[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; ?04jkq&
} RSfB9)3D
int i1=l; Nm{+!}cC
int i2=mid+1; ^LI\W'K
for(int cur=l;cur<=r;cur++){ 0r_3:#Nn
if(i1==mid+1) 53X i)
data[cur]=temp[i2++]; Lm-f0\(
else if(i2>r) d/"%fpp^0G
data[cur]=temp[i1++]; NqlU?
else if(temp[i1] data[cur]=temp[i1++]; g5&ZXA
else @23?II$=@
data[cur]=temp[i2++]; ]EN+^i1F[
} b6%[?k
} nyoLrTs{
=67ab_V
} 'G1~ A +
] /"!J6(e
改进后的归并排序: <lkt'iT=Sz
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package org.rut.util.algorithm.support; tf3R
@ ^q}.u`
import org.rut.util.algorithm.SortUtil; gB<1;_KW
sB@9L L]&|
/** <`V_H~Z
* @author treeroot /Moyn"Kj{
* @since 2006-2-2 $RA+StF!]
* @version 1.0 u<U8LR=)V5
*/ BCmKzv
public class ImprovedMergeSort implements SortUtil.Sort { x'v-]C(@
M7fPaJKL
private static final int THRESHOLD = 10; ]>/oo=E
1rIL[(r4
/* wzj:PS
* (non-Javadoc) t`- [
* 'u#c_m!9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %$<v:eMAs
*/ g [u*`]-;v
public void sort(int[] data) { 3o2x&v
int[] temp=new int[data.length]; M?00n< vM
mergeSort(data,temp,0,data.length-1); ?!.L#]23f
} $ba*=/{[q
QQ/9ZI5
private void mergeSort(int[] data, int[] temp, int l, int r) { cK-jN9U
int i, j, k; /s~BE ,su
int mid = (l + r) / 2; Sa-" G`
if (l == r) WR9-HPF
return; l h?[wc
if ((mid - l) >= THRESHOLD) ^v&"{2
mergeSort(data, temp, l, mid); 2c'<rkA
else @x^/X8c(p
insertSort(data, l, mid - l + 1); E#E&z(G2
if ((r - mid) > THRESHOLD) ?X+PNw|pf
mergeSort(data, temp, mid + 1, r); z.!u<hy(
else 'Yaq; mDY
insertSort(data, mid + 1, r - mid); y5j ;Daq
l>T]Y
for (i = l; i <= mid; i++) { !ir%Pz^)
temp = data; _n0NE0
} dbg%n 0h
for (j = 1; j <= r - mid; j++) { .)E1|U[L
temp[r - j + 1] = data[j + mid]; SAU` u]E
} 9aYVbq""
int a = temp[l]; 1XpqnyL&
int b = temp[r]; ,ZZ5A;)
for (i = l, j = r, k = l; k <= r; k++) { KP`Pzx
if (a < b) { O<J<)_W)
data[k] = temp[i++]; yb-4[C:i
a = temp; F9>"1
} else { !ZM*)6^
data[k] = temp[j--]; FP")$ ,=s
b = temp[j]; <r)5jf
} )=!|^M
} s)+] pxV0-
} Q]]M;(
N+vsQ!Qz
/** P=a&>i
* @param data <Wd_m?z
* @param l Rl (+TE
* @param i {5 3#Xd
*/ 5'[yw:P-8
private void insertSort(int[] data, int start, int len) { -,ojZFyRi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x=N0H
} !FQS9SoO9
} ;)vs=DK:)
} 9R:?vk4
} \okvL2:!
YpvFv-
堆排序： `ghNS
pS8`OBenA
package org.rut.util.algorithm.support; g(R!M0hdF
16"L;r
import org.rut.util.algorithm.SortUtil; pIPjTQ?cq
! QKec
/** a fB?js6
* @author treeroot 4rypT-%^;
* @since 2006-2-2 "uBr]N:
* @version 1.0 Pu}PE-b
*/ fK{Z{)D
public class HeapSort implements SortUtil.Sort{ 3=_to7]
^t[br6G
/* (non-Javadoc) DCgiTT\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6W'2w?qj?4
*/ ^mZTki4
public void sort(int[] data) { iJk/fvi
MaxHeap h=new MaxHeap(); ^3nB2G.ax
h.init(data); G 'CYvV
for(int i=0;i h.remove(); C7!=LiK}
System.arraycopy(h.queue,1,data,0,data.length); Ws[d.El
} wQU-r|
,]=Qgn
private static class MaxHeap{ ;{rl Y>
^Y^5 @x=
void init(int[] data){ &uJ7[m19z
this.queue=new int[data.length+1]; 9z(h8H
for(int i=0;i queue[++size]=data; [,qb) &_
fixUp(size); }J:WbIr0!
} <PQ[N[SU
} uzLIllVX*
jqy?Od)
private int size=0; Xqas[:)7+
V__n9L/t
private int[] queue; }u~r.=
Jm}zit:o
public int get() { :6frx=<
return queue[1]; d?(eL(W
} e7gWz~
[>f4&yY
public void remove() { Y&DC5T]
SortUtil.swap(queue,1,size--); d*<goBd
fixDown(1); "O{:jfq
} ctL,Mqr\Z
file://fixdown Jx= v6==7
private void fixDown(int k) { R P6R1iN3
int j; ~TALpd
while ((j = k << 1) <= size) { g/m%A2M&aH
if (j < size %26amp;%26amp; queue[j] j++; UkBr4{+aE
if (queue[k]>queue[j]) file://不用交换 $kk!NAW
break; (#k2S-5
SortUtil.swap(queue,j,k); ?\Z-3l%M
k = j; D`uOBEX
} pxs`g&3yd
} u<{uUui}$v
private void fixUp(int k) { #$9rH 2zd
while (k > 1) { z|>f*Z
int j = k >> 1; [8.w2\<?
if (queue[j]>queue[k]) \muC_9ke
break; kihO~<
SortUtil.swap(queue,j,k); (T0%H<#+
k = j; UBxQ4)%
} 6~v|pA jY
} goV[C]|
G|Y9F|.!
} *QpKeI
a<K@rgQ
} x?|
,4%'~8'3
SortUtil： 8o;9=.<<~u
`Z0#IeX=
package org.rut.util.algorithm; e RjpR?!\
Zj8aD-1]U^
import org.rut.util.algorithm.support.BubbleSort; Xpd^^
import org.rut.util.algorithm.support.HeapSort; 7)Rx-
import org.rut.util.algorithm.support.ImprovedMergeSort; (_ElM>
import org.rut.util.algorithm.support.ImprovedQuickSort; }Ik{tUS$
import org.rut.util.algorithm.support.InsertSort; xFY;aK
import org.rut.util.algorithm.support.MergeSort; T+[N-"N
import org.rut.util.algorithm.support.QuickSort; h4^ a#%$
import org.rut.util.algorithm.support.SelectionSort; 6"W~%FSJX
import org.rut.util.algorithm.support.ShellSort; x1kb]0s<-
X|7Y|0o
/** }GCt)i_
* @author treeroot +)fl9>Mb
* @since 2006-2-2 #`mo5
* @version 1.0 p|M 8ww
*/ [EJ[Gg0m
public class SortUtil { Hs+VA$$*
public final static int INSERT = 1; *_z5Pa`A
public final static int BUBBLE = 2; B&`hvR
public final static int SELECTION = 3; \@4_l?M
public final static int SHELL = 4; T}X#I'Z
public final static int QUICK = 5; \gL H_$}
public final static int IMPROVED_QUICK = 6; @hiwq7[j
public final static int MERGE = 7; hb"t8_--c
public final static int IMPROVED_MERGE = 8; DH_Mll>
public final static int HEAP = 9; OgfmyYMtc
h&Ehp
public static void sort(int[] data) { EIwTx:{F
sort(data, IMPROVED_QUICK); O=#FpPHrdw
} _1`*&k JL~
private static String[] name={ x(z[S$6Y\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _gB`;zo
}; 9(Vq@.;Z`j
b$nXljV4?
private static Sort[] impl=new Sort[]{ qDO4&NO
new InsertSort(), $LZf&q:\]*
new BubbleSort(), s!09Pxc
new SelectionSort(), Gv}*Tw$
new ShellSort(), 8ltHR]v
new QuickSort(), m El*{]
new ImprovedQuickSort(), a$g4)0eS
new MergeSort(), 0CxQ@~ttl
new ImprovedMergeSort(), W 0Q-&4
new HeapSort() o*\kg+8
}; hq/\'Z&!+P
F9ry?g=h
public static String toString(int algorithm){ 8h~v%aZ1
return name[algorithm-1]; uYS?# g
} pFGK-J
/!UuGm
public static void sort(int[] data, int algorithm) { G.O0*E2V
impl[algorithm-1].sort(data); =eSG7QfS
} PEoOs
C8y 3T/G
public static interface Sort { L*9^-,
public void sort(int[] data); _h7+.U=
} 'bkecC
d5]9FIj
public static void swap(int[] data, int i, int j) { BG"~yyKA
int temp = data; 3~BL!e,
data = data[j]; e%j+,)Ry
data[j] = temp; (hd^
} bmc1S
} tsU.c"^n