[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; B3]q*ERAo
} NB;8 e>8
int i1=l; noC]&4b
int i2=mid+1; E=3<F_3W
for(int cur=l;cur<=r;cur++){ YUat}-S
if(i1==mid+1) ne4hR]:
data[cur]=temp[i2++]; I8)x0)Lx
else if(i2>r) 9^<t0oY
data[cur]=temp[i1++]; S v$%-x^t
else if(temp[i1] data[cur]=temp[i1++]; *f=H#
else 1j "/}0fx
data[cur]=temp[i2++]; I1S*=^Z_U
} DDyeNuK
} L\XnTL{
/Zap'S/
} 9H$#c_zrq
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改进后的归并排序: ?`,<l#sj
>fPa>[_1
package org.rut.util.algorithm.support; 9"KEHf!
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import org.rut.util.algorithm.SortUtil; #TM+Vd$
Lf{9=;
/** /mX/ "~
* @author treeroot _$]3&P
* @since 2006-2-2 ] hGU.C"(
* @version 1.0 u;GS[E4
*/ i<l_z&
public class ImprovedMergeSort implements SortUtil.Sort { K2<"O qp_W
7,ysixY
private static final int THRESHOLD = 10; 9^,MC&eb
V)72]p
/* j BS$xW
* (non-Javadoc) Q\z6/1:9Z
* ~tWIVj{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h5e(Avk
*/ $014/IB
public void sort(int[] data) { /-)\$T1d
int[] temp=new int[data.length]; *JDQaWzBd
mergeSort(data,temp,0,data.length-1); z^j7wMQ
} f^b.~jXSR}
FCnOvF65
private void mergeSort(int[] data, int[] temp, int l, int r) { $8vZiB!"
int i, j, k; ZgK[,<2
int mid = (l + r) / 2; xr}3vJ7
if (l == r) ?zGx]?1P1<
return; dE~]%fUFy-
if ((mid - l) >= THRESHOLD) mZQW>A]iE
mergeSort(data, temp, l, mid); jT>G8}h
else byoP1F%
insertSort(data, l, mid - l + 1); v% 6uU
if ((r - mid) > THRESHOLD) 3DRJl,v
mergeSort(data, temp, mid + 1, r); UKV0xl
else YEH /22
insertSort(data, mid + 1, r - mid); p'{B|ujj6
oJb${k<3
for (i = l; i <= mid; i++) { mQdF+b1o
temp = data; \9j +ejGf
} (Ild>_Tdb`
for (j = 1; j <= r - mid; j++) { 2CcUClP$
temp[r - j + 1] = data[j + mid]; gb+iy$o-
} ICAp
int a = temp[l]; U:"X *
int b = temp[r]; D])&>
for (i = l, j = r, k = l; k <= r; k++) { blO(Th&
if (a < b) { LH/lnrN
data[k] = temp[i++]; |LhVANz
a = temp; #t N9#w[K{
} else { ZOJ<^t}
data[k] = temp[j--]; j5\z7
b = temp[j]; x7\b-EC
} ]!CMo+
} >-U'mkIH
} 3L}eFg,d
'. 5&Z
/** +~xY}
* @param data 'u@,,FFz[K
* @param l gQ90>P:
* @param i >NLG"[\
*/ rlxZ,]ul
private void insertSort(int[] data, int start, int len) { w5fVug/;P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #uTNf78X
} {txW>rZX
} kjAARW
} &:Q^j:
} )oqNQ'yZ
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堆排序： slUnB6@Q
6z`l}<q
package org.rut.util.algorithm.support; ^m0nInH
\f~m6j$D_
import org.rut.util.algorithm.SortUtil; `CpfQP&^
|wbXu:
/** Kk.a9uKI}
* @author treeroot Wo)$*?
* @since 2006-2-2 Qa`+-Wu8
* @version 1.0 U{1%ldOJ%
*/ xB5qX7*.
public class HeapSort implements SortUtil.Sort{ p>#sR4d>
Q1kZ+b&
/* (non-Javadoc) (\8IgQ{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (KG2X
*/ X$r5KJU
public void sort(int[] data) { wrP3:!=
MaxHeap h=new MaxHeap(); mVXwU](N
h.init(data); R+sv?4k
for(int i=0;i h.remove(); p1F{ v^
System.arraycopy(h.queue,1,data,0,data.length); y{>T['"@
} l,fwF ua
&{4KymB:
private static class MaxHeap{ ]@Z[/z%~04
r:{;HM+
void init(int[] data){ oYx4+xH/
this.queue=new int[data.length+1]; Ml,~@} p
for(int i=0;i queue[++size]=data; [0bp1S~
fixUp(size); ._%8H
} Jb/VITqN4
} @LSfP
B:)PUBb
private int size=0; P5Bva
G*s5GG@Z.
private int[] queue; SI`ems{1>c
g"{`g6(+
public int get() { B,V:Qs6"
return queue[1]; N)X3pWC8
} [_T6
Ly46S
public void remove() { >O]u4G!
SortUtil.swap(queue,1,size--); !w1acmo<_
fixDown(1); >//yvkZ9,
} QXI#gA =
file://fixdown q}PUwN6
private void fixDown(int k) { mX/'Fta
int j; 0g8ykGyx
while ((j = k << 1) <= size) { \B4f5L8k
if (j < size %26amp;%26amp; queue[j] j++; _<Ip0?N
if (queue[k]>queue[j]) file://不用交换 U| T}0
break; C>A} e6o
SortUtil.swap(queue,j,k); qrHCr:~
k = j; A&N$=9.N1
} GvzaLEo
} B/Js>R
private void fixUp(int k) { 7Y?59 [
while (k > 1) { _U|rTil
int j = k >> 1; Ddh
if (queue[j]>queue[k]) ?%cZO"
break; g& ou[_A
SortUtil.swap(queue,j,k); /Qu<>#[?
k = j; L,yq'>*5s
} 5{gv\S1
} -G[TlH06
lT?Vt`==~M
} XE'3p6
(%j V[Q
} A(9$!%#+L
/&Hl62Ak
SortUtil： Fs}B\R/J
(]Q0L{~K
package org.rut.util.algorithm; C%#w1k
#/"Tb^c9
import org.rut.util.algorithm.support.BubbleSort; C>Q|"Vf2
import org.rut.util.algorithm.support.HeapSort; %H[~V f?d
import org.rut.util.algorithm.support.ImprovedMergeSort; ], IQ~
import org.rut.util.algorithm.support.ImprovedQuickSort; :*M2@
import org.rut.util.algorithm.support.InsertSort; sa}.o ZpQ
import org.rut.util.algorithm.support.MergeSort; SJ}PV:x
import org.rut.util.algorithm.support.QuickSort; C).+h7{nd
import org.rut.util.algorithm.support.SelectionSort; ~OMo$qt`lP
import org.rut.util.algorithm.support.ShellSort; >u\'k+=
~\*wt(o
/** !'C8sNs
* @author treeroot aECpe'!m4
* @since 2006-2-2 $0cE iq?Hf
* @version 1.0 e= XC$Jv
*/ |hS^eK_
public class SortUtil { _1jbNQa
public final static int INSERT = 1; }tW1\@ =
public final static int BUBBLE = 2; wE-y4V e
public final static int SELECTION = 3; g)ofAG2
public final static int SHELL = 4; SmS6B5j\R
public final static int QUICK = 5; l\"CHwN?Y
public final static int IMPROVED_QUICK = 6; ?e%u[Q0
public final static int MERGE = 7; 8M0<:p/
public final static int IMPROVED_MERGE = 8; 3!h3flE
public final static int HEAP = 9; %(S!/(LWW
]|N"jr?7H
public static void sort(int[] data) { RA!8AS?
sort(data, IMPROVED_QUICK); 4av
} ^jXKM!}-E
private static String[] name={ `46|VQAx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KGf@d*ZOMz
}; k$.l^H u
{z9,CwJan?
private static Sort[] impl=new Sort[]{ I* PxQ
new InsertSort(), Uw?25+[b
new BubbleSort(), yO/'}FD
new SelectionSort(), g7w#;E
new ShellSort(), o4^#W;%w
new QuickSort(), BC85#sbl
new ImprovedQuickSort(), I-Q(kWc
new MergeSort(), L<G6)'5W
new ImprovedMergeSort(), /eBcPu"[Vb
new HeapSort() (S?qxW?
}; 'JO}6 ;W
|fb*<o eT
public static String toString(int algorithm){ *&5./WEOH
return name[algorithm-1]; uG+eF
} 1wE`kbC<
[B^V{nUBc
public static void sort(int[] data, int algorithm) { cpH*!*S
impl[algorithm-1].sort(data); Odm1;\=Eg+
} |}: D_TX
[fJxbr"
public static interface Sort { +jN)$Y3Ya
public void sort(int[] data); Bnz}:te}
} gF]IAZCi
UZL-mF:)&
public static void swap(int[] data, int i, int j) { .G}$jO}
int temp = data; vos-[$
data = data[j]; ZSB;4 ?:h
data[j] = temp; fc<,kRp
} R0yp9icS
} _$mS=G(