[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; hJb2y`,q
} ]:|B).
int i1=l; Lgg,K//g
int i2=mid+1; ;A*SuFbV
for(int cur=l;cur<=r;cur++){ 'a['lF
if(i1==mid+1) 8D='N`cN+
data[cur]=temp[i2++]; Jj"{C]
else if(i2>r) k6(7G@@}
data[cur]=temp[i1++]; P8tdT3*6/
else if(temp[i1] data[cur]=temp[i1++]; : uncOd.
else ,QY$:f<
data[cur]=temp[i2++]; +1ICX
} 1qRquY
} @rTB&>`
b(Nv`'O
} =RQF::[h
`\kihNkJn3
改进后的归并排序: |kYlh5/c d
] G&*HMtp
package org.rut.util.algorithm.support; b(iF0U>&
Yj/afn(Jt
import org.rut.util.algorithm.SortUtil; p)y5[HX
j/O~8o&
/** [FO4x`
* @author treeroot c|&3e84U
* @since 2006-2-2 -50DGA,K6
* @version 1.0 Hr|f(9xA
*/ -*C WF|<G
public class ImprovedMergeSort implements SortUtil.Sort { IOy0WHl|
D}_.D=)
private static final int THRESHOLD = 10; Nd~B$venh
s2;~FK#/
/* 1/.BP
* (non-Javadoc) *]$B 9zVs!
* U\KMeaF5e-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {213/@,
*/ NAGM3{\5v$
public void sort(int[] data) { U"PcNQy
int[] temp=new int[data.length]; (2g a:}K
mergeSort(data,temp,0,data.length-1); ;8sL
} f9.?+.^_
!J$r|IX5
private void mergeSort(int[] data, int[] temp, int l, int r) { FlqGexY5
int i, j, k; k9Pvh,_wp
int mid = (l + r) / 2; hbw(o
if (l == r) 5 ~Wg=u<6
return; rq+_[!
if ((mid - l) >= THRESHOLD) xe@1H\7:
mergeSort(data, temp, l, mid); y>I2}P
else l5[5Y6c>
insertSort(data, l, mid - l + 1); "r9Rr_, >
if ((r - mid) > THRESHOLD) w'S,{GW
mergeSort(data, temp, mid + 1, r); ;J%:DD
else $R9D L^iD
insertSort(data, mid + 1, r - mid); gjS|3ED
WR;1
for (i = l; i <= mid; i++) { HK;NR.D
temp = data; +jm,nM9
} \TQZZ_Z
for (j = 1; j <= r - mid; j++) { @-U\!Tf
temp[r - j + 1] = data[j + mid]; $%bSRvA
} l/.{F;3F
int a = temp[l]; EL 5+pt
int b = temp[r]; J<$@X JLS
for (i = l, j = r, k = l; k <= r; k++) { ARH~dN*C
if (a < b) { w0Qtr>"
data[k] = temp[i++]; ,;k+n)
a = temp; O'<V[Y}6
} else { O)'CU1vMb
data[k] = temp[j--]; A_xC@$1e<
b = temp[j]; #N|\7(#~u
} 'p@f5[t
} slQn
} c_J9CKqc
FuhmLm'p
/** 0=Z[6Q@:
* @param data rB>ge]$.
* @param l >!963>DR
* @param i &>sbsx\y
*/ As:O|!F
private void insertSort(int[] data, int start, int len) { *dl hRa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8&<mg;H,
} jK|n^5\
} e4z`:%vy
} Q6h+.
} <kh.fu@.Q
-F5BJk
堆排序： [Vd$FDki
X1j8tg
package org.rut.util.algorithm.support; {}O~tf_
P}R:o
import org.rut.util.algorithm.SortUtil; ZpTDM1ro
o!a,r3
/** ':*H#}Br-#
* @author treeroot E C#0-,z
* @since 2006-2-2 d"wA"*8~y
* @version 1.0 T{{:p\<]_
*/ 6=iHw24
public class HeapSort implements SortUtil.Sort{ .u-a+ac<
f ,F X# _4
/* (non-Javadoc) Kk3+ ]W<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p3s i\Fm!
*/ V9c.(QY|f
public void sort(int[] data) { 55Ss%$k@
MaxHeap h=new MaxHeap(); `TrWtSwv
h.init(data); 9LR=>@Z
for(int i=0;i h.remove(); i]8O?Ab>?
System.arraycopy(h.queue,1,data,0,data.length); zakhJ
} 2W AeSUX
hnj\|6L
private static class MaxHeap{ ,9&cIUH
!_fDL6a-
void init(int[] data){ ?UnQ?F(+G<
this.queue=new int[data.length+1]; Jf YgZ\#
for(int i=0;i queue[++size]=data; Kz HYh
fixUp(size); lC<;Q*Y
} 'zyw-1
} }(EH5jZ'
e3I""D{)[=
private int size=0; /jv/qk3i
J8ni}\f
private int[] queue; 4cjfn'x
P9v(5Z00|d
public int get() { F};R
return queue[1]; ;ALWL~Xm
} #QNN;&L]R
AA\a#\#Z3
public void remove() { 'l*X?ccKy
SortUtil.swap(queue,1,size--); dGKo!;7{
fixDown(1); n0(Q/
} f%G\'q]#F
file://fixdown '|8dt "C
private void fixDown(int k) { jn(x-fj6R
int j; c1YDln
while ((j = k << 1) <= size) { uwwR$ (\7
if (j < size %26amp;%26amp; queue[j] j++; [F-R*}&x
if (queue[k]>queue[j]) file://不用交换 =oAS(7o
break; `YhGd?uu$
SortUtil.swap(queue,j,k); zv]ZEWVzc
k = j; A3]A5s6
} qTsy'y;Z
} f$I=oN
private void fixUp(int k) { { I#>6
while (k > 1) { +kSu{Tc
int j = k >> 1; (_FU3ZW!
if (queue[j]>queue[k]) Be6Yh~m
break; mU5Ox4>&9
SortUtil.swap(queue,j,k); t.P@Ba^
k = j; gInh+XZs
} p-4$)w~6i
} mixsJ}e
PTe L3L
} *X0>Ru[
HTQZIm
} -WC0W
l=?e0d>O
SortUtil： (< +A w7
(Pc>D';{S
package org.rut.util.algorithm; Fh#QS'[
7l* &Fh9;
import org.rut.util.algorithm.support.BubbleSort; TgiZ % G
import org.rut.util.algorithm.support.HeapSort; 2<D| {
import org.rut.util.algorithm.support.ImprovedMergeSort; X^\D"fmE.
import org.rut.util.algorithm.support.ImprovedQuickSort; P6+ B!pY
import org.rut.util.algorithm.support.InsertSort; nI:M!j5s`
import org.rut.util.algorithm.support.MergeSort; 5(>=};r+
import org.rut.util.algorithm.support.QuickSort; ">}6i9o
import org.rut.util.algorithm.support.SelectionSort; s9Hxiw@D
import org.rut.util.algorithm.support.ShellSort; -^_2{i
/7}pReUj
/** B;k'J:-"
* @author treeroot sfF~k-
* @since 2006-2-2 ibkB>n{(
* @version 1.0 U,g8:M xHK
*/ 1 Pk+zBJ$
public class SortUtil { ~P3b5 -
public final static int INSERT = 1; A`7(i'i5]
public final static int BUBBLE = 2; hRf l\Q[
public final static int SELECTION = 3; u/=hueR<^
public final static int SHELL = 4; g p:0Y
public final static int QUICK = 5; o=rR^Z$G
public final static int IMPROVED_QUICK = 6; OZ&/&?!XE
public final static int MERGE = 7; ~$J;yo~
public final static int IMPROVED_MERGE = 8; u8-6s+ O
public final static int HEAP = 9; c p"K?)
gUklP(T=u
public static void sort(int[] data) { K(;qdIr
sort(data, IMPROVED_QUICK); pGs?Y81
} [)"\Aq
private static String[] name={ 4*XNk;Dx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E'x"EN
}; M9iX_4
#,#`<h!
private static Sort[] impl=new Sort[]{ SBxpJsW>
new InsertSort(), #pvq9fss,}
new BubbleSort(), #/oH #/?
new SelectionSort(), +ktv:d
new ShellSort(), #W~jQ5NS\
new QuickSort(), sOhn@*X
new ImprovedQuickSort(), Qs1CK;+zU
new MergeSort(), p:08q B|uQ
new ImprovedMergeSort(), Fm`*j/rq
new HeapSort() \F|)w|v
}; Skr(C5T
]IV{;{E)
public static String toString(int algorithm){ $hm[x$$
return name[algorithm-1]; QuR}6C
} cL9gaD$;)
u}du@Aq
public static void sort(int[] data, int algorithm) { H_&to3b(
impl[algorithm-1].sort(data); MG?,,8sO
} m)A:w.o
;@Zuet
public static interface Sort { <$s6?6P
public void sort(int[] data); ,p|Q/M^
} yrxX[Hg?@
Lm[,^k
public static void swap(int[] data, int i, int j) { uE1;@Dm+
int temp = data; )+N{D=YM
data = data[j]; o;@~uU
data[j] = temp; L3b0e_8>R
} (OiV IH
} }u8(7