[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; xR_]^Get
} >E]*5jqU
int i1=l; g!~j Wn?A
int i2=mid+1; gKYn*
for(int cur=l;cur<=r;cur++){ o8s&n3mY}y
if(i1==mid+1) `4k;`a
data[cur]=temp[i2++]; A:D\!5=
else if(i2>r) V?_%Y<|L
data[cur]=temp[i1++]; LL[+QcH
else if(temp[i1] data[cur]=temp[i1++]; G!rcY5!J
else 3\4Cg()
data[cur]=temp[i2++]; c'G\AbUVjE
} +vU.#C_2
} -g@pJ^>:
hA@X;Mh^w
} W/\7m\B
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改进后的归并排序: dHp6G^Y
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package org.rut.util.algorithm.support; Xrz0ch
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import org.rut.util.algorithm.SortUtil; Q'8v!/"}p{
l w%fY{
/** kkJg/:g
* @author treeroot y.O? c&!
* @since 2006-2-2 r p@=
* @version 1.0 IcQ?^9%{
*/ Z(<ul<?r
public class ImprovedMergeSort implements SortUtil.Sort { piId5Gx7
D>|:f-Z6Z
private static final int THRESHOLD = 10; AGv;8'`
.s!:p pwl
/* PN'8"8`{
* (non-Javadoc) NGze: gPmO
* <!+o8z]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,88Y1|:X
*/ 4;*V^\',9
public void sort(int[] data) { mD=?C
int[] temp=new int[data.length]; `3+U6>U [
mergeSort(data,temp,0,data.length-1); ^M80 F7
} kqyMrZ#
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private void mergeSort(int[] data, int[] temp, int l, int r) { ScTqnY$v
int i, j, k; 'sA&Pm
int mid = (l + r) / 2; djSN{>S
if (l == r) /tUl(Fp J`
return; 4/h2_
if ((mid - l) >= THRESHOLD) Gt1Up~\s
mergeSort(data, temp, l, mid); t]` 2f3UO
else q@\_q!
insertSort(data, l, mid - l + 1); sbs"26IE
if ((r - mid) > THRESHOLD) xv*mK1e
mergeSort(data, temp, mid + 1, r); #>,cc?H-
else 1z`,*eD7
insertSort(data, mid + 1, r - mid); }UO,R~q~
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for (i = l; i <= mid; i++) { <N*>9S,}
temp = data; asF-mf;D
} <G&v
for (j = 1; j <= r - mid; j++) { _4W#6!
temp[r - j + 1] = data[j + mid]; srSTQ\l4
} x:bYd\ EJ[
int a = temp[l]; <VBw1|)$@
int b = temp[r]; :1{j&$
for (i = l, j = r, k = l; k <= r; k++) { "/"qg
if (a < b) { ;CvGIp&y
data[k] = temp[i++]; ~H$XSNPi
a = temp; p']AXJ`Z
} else { =aekY;/
data[k] = temp[j--]; [_0g^(`
b = temp[j]; j~{2fd<>
} i f"v4PHq
} a2 SQ:d
} Stc\P]%d
- VE#:&
/** MCCZh{uo
* @param data ku{aOV%
* @param l <-?B#
* @param i *Q>:|F[vM
*/ "5YdmBy
private void insertSort(int[] data, int start, int len) { LBE".+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 35>}$1?-6
} |. 6@-h~8
} f@{C3E dd
} IF:M_
} saT9%?4-
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堆排序： yRznP)
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package org.rut.util.algorithm.support; w|HZI,~
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import org.rut.util.algorithm.SortUtil; w=`z!x![/
O)Qz$
/** @( t:E`8
* @author treeroot z(WpOD
* @since 2006-2-2 e?YbG.(E9
* @version 1.0 "uCQm '
*/ lkm(3y@']A
public class HeapSort implements SortUtil.Sort{ A!D:Kc3
.}E)7"Qi,
/* (non-Javadoc) lP e$AI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z C93C7lJ
*/ cOb%SC[A{
public void sort(int[] data) { mQs$7t[>t
MaxHeap h=new MaxHeap(); [z~Nw#
h.init(data); K[[k,W]qb
for(int i=0;i h.remove(); !7oy%{L
System.arraycopy(h.queue,1,data,0,data.length); {X$Mwqhpp;
} SoX V
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private static class MaxHeap{ X W)A~wPBs
Ic}ofBK
void init(int[] data){ ~Hs{(7
this.queue=new int[data.length+1]; dO[4}FZ$
for(int i=0;i queue[++size]=data; gp)ds^
fixUp(size); `VsGa
} S:YL<_oI|
} H1nQ.P]_
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private int size=0; 0I((UA/7Zs
kKM%
private int[] queue; b..$5
Z-|C{1}A
public int get() { \DqxS=o;
return queue[1]; vI'>$
} ~-`02
CK(ev*@\D,
public void remove() { ?6d4T
SortUtil.swap(queue,1,size--); V+24-QWh
fixDown(1); QNXxpoS#
} }NCvaO
file://fixdown W~3tQ!
private void fixDown(int k) { K]8wW;N4
int j; l*Ei7 |Z
while ((j = k << 1) <= size) { <&:&qngg
if (j < size %26amp;%26amp; queue[j] j++; 8>q%1]X
if (queue[k]>queue[j]) file://不用交换 P@YL.'KU)
break; + nS/jW
SortUtil.swap(queue,j,k); fZ}Y(TG/
k = j; %>2t=)T
} ?MM3LA! <
} df*#?Ok
private void fixUp(int k) { .4>s2
while (k > 1) { &.hRVW(
int j = k >> 1; |"qB2.[
if (queue[j]>queue[k]) ~C'nBV
break; AJfi,rFPg
SortUtil.swap(queue,j,k); `uVW<z{l
k = j; ;6nZ
} b:Kw_Q
} bU]N^og^
X3{1DY3@u
} i8_x1=A
U!:!]DX(
} _M[[vXH
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SortUtil： q_y,j&
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package org.rut.util.algorithm; 8$ZSF92C
G*i#\
import org.rut.util.algorithm.support.BubbleSort; 5jV97x)BGx
import org.rut.util.algorithm.support.HeapSort; :IVMTdYf
import org.rut.util.algorithm.support.ImprovedMergeSort; }.UI&UZ-
import org.rut.util.algorithm.support.ImprovedQuickSort; h#>L:Wf5E
import org.rut.util.algorithm.support.InsertSort; i i@1!o
import org.rut.util.algorithm.support.MergeSort; ll\^9 4]Q
import org.rut.util.algorithm.support.QuickSort; gH^$Y~Lx
import org.rut.util.algorithm.support.SelectionSort; xeM':hD.o
import org.rut.util.algorithm.support.ShellSort; IXvz&4VD
|4.o$*0Y
/** gkML .u
* @author treeroot ](>7h_2B
* @since 2006-2-2 Xm:=jQn
* @version 1.0 5A$az03y$\
*/ $;uWj|
public class SortUtil { ;[%}Xx
public final static int INSERT = 1; }u_EXP8M
public final static int BUBBLE = 2; Pgw%SMEp
public final static int SELECTION = 3; RyOT[J
public final static int SHELL = 4; b2X'AHK S
public final static int QUICK = 5; P!+nZXo
public final static int IMPROVED_QUICK = 6; A?D"j7JD=L
public final static int MERGE = 7; 0tCOb9
public final static int IMPROVED_MERGE = 8; .(7C)P{.0
public final static int HEAP = 9; x56 F
%C`'>,t>
public static void sort(int[] data) { O {6gNR,*
sort(data, IMPROVED_QUICK); Eqmv`Z [_
} 'SU9NQS
private static String[] name={ 6!%d-Z7)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `x$}~rP&)!
}; 'CX.qxF1;p
n22hVw
private static Sort[] impl=new Sort[]{ xcZ%,7
new InsertSort(), M&djw`B
new BubbleSort(), NnLhJPh
new SelectionSort(), .aismc`=
new ShellSort(), y|;8:b32
new QuickSort(), ?FV7|)f
new ImprovedQuickSort(), dD^_^'i
new MergeSort(), j&[.2PW\
new ImprovedMergeSort(), u1)TG"+0
new HeapSort() cxD}t'T
}; Stw+Dm\!
ok3
public static String toString(int algorithm){ a|P~LMPM
return name[algorithm-1]; B2G5hbaA
} Z0"&
Naf`hE9
public static void sort(int[] data, int algorithm) { "T{~,'T
impl[algorithm-1].sort(data); d@6:|auO
} 9IvcKzS2
RZd4(7H=q
public static interface Sort { 7"n1it[RJ8
public void sort(int[] data); Lk`k>Nn)
} NT;x1
O~#uQm
public static void swap(int[] data, int i, int j) { >2lAy:B5
int temp = data; F8S~wW=\w
data = data[j]; ,dZ#,<
data[j] = temp; ^%oG8z,L
} LZQFj/,Jg
} +f\pk \Ith