[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; Fp@eb8Pl
} $XT&8%|*7
int i1=l; /V&$SRdL*
int i2=mid+1; 3=;iC6 `
for(int cur=l;cur<=r;cur++){ W-Hw%bwN/q
if(i1==mid+1) VZ_4B *D
data[cur]=temp[i2++]; J5|Dduv
else if(i2>r) o^DiIoor
data[cur]=temp[i1++]; yDy3;*lE
else if(temp[i1] data[cur]=temp[i1++]; 27,WP-qie
else U R@'J@V#:
data[cur]=temp[i2++]; -*?a*q/#nQ
} ,$}v_-:[l
} $lV0TCgba8
\>,{)j q;
} <=19KSGFt
\Sm.]=br
改进后的归并排序: [lyB@) 6.
<V>vDno\
package org.rut.util.algorithm.support; tYmWze.j
S~Nx;sB
import org.rut.util.algorithm.SortUtil; C7qbofoV
of{wZU\J+9
/** 8?I(wn
* @author treeroot Q&n
* @since 2006-2-2 `' 6]Z*
* @version 1.0 E$8GXo00v
*/ gDAA>U3|$
public class ImprovedMergeSort implements SortUtil.Sort { ].:S!QO
(M5=8g%>d
private static final int THRESHOLD = 10; NSM-p.I9
V=E9*$b]
/* #a}fI
* (non-Javadoc) =A=er1~%
* c*1B*_08
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3(FJ<,"D}
*/ 7%)4cHZ^$?
public void sort(int[] data) { 0YIvE\-
int[] temp=new int[data.length]; ChmPO|2F
mergeSort(data,temp,0,data.length-1); vK2L"e
} K mL PWj
jsi\*5=9p<
private void mergeSort(int[] data, int[] temp, int l, int r) { Z;??j+`Eo
int i, j, k; :LcR<>LZ
int mid = (l + r) / 2; s "*Cb*
if (l == r) fE_QB=9 cz
return; ,|T
if ((mid - l) >= THRESHOLD) s(wbsRVP8
mergeSort(data, temp, l, mid); t;y>q
else q] ,&$d^@
insertSort(data, l, mid - l + 1); *K m%Vl
if ((r - mid) > THRESHOLD) 6 D~b9e
mergeSort(data, temp, mid + 1, r); 4[+n;OI
else ]S%qfna e1
insertSort(data, mid + 1, r - mid); F=d#$-yg
CS6,mX
for (i = l; i <= mid; i++) { =b !f
temp = data; \Sg&Qv`
} '+'
for (j = 1; j <= r - mid; j++) { u49/LtB\
temp[r - j + 1] = data[j + mid]; roL~r`f`
} H#wn3O
int a = temp[l]; fn;7Nf7{
int b = temp[r]; ZJ+q<n_4}
for (i = l, j = r, k = l; k <= r; k++) { j.ANBE96>
if (a < b) { 3haY{CEr
data[k] = temp[i++]; D97oS!*
a = temp; N}\$i&Vi
} else { 3go!P])
data[k] = temp[j--]; 1 ht4LRFi
b = temp[j]; Isoqs(Oi
} <qHwY.
} `iQyKZS/+
} dsJ}C|N
$WTu7lVV[1
/** #2x\d
* @param data d [K56wbpx
* @param l 9[$g;}w
* @param i Kw925@W
*/ \]y$[\F>
private void insertSort(int[] data, int start, int len) { JLc\KVmF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S>cT(q_&
} =X-$kk
} 0~n=|3*P
} CBi V':;
} Ig5J_Z^]b
D2?~03c
堆排序： > -k$:[l
\ m2[
package org.rut.util.algorithm.support; 97$y,a{6
^B]M- XG
import org.rut.util.algorithm.SortUtil; inR8m 4c]P
a>""MC2
/** HykJ}ezX4
* @author treeroot B`T9dL[E4
* @since 2006-2-2 [f- #pew
* @version 1.0 Cn+TcdHX
*/ c;(}Ih(#
public class HeapSort implements SortUtil.Sort{ ;k!Ej-(
e|Lh~sVq
/* (non-Javadoc) NaAq^F U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5_=&U-? H
*/ R,6?1Z:J
public void sort(int[] data) { -,zNFC:6g
MaxHeap h=new MaxHeap(); e2/[`k=7-
h.init(data); pMs%`j#T
for(int i=0;i h.remove(); :/ "qNPJ
System.arraycopy(h.queue,1,data,0,data.length); C7)].vUN
} l^"gpO${K
Kd^ ._
private static class MaxHeap{ 9J l9\y9
G0a UZCw
void init(int[] data){ @bD,^3U
this.queue=new int[data.length+1]; ^"*r'
for(int i=0;i queue[++size]=data; sQTW?KA-Te
fixUp(size); F+c*v#T
} ) VJ|
} {e>}.R
5UjXpS
private int size=0; p?6w/n
OP``g/x)
private int[] queue; +F+jC9j(<
]sbu9O ^"f
public int get() { #[Ns\%Ri0
return queue[1]; ZTHrjW1
} ?4gYUEM#
~~wz05oRG
public void remove() { Z(.p=Wg
SortUtil.swap(queue,1,size--); mxDy!:@=
fixDown(1); INcJXlv
} U_oMR$/Z
file://fixdown l_QpPo!a
private void fixDown(int k) { qItj`F)d
int j; kj+AsQC,
while ((j = k << 1) <= size) { umD .
if (j < size %26amp;%26amp; queue[j] j++; `[Z?&'CRQ
if (queue[k]>queue[j]) file://不用交换 oh,Nu_!
break; IsnC_"f
SortUtil.swap(queue,j,k); se7_:0+w
k = j; ow]n)Te
} 8 I,(\<Xv
} "64pVaT4
private void fixUp(int k) { H:p(C?tk{
while (k > 1) { rS6iZp,
int j = k >> 1; MhJq~G p
if (queue[j]>queue[k]) 1xcx2L+R
break; c69B[Vjb
SortUtil.swap(queue,j,k); [Zgy,j\\
k = j; j3A+:KDn3n
} /I".n]
} NeeymyW
MqXA8D
} rd. "mG.
Q:@Y/4=
} va#~ \%`
%qN8uQx
SortUtil： wk)gxn1A,
/m9t2,KB
package org.rut.util.algorithm; PvKe|In(
TC J\@|yw
import org.rut.util.algorithm.support.BubbleSort; Q_M2!qj
import org.rut.util.algorithm.support.HeapSort; D~8f6Ko"m
import org.rut.util.algorithm.support.ImprovedMergeSort; ?Tb'J`MO
import org.rut.util.algorithm.support.ImprovedQuickSort; eN,m8A`/S
import org.rut.util.algorithm.support.InsertSort; (Tc ~
import org.rut.util.algorithm.support.MergeSort; 5.5dB2w
import org.rut.util.algorithm.support.QuickSort; ilpg()
import org.rut.util.algorithm.support.SelectionSort; N[zI@>x
import org.rut.util.algorithm.support.ShellSort; 42Ql^ka
$mp7IZE|
/** #N,\c@Gy
* @author treeroot (Z6[a{}1i
* @since 2006-2-2 x$6-7<p
* @version 1.0 X9zTz2 Fy
*/ gy~M]u{
public class SortUtil { :n>:*e@w%
public final static int INSERT = 1; r\_aux^z
public final static int BUBBLE = 2; 'VR5>r
public final static int SELECTION = 3; l.b
public final static int SHELL = 4; .r]n<
public final static int QUICK = 5; b]CJf8'u
public final static int IMPROVED_QUICK = 6; M`iJ6L
public final static int MERGE = 7; qfN<w&P
public final static int IMPROVED_MERGE = 8; 9Q].cDe[
public final static int HEAP = 9; YQe @C
LOe!qt\&
public static void sort(int[] data) { 4Mg09
sort(data, IMPROVED_QUICK); I>G)wRpfR'
} [y>Q3UqN
private static String[] name={ /rJvw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c( gUH
}; "ve?7&G7U
-7;RPHJs
private static Sort[] impl=new Sort[]{ ~+^,o_hT
new InsertSort(), vad" N
new BubbleSort(), <}B|4($
new SelectionSort(), 5F&i/8Ib
new ShellSort(), {`l]RIig
new QuickSort(), IcaIB)
new ImprovedQuickSort(), f{^n<\Jh
new MergeSort(), (|O;Ci
new ImprovedMergeSort(), 2ZLK`^S
new HeapSort() x7{,4js
}; QR79^A@5
&tp5y}=n
public static String toString(int algorithm){ ~x>IN1Vci
return name[algorithm-1]; _%<7!|"
} -YSn 3=
G|Q}.v
public static void sort(int[] data, int algorithm) { F-_RL-hbN%
impl[algorithm-1].sort(data); Rp.@
} Ia>qVM0
^JYR^X>_
public static interface Sort { _FAwW<S4B
public void sort(int[] data); T /[)U
} B(b[Dbb
FKL}6W:
public static void swap(int[] data, int i, int j) { "D@m/l
int temp = data; .[K{;^>
data = data[j]; 9HP)@66
data[j] = temp; Oi l>bv8
} l 4~'CLi
} MY1 tYO