[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; 9>=;FY
} 9"N~yKa`"K
int i1=l; B~'vCuE
int i2=mid+1; Q3XpHnufu+
for(int cur=l;cur<=r;cur++){ 1rNzJ;'
if(i1==mid+1) =T3<gGM
data[cur]=temp[i2++]; |.(dq^
else if(i2>r) ]Oe2JfJwx
data[cur]=temp[i1++]; r7RIRg_
else if(temp[i1] data[cur]=temp[i1++]; R8Wr^s>'
else 0%32=k7O[
data[cur]=temp[i2++]; /,BD#|
} zUt'QH7E.
} EB0TTJR?#
]RZ|u*l=x
} &9.Cl;I
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改进后的归并排序: ,cXD.y
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package org.rut.util.algorithm.support; a]$1D!Anc
2+RUTOv/d
import org.rut.util.algorithm.SortUtil; VRVO-Sk
M f}~{+
/** c_dVWh e
* @author treeroot zKyyU}LHH
* @since 2006-2-2 b10cuy|a/X
* @version 1.0 tl[Uw[
*/ P:hBt\5B
public class ImprovedMergeSort implements SortUtil.Sort { 4`lLf
CLxynZ\;
private static final int THRESHOLD = 10; Bm:98? [
3RigzT3
/* 59 h]UX=
* (non-Javadoc) Ka'=o?'B5
* '<gI8W</
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xI{)6t$`
*/ *zaQx+L
public void sort(int[] data) { p99]
int[] temp=new int[data.length]; $CRm3#+ ~
mergeSort(data,temp,0,data.length-1); <KJ/<0l
} el&0}`K
bc7/V#W
private void mergeSort(int[] data, int[] temp, int l, int r) { rbul8(1h
int i, j, k; Z@yW bjE7Z
int mid = (l + r) / 2; 3>3Kwc~E
if (l == r) D+#E-8
return; *-#&K\
if ((mid - l) >= THRESHOLD) Ij 79~pn
mergeSort(data, temp, l, mid); rExnxQ<e
else -fM1nH&
insertSort(data, l, mid - l + 1); 2\R'@L*
if ((r - mid) > THRESHOLD) _1!7V3|^
mergeSort(data, temp, mid + 1, r); xn?a. 3b'
else m1j*mtu
insertSort(data, mid + 1, r - mid); gx-2v|pZ
@hl.lq
for (i = l; i <= mid; i++) { 5v[*:0p'
temp = data; ajve~8/&
} :)8VdWg
for (j = 1; j <= r - mid; j++) { _aq8@E~
temp[r - j + 1] = data[j + mid]; t;){D:]k
} ]v?@g:iE
int a = temp[l]; #./fY;:cj
int b = temp[r]; -Sqz5lo
for (i = l, j = r, k = l; k <= r; k++) { Ah1]Y}sy
if (a < b) { M "ui0 ac
data[k] = temp[i++]; hz{`h
a = temp; BfXgh'Z~
} else { K> %Tq
data[k] = temp[j--]; [m->5H
b = temp[j]; SDL7<ZaE
} Eu0akqZ
} We)xB
} )Fc%+TpKi
HUcq%.
/** 6 [k\@&V-
* @param data Jf@H/luW
* @param l HsxVZ.dS
* @param i GmK^}=frj
*/ +|*IZ:w)
private void insertSort(int[] data, int start, int len) { <:_wbVn-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0`Kj25
} )z>|4@,
} Qo>b*Ku;
} @<,X0S
} .28<tEf
YP 6`L
堆排序： -<6\1J
} j<)L,
package org.rut.util.algorithm.support; ~cWAl,(B<F
%Celc#v
import org.rut.util.algorithm.SortUtil; Ii6<b6-
AWcLUe{
/** 5sdn[Tt##
* @author treeroot 4"GR] X
* @since 2006-2-2 '|ad_M
* @version 1.0 y~(h>gi,x
*/ .nTwPrG
public class HeapSort implements SortUtil.Sort{ \-L&5x"x
u^&A W$
/* (non-Javadoc) JR'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q~ tz? T_
*/ 88Ey12$
public void sort(int[] data) { 6e(Qwt
MaxHeap h=new MaxHeap(); 0*VWzH
h.init(data); q$p%ZefZ
for(int i=0;i h.remove(); ) g0%{dfJ
System.arraycopy(h.queue,1,data,0,data.length); Y$o<6[7
} z__EYh
4Xgg%@C
private static class MaxHeap{ zofa-7'Bn
toLV4BtIG
void init(int[] data){ #||}R[~P"
this.queue=new int[data.length+1]; :1^LsLr5
for(int i=0;i queue[++size]=data; Fiv3 {.
fixUp(size); ,ZaRy$?
} {SOr#{1z*
} X1,I
GC<l#3+
private int size=0; XND|h#i8
B`YTl~4
private int[] queue; ^/)^7\@
d^@dzNv
public int get() { I?]ohG K
return queue[1]; <qtr
} Wfu(*
'>NCMB{*
public void remove() { 7jxslI&F
SortUtil.swap(queue,1,size--); ?:pP8/y
fixDown(1); 0\H\lKcK
} |<HPn4 ,X
file://fixdown wYdb*"R
private void fixDown(int k) { QFE:tBHe
int j; 6O|@xvg
while ((j = k << 1) <= size) { oOnop-z7
if (j < size %26amp;%26amp; queue[j] j++; .RE:;<|w
if (queue[k]>queue[j]) file://不用交换 kd>hhiz|
break; j1^I+j)
SortUtil.swap(queue,j,k); 1!ii;s^e
k = j; R"4Vtww
} 1=r#d-\tR
} 4Fa~Aog
private void fixUp(int k) { "C}b%aO:
while (k > 1) { v;BV@E0}x
int j = k >> 1; Ld\R:{M"
if (queue[j]>queue[k]) aL*&r~`&e'
break; Mh~q//
SortUtil.swap(queue,j,k); Olt`:;j-
k = j; ) dn(G@5
} T m,b,hi$
} bhID#&
.O74V~T
} pqk?|BvpK_
H0:E(}@
} gGvz(R:y
c*(bO3 b
SortUtil： J\/cCW-rF
w&X<5'GM
package org.rut.util.algorithm; ccB&O _
pSoiH<33
import org.rut.util.algorithm.support.BubbleSort; "&%I)e^
import org.rut.util.algorithm.support.HeapSort; 0+iu(VbF
import org.rut.util.algorithm.support.ImprovedMergeSort; Y}x>t* I
import org.rut.util.algorithm.support.ImprovedQuickSort; 4^:\0UF
import org.rut.util.algorithm.support.InsertSort; 4Z1ST;
import org.rut.util.algorithm.support.MergeSort; ?@BTGUK"C
import org.rut.util.algorithm.support.QuickSort; .Fs7z7?Y
import org.rut.util.algorithm.support.SelectionSort; 2n3W=dF
import org.rut.util.algorithm.support.ShellSort; 5*E]ETo@R
O#b6mKPt;t
/** O|\J}rm'
* @author treeroot c$ao:nP)D
* @since 2006-2-2 dUsYZdQs
* @version 1.0 U(a#@K!H
*/ .+qQYDEw
public class SortUtil { Fa?~0H/DL
public final static int INSERT = 1; RwKdxK+;
public final static int BUBBLE = 2; vo`2\R.
public final static int SELECTION = 3; 05z,b]>l
public final static int SHELL = 4; kr+D,h01
public final static int QUICK = 5; 6tB+JF
public final static int IMPROVED_QUICK = 6; E;,u2[3
public final static int MERGE = 7; $g/SWq
public final static int IMPROVED_MERGE = 8; .}&`TU
public final static int HEAP = 9; 0Z~p%C<LW
Z?}dq-Vh&
public static void sort(int[] data) { 'w!Cn>
sort(data, IMPROVED_QUICK); 8?J&`e/
} ZU85P0
private static String[] name={ JX-' mV`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R?68*} `7
}; j!_;1++q
H#NCi~M>3
private static Sort[] impl=new Sort[]{ %4ePc-
new InsertSort(), @AGn{q
new BubbleSort(), X59:C3c
new SelectionSort(), 0":ib0=
new ShellSort(), T29Dt
new QuickSort(), YX=a#%vrl
new ImprovedQuickSort(), kv3E4,<9
new MergeSort(), ,ek_R)&[o
new ImprovedMergeSort(), #i@;J]x(
new HeapSort() ^c<ucv6.
}; wLmhy,
]4~lYuI4
public static String toString(int algorithm){ K#EvFs`s;
return name[algorithm-1]; p!>oo1&
} vtw6FX_B
=G]1LTI
public static void sort(int[] data, int algorithm) { qC}-_u7s
impl[algorithm-1].sort(data); DBPRGQ
} y<HO:kZ8`
W{%TlN
public static interface Sort { {)"iiJ
public void sort(int[] data); '>&^zgr
} } ~h3c|
UF?H>Y&
public static void swap(int[] data, int i, int j) { iTFdN}U
int temp = data; )0ea+ib
data = data[j]; (5#nrF]
data[j] = temp; eCN })An
} =+ytTQc*ot
} f47Od-\-