[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; VjSA&R
} s3)T}52
int i1=l; >kV=h?]Y
int i2=mid+1; HmpV; <t3
for(int cur=l;cur<=r;cur++){ (Jy >,~O
if(i1==mid+1) *%dWNvN4X
data[cur]=temp[i2++]; !Mk]%
else if(i2>r) Z?'?+48xv4
data[cur]=temp[i1++]; l 4cTN @E
else if(temp[i1] data[cur]=temp[i1++]; 6 wD
else -:V2Dsr6;
data[cur]=temp[i2++]; f q*V76F
} 'L6+B1Op
} PLWx'N-kqL
&&n-$WEl
} j2:A@a6
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改进后的归并排序: .Tc?9X~4
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package org.rut.util.algorithm.support; i'0ol^~y6
j"<F?k@`Q
import org.rut.util.algorithm.SortUtil; [u8JqX
YfH+kDT
/** j`"cU$NRM
* @author treeroot oz?6$oE(bt
* @since 2006-2-2 ;Z#DB$o\
* @version 1.0 cK2Us+h
*/ S]DYEL$
public class ImprovedMergeSort implements SortUtil.Sort { g8;JpPw
SZC1$..2T
private static final int THRESHOLD = 10; 5,?Au
t-w4rXvF
/* sKOy6v
* (non-Javadoc) 0bG2YMs
* PciiDh~/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ON$-g_s>)
*/ tJ9`Ys
public void sort(int[] data) { O0>^?dsL
int[] temp=new int[data.length]; 2<+9lk
mergeSort(data,temp,0,data.length-1); 2a:JtJLl
} CFx$r_!~
Og<UW^VR
private void mergeSort(int[] data, int[] temp, int l, int r) { YS&Q4nv-
int i, j, k; ^1+&)6s7V
int mid = (l + r) / 2; \YsYOFc|
if (l == r) 9@z"~H
return; TWJ%? /d
if ((mid - l) >= THRESHOLD) ?1MaA
mergeSort(data, temp, l, mid); v]BMET[w
else )WazbT@
insertSort(data, l, mid - l + 1); XDq*nA8#5B
if ((r - mid) > THRESHOLD) l050n9#9p
mergeSort(data, temp, mid + 1, r); $Z^HI
else . vQCX1V(
insertSort(data, mid + 1, r - mid); j*N:Kdzvl
JIU=^6^2'
for (i = l; i <= mid; i++) { R>. %0%iq
temp = data; `}fwR
} <f`G@
for (j = 1; j <= r - mid; j++) { a;e~D 9%1
temp[r - j + 1] = data[j + mid]; [0mg\n?
} Mi_/ ^
int a = temp[l]; \py \rI
int b = temp[r]; fP:g}Z
for (i = l, j = r, k = l; k <= r; k++) { )%&~CW+
if (a < b) { xA2"i2k9
data[k] = temp[i++]; ,_2ZKO/k$
a = temp; :*/`"M)'
} else { Ta3qEVs
data[k] = temp[j--]; 7{e*isV
b = temp[j]; @s;qmBX4
} Q'S"$^~{
} k\a&4v
} JA~v:ec
k),.
/** J-g<-!>RM
* @param data myeez+@ m
* @param l BSB;0OM
* @param i +1%7*2q,
*/ ^5sO;vf
private void insertSort(int[] data, int start, int len) { 8/dx)*JCq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u:f.g?!`"
} 5L4{8X0X8
} 3KW4 ]qo~
} gK8{=A0c
} Vyqj)1Z8>
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堆排序： :v!e8kM\x
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package org.rut.util.algorithm.support; ]hL`HP
t$lO~~atr
import org.rut.util.algorithm.SortUtil; ~SRK}5E
Y[ciT)
/** $Dm2>:Dmt
* @author treeroot 'dstAlt?
* @since 2006-2-2 '-7rHx
* @version 1.0 Ej]:j8^W
*/ "ebm3t@C
public class HeapSort implements SortUtil.Sort{ S3iXG @
~S,R`wo
/* (non-Javadoc) kgV_*0^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eJJD'Z
*/ rv\m0*\<
public void sort(int[] data) { N1 }#6YNw
MaxHeap h=new MaxHeap(); K*_5M
h.init(data); m["`Op4
for(int i=0;i h.remove(); V_T.#"C4=z
System.arraycopy(h.queue,1,data,0,data.length); n@)Kf A)&
} zMf.
^"e|)4_5\
private static class MaxHeap{ Is $I;`
^T#bla893
void init(int[] data){ #ONad0T;
this.queue=new int[data.length+1]; |ZAR!u&0
for(int i=0;i queue[++size]=data; 5DEK`#*
fixUp(size); 0 xUw}T6
} O#g'4 S
} }j/($,
#MyR:V*a
private int size=0; ,u1Yn}
W/3,vf1
private int[] queue; 7)`U%}R
ke sg]K
public int get() { :QGd/JX$n`
return queue[1]; 2|KgRk|!
} s^{hdCCl67
[!ghI%VK
public void remove() { PE~umY]
SortUtil.swap(queue,1,size--); _qq> 43
fixDown(1); CHeU?NtFps
} Stkyz:,(
file://fixdown Ca&5"aki
private void fixDown(int k) { 0Y_?r$M
int j; {hzU
while ((j = k << 1) <= size) { (|<e4HfZL
if (j < size %26amp;%26amp; queue[j] j++; <,r|*pkhp~
if (queue[k]>queue[j]) file://不用交换 %MQU&H9[
break; &o$z[b
SortUtil.swap(queue,j,k); gkJL=,
k = j; \pXs&}%1,F
} SM;*vkwz~
} i:6`Rmz1.
private void fixUp(int k) { $?.0>0,<
while (k > 1) { )AxgKBW
int j = k >> 1; F%t_9S,)O
if (queue[j]>queue[k]) ADTx _tE
break; 7hs1S|
SortUtil.swap(queue,j,k); J|9kWjOf+i
k = j; Uq:WW1=kh
} G% |$3
} eDh]uKg
IMKyFp]h-
} J4yL"iMt
Ry@QJn I<
} UE-<
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SortUtil： dr|>P*
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package org.rut.util.algorithm; "$->nC.
3D"2yTM(
import org.rut.util.algorithm.support.BubbleSort; RObo4
import org.rut.util.algorithm.support.HeapSort; e;+6U"Jx*
import org.rut.util.algorithm.support.ImprovedMergeSort; 4GA9oLl
import org.rut.util.algorithm.support.ImprovedQuickSort; Wchu-]
import org.rut.util.algorithm.support.InsertSort; toq/G,N Q
import org.rut.util.algorithm.support.MergeSort; @H{QHi
import org.rut.util.algorithm.support.QuickSort; B-oQ 9[~
import org.rut.util.algorithm.support.SelectionSort; rd*`8B
import org.rut.util.algorithm.support.ShellSort; 8T7ex(w
)w?DB@Tx
/** L}E~CiL0n
* @author treeroot 2 L>;M
* @since 2006-2-2 WR&>AOWAD
* @version 1.0 F/ZB%;O9
*/ _JVFn=
public class SortUtil { }?KvT$s
public final static int INSERT = 1; "!ZQ`yl
public final static int BUBBLE = 2; HHT_}_?
public final static int SELECTION = 3; R&>G6jZ?8
public final static int SHELL = 4; <G9HVMiP
public final static int QUICK = 5; .!fhy[%o:D
public final static int IMPROVED_QUICK = 6; :y/1Jf'2f
public final static int MERGE = 7; 03ol6y )C
public final static int IMPROVED_MERGE = 8; WpPm|h
public final static int HEAP = 9; 4LEWOWF}
r8.`W\SKX
public static void sort(int[] data) { ($Cy-p
sort(data, IMPROVED_QUICK); #%4XZ3j#j;
} "!V-@F$@N
private static String[] name={ R`[jkJrc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ''bh{ .x
}; DFgQ1:6[
?Uq;>
private static Sort[] impl=new Sort[]{ -YDA,.Ic?
new InsertSort(), 0}'xoYv f
new BubbleSort(), XniPNU
new SelectionSort(), !"v[\||1
new ShellSort(), Re=()M
new QuickSort(), 9J3@8h p
new ImprovedQuickSort(), 4YuJ-
new MergeSort(), %^bHQB%
new ImprovedMergeSort(), 'YKzs;y$
new HeapSort() )x!b{5'"7
}; Xkqq$A4
Uuxx^>"h\
public static String toString(int algorithm){ PBeBI:
return name[algorithm-1]; Su]@~^w
} sf([8YUd
#r=Jc8J_
public static void sort(int[] data, int algorithm) { i\zVP.c])*
impl[algorithm-1].sort(data); x0KW\<k
} </hv{<
IP LKOT~
public static interface Sort { syJLcK+e
public void sort(int[] data); ?*)Q[P5
} $ Jz(Lb{
]C;X/8'Jf5
public static void swap(int[] data, int i, int j) { x%v[(*F#y
int temp = data; e3#0r
data = data[j]; %ER"Udh
data[j] = temp; a2!U9->!
} z4qc)- {L
} URd0|?t9^L