[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; I,?NYIG"(
} )&c2+Y@
int i1=l; c2E /-n4K@
int i2=mid+1; A2'i~_e
for(int cur=l;cur<=r;cur++){ -KiPqE%&G
if(i1==mid+1) i fsh(^N
data[cur]=temp[i2++]; $@AJg
else if(i2>r) yzS]FwW7
data[cur]=temp[i1++]; *6s_7{;
else if(temp[i1] data[cur]=temp[i1++]; ~;"eNg{T
else (}A$4?
data[cur]=temp[i2++]; k[Em~>m
} `H'G"V
} ]iV]7g8:
<5zR-UA>
} oC&}lp)q
`G\ qGllX
改进后的归并排序: N*IroT3
z|g2Q#$-\S
package org.rut.util.algorithm.support; 49qa
e@'x7Zzh
import org.rut.util.algorithm.SortUtil; \8{SQ%
lu#a.41
/** }z]d]
* @author treeroot ?^&ih:"
* @since 2006-2-2 Ac_P^
* @version 1.0 IFLphm5
*/ ql?w6qFs]
public class ImprovedMergeSort implements SortUtil.Sort { |_53So:g
> X~\(|EM
private static final int THRESHOLD = 10; uLdHE5vr
5wK==hZ
/* s< tG
* (non-Javadoc) uKx:7"KD
* b_+o1Zy`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0|GYtnd
*/ _/>ktYo:
public void sort(int[] data) { "aGmv9\
int[] temp=new int[data.length]; H1N@E}>|
mergeSort(data,temp,0,data.length-1); (kL"*y/"p
} @nH3nn
\'O/3Y7?X
private void mergeSort(int[] data, int[] temp, int l, int r) { frcAXh9
int i, j, k; M"z=114
int mid = (l + r) / 2; >N^<Q4%2
if (l == r) cW3'057
return; wSR|uh
if ((mid - l) >= THRESHOLD) Zg+.`>z
mergeSort(data, temp, l, mid); igu1s}F
else {4+/0\
insertSort(data, l, mid - l + 1); :!i=g+e]
if ((r - mid) > THRESHOLD) cS.@02~f"
mergeSort(data, temp, mid + 1, r); 5<Kt"5Z%7
else B)q}]Qn
insertSort(data, mid + 1, r - mid); a^_K@
U&3!=|j
for (i = l; i <= mid; i++) { Y{dSQ|xz^
temp = data; uQdeKp4(
} 7w73,r/D8A
for (j = 1; j <= r - mid; j++) { e1[ReZW
temp[r - j + 1] = data[j + mid]; -Mo4`bN
} c&;" Y{
int a = temp[l]; dv. 77q
int b = temp[r]; TOiLv.Dor
for (i = l, j = r, k = l; k <= r; k++) { qO@vXuul,
if (a < b) { [n9l[dN
data[k] = temp[i++]; fw%p_Cm
a = temp; C:1(<1K
} else { a`Bp^(f}
data[k] = temp[j--]; nOC\ =<Nsg
b = temp[j]; B7Ket8<J
} EWJB/iED
} *twGIX
} <MEm+8e/s6
P$'PB*5d|
/** TTG=7x:3
* @param data Bo:epus}\
* @param l _JC*4
* @param i s(_z1
*/ ?g1eW q&
private void insertSort(int[] data, int start, int len) { t__f=QB/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8jCho
} qiOtbH=
} Y*xgY*K
} ,DEq"VW_
} .BxI~d^
<.`i,|?MHS
堆排序： wPI!i K@Ro
t %u0=V
package org.rut.util.algorithm.support; L#`X ]E
J@_M%eN
import org.rut.util.algorithm.SortUtil; C.4(8~Y=~
EG4~[5[YgI
/** `n,RC2yo
* @author treeroot Gd!_9S`68
* @since 2006-2-2 km>ZhsqD
* @version 1.0 /Ey%aA4v
*/ =U84*HAv
public class HeapSort implements SortUtil.Sort{ $`OyGeq"T
d/GSG%zB
/* (non-Javadoc) @o[ZJ4>*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m 70r'b]
*/ Z6B$\Q5Od
public void sort(int[] data) { R1JD{
MaxHeap h=new MaxHeap(); $\/i t
h.init(data); +PPQ"#1pS
for(int i=0;i h.remove(); }^I36$\
System.arraycopy(h.queue,1,data,0,data.length); o4: e1
} 548L^"D
/%&5Iq\:vA
private static class MaxHeap{ 6[t(FcS
7 @\i5
void init(int[] data){ p` ~=v4;b
this.queue=new int[data.length+1]; "3_X$`v"!
for(int i=0;i queue[++size]=data; t=lDN'\P
fixUp(size); w[a(I}x
} 5_A*IC]
} Na`> pH
(x% 4*
private int size=0; AQ FnS&Y
b~ )@e9
private int[] queue; "} :CM_
lDBAei3iB
public int get() { YuuTLX%3
return queue[1]; ^coCsV^CW"
} 7cV G?Wr
+Zi+ /9Z(H
public void remove() { )Q9Qo)D T
SortUtil.swap(queue,1,size--); [1GwcXr
fixDown(1); L'Iw9RAJ
} C D6N8n]
file://fixdown z,ryY'ua/I
private void fixDown(int k) { 1N65 M=)
int j; ~%lUzabMa
while ((j = k << 1) <= size) { fAkfNH6
if (j < size %26amp;%26amp; queue[j] j++; U=%(kOx
if (queue[k]>queue[j]) file://不用交换 [PXq<ST
break; #P!<u Lc%
SortUtil.swap(queue,j,k); Sg%s\p]N_#
k = j; ~jJ.E_i
} /0>'ZzjV,
} 6RIbsy
private void fixUp(int k) { ;Ows8
while (k > 1) { FD!8o
int j = k >> 1; 6yYjZ<
if (queue[j]>queue[k]) %qsl<_&
break; ] 0L=+=w
SortUtil.swap(queue,j,k); ZweAY.]e
k = j; IjOBY
} &I-T
} kE6/d,
RU#}!Kq
} &b>&XMIK
iN[6}V6Sm
} )AEtW[~D
bGB$a0
SortUtil： >aVtYp B
k)z>9z%D
package org.rut.util.algorithm; AEM;ZQU
aZo}Ix:/
import org.rut.util.algorithm.support.BubbleSort; %Unwh1VG
import org.rut.util.algorithm.support.HeapSort; |3FGMg%
import org.rut.util.algorithm.support.ImprovedMergeSort; 5'DY)s-K
import org.rut.util.algorithm.support.ImprovedQuickSort; LV1drc
import org.rut.util.algorithm.support.InsertSort; iM7^
import org.rut.util.algorithm.support.MergeSort; UM0Ws|qx&
import org.rut.util.algorithm.support.QuickSort; 0N)DHD?U
import org.rut.util.algorithm.support.SelectionSort; T_s09Wl
import org.rut.util.algorithm.support.ShellSort; \^pc"?Rc
dYOY8r/
/** Mb"y{Fox
* @author treeroot k8J zey]X
* @since 2006-2-2 oM>UIDCY_v
* @version 1.0 AMB{Fssz
*/ sWse (_2
public class SortUtil { mVS^HQ:
public final static int INSERT = 1; Hr=|xw8.
public final static int BUBBLE = 2; ,%A|:T]
public final static int SELECTION = 3; #mJRL[V5^
public final static int SHELL = 4; X'\h^\yOo
public final static int QUICK = 5; R<I#. KD
public final static int IMPROVED_QUICK = 6; z.(DDj
public final static int MERGE = 7; lq.]@zlSO
public final static int IMPROVED_MERGE = 8; k(7Q\JKE
public final static int HEAP = 9; H_XspiB@
*MlEfmB(
public static void sort(int[] data) { PepR]ym
sort(data, IMPROVED_QUICK); g/68& M
} gREk,4DAv
private static String[] name={ s5G`?/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }^Sk.:;n3
}; S W6oaa81
K0oF=|
private static Sort[] impl=new Sort[]{ xR$T/]/
new InsertSort(), f`;w@gR`=
new BubbleSort(), bbjEQby
new SelectionSort(), X}]A_G
new ShellSort(), OqRRf
new QuickSort(), ]zAwKuIK
new ImprovedQuickSort(), u{HO6s\S
new MergeSort(), yK&
new ImprovedMergeSort(), Ad,n+%"e
new HeapSort() QEut@L
}; NCT:!&
hP'4PLK
public static String toString(int algorithm){ Tc"J(GWG
return name[algorithm-1]; 7vRp<
} {U>N*&_`
qe(gKKA%q
public static void sort(int[] data, int algorithm) { 7@g0>1Fz
impl[algorithm-1].sort(data); RhB)AUAj
} %rhZH^2
iF +@aA
public static interface Sort { }=\?]9`
public void sort(int[] data); CV=qcD
} 21Dc.t{
"l-#v| 54
public static void swap(int[] data, int i, int j) { WcT= 5G
int temp = data; u23_*W\
data = data[j]; x'\C'zeF
data[j] = temp; g yV>k=B
} 'wYIJK~1
} /TPtPq<7:#