[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; j0Os]a
} ]lE5^<<
int i1=l; aSHN*tP%y
int i2=mid+1; uz=9L<$
for(int cur=l;cur<=r;cur++){ HoWK#Nz\
if(i1==mid+1) `G*fx=N
data[cur]=temp[i2++]; I,& gKgh
else if(i2>r) Jiru~Vo+
data[cur]=temp[i1++]; b#t5Dve
else if(temp[i1] data[cur]=temp[i1++]; XQ}7.u!
else Fy.!amXu
data[cur]=temp[i2++]; N"~P$B1X
} r(n>N0:0Ls
} v6=X]Ji{YA
"(';UFa
} pB%oFWqK
^HI2Vp
改进后的归并排序: 20J-VN:
X .K*</(g
package org.rut.util.algorithm.support; :inVwc
|^F$Ta
import org.rut.util.algorithm.SortUtil; j*1MnP3/8Y
^ ~Tn[w W_
/** ;vpq0t`
* @author treeroot W}(T5D" 3x
* @since 2006-2-2 %)&Tr`
* @version 1.0 65RD68a
*/ g(Oor6Pp
public class ImprovedMergeSort implements SortUtil.Sort { ;MlPP)*k
; =*=P8&5
private static final int THRESHOLD = 10; Uhyf
cN\_1
/* 7s}F`fjKP
* (non-Javadoc) 1h)K3cC
* Hbu :HFJ!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;oVOq$ql
*/ n \&H~0X
public void sort(int[] data) { /WX&UAG
int[] temp=new int[data.length]; Ru);wzky
mergeSort(data,temp,0,data.length-1); @bnw$U`+
} &{q'$oF
0B~x8f
private void mergeSort(int[] data, int[] temp, int l, int r) { Sm|TDH
int i, j, k; Upg8t'%{op
int mid = (l + r) / 2; nmuU*oL
if (l == r) AOTtAV_e
return; y4&x`|tv
if ((mid - l) >= THRESHOLD) m-cw5lW
mergeSort(data, temp, l, mid); moMNd(p
else a [f}-t9
insertSort(data, l, mid - l + 1); `\=~ $&vjC
if ((r - mid) > THRESHOLD) ~!%G2E!
mergeSort(data, temp, mid + 1, r); %[o($a$
else '#QZhz(+
insertSort(data, mid + 1, r - mid); !y2yS/
#TeAw<2U
for (i = l; i <= mid; i++) { <v\x<ul6
temp = data; rQPO+
} t+0/$
for (j = 1; j <= r - mid; j++) { '68#7Hs.
temp[r - j + 1] = data[j + mid]; B.gEV*@
} MY(51)*
int a = temp[l]; ~BnmAv$m[
int b = temp[r]; W3R43>$
for (i = l, j = r, k = l; k <= r; k++) { nwDGzC~y<
if (a < b) { dXU6TCjU7
data[k] = temp[i++]; ?]TtUoY=)F
a = temp; r -uu`=,
} else { D<*)^^
data[k] = temp[j--]; b%VZPKA;
b = temp[j]; ,}Im^~5
} |n(b>.X
} #!r>3W&
} FIQHs"#T
CXi:?6OG
/** V[7D4r.j
* @param data A\.{(,;kp
* @param l ykGA.wo7/P
* @param i :"Rx$;a
*/ dw| VH1fS
private void insertSort(int[] data, int start, int len) { aq(i^d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GAh\6ul
} H8Z|gq1r
} &nY#GHB
} O}6*9Xy
} JbXi|OS/
F C=N}5u
堆排序： 9*r l7
e8z?) 4T
package org.rut.util.algorithm.support; <DEu]-'>
5R1?jlm
import org.rut.util.algorithm.SortUtil; (Q.I DDlr
}|znQ3A2\l
/** l o- 42)
* @author treeroot ;g<y{o"Q3p
* @since 2006-2-2 OgCNqW d-
* @version 1.0 bhfC2@
*/ '\"5qB
public class HeapSort implements SortUtil.Sort{ nKjT&R
wiM4,
/* (non-Javadoc) SJsbuLxR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jRW@$ <mG
*/ P|;f>*^Y
public void sort(int[] data) { J d,9<m$
MaxHeap h=new MaxHeap(); shVEAT'`
h.init(data); >#Bu [nD%
for(int i=0;i h.remove(); Z07n>|WF-
System.arraycopy(h.queue,1,data,0,data.length); LvL2[xh%&
} 7<X!Xok
lKS 2OOYC`
private static class MaxHeap{ o9OCgP`Y
NezE]'}
void init(int[] data){ MK!Aq^Jz
this.queue=new int[data.length+1]; L#!m|_Mz
for(int i=0;i queue[++size]=data; }%0X7'
fixUp(size); _gl1Qtv@rf
} J!@R0U.
} hF5(1s}e$
LK>;\BRe?
private int size=0; &Cr4<V6-q
Z55C4F5v
private int[] queue; :fnK`RnaQ
6 8Vxy
public int get() { iY5V4Gbo
return queue[1]; !3z ;u8W
} 1buO&q!vn
YuoIhT
public void remove() { nrbP3sf*
SortUtil.swap(queue,1,size--); d$n<^~Z
fixDown(1); Z!l]v.S
} Nema>T]
file://fixdown G"Hj$
private void fixDown(int k) { :_o^oi7G
int j; oZi{v]4
while ((j = k << 1) <= size) { U/h@Q\~U
if (j < size %26amp;%26amp; queue[j] j++; Z,8t!Y
if (queue[k]>queue[j]) file://不用交换 *lQa^F
break; CKC5S^Mx
SortUtil.swap(queue,j,k); VWqZ`X
k = j; wv Mp~
} +HG*T[%/
} P4 #j;k4P
private void fixUp(int k) { KD--w(4
while (k > 1) { `A8ErfA
int j = k >> 1; @H}Hjg_>m
if (queue[j]>queue[k]) ?^`fPH=
break; dKa2_|k'
SortUtil.swap(queue,j,k); {~XnmBs
k = j; ff00s+
} &+yoPF
} v'r)d-T
;f)AM}~^Q
} (,cG+3r]
C3(h j
} :Vw{ lB
o3h>)4
SortUtil： Hk=HO|&<XB
r4b-.>w
package org.rut.util.algorithm; S7~HBgS<
Mu6DTp~k
import org.rut.util.algorithm.support.BubbleSort; -]QP#_
import org.rut.util.algorithm.support.HeapSort; er3`ITp:dp
import org.rut.util.algorithm.support.ImprovedMergeSort; <*oV-A
import org.rut.util.algorithm.support.ImprovedQuickSort; 'c3'eJ0
import org.rut.util.algorithm.support.InsertSort; B|'}HBkP
import org.rut.util.algorithm.support.MergeSort; Tf('iZ2+
import org.rut.util.algorithm.support.QuickSort; wNmC1HOh
import org.rut.util.algorithm.support.SelectionSort; h,,B"vPS
import org.rut.util.algorithm.support.ShellSort; 4b6)+*[O
^@Z8_PZo
/** ^|2m&2
* @author treeroot FwD q@Oj
* @since 2006-2-2 ^$[iLX
* @version 1.0 2HF`}H)H
*/ 8i)9ho<
public class SortUtil { !-ZY_
public final static int INSERT = 1; 1X9J[5|ll
public final static int BUBBLE = 2; |f(*R_R
public final static int SELECTION = 3; "akAGa!V+
public final static int SHELL = 4; dEW= V"W
public final static int QUICK = 5; mmy/YP)
public final static int IMPROVED_QUICK = 6; v7%}ey[
public final static int MERGE = 7; J|<C;[du>
public final static int IMPROVED_MERGE = 8; Np/vPaAk
public final static int HEAP = 9; dXsD%sG@
Oz)/KZ
public static void sort(int[] data) { z";(0%
sort(data, IMPROVED_QUICK); W{~ y< `D
} ES8(:5
private static String[] name={ \r [@A3O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7OS i2
}; : t/0
aX Ie
private static Sort[] impl=new Sort[]{ xC}'"``s
new InsertSort(), @#;*e] 1a
new BubbleSort(), \C4wWh-A
new SelectionSort(), 8~&=vc
new ShellSort(), 6?[SlPPE1
new QuickSort(), ,LDL%<7t
new ImprovedQuickSort(), @Bn4ZFB@
new MergeSort(), W>:MK-_J
new ImprovedMergeSort(), w^,Xa
new HeapSort() =&(e*u_
}; 5".bM8o
@.`k2lxGd~
public static String toString(int algorithm){ '(g;nU<
return name[algorithm-1]; m_,Jbf
} ]'$:Y
0G2Y_A&e**
public static void sort(int[] data, int algorithm) { -Kcjnl92i
impl[algorithm-1].sort(data); 9}Ge@a<j
} s)KlKh
4t3>`x 7
public static interface Sort { ]q4(%Q
public void sort(int[] data); VE}r'MBk
} 'fCSP|
G5RdytK
public static void swap(int[] data, int i, int j) { u]i%<Yy89
int temp = data; {7;QZk(
data = data[j]; ,t:P
data[j] = temp; Ge7B%p8
} W1Ye+vg/s
} =E^/gc%X