[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; @xbQYe%J
} GM3f-\/
int i1=l; ~ ip,Nl
int i2=mid+1; T(t+ iv
for(int cur=l;cur<=r;cur++){ |QU <e
if(i1==mid+1) >N]7IU[-
data[cur]=temp[i2++]; *Eo?k<:zPm
else if(i2>r) /Y'Vh^9/T
data[cur]=temp[i1++]; %KmiH ;U
else if(temp[i1] data[cur]=temp[i1++]; ~C>?W[Y
else OU8Lldt
data[cur]=temp[i2++]; qMLD)rL
} gREzZ+([
} 7T1=q{#M
ch0{+g&
} CaL\fZ
pov)Z):}G<
改进后的归并排序: @>p<3_Y1
{buo^kgj`]
package org.rut.util.algorithm.support; .w0s%T,8}^
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import org.rut.util.algorithm.SortUtil; ;\=M;Zt
ptU\[Tq
/** /(iFcMT
* @author treeroot UPG9)aF
* @since 2006-2-2 1(|'WyD
* @version 1.0 8xccp4
*/ H[S%J3JI
public class ImprovedMergeSort implements SortUtil.Sort { b)=[1g/=L
%O!v"Xh
private static final int THRESHOLD = 10; ;4.!H,d
Bh;7C@dq
/* zmSUw}-4N
* (non-Javadoc) Q0&H#xgt
* :TJv=T'p'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~v6OsH%vx
*/ r\/9X}y4z
public void sort(int[] data) { . r[Hu40p
int[] temp=new int[data.length]; A'jP7P
mergeSort(data,temp,0,data.length-1); "4uS3h2r
} 0@H|n^Md#
LIZRoG8
private void mergeSort(int[] data, int[] temp, int l, int r) { cm&I* 0\
int i, j, k; 9J9)AV
int mid = (l + r) / 2; *#tJM.Z
if (l == r) o1FF"tLkN
return; *Df,Ijh$
if ((mid - l) >= THRESHOLD) j(RWO
mergeSort(data, temp, l, mid); HN&Z2v
else "CUty"R8
insertSort(data, l, mid - l + 1); }>VG~u8
if ((r - mid) > THRESHOLD) v?& -xH-S
mergeSort(data, temp, mid + 1, r); *:L?#Bw
else +eFFSt
insertSort(data, mid + 1, r - mid); PDrZY.-
?q;Fp
for (i = l; i <= mid; i++) { <xgTS[k
temp = data; iy14mh\ ~
} Y6Lf@}2(i
for (j = 1; j <= r - mid; j++) { (&+kl q
temp[r - j + 1] = data[j + mid]; .)<(Oj|4
} ~:3QBMk::
int a = temp[l]; * v75O7l
int b = temp[r]; N1|$$9G+
for (i = l, j = r, k = l; k <= r; k++) { JWMpPzs
if (a < b) { b#K:_ac5
data[k] = temp[i++]; '+$EhFwD
a = temp; Vzwc}k*Y
} else { >|twyb
data[k] = temp[j--]; =u+d_'P7-R
b = temp[j]; ,:Lb7bFv>
} {3.r6ZwCn
} Ee3hG2d`
} V\^EfQ
K00 87}H
/** 4Qo]nre!
* @param data QoG cWJ
* @param l gMaN)ESqd4
* @param i il \$@Bn
*/ nSkPM5\TI
private void insertSort(int[] data, int start, int len) { !kE-_dY6)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aEWWFN
} ]Yvga!S"C
} qt;y2gf=
} "Q?k'^@
} ^",ACWF4Sk
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堆排序： UGuxV+Nwf
hWT[L.>k
package org.rut.util.algorithm.support; j'BMAn ?
Hv\-_>}K
import org.rut.util.algorithm.SortUtil; Q~j`YmR|
]- 4QNc=
/** \@1=stK:F
* @author treeroot JGH60|
* @since 2006-2-2 6+KHQFb&N
* @version 1.0 q7-L53.x
*/ stk9Ah
public class HeapSort implements SortUtil.Sort{ K%X^n>O7C
%B)6$!x
/* (non-Javadoc) zBJ7(zh!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LJ(1RK GCz
*/ C,pJ`:P
public void sort(int[] data) { Wxbq)Z[V
MaxHeap h=new MaxHeap(); hwIMn33
h.init(data); I~9hx*!%%
for(int i=0;i h.remove(); rJ!{/3e
System.arraycopy(h.queue,1,data,0,data.length); BZXUwqEh
} ;XDz)`c
't9hXzAfW
private static class MaxHeap{ W!"}E%zx
HCa
void init(int[] data){ pIKSs<IP
this.queue=new int[data.length+1]; XFh>U7z.
for(int i=0;i queue[++size]=data; fz3lV
fixUp(size); |-CnT:|o
} lZrVY+D
} Zb134b'
`St.+6^J
private int size=0; LT,?$I
+\{&2a?
private int[] queue; =07]z@s
cn- nj]
public int get() { gt7VxZ
return queue[1]; j$7Xs"
} fVM`-8ZTq
q9^
public void remove() { A;O~#Chvd
SortUtil.swap(queue,1,size--); ZDC9oX @
fixDown(1); !2|=PB' M
} $L2%u8}8:
file://fixdown 2]c{P\
private void fixDown(int k) { u^j {U}
int j; V`-vR2(
while ((j = k << 1) <= size) { nWvuaQ0}
if (j < size %26amp;%26amp; queue[j] j++; Bs MuQ|!
if (queue[k]>queue[j]) file://不用交换 ne>g?"Pex{
break; 7'-j%!#w
SortUtil.swap(queue,j,k); Jy aag-
k = j; &l?+3$q
} z 8*8OWM
} 3F#+~^2
private void fixUp(int k) { a@pz*e
while (k > 1) { "z*:'8;E
int j = k >> 1; QQpP#F|w
if (queue[j]>queue[k]) m"9XT)N
break; 34QfgMyH
SortUtil.swap(queue,j,k); j2Pn<0U
k = j; X{g%kf,D=
} /V?H4z[G
} NA.1QQ;e
e\b`n}nC
} {R^'=(YFy
c:l]=O
} yxBUj*3
1KYN>s:
SortUtil： M]-VHI[&W
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package org.rut.util.algorithm; Fn^C{p^
s(_+!d6
import org.rut.util.algorithm.support.BubbleSort; w^1Fi8+
import org.rut.util.algorithm.support.HeapSort; <fdPLw;@e4
import org.rut.util.algorithm.support.ImprovedMergeSort; I@l>w._.
import org.rut.util.algorithm.support.ImprovedQuickSort; GPWr>B.{:S
import org.rut.util.algorithm.support.InsertSort; fB+b}aoV
import org.rut.util.algorithm.support.MergeSort; jFerYv&K~
import org.rut.util.algorithm.support.QuickSort; I|/'Ds:
import org.rut.util.algorithm.support.SelectionSort; p[WX'M0f
import org.rut.util.algorithm.support.ShellSort; * \HRw +cL
A{<xc[w;p
/** zx1:`K0bi
* @author treeroot vRPS4@9'
* @since 2006-2-2 }xlKonk
* @version 1.0 9zgNjjCl]
*/ <1&Ke
public class SortUtil { CDp8)=WJFF
public final static int INSERT = 1; Zwe[_z!*D
public final static int BUBBLE = 2; 9YF$CXonE=
public final static int SELECTION = 3; *T4<&
public final static int SHELL = 4; +ySY>`1k~
public final static int QUICK = 5; Pj7gGf6v
public final static int IMPROVED_QUICK = 6; W>spz~w%j
public final static int MERGE = 7; uG>nV
public final static int IMPROVED_MERGE = 8; v&3O&y/1v
public final static int HEAP = 9; Qrz4}0
J<JBdk
public static void sort(int[] data) { oj}"H>tTp
sort(data, IMPROVED_QUICK); |)@N-f:E
} F?Or;p5`Y
private static String[] name={ he)ulB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9e<Zgr?N
}; wAbp3hX
ke/_k/
private static Sort[] impl=new Sort[]{ iilyw_$H
new InsertSort(), c!&Qj
new BubbleSort(), 2w?G.pO#
new SelectionSort(), bdV3v`
new ShellSort(), .#^0pv!
new QuickSort(), OoP@-D"e
new ImprovedQuickSort(), '=} Y2?(
new MergeSort(), 0^]t"z5f0
new ImprovedMergeSort(), FsCwF&/q
new HeapSort() =LZ>su
}; Jm![W8L
L2Ux9_S
public static String toString(int algorithm){ 0->/`/xm
return name[algorithm-1]; wL<j:>Ke[3
} 6tOi^+qN
;]&-MFv#
public static void sort(int[] data, int algorithm) { 8wiA
impl[algorithm-1].sort(data); B-Y+F
} Kp_jy.e7&
9YSVK\2$
public static interface Sort { ZBj6KqfST%
public void sort(int[] data); ,L-C(j
} + x_wYv
`I>], J/
public static void swap(int[] data, int i, int j) { \o9@[t>&2
int temp = data; u~71l)LA
data = data[j]; E:Y:X~vy
data[j] = temp; spiDm:Xe
} Q=.g1$LP
} }W "(cYN_