[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; ~}i&gd|(
} \@8$tQCZ
int i1=l; 2N9 BI-a
int i2=mid+1; \3hhM}6)DM
for(int cur=l;cur<=r;cur++){ [58xT>5`m
if(i1==mid+1) %XMrSlSOp
data[cur]=temp[i2++]; ` Cdk b5
else if(i2>r) a9(1 6k
data[cur]=temp[i1++]; W r);A{
else if(temp[i1] data[cur]=temp[i1++]; <:W]uT
else WhMr'l/e
data[cur]=temp[i2++]; #^"\WG7{
} yrs![u
} :\NqGS=<
(?72 vCc
} M6jP>fbV*
sT?Qlj'Zd
改进后的归并排序: <bDjAVq
tMad 2,:
package org.rut.util.algorithm.support; KIps{_J[<
F=EAD3
import org.rut.util.algorithm.SortUtil; -ytSS:|%\
#9,!IW]l
/** 9qc1^Fs~
* @author treeroot @`t)ly#N
* @since 2006-2-2 gz;().{
* @version 1.0 o) `zb?
*/ p^Kp= z
public class ImprovedMergeSort implements SortUtil.Sort { vtc} )s\
U#gHc:$
private static final int THRESHOLD = 10; Pwt4e-
>&f .^p
/* gEcVQPD@
* (non-Javadoc) (9CB&LZ(+E
* '""qMRCm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .;u(uB;J6
*/ 43W>4fsc
public void sort(int[] data) { R4"["T+L`
int[] temp=new int[data.length]; (d |
mergeSort(data,temp,0,data.length-1); $h0]
} OY*BVJ^
X4>c(1e
private void mergeSort(int[] data, int[] temp, int l, int r) { wO@b=1j
int i, j, k; 5r.\maW
int mid = (l + r) / 2; y,tA~
if (l == r) $NJ]2P9L
return; iOm~
if ((mid - l) >= THRESHOLD) .7ESPr
mergeSort(data, temp, l, mid); 2-ev7:
else c=<d99Cu!
insertSort(data, l, mid - l + 1); C"PN3>x}j
if ((r - mid) > THRESHOLD) hun LV8z
mergeSort(data, temp, mid + 1, r); a5{CkM&,(
else f&bY=$iff
insertSort(data, mid + 1, r - mid); [Qa0uM#SU
s[)2z3
for (i = l; i <= mid; i++) { (pm]U7
temp = data; e,>L&9] ZI
} #\"8sY,j
for (j = 1; j <= r - mid; j++) { JAj<*TB.%
temp[r - j + 1] = data[j + mid]; aSi:(w
} xojy[c#
int a = temp[l]; w:I^iI.
int b = temp[r]; sTU]ntoQqR
for (i = l, j = r, k = l; k <= r; k++) { 6cp x1y]~6
if (a < b) { +j_Vs+0
data[k] = temp[i++]; EB)j&y_
a = temp; &STgj|t_
} else { O?L_9L*
data[k] = temp[j--]; ' jR83A*
b = temp[j]; XA5gosq
} F'lG=c3N
} HdGAE1eU]}
} ,GS8Gu
BhJqMK>'S
/** pOS:/~I3
* @param data ;XSRG*3j~4
* @param l b{)9?%_
* @param i Hq8<g$
*/ zh2$U dZ|M
private void insertSort(int[] data, int start, int len) { TKvUBy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yc8FEn!)&
} 1 h|cr_
} E)o/C(g
} HuBG?4Qd
} + 1\1Z@\M
4JKB6~Y
堆排序： Vj_(55WQ
g3 6oEz~|
package org.rut.util.algorithm.support; 8Y3c,p/gS>
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import org.rut.util.algorithm.SortUtil; eft-]c+*0
{H#1wu^]O$
/** ]|<PV5SY3.
* @author treeroot V:9|9$G
* @since 2006-2-2 s@OCj0'l
* @version 1.0 X ~%I(?OX
*/ @y[Zr6\z
public class HeapSort implements SortUtil.Sort{ .%+'Ts#ie
Y}7'OM
/* (non-Javadoc) }]>[FW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 18z{d9'F
*/ ,RKBGOz?f
public void sort(int[] data) { I7r{&X) D
MaxHeap h=new MaxHeap(); YR'?fr
h.init(data); E0$UoP
for(int i=0;i h.remove(); 'Sppm;?
System.arraycopy(h.queue,1,data,0,data.length); K20n355uE
} TDBWYppM
BWFl8 !_X
private static class MaxHeap{ /p~"?9b[ i
\)eHf 7H
void init(int[] data){ ~0w7E0DE[
this.queue=new int[data.length+1]; J5)e 7
for(int i=0;i queue[++size]=data; 91r9RG>
fixUp(size); yZ~<! 5.P
} EXH{3E54)`
} SJoQaR,)>
yc|C}oQF
private int size=0; "5 PP<A,F(
X5U_|XK6Y
private int[] queue; T#6']D
q#LwM]<.@>
public int get() { 7s;<5xc
return queue[1]; D$q"k"
} |Yh-`~~A"
5'@J}7h
public void remove() { [&|Le;h
SortUtil.swap(queue,1,size--); V.)y7B
fixDown(1); @;qC% +^
} {S%)GvrT
file://fixdown yT`[9u,
private void fixDown(int k) { 0aQtJ0e16
int j; kFgN^v^t
while ((j = k << 1) <= size) { 6[$kEKOY=
if (j < size %26amp;%26amp; queue[j] j++; wYSvI
if (queue[k]>queue[j]) file://不用交换 4q/E7n
break; Fkuq'C<|Y
SortUtil.swap(queue,j,k); D;Fvd:
k = j; >9a%"<(2#
} V"%2Tz
} I+D`\OSL
private void fixUp(int k) { tBtJRi(
while (k > 1) { nT`NfN
int j = k >> 1; </t_<I0{
if (queue[j]>queue[k]) T?!^-PD9*
break; ehtiu!Vk
SortUtil.swap(queue,j,k); (M4~N)7<P5
k = j; >C+0LF`U
} 3:<+9X
} $5GvF1
E}lU?U5i
} a({qc0+UK
_DMj)enH"
} c=I!?a"
jz't!wj
SortUtil： {.bLh0
5 usfyY]z
package org.rut.util.algorithm; daaUC
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import org.rut.util.algorithm.support.BubbleSort; a[\,K4l
import org.rut.util.algorithm.support.HeapSort; S+ymdZ)xZ`
import org.rut.util.algorithm.support.ImprovedMergeSort; HB{-^9{E
import org.rut.util.algorithm.support.ImprovedQuickSort; +'>N]|Z
import org.rut.util.algorithm.support.InsertSort; 0(Y$xg
import org.rut.util.algorithm.support.MergeSort; [?RLvhU|
import org.rut.util.algorithm.support.QuickSort; TSdjX]Kf
import org.rut.util.algorithm.support.SelectionSort; DX}EOxO,.
import org.rut.util.algorithm.support.ShellSort; w4'(Y,(`
MVjc.^
/** XtT;UBE
* @author treeroot Bh:AY@k
* @since 2006-2-2 j8?$Hk
* @version 1.0 Q&(?D
*/ w!:u|
public class SortUtil { .!KlN%As
public final static int INSERT = 1; [4 g5{eX
public final static int BUBBLE = 2; [A|W0
public final static int SELECTION = 3; *0i
public final static int SHELL = 4; 4v3y3
public final static int QUICK = 5; (Ew o
public final static int IMPROVED_QUICK = 6; {5.,gb@6
public final static int MERGE = 7; *`ehI_v :
public final static int IMPROVED_MERGE = 8; l6xC'c,jg
public final static int HEAP = 9; }CsUZ&*&
5U|f"3&8
public static void sort(int[] data) { ijr*_=
sort(data, IMPROVED_QUICK); 00U8<~u
} Xa*52Q`_
private static String[] name={ T=VVK6Lc:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .}ohnnJB0
}; KK(x)(
HGWwGd
private static Sort[] impl=new Sort[]{ TmKO/N@}
new InsertSort(), BS*cG>T
new BubbleSort(), #Vv*2Mc
new SelectionSort(), qw%4j9}
new ShellSort(), NxNR;wz>l
new QuickSort(), @MtF^y
new ImprovedQuickSort(), BRQ9kK20
new MergeSort(), :eQ@I+
new ImprovedMergeSort(), 3, ,Z
new HeapSort() IL3,dad'^
}; 5ez"B]&T
5zpk6FR$
public static String toString(int algorithm){ mt fDl;/D
return name[algorithm-1]; H\8i9RI
} (oq(-Wv
@WhcY*R2
public static void sort(int[] data, int algorithm) { akm)X0!-}
impl[algorithm-1].sort(data); xVfJ]Y
} uAzVa!)
t1Hd-]28V
public static interface Sort { ;TmwIZ
public void sort(int[] data); D: JGd$`
} *X%`MN
BTjF^&`
public static void swap(int[] data, int i, int j) { x9Gm)~
int temp = data; Ip8 Ap$
data = data[j]; lxbbyy25
data[j] = temp; PwF}yxkI
} Ng'f u|
} -jC. dz