[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; I78pul8!
} \[jItg,+
int i1=l; 0<k!F3=
int i2=mid+1; X9wi:
for(int cur=l;cur<=r;cur++){ C3gz)!3
if(i1==mid+1) H_]kR&F8
data[cur]=temp[i2++]; | w -W=v
else if(i2>r) H0 t1& :
data[cur]=temp[i1++]; M?lr#}d
else if(temp[i1] data[cur]=temp[i1++]; B\yid@e
else mD3#$E!A1
data[cur]=temp[i2++]; [8#l~ |U
} Qg=~n:j
} 9m4|1)
$_kU)<e3
} X.qKG0i
C? S%fF
改进后的归并排序: *fZ'#C~x
?=&*6H_v
package org.rut.util.algorithm.support; 5N0H^
"H8N,eb2
import org.rut.util.algorithm.SortUtil; zT8K})#
F_`Gs8-VH
/** *6DKUCA/
* @author treeroot ;C'*Ui
* @since 2006-2-2 1)y}.y5S
* @version 1.0 r>\.b{wI
*/ PH.v3 3K
public class ImprovedMergeSort implements SortUtil.Sort { &/p9+gd
; V8 =B8w
private static final int THRESHOLD = 10; T28#?Lp6]
lKcnM3n
/* ifUgj8i_
* (non-Javadoc) q_bB/
* #%~wuCn<K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &I8ZVtg
*/ lCXo+|$?s
public void sort(int[] data) { %"D-1&%zY
int[] temp=new int[data.length]; lOZZ-
mergeSort(data,temp,0,data.length-1); r.[kD"l
} *P>F# ~X
DwPl,@T_i\
private void mergeSort(int[] data, int[] temp, int l, int r) { %y'#@%kO:S
int i, j, k; "Z <1Msz
int mid = (l + r) / 2; t$b`Am
if (l == r) HzV3O-Qz]
return; :|bPr_&U$
if ((mid - l) >= THRESHOLD) {>#Ya;E
mergeSort(data, temp, l, mid); *:iFhKFU
else r?{tBju^
insertSort(data, l, mid - l + 1); 6B=J*8 Hs
if ((r - mid) > THRESHOLD) sHNt>5p
mergeSort(data, temp, mid + 1, r); cOSUe_S0w[
else TeHR,GB
insertSort(data, mid + 1, r - mid); YC{od5a
] '..G-
for (i = l; i <= mid; i++) { nL9m{$Zv
temp = data; k2~j:&p
} -O\`G<s%
for (j = 1; j <= r - mid; j++) { PM{kiz^
temp[r - j + 1] = data[j + mid]; ?o2L
} C.eZcNJG
int a = temp[l]; ,xGkE7=5
int b = temp[r]; FKPI{l
for (i = l, j = r, k = l; k <= r; k++) { wml`3$"cf
if (a < b) { s<:J(gD
data[k] = temp[i++]; k7?(IU
a = temp; Re`= B
} else { r>Vgo):s
data[k] = temp[j--]; 3/iGSG`
b = temp[j]; U.&=b<f(0r
} ,Ao8QN
} E8/P D
} 7C=t19&R'
N7XRk=J
/** 4q2aVm
* @param data uv,t(a.^
* @param l _|3n h;-m
* @param i N G4wtDa
*/ h<[o;E
private void insertSort(int[] data, int start, int len) { Jf2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "!2Fy-Y
} US-P>yF
} pl5!Ih6
} M*nfWQ a
} YDP<
D+tn<\LF
堆排序： 6:Ra3!V"v
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package org.rut.util.algorithm.support; ) b?HK SqI
n(&6E3ZcI
import org.rut.util.algorithm.SortUtil; ;sDFTKf
Pl U!-7
/** {A{=RPL
* @author treeroot :*1bhk8~
* @since 2006-2-2 1Nv_;p.{
* @version 1.0 K*>lq|iu
*/ 6tVB}UKs
public class HeapSort implements SortUtil.Sort{ uGOvZO^v
]w({5i
/* (non-Javadoc) c8A //
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !$P&`n]@
*/ -3A#a_fu
public void sort(int[] data) { xI$B",?(
MaxHeap h=new MaxHeap(); 'F1NBL
h.init(data); g9g^zd,
for(int i=0;i h.remove(); V#zDYrp
System.arraycopy(h.queue,1,data,0,data.length); ht` !@B
} \xwE4K
+c?1\{M
private static class MaxHeap{ 42mdak}\
C*=#=.~~{
void init(int[] data){ p "u5wJ_
this.queue=new int[data.length+1]; |oa9 g2
for(int i=0;i queue[++size]=data; IWX%6*Zz
fixUp(size); !ce5pA
} ZdfIe~Oni
} vn7<>k>dx
O.Z<dy+
private int size=0; ,*Jm\u
1 %K^(J;
private int[] queue; j"hfsA<_I
!q mnMY$
public int get() { t0(1qFi
return queue[1]; F.zn:yX5
} H1]G<N3
&Nl:
public void remove() { (bY#!16C:
SortUtil.swap(queue,1,size--); Y;G+jC8
fixDown(1); N^H~VG&D(
} 4fgA3%
file://fixdown s${ew.eW
private void fixDown(int k) { s0WI93+z
int j; %Sf%XNtu
while ((j = k << 1) <= size) { lOYzo
if (j < size %26amp;%26amp; queue[j] j++; 1*,f
if (queue[k]>queue[j]) file://不用交换 '(4$h3-gv7
break; uDbz`VpK
SortUtil.swap(queue,j,k); 9v=5x[fE
k = j; hKj"Lb9]
} Tapj7/0`
} 0P_qtS
private void fixUp(int k) { ?VmEbl
while (k > 1) { ]X%T^3%G
int j = k >> 1; 9q(*'rAm
if (queue[j]>queue[k]) >fNRwmi
break; SjgjGJw
SortUtil.swap(queue,j,k); (< gk<e*
k = j; gZ8n[zxf6
} hi^@969
} &z8I@^<
W6:ei.d+NS
} 80DcM9^t8
S2T~7-
} hE@s~~JYd
$)8b)Tb
SortUtil： gTa6%GM>
Y%m^V?k
package org.rut.util.algorithm; KF(N=?KO
FwKT_XkY
import org.rut.util.algorithm.support.BubbleSort; 6qp2C]9=
import org.rut.util.algorithm.support.HeapSort; VPBlU
import org.rut.util.algorithm.support.ImprovedMergeSort; ZUPlMHc
import org.rut.util.algorithm.support.ImprovedQuickSort; pCb3^# &o
import org.rut.util.algorithm.support.InsertSort; /Sy:/BQ
import org.rut.util.algorithm.support.MergeSort; WrP4*6;"
import org.rut.util.algorithm.support.QuickSort; qRC-+k:
import org.rut.util.algorithm.support.SelectionSort; ?Zu2=<DU
import org.rut.util.algorithm.support.ShellSort; 0<(F 8
p}I,!~}
/** d)d\h`=Z
* @author treeroot {kVhht]X
* @since 2006-2-2 V}_M\Y^^;
* @version 1.0 \-i5b
*/ vy&q7EX<i
public class SortUtil { x=]PE}<E
public final static int INSERT = 1; 2?J[D7
public final static int BUBBLE = 2; rRgP/E#_
public final static int SELECTION = 3; D_VAtz
public final static int SHELL = 4; Twl>Pn>
public final static int QUICK = 5; *PEk+e
public final static int IMPROVED_QUICK = 6; 0@ccXFE
public final static int MERGE = 7; ]w*w@:Zk
public final static int IMPROVED_MERGE = 8; JWzN 'a R
public final static int HEAP = 9; D}YAu,<K
d'y\~M9(
public static void sort(int[] data) { KicPW}_
sort(data, IMPROVED_QUICK); 9b88):[qO
} BTi:Bcv k
private static String[] name={ "kHFt|%@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <B"M} Y>_P
}; 1j4(/A
1T96W :
private static Sort[] impl=new Sort[]{ ~m@v ~=
new InsertSort(), dB`3"aSN7
new BubbleSort(), EkWipF(
new SelectionSort(), Wg\`!T
new ShellSort(), &\[3m^L
new QuickSort(), =XbOY[
new ImprovedQuickSort(), PH$fDbC8
new MergeSort(), \r4QS
new ImprovedMergeSort(), {tqLH2cO
new HeapSort() *}\}@0%
}; #*r u*
[,_4#Zz
public static String toString(int algorithm){ b3$aPwv
return name[algorithm-1]; >M1m(u84#
} @!;EW R]
0C3s
public static void sort(int[] data, int algorithm) { B-EVo&.
impl[algorithm-1].sort(data); b d!|/Lk
} 0qND2_
k#*tf:R
public static interface Sort { >'\cNM~nf
public void sort(int[] data); mI;#Zq_j
} X0IXj%\N
?<7o\Xk#{
public static void swap(int[] data, int i, int j) { KB3zQJY
int temp = data; 5 *w a
data = data[j]; #a :W
data[j] = temp; Nhq&Sn2
} "'M>%m u
} OanHG