[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; bv]SR_Tiq
} qtAt=` s
int i1=l; w#A\(z%;x
int i2=mid+1; ^\B4]'+^j
for(int cur=l;cur<=r;cur++){ d6tv4Cf
if(i1==mid+1) oc,I,v
data[cur]=temp[i2++]; sHBTB6)lx
else if(i2>r) &\6},JN
data[cur]=temp[i1++]; 3^wHL:u
else if(temp[i1] data[cur]=temp[i1++]; ER9{D$
else MCibYvc[
data[cur]=temp[i2++]; *\'t$se+
} #|je m
} UJqh~s
m0^ "fMV
} fNAW4I I}
$k&v juB.
改进后的归并排序: ["&{^
!`Kg&t [&V
package org.rut.util.algorithm.support; %"(HjanH
l+2NA4s
import org.rut.util.algorithm.SortUtil; \`~YW<D
|z3!3?%R
/** Vv(buG
* @author treeroot :X}SuM?c
* @since 2006-2-2 /hqn>t
* @version 1.0 Fl($0}ER
*/ %.`u2'^
public class ImprovedMergeSort implements SortUtil.Sort { +jF|8
@:CM<+
private static final int THRESHOLD = 10; ly34aD/p~,
1o\2\B=k{
/* z6J12tu
* (non-Javadoc) rz&V.,s
* 4t =Kt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XYP RMa?
*/ ^GM3nx$
public void sort(int[] data) { 55.2UN
int[] temp=new int[data.length]; YC 4c-M
mergeSort(data,temp,0,data.length-1); ?K pDEH~\
} 7Dssr [
tgCp2`n
private void mergeSort(int[] data, int[] temp, int l, int r) { jEQ_#KKYJ
int i, j, k; \;'#8
int mid = (l + r) / 2; %fS1gSfh
if (l == r) qh6b;ae\x
return; "2C}Pr,p8
if ((mid - l) >= THRESHOLD) w)S 4Xi=
mergeSort(data, temp, l, mid); .{ILeG
else gh[q*%#
insertSort(data, l, mid - l + 1); rz|Sjtq
if ((r - mid) > THRESHOLD) ;sYDs71y
mergeSort(data, temp, mid + 1, r); um$U3'0e
else GjW(&p$&
insertSort(data, mid + 1, r - mid); g&p(XuN
C[znUI>
for (i = l; i <= mid; i++) { mB0`>?#i
temp = data; UGM:'xa<T
} j8e=],sQ
for (j = 1; j <= r - mid; j++) { j^b&Q
temp[r - j + 1] = data[j + mid]; 1r.2bL*~jw
} dbEXlm
int a = temp[l]; AX+]Z$
int b = temp[r]; 2Q(ZW@0
for (i = l, j = r, k = l; k <= r; k++) { |wb_im
if (a < b) { YG*<jKcX
data[k] = temp[i++]; %jj-\Gz!
a = temp; Yy/,I]F
} else { aDz% %%:r
data[k] = temp[j--]; ?$A)lWk(
b = temp[j]; 9({ 9r[U
} D8w.r"ne
} =HMCNl
} 7mi=Xa:U
|]q{qsy
/** 1=+S'_j
* @param data A6_ER&9$>N
* @param l ~IO'"h'w
* @param i dQH8s
*/ NA@Z$Gy
private void insertSort(int[] data, int start, int len) { QrSO%Rm1*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K\ pZ
} 2|exY>`w
} .u7grC C
} 2HE<WI^#h
} K-*ZS8
$@{d\@U
堆排序： =Ldf#8J
mrsN@(X0
package org.rut.util.algorithm.support; DD7D&@As
Yqu/_6wLx
import org.rut.util.algorithm.SortUtil; P%[{ 'u
56C'<#
/** {Ho_U&<
* @author treeroot 3M[d6@a
* @since 2006-2-2 Q-s5-&h(
* @version 1.0 hQzT =0
*/ b4KNIP7E
public class HeapSort implements SortUtil.Sort{ *6_>/!ywI
W>x.*K
/* (non-Javadoc) vsA/iH.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ed/ "OgA
*/ _iqaKYT$
public void sort(int[] data) { -DZ5nx
MaxHeap h=new MaxHeap(); i-95>ff
h.init(data); SZxnYVY
for(int i=0;i h.remove(); [8DPZU@
System.arraycopy(h.queue,1,data,0,data.length); |a0@4 :
} _!vuDv%
0'5N[Bvp
private static class MaxHeap{ |9m*?7
Fkqw#s(T
void init(int[] data){ #;P-*P
this.queue=new int[data.length+1]; =ZV+*cCC=q
for(int i=0;i queue[++size]=data; \H PB{ ;
fixUp(size); L[+4/a!HQ
} @9]TjZd
} 8RZqoQDH
KpQ@cc
private int size=0; EUPc+D3
1NN#-U
private int[] queue; 8js1m55KT
L1SZutWD?
public int get() { 0o@eE3^
return queue[1]; /dR:\ffz2
} 9~r8$,e
QcdAg%"yy
public void remove() { *u>[
SortUtil.swap(queue,1,size--); '_n$xfH
fixDown(1); ~f8:sDJ
} 6I5LZ^/G9
file://fixdown 2;SiH]HNS
private void fixDown(int k) { &x[V<Gq
int j; .k5&C/jv
while ((j = k << 1) <= size) { v?q)E%5j
if (j < size %26amp;%26amp; queue[j] j++; CY@#_z
if (queue[k]>queue[j]) file://不用交换 l8DZ2cw]
break; Q"GZh.m
SortUtil.swap(queue,j,k); <q4<3A
k = j; u-wj\BU
} Pfg.'Bl
} RDu{U(!
private void fixUp(int k) { l4E0/F
while (k > 1) { s";9G^:
int j = k >> 1; io$fL_R=
if (queue[j]>queue[k]) w"h3e
break; `Y<FR
SortUtil.swap(queue,j,k); t "[2^2G
k = j; cs Gd}2VE
} HUGhz
} E*UE?4FSw|
;c#jO:A5
} jH2_Ekgc;_
:T/I%|;f
} |#O>DdKHT
yT C+5_7
SortUtil： Wtj*Z.=:
{60U6n
package org.rut.util.algorithm; AKUmh
m+dJ3
import org.rut.util.algorithm.support.BubbleSort; ks(BS k4
import org.rut.util.algorithm.support.HeapSort; 6tBe,'*
import org.rut.util.algorithm.support.ImprovedMergeSort; n4Q ^
import org.rut.util.algorithm.support.ImprovedQuickSort; ~:"//%M3l
import org.rut.util.algorithm.support.InsertSort; ;Z-%'5hKM
import org.rut.util.algorithm.support.MergeSort; $xq$
import org.rut.util.algorithm.support.QuickSort; %2`.*]L
import org.rut.util.algorithm.support.SelectionSort; P^m&oH5]EG
import org.rut.util.algorithm.support.ShellSort; :Mnl1;oh
e6I7N?j
/** 9 EV.![
* @author treeroot ]R]%c*tA
* @since 2006-2-2 a/lTQj]A
* @version 1.0 )s>R~7
*/ 7) Qq
public class SortUtil { yey]#M[y
public final static int INSERT = 1; ")eY{C
public final static int BUBBLE = 2; }9 I,p$
public final static int SELECTION = 3; *w23(f
public final static int SHELL = 4; =]W[{@P
public final static int QUICK = 5; 9 kLA57
public final static int IMPROVED_QUICK = 6; yuq2)
public final static int MERGE = 7; fnJt8Y4
public final static int IMPROVED_MERGE = 8; &O^t]7
public final static int HEAP = 9; ^_G@a,
{Z^q?~zC[
public static void sort(int[] data) { #9p|aS\
sort(data, IMPROVED_QUICK); VqnM>||
} S0!w]Ku
private static String[] name={ >|g(/@IO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "{M?,jP#
}; 5O"$'iL
Oc%W_Gb7
private static Sort[] impl=new Sort[]{ -s9()K(vZG
new InsertSort(), ^D A<=C-[!
new BubbleSort(), QEc4l[^{.B
new SelectionSort(), J)P7QTC
new ShellSort(), 28LYGrB
new QuickSort(), Gm-V/[29R
new ImprovedQuickSort(), cSYMnB
new MergeSort(), 5odXT *n
new ImprovedMergeSort(), 9G^gI}bY
new HeapSort() <,,X\>B
}; eR:C?v
c[a^fu!
public static String toString(int algorithm){ k[{ ~eN:
return name[algorithm-1]; R0YWe
} ayQ2#9X}
V{n7KhN~Y!
public static void sort(int[] data, int algorithm) { zQaD&2 q
impl[algorithm-1].sort(data); Q+ZZwqyxD
} 7R$O~R3p
Tb}op XYK
public static interface Sort { Q2<v: *L
public void sort(int[] data); 40}7O<9*
} 2ae"Sd!-2
nB6 $*'
public static void swap(int[] data, int i, int j) { hRZYvZ3
int temp = data; ]EqwDw4
data = data[j]; &1ZUMc
data[j] = temp; r*9*xZ>8u
} +`uNO<$~f
} kO4'|<