[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; -1Lh="US
} 8 fVI33
int i1=l; ~ I]kY%
int i2=mid+1; M< *5Y43
for(int cur=l;cur<=r;cur++){ |ZJ]`qmZ
if(i1==mid+1) &~6Z)}
data[cur]=temp[i2++]; i'L7t!f}o
else if(i2>r) 8niQG']
data[cur]=temp[i1++]; fH`P8?](x
else if(temp[i1] data[cur]=temp[i1++]; bo$xonV@y
else <&8cq@<
data[cur]=temp[i2++]; A*n'"+_
} ! D'U:)
} W+H27qsv
AXH4jQw
} O2:m)@
A>%fE 6FY
改进后的归并排序: JR$Dp&]I
k^C;"awh
package org.rut.util.algorithm.support; &Km?(%?
lR{eO~'~V
import org.rut.util.algorithm.SortUtil; Zr;.`(>
S@Yb)">ZQ
/** W7l/{a @
* @author treeroot YXg:cXE8e
* @since 2006-2-2 >LgV[D#=&o
* @version 1.0 rP2^D[uM.
*/ "2'nLQ""q
public class ImprovedMergeSort implements SortUtil.Sort { 2(5wFc
gEO#-tMjOQ
private static final int THRESHOLD = 10; [9z<*@$-
mf,mKgfG
/* zXbTpm
* (non-Javadoc) w{F8]N>0<
* ZA1?'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {Ylj]
*/ !b rN)b)f
public void sort(int[] data) { (4$lB{%
int[] temp=new int[data.length]; P;MS%32
mergeSort(data,temp,0,data.length-1); 6DaH+
} H3QAIsGS
fT[6Cw5w`
private void mergeSort(int[] data, int[] temp, int l, int r) { M4nM%qRGQ
int i, j, k; +z>*m`}F
int mid = (l + r) / 2; {KeHqM}e
if (l == r) 0Ny0#;P
return; H#m)`=nZSZ
if ((mid - l) >= THRESHOLD) >kz5azV0
mergeSort(data, temp, l, mid); Toy~\
else 9{70l539
insertSort(data, l, mid - l + 1); -66|Y
if ((r - mid) > THRESHOLD) @r+ErFI
mergeSort(data, temp, mid + 1, r); .{5)$w>
else $w[@L7'(
insertSort(data, mid + 1, r - mid); tI*u"%#t
TkWS-=lNH0
for (i = l; i <= mid; i++) { A{x&5yX8
temp = data; *vJ1~SRV
} 0Hff/~J
for (j = 1; j <= r - mid; j++) { ?Sn$AS I
temp[r - j + 1] = data[j + mid]; 9.zy`}
} P:(,l,}F8
int a = temp[l]; JF: QQ\
int b = temp[r]; R!*UU'se
for (i = l, j = r, k = l; k <= r; k++) { `q7I;w+g
if (a < b) { aNn< NW
data[k] = temp[i++]; UQ'D-eK
a = temp; 2?QIK3"v
} else { Bwb3@vNA
data[k] = temp[j--]; .g(yTA
b = temp[j]; F=iz\O!6
} T6OIb
} hAG++<H{
} 0u'2f`p*
{* >$aI
/** +wD--24!(
* @param data 1kb?y4xeJ
* @param l b'Mg
* @param i 5SR29Z[
*/ n$5,B*
private void insertSort(int[] data, int start, int len) { +Y)rv6}m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z(/jQ=ozQ
} >W.Pg`'D
} e_k1pox]l
} ^:{l~~9iKp
} u;!CQ w/
O:xRUjpL
堆排序： `U2Z(9le
uO,90g[C/R
package org.rut.util.algorithm.support; hJhdHy=U
Iimz
import org.rut.util.algorithm.SortUtil; `@?l{
6dC!&leNi
/** 9WtTUk
* @author treeroot !?O:%QG
* @since 2006-2-2 "LP4)hr_`
* @version 1.0 {Swou>X4
*/ A-ir
public class HeapSort implements SortUtil.Sort{ =ZzhH};aX
,dzbI{@6
/* (non-Javadoc) <MT_zET
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y'2K7\>E
*/ f[%\LHq
public void sort(int[] data) { lNqXx{!k
MaxHeap h=new MaxHeap(); zHDC8m
h.init(data); @_1$ <8
for(int i=0;i h.remove(); ^a<=@0|
System.arraycopy(h.queue,1,data,0,data.length); \Qu~iB(Y
} ,o*b-Cv/
>hB]T%'
private static class MaxHeap{ VaVKWJg$
@8n0GCv
void init(int[] data){ j(/"}d3osm
this.queue=new int[data.length+1]; HmbTV(lC
for(int i=0;i queue[++size]=data; 6$fC R
fixUp(size); U NQup;#h
} g@B9i=
} () b0Sh=
N4)&K[
private int size=0; (:Bo'q S
vQu) uml
private int[] queue; .7~Kfm@2
(t<i?>p
public int get() { J +<|8D
return queue[1]; 8ru@ 8|r
} 4sNM#]%|
,_\h)R_
public void remove() { c7wza/r>
SortUtil.swap(queue,1,size--); 97F$$d54T
fixDown(1); OK3B6T5w=
} Axj<e!{D
file://fixdown ^4 es
private void fixDown(int k) { ^C<dr}8
int j; 47$JN}qI0
while ((j = k << 1) <= size) { O!Mm~@MoA
if (j < size %26amp;%26amp; queue[j] j++; .u W_(Rqg
if (queue[k]>queue[j]) file://不用交换 9FPl
break; ZPZ1 7-
SortUtil.swap(queue,j,k); 1D=My1B
k = j; (:-DuUt
} t MA
} *zz/U (9D
private void fixUp(int k) { ',juZ[]_{
while (k > 1) { BN#^ /a-
int j = k >> 1; d=lZhqY
if (queue[j]>queue[k]) f4@Dn >BJ
break; #cjB <APY
SortUtil.swap(queue,j,k); @H7dQ,%
k = j; JhB{aW>
} sI*( MhU
} :*}tkr4&eh
e5veq!*C?
} Ge(r6"%7
z^Oiwzo
} 3b%y+?-{\u
x6:$lZ(
SortUtil： i}+dctg/
v[F_r
package org.rut.util.algorithm; Y;-"Z
#-e3m/>
import org.rut.util.algorithm.support.BubbleSort; Dk]Y\:
import org.rut.util.algorithm.support.HeapSort; 63:ZDQ
import org.rut.util.algorithm.support.ImprovedMergeSort; }=XL^a|V
import org.rut.util.algorithm.support.ImprovedQuickSort; &w/aQs~
import org.rut.util.algorithm.support.InsertSort; #n~/~*:i92
import org.rut.util.algorithm.support.MergeSort; d*q_DV
import org.rut.util.algorithm.support.QuickSort; xA&G91|s
import org.rut.util.algorithm.support.SelectionSort; Z~$&h
import org.rut.util.algorithm.support.ShellSort; .>CqZN,^
V4VTP]'n
/** (CuaBHR
* @author treeroot Vfc9+T+
* @since 2006-2-2 W-Hw%bwN/q
* @version 1.0 S1`+r0Fk~n
*/ o^DiIoor
public class SortUtil { eDTEy;^o
public final static int INSERT = 1; FA4bv9:hi
public final static int BUBBLE = 2; "%>/rh2Iq
public final static int SELECTION = 3; p1X lni%=
public final static int SHELL = 4; L$(W* PG}
public final static int QUICK = 5; E\RQm}Z09
public final static int IMPROVED_QUICK = 6; M%9PVePOe
public final static int MERGE = 7; C7qbofoV
public final static int IMPROVED_MERGE = 8; zFQxW4G
public final static int HEAP = 9; wPqIy}-
q;B-np?U
public static void sort(int[] data) { tQ=U22&7
sort(data, IMPROVED_QUICK); m"+9[d_u
} $:mCyP<y
private static String[] name={ ^dqyX(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _CI!7%
}; 'lIT7MK
Kr]F+erJe
private static Sort[] impl=new Sort[]{ 7b'XQ/rs
new InsertSort(), ]u2!)vZh'
new BubbleSort(), ] J:^$]
new SelectionSort(), t3U*rr|A
new ShellSort(), DZLSn Ax
new QuickSort(), qIO)Z
new ImprovedQuickSort(), oN)K2&M0
new MergeSort(), P8;|>OLZ)
new ImprovedMergeSort(), >cSc
new HeapSort() i:{a-Bd
}; p^~lQ8t
&?YQVwsN
public static String toString(int algorithm){ 0XXu_f@]9
return name[algorithm-1]; pw&l.t6.
} Hyq|%\A
M^+~r,D1u
public static void sort(int[] data, int algorithm) { 4MIL#1s
impl[algorithm-1].sort(data); JH<q7Y6!y
} E!3W_:Bs
BnAia3z
public static interface Sort { =%$ _)=}J
public void sort(int[] data); j:]/AReOL
} VA2%2g2n{
e2/&X;2
public static void swap(int[] data, int i, int j) { oOQnV(I
int temp = data; #sNa}292"
data = data[j]; hDVD@b
data[j] = temp; ~Bj-n6QDE
} ,:;nq>;
} !|Vjv}UO