javadoc) uty]-k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L)"w-,zy
*/ 2a}_|#*
public void sort(int[] data) { @WUCv7U
MaxHeap h=new MaxHeap(); Gwk@X/q
h.init(data); ~t$VzL1
for(int i=0;i h.remove(); JsdEA
System.arraycopy(h.queue,1,data,0,data.length); ../(gG9
} |'(IWU
h 'CLf]
private static class MaxHeap{ SK2pOZN
t/c^hTT
void init(int[] data){ #Z5~a9rO
this.queue=new int[data.length+1]; "lMWSCas
for(int i=0;i queue[++size]=data; #jR?C9&!(
fixUp(size); 9$t@Gmn
} wIPDeC4
} ,peFNpi
0(.C f.B~
private int size=0; of<OOh%3
DvKMb-*S
private int[] queue; S+ x[1#r
U_04QwhK7
public int get() { A]slssE+
return queue[1]; !"">'}E1
} 4^A'A.0
!b Km}1T
public void remove() { |1$X`|S
SortUtil.swap(queue,1,size--); BW1O1zIh\
fixDown(1); iE{SqX
} 3?<vnpN=5d
file://fixdown ,s<d"]<
private void fixDown(int k) { }\*|b@)]
int j; B!lw>rUMQ
while ((j = k << 1) <= size) { >m46tfoM
if (j < size %26amp;%26amp; queue[j] j++; 4cL=f
if (queue[k]>queue[j]) file://不用交换 JaTW/~ TU
break; S|i //I%_
SortUtil.swap(queue,j,k); JD.z}2+
k = j; kSrzIq<xre
} @:8|tJu8b
} 7hQl,v< 5
private void fixUp(int k) { awtzt?VtLh
while (k > 1) { 6&cU*Io@
int j = k >> 1; \^D`Hvg
if (queue[j]>queue[k]) AUd}) UR
break; q2Dg~et
SortUtil.swap(queue,j,k); GH!#"Sl8Z
k = j; -.G0k*[d
} Z7/lFS'~N
} f+RDvgkKU
?J AzN
} 9w|q':<
3H2'HO
} GQQ6 t
/vU31_eZt
SortUtil： A1@a:P=
C.Yz<?;S
package org.rut.util.algorithm; 0 $r{h}[^c
eAEVpC2
import org.rut.util.algorithm.support.BubbleSort; UbXz`i
import org.rut.util.algorithm.support.HeapSort; xC]/i(+bA
import org.rut.util.algorithm.support.ImprovedMergeSort; aeIR}'H|
import org.rut.util.algorithm.support.ImprovedQuickSort; g>{=R|uO5
import org.rut.util.algorithm.support.InsertSort; +-i@R%
import org.rut.util.algorithm.support.MergeSort; s4\2lBU?
import org.rut.util.algorithm.support.QuickSort; -u(#V#}OV?
import org.rut.util.algorithm.support.SelectionSort; KA7nncg;,
import org.rut.util.algorithm.support.ShellSort; yCVBG
:nn'>
/** xMu6PM<l
* @author treeroot -`JY] H
* @since 2006-2-2 N_U D7P1
* @version 1.0 Ex{]<6UAu
*/ `K.yE0^i
public class SortUtil { o>h>#!e
public final static int INSERT = 1; m;|I}{r
public final static int BUBBLE = 2; J=Z"sU=
public final static int SELECTION = 3; 4ai3@f5
public final static int SHELL = 4; G9TUU.T
public final static int QUICK = 5; K!j2AP3
public final static int IMPROVED_QUICK = 6; W&nVVV8s@
public final static int MERGE = 7; a7ty&[\
public final static int IMPROVED_MERGE = 8; v2^CBKZ+
public final static int HEAP = 9; g|Cnj
y[# U/2
public static void sort(int[] data) { Z~ (QV0}
sort(data, IMPROVED_QUICK); j&r5oD;
} ofV{SeD67
private static String[] name={ /$KW$NH4z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pbNVj~#6
}; 2P*O^-zRp
}#1g;
private static Sort[] impl=new Sort[]{ i@6 kIC
new InsertSort(), uQ}kq7gd
new BubbleSort(), "lm3o(Dk
new SelectionSort(), -ydT%x
new ShellSort(), u=5^xpI<D
new QuickSort(), k 'o?/
new ImprovedQuickSort(), `Bx CTwc
new MergeSort(), 4R.#=]F
new ImprovedMergeSort(), \4DH&gZ[
new HeapSort() kK(,FB
}; e): &pqA
! d(,t[cV
public static String toString(int algorithm){ gw-l]@;1
return name[algorithm-1]; _~r>C
} "&~Um U4CN
b@k3y9&
public static void sort(int[] data, int algorithm) { wcO_;1_ H
impl[algorithm-1].sort(data); 6N^FJCs
} &7cy9Z~m
z]pH'c39
public static interface Sort { MC3{LVNK
public void sort(int[] data); qQQ~[JL
} i=+ "[h^
tO#y4<
public static void swap(int[] data, int i, int j) { #Uo 9BM
int temp = data; <?!#QA
data = data[j]; 3:r;(IaX
data[j] = temp; dCBJV
} D<:9pLD(
} 2KU[Yd