[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; M*H< n*
} %|jzEBz@
int i1=l; /=trj5h
int i2=mid+1; hBoP=X.~
for(int cur=l;cur<=r;cur++){ 1$OVe4H1
if(i1==mid+1) 1C'P)f28
data[cur]=temp[i2++]; Wo2v5-
else if(i2>r) WQ.i$ID/
data[cur]=temp[i1++]; `A"Q3sf%
else if(temp[i1] data[cur]=temp[i1++]; A:c]1
else ixzTJ]yu
data[cur]=temp[i2++]; nFj-<!
} -? Tz.y&
} 3]_qj*V
d|3o/@k
} +l.|kkZ?
e2Ww0IK!E
改进后的归并排序: (s Jq;Z
>3+FZ@.iT
package org.rut.util.algorithm.support; V*~423
s<d!+<
import org.rut.util.algorithm.SortUtil; KJ pj
Y.9~Bo<<r
/** PnJ*Zea
* @author treeroot mb~./.5F
* @since 2006-2-2 ;'hi9L
* @version 1.0 94+/wzWvi
*/ W'V@
public class ImprovedMergeSort implements SortUtil.Sort { ~xE=mg4le
N)P((>S;
private static final int THRESHOLD = 10; a!?.F_T9A
%GS\1 Q%
/* yFi6jN#~
* (non-Javadoc) n_u`B|^Pj
* t5n2eOy~T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qf)C%3gXI
*/ Kny%QBoiw
public void sort(int[] data) { fZ{&dslg
int[] temp=new int[data.length]; M`bL5J;
mergeSort(data,temp,0,data.length-1); y]J3hKs
} }ymc5-
'1]+8E `Z
private void mergeSort(int[] data, int[] temp, int l, int r) { | yS5[?.`
int i, j, k; PK_Fx';ke^
int mid = (l + r) / 2; 2q/nAQ+
if (l == r) 3y/1!A3
return; _ r~+p
if ((mid - l) >= THRESHOLD) G{/;AK
mergeSort(data, temp, l, mid); mZ~mf->%
else 2|$lk8/,
insertSort(data, l, mid - l + 1); ,zG<7~m
if ((r - mid) > THRESHOLD) 8znj~7}#
mergeSort(data, temp, mid + 1, r); z2.*#xTZn
else `(!W s\:
insertSort(data, mid + 1, r - mid); O1|B3M[P
G&.d)NfE
for (i = l; i <= mid; i++) { K/Sq2:
temp = data; .|U4N/XN%q
} L>0!B8X2
for (j = 1; j <= r - mid; j++) { kpl~/i`4
temp[r - j + 1] = data[j + mid]; =?wMESU
} NoJUx['6
int a = temp[l]; I Jqv w
int b = temp[r]; 692Rw}/
for (i = l, j = r, k = l; k <= r; k++) { &3WkH W
if (a < b) { Mp^^!AP9
data[k] = temp[i++]; -g9^0V`G
a = temp; mMV2h|W
} else { *&(2`#C;
data[k] = temp[j--]; @X K>
b = temp[j]; N?\bBt@
} nG!&u1*
} KlY,NSlQ
} #NWZk.S
-QN1oK@\mE
/** BXNI(7xi
* @param data FwXKRZa
* @param l T!Xm")d
* @param i 1]_?$)$T
*/ 1V-=$Q3 V7
private void insertSort(int[] data, int start, int len) { C2CYIok$&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <%M\7NDWDA
} 5?Uo&e
} Tt{U"EFO
} A*rZQh b[
} -)4uYK*
U~oBNsU"
堆排序： ~g*Y, Y
@bc[ eas
package org.rut.util.algorithm.support; >_&~!Y.Z=
+.S#=
import org.rut.util.algorithm.SortUtil; J 5Wz4`'
j?Cr31
/** RP,A!pa@
* @author treeroot qUifw @
* @since 2006-2-2 _{lx*dq
* @version 1.0 ;,<r|.6U
*/ ".Lhte R?
public class HeapSort implements SortUtil.Sort{ rny@n^F
q1U&vZ3]c
/* (non-Javadoc) i:V0fBR[>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rn5"o8|
*/ /_$~rW
public void sort(int[] data) { 8.*\+nH
MaxHeap h=new MaxHeap(); "|(rVj=
h.init(data); aUKh})B
for(int i=0;i h.remove(); UedvA9$&;
System.arraycopy(h.queue,1,data,0,data.length); /!^L69um
} <Gn8B^~$
4kWg>F3
private static class MaxHeap{ ]|Ow_z8 O
N8,EI^W8Z
void init(int[] data){ nu#aa#ex>
this.queue=new int[data.length+1]; hO^&0?
for(int i=0;i queue[++size]=data; K?5B>dv@A
fixUp(size); 2=igS#h
} TrSN00
} wrz+2EP`
\Ku9"x
private int size=0; 'dmp4VT3
N90\]dFmy
private int[] queue; jHs<s`#h
3C>2x(]M
public int get() { P3+)pOE-SI
return queue[1]; B0-4ZT
} ."~7 \E> t
lAdOC5+JX
public void remove() { 80{#bb
SortUtil.swap(queue,1,size--); K)yCrEZ
fixDown(1); hg%@W
} T)b3N|ONB
file://fixdown iifc;62
private void fixDown(int k) { a"`g"ZRx
int j; ) 1lJ<g#
while ((j = k << 1) <= size) { /W"Bf
if (j < size %26amp;%26amp; queue[j] j++; s5c! ^,L8
if (queue[k]>queue[j]) file://不用交换 N,WI{*
break; 03X<x|
SortUtil.swap(queue,j,k); "\VW.S
k = j; GOv92$e
} y+K7WUwhq
} AzHIp^
private void fixUp(int k) { P`\m9"7
while (k > 1) { ^tm++
int j = k >> 1; >$7wA9YhL
if (queue[j]>queue[k]) -D!#W%y8
break; J>HLQP
SortUtil.swap(queue,j,k); Ck ~V5
k = j; t] n(5!L(
} Y0/jH2n
} '_q: vjX
_Vdb?
} @D.R0uM
?RgU6/2
} s=H/b$v
F|]o9&/<]
SortUtil： ATYQ6E[{MV
AIvL#12
package org.rut.util.algorithm; j33P~H~
*=-__|t
import org.rut.util.algorithm.support.BubbleSort; WmT}t
import org.rut.util.algorithm.support.HeapSort; 2+T8Y,g
import org.rut.util.algorithm.support.ImprovedMergeSort; TEaD-mY3
import org.rut.util.algorithm.support.ImprovedQuickSort; E3CiZ4=5
import org.rut.util.algorithm.support.InsertSort; `-72>F;T
import org.rut.util.algorithm.support.MergeSort; :GwSs'$O
import org.rut.util.algorithm.support.QuickSort; '8r8 ^g[
import org.rut.util.algorithm.support.SelectionSort; )8 "EI-/.
import org.rut.util.algorithm.support.ShellSort; Pe+ 8~0o=R
bqg]DO$*
/** /%J&/2Wz
* @author treeroot < "L){$
* @since 2006-2-2 ?)Czl4J
* @version 1.0 &xGfkCP.]
*/ RE`J"&
public class SortUtil { 9A/Kn]s(jj
public final static int INSERT = 1; 8!o{W=m^4
public final static int BUBBLE = 2; +E q~X=x
public final static int SELECTION = 3; / K_e;(Y_
public final static int SHELL = 4; lRF_ k
public final static int QUICK = 5; 48 c D3w
public final static int IMPROVED_QUICK = 6; H y.3ccZ0
public final static int MERGE = 7; y(c|5CQ
public final static int IMPROVED_MERGE = 8; 5UrXVdP
public final static int HEAP = 9; 5`{|[J_[
an$]IN
public static void sort(int[] data) { G*vpf~q?
sort(data, IMPROVED_QUICK); p:[`%<j0
} g:.,}L
private static String[] name={ *O(/UVuD\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" | Q1ubS
}; ecY ^C3+S
@n~>j&Kp
private static Sort[] impl=new Sort[]{ w+).pcG(*
new InsertSort(), NgE&KPj\
new BubbleSort(), F(KH-
new SelectionSort(), !_XU^A>
new ShellSort(), \pewbu5^
new QuickSort(), #FQm/Q<0
new ImprovedQuickSort(), )5GdvqA
new MergeSort(), hSx+{4PZ
new ImprovedMergeSort(), $+lz<~R
new HeapSort() 6yu*a_
}; )F%wwc^r
4PO%qO
public static String toString(int algorithm){ yv!''F:9F
return name[algorithm-1]; TzevC$m;z
} X5L(_0?F1
|7S4;
public static void sort(int[] data, int algorithm) { 7kX7\[zN
impl[algorithm-1].sort(data); +c]N]?k&
} 9?g]qy,1)
r7Q:l ?F2
public static interface Sort { -_{C+Y_
public void sort(int[] data); l$p_])x
} (Qx-KRH
VeN&rjc
public static void swap(int[] data, int i, int j) { T4HoSei
int temp = data; _M"$5 T
data = data[j]; 2#n$x*CY
data[j] = temp; g6@NPQ
} +QXYU8bYZ
} qa0JQ_?o]