[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; t|}}#Z!I[f
} pn aSOyR
int i1=l; /9@VnM
int i2=mid+1; iiTt{ab\Y
for(int cur=l;cur<=r;cur++){ / #D R|
if(i1==mid+1) Q;eY]l8
data[cur]=temp[i2++]; "|d# +C
else if(i2>r) p2(Z(V7*
data[cur]=temp[i1++]; L<ET"&b;4
else if(temp[i1] data[cur]=temp[i1++]; y3@5~4+
else _ v3VUm#
data[cur]=temp[i2++]; Hus.Jfam
} uwWKsZ4:ij
} \ H!Klp
/yTPb
} KWiP`h8
G Y+li{
改进后的归并排序: {1J4Q[N9m
#b$qtp!,
package org.rut.util.algorithm.support; d&t,^Hj
9 kLA57
import org.rut.util.algorithm.SortUtil; yuq2)
CjUYwAy$k
/** &O^t]7
* @author treeroot ^_G@a,
* @since 2006-2-2 {Z^q?~zC[
* @version 1.0 d2X?^
*/ VqnM>||
public class ImprovedMergeSort implements SortUtil.Sort { DN;3VT.-
:r}C&3
private static final int THRESHOLD = 10; ..UA*#%1
-s9()K(vZG
/* ^D A<=C-[!
* (non-Javadoc) <^Jdl.G
* |?4NlB6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .g!K| c
*/ WM9z~z'2a
public void sort(int[] data) { aBWA hn
int[] temp=new int[data.length]; <j:@ iP
mergeSort(data,temp,0,data.length-1); [Lq9lw&
} _~O*V&
!AN;
private void mergeSort(int[] data, int[] temp, int l, int r) { t_jnp $1m
int i, j, k; 3_ko=& B$
int mid = (l + r) / 2; @IV,sze
if (l == r) % !Ih=DZ
return; nfksi``Vq
if ((mid - l) >= THRESHOLD) q@vqhE4
mergeSort(data, temp, l, mid); N."x@mV
else QAX3*%h
insertSort(data, l, mid - l + 1); 1C(sBU"
if ((r - mid) > THRESHOLD) x.Tulo0/
mergeSort(data, temp, mid + 1, r); O2"5\@HfE
else lESv
insertSort(data, mid + 1, r - mid); Tb\<e3Te_
YFP<^y=
for (i = l; i <= mid; i++) { ~]SCf@pRk
temp = data; k{D0&
} G%viWWTY
for (j = 1; j <= r - mid; j++) { zZ;V9KM>v
temp[r - j + 1] = data[j + mid]; "v/Yw'! )
} c&C*'c-r
int a = temp[l]; LZ RP}|
int b = temp[r]; ch33+~Nn
for (i = l, j = r, k = l; k <= r; k++) { @D>qo=KPM
if (a < b) { Uo;a$sR
data[k] = temp[i++]; D~n-;T
a = temp; aNP\Q23D
} else { ik1asj1
data[k] = temp[j--]; !6,rN_a@Y
b = temp[j]; Wg,7k9I
} 8*Ty`G&v
} bjAI7B8As
} n'[>h0
<<R2 X1
/** '}IGV`c
* @param data NS-0-o|4#
* @param l d:"7Tw2v+
* @param i z_Hkw3?
*/ |AS~sjWSJ
private void insertSort(int[] data, int start, int len) { dh9@3. t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~tn$AtK
} H4W!Md
} *W;;L_V"
} 0s79rJ
} r6GXmr
=cO5Nt
堆排序： X ]W)D S
,4Q8r:_ u
package org.rut.util.algorithm.support; &XCP@@T
uQ|LkL%<^
import org.rut.util.algorithm.SortUtil; 41P0)o
s\<UDW
/** 2qojU%fiH
* @author treeroot 6lT< lzT
* @since 2006-2-2 6TTu[*0NT
* @version 1.0 aRElk&M
*/ 8!YQ9T[
public class HeapSort implements SortUtil.Sort{ q*94vo-
$41<ldJ
/* (non-Javadoc) "?<(-,T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bh'!aipk
*/ &xA>(|a\&-
public void sort(int[] data) { vxOnv8(
MaxHeap h=new MaxHeap(); (E7"GJ
h.init(data); J%n#uUs
for(int i=0;i h.remove(); l fFRqZ
System.arraycopy(h.queue,1,data,0,data.length); @,7r<6E
} P_'{|M<?
-v-kFzu
private static class MaxHeap{ ![$`Ivro`
;Yv{)@'Bc
void init(int[] data){ JdLPIfI^
this.queue=new int[data.length+1]; ^M%P43
for(int i=0;i queue[++size]=data; ?PqkC&o[q
fixUp(size); !#~KSO}zW2
} Uk*(C(
} v_Df+
Z=Cw7E
private int size=0; w>8kBQ?b
&-{%G=5~e%
private int[] queue; M$Bb,s
QmSMDWkh
public int get() { egBk7@Ko
return queue[1]; ,|A6l?iV
} ?@Q0;LG
<T;V9(66
public void remove() { *C0a,G4
SortUtil.swap(queue,1,size--); 8EMBqhl
fixDown(1); cvo+{u$s
} K F_Uu
file://fixdown tzfyS#E
private void fixDown(int k) { B9[vv;lzu
int j; ~cyKPg6
while ((j = k << 1) <= size) { ^#C+l
if (j < size %26amp;%26amp; queue[j] j++; U;TS7A3
if (queue[k]>queue[j]) file://不用交换 |vm-(HY!
break; jSM`bE+"
SortUtil.swap(queue,j,k); OI*ltba?
k = j; Ly3!0P.<
} d}tmZ*q
} oV;sd5'LG
private void fixUp(int k) { j`q>YPp
while (k > 1) { DU8\1(
int j = k >> 1; GF9[|). T
if (queue[j]>queue[k]) \!30t1EZ
break; $]Ix(7@W
SortUtil.swap(queue,j,k); tu"-]^
k = j; 3 !8#wn
} (9ZW^flY
} G_5{5Ar
Y0kcxpK/
} }!k?.(hpE
9H;Os:"\|
} }yn%_KQ0
gK;dfrU.8Y
SortUtil： qoH:_o8ClO
{5D%<Te
package org.rut.util.algorithm; aMGh$\Pg
`GBJa k
import org.rut.util.algorithm.support.BubbleSort; AzF*4x
import org.rut.util.algorithm.support.HeapSort; & wtE"w
import org.rut.util.algorithm.support.ImprovedMergeSort; m1jEky(
import org.rut.util.algorithm.support.ImprovedQuickSort; 7Hv6>z#m
import org.rut.util.algorithm.support.InsertSort; 2bLc57j{`9
import org.rut.util.algorithm.support.MergeSort; d*e8P ep
import org.rut.util.algorithm.support.QuickSort; qdwo2u
import org.rut.util.algorithm.support.SelectionSort; EtPB_! +
import org.rut.util.algorithm.support.ShellSort; EPLHw
{fDRVnI?
/** \p(0H6
* @author treeroot BeQ'\#q,
* @since 2006-2-2 BTj1C
* @version 1.0 H_3WxfO
*/ W`JI/
public class SortUtil { 1 oKY7i$
public final static int INSERT = 1; f/Y7@y
public final static int BUBBLE = 2; .sQV0jF{
public final static int SELECTION = 3; r}e(MT:R'
public final static int SHELL = 4; Q?LzL(OioN
public final static int QUICK = 5; 7VZ^J`3
public final static int IMPROVED_QUICK = 6; Z.Z31yF:f
public final static int MERGE = 7; +mD;\iW]
public final static int IMPROVED_MERGE = 8; :|S[i('
public final static int HEAP = 9; E$4H;SN \
B8T5?bl
public static void sort(int[] data) { EXjR&"R
sort(data, IMPROVED_QUICK); 5wh(Qdib
} yx&}bu\
private static String[] name={ 87B$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A{B$$7%
}; e 2NF.
/6[vF)&
private static Sort[] impl=new Sort[]{ ]AM*9!
new InsertSort(), 0vDvp`ie#4
new BubbleSort(), roAHkI
new SelectionSort(), 2B6u) 95
new ShellSort(), *^7^g!=z2
new QuickSort(), |}e"6e%
new ImprovedQuickSort(), uEr.LCAS
new MergeSort(), R\n@q_!`X
new ImprovedMergeSort(), PBW_9&d
new HeapSort() 6tP!(
}; n} !')r
/Us+>vg!
public static String toString(int algorithm){ |B$JX'_
return name[algorithm-1]; *gGw/jA/
} Lw^%<.DM+t
QD^=;!
public static void sort(int[] data, int algorithm) { pX3El$p
impl[algorithm-1].sort(data); Sh-B!
} Z ]ZUK
^-s7>F`jx
public static interface Sort { AVU'rsXA
public void sort(int[] data); 2,B^OZmw
} ~Ni-}p
Wt!;Y,1s
public static void swap(int[] data, int i, int j) { imwn)]LR
int temp = data; knHrMD;
data = data[j]; XAF]B,h=
data[j] = temp; %jq R^F:J
} [a$1{[|)
} xOg|<Nnl