[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'URPj:t
} b|i94y(
int i1=l; zOR
int i2=mid+1; QdM&M^
for(int cur=l;cur<=r;cur++){ pN+lC[C
if(i1==mid+1) /aepE~T
data[cur]=temp[i2++]; 90%alG1>y
else if(i2>r) )v!>U<eprD
data[cur]=temp[i1++]; D`=hP(y^
else if(temp[i1] data[cur]=temp[i1++]; ,+0>p
else 9JHu{r"M
data[cur]=temp[i2++]; qMAH~P0u
} ;c5Q"
} *KP 60T
?]S!-6:
} pKrol]cth8
b469
改进后的归并排序: K!q:A+]
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package org.rut.util.algorithm.support; H26'8e
lY5a=mwHU
import org.rut.util.algorithm.SortUtil; J4 yT|
v)(tB7&`=
/** >$]SYF29
* @author treeroot 4_3 DQx9s
* @since 2006-2-2 y0Pr[XZ
* @version 1.0 gB!K{ Io'
*/ m:77pE&o
public class ImprovedMergeSort implements SortUtil.Sort { @g*=xwve=~
h' OLj#H
private static final int THRESHOLD = 10; X0X!:gX
|BD]K0
/* X!0s__IOc
* (non-Javadoc) Gc) Zu`67
* djVE x}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M2ig iR
*/ i"uAT$xe
public void sort(int[] data) { ;mV,r,\dH
int[] temp=new int[data.length]; W`fE@*k0
mergeSort(data,temp,0,data.length-1); CB5 ~!nKv&
} K (yuL[p`
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private void mergeSort(int[] data, int[] temp, int l, int r) { YShtoaCx>
int i, j, k; ?@ ei_<A{
int mid = (l + r) / 2; H4'xxsx
if (l == r) iP1u u
return; Ws[[Me,=
if ((mid - l) >= THRESHOLD) ]p(jL7
mergeSort(data, temp, l, mid); jV^Dj
else %?lPS
insertSort(data, l, mid - l + 1); Hh=D:kE
if ((r - mid) > THRESHOLD) QE7 r{
mergeSort(data, temp, mid + 1, r); >= Hcw
else 36D-J)-Z
insertSort(data, mid + 1, r - mid); ^a@Vn\V1
X*Mw0;+T
for (i = l; i <= mid; i++) { v>TI.;{y
temp = data; }}v04~
} FAAqdK0
for (j = 1; j <= r - mid; j++) { ~y{(&7sM
temp[r - j + 1] = data[j + mid]; CUOxx,V
} [o)P
int a = temp[l]; J;Az0[qMR
int b = temp[r]; #2c-@),
for (i = l, j = r, k = l; k <= r; k++) { 5-|fp(Ww_W
if (a < b) { Qci<cVgP
data[k] = temp[i++]; h3.wR]ut
a = temp; pmAir:
} else { 5fS89?/?
data[k] = temp[j--]; xUE9%qO
b = temp[j]; AF5.gk=
} /+G&N{)k
} Au'[|Prr
} Sk@~}
Fl GKy9k
/** vkan+~H
* @param data ='=\!md
* @param l 2~+Iu+
* @param i ?6@Y"5 z3g
*/ e[}R1/!L
private void insertSort(int[] data, int start, int len) { ,R$n I*mf_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F|X-|Co
} }5^j08
} j'i-XIs
} sbOa] 5]
} T"-HBwl
@W|}|V5
堆排序： HUurDgRi]
@Nb&f<+gi
package org.rut.util.algorithm.support; { hUbK+dKZ
OL*EY:]
import org.rut.util.algorithm.SortUtil; fRJSo%
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/** KLlo^1.<
* @author treeroot _$"qC[.
* @since 2006-2-2 8%Zl;;W
* @version 1.0 pDD0 QO
*/ [vpZ3;
public class HeapSort implements SortUtil.Sort{ @AL,@P/9=
<#ujm fD
/* (non-Javadoc) XiI@Px?FL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pLL ^R
*/ Dq+rEt
public void sort(int[] data) { 67 >*AL
MaxHeap h=new MaxHeap(); L's_lC
h.init(data); C^RO@kM
for(int i=0;i h.remove(); $(_Xt-6
System.arraycopy(h.queue,1,data,0,data.length); BuI&kU,WY
} rWF~aec
>L?)f3_a
private static class MaxHeap{ :h1itn
E,5jY
void init(int[] data){ X""<5s'0
this.queue=new int[data.length+1]; /kyuL]6
for(int i=0;i queue[++size]=data; *iS<]y
fixUp(size); G}mJtXT#=
} +r9:n(VP
} p_=^E*J]
ptGM'
private int size=0; ;7&RmIXKh'
~^=QBwDW8N
private int[] queue; 4`)B@<
XbYW,a@w2
public int get() { gPY2Bnw;l
return queue[1]; D52ELr7
} <T:u&Ic
OUn,URI
public void remove() { R@t?!`f!+
SortUtil.swap(queue,1,size--); UO8#8
fixDown(1); Z2`(UbG}
} e4Ol:V
file://fixdown u*Eb4
private void fixDown(int k) { /r Zj=
int j; "YHqls}c
while ((j = k << 1) <= size) { 31k.{dnm
if (j < size %26amp;%26amp; queue[j] j++; C/ow{MxA
if (queue[k]>queue[j]) file://不用交换 %v:9_nwO)
break; |"DQ^)3Pi
SortUtil.swap(queue,j,k); Q u2W
k = j; QNzI
} =dUeQ?>t=
} Ix !O&_6s
private void fixUp(int k) { u\-xlp?"o
while (k > 1) { $Ne$s
int j = k >> 1; )(b]- )
if (queue[j]>queue[k]) (F~i
break; FSd842O
SortUtil.swap(queue,j,k); YmFJlMK
k = j; >Rs:Fw|jro
} Z ) qc-~S
} >V@-tT"^:
XJDp%B
} [Hy0j*
u!?.vx<qy
} 5E?{>1
,*8}TIS(s
SortUtil： yb56nd
M?x/C2|
package org.rut.util.algorithm; |2AK~t|t
jTaEaX8+
import org.rut.util.algorithm.support.BubbleSort; i}N'WV`!
import org.rut.util.algorithm.support.HeapSort; ` *x;&.&v
import org.rut.util.algorithm.support.ImprovedMergeSort; I/rq@27o
import org.rut.util.algorithm.support.ImprovedQuickSort; *Ibl+
import org.rut.util.algorithm.support.InsertSort; $0V<wsVM
import org.rut.util.algorithm.support.MergeSort; O8TAc]B
import org.rut.util.algorithm.support.QuickSort; =K~<& l8
import org.rut.util.algorithm.support.SelectionSort; BZ<Q.:)
import org.rut.util.algorithm.support.ShellSort; 4]u53`
NMM0'tY~
/** w0x,~
* @author treeroot ?V"X=B2
* @since 2006-2-2 <H`&Zqqk
* @version 1.0 xq-R5(k
*/ 1om:SHw
public class SortUtil { +'Pf|S
public final static int INSERT = 1; XLz>h(w=
public final static int BUBBLE = 2; ihBlP\C
public final static int SELECTION = 3; i&$L$zf,
public final static int SHELL = 4; h)7{Cj
public final static int QUICK = 5; ;'NB6[x
public final static int IMPROVED_QUICK = 6; %fnL
public final static int MERGE = 7; 6%~ Z^>`N
public final static int IMPROVED_MERGE = 8; (eS4$$g
public final static int HEAP = 9; v1<3y~'f
M%5qx,JQY
public static void sort(int[] data) { LJ`*&J
sort(data, IMPROVED_QUICK); R2yiExw<
} u;H SX
private static String[] name={ CWdA8)n.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %WiDz0o
}; 5Jh=${
<XiHQ B!
private static Sort[] impl=new Sort[]{ e82SG8#]
new InsertSort(), Z0s}65BR
new BubbleSort(), YvL5>;
new SelectionSort(), wP8Wx~Q=
new ShellSort(), 4\a KC%5
new QuickSort(), vmm#UjwF3
new ImprovedQuickSort(), BZP}0
new MergeSort(), ;D&FZ|`(u
new ImprovedMergeSort(), [Nbs{f^J=
new HeapSort() vx62u29m
}; *cz nokq6
+KgLe>-}
public static String toString(int algorithm){ k#NIY4%.
return name[algorithm-1]; @{3$H^
} 0eUK'
=v]\{.
public static void sort(int[] data, int algorithm) { Z5/^pyc
impl[algorithm-1].sort(data); <]xGd!x$
} _>+!&_h
}m0*w3
public static interface Sort { =~6A c}$
public void sort(int[] data); {fFZ%$
} s(jixAf
S#_g/3w
public static void swap(int[] data, int i, int j) { ;NQ9A &$)
int temp = data; 9z6-HZG'~<
data = data[j]; u:JD
data[j] = temp; P|HxD0c^u
} e=&,jg?K
} "7}bU_":s