[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; v,{ :Ez(H
} :vqgGKml$
int i1=l; bL+_j}{:N
int i2=mid+1; f<fXsSv(
for(int cur=l;cur<=r;cur++){ l\!fj#
if(i1==mid+1) mCsMqDH
data[cur]=temp[i2++]; .*?wF
else if(i2>r) )D5"ap]fX
data[cur]=temp[i1++]; ):68%,
else if(temp[i1] data[cur]=temp[i1++]; vzs)[AD
else 8f)?{AX0
data[cur]=temp[i2++]; Fg5kX
} 0$)>D==
} *ebSq)
HU8900k+
} n,V[eW#m'L
c"n\cNP<
改进后的归并排序: M4oy
r?lf($D*
package org.rut.util.algorithm.support; "fCu=@i
p;59?
import org.rut.util.algorithm.SortUtil; y^,1a[U.
R'bTN|Cq
/** +\c5]`
* @author treeroot ^T;*M_
* @since 2006-2-2 ?FeYN+qR
* @version 1.0 G%AbC"
*/ \378rQU
public class ImprovedMergeSort implements SortUtil.Sort { 0w\zLU
7Oa#c<2]
private static final int THRESHOLD = 10; vMi;+6'n>
'EEJU/"u
/* "$Z= %.3Q
* (non-Javadoc) Vod\a5c
* dGYn4i2k?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ustv{:7v
*/ 4$iz4U:P
public void sort(int[] data) { uk<4+x,2)
int[] temp=new int[data.length]; 8 S:w7Hr
mergeSort(data,temp,0,data.length-1); Pmr5S4Ka
} 6S'yZQ|b
?wiCQ6*$
private void mergeSort(int[] data, int[] temp, int l, int r) { |+FubYf?$
int i, j, k; ~q@|l3?$
int mid = (l + r) / 2; 3LJ+v5T~
if (l == r) MSQEO4ge
return; g:'xae/]S
if ((mid - l) >= THRESHOLD) 3nIU1e
mergeSort(data, temp, l, mid); uy[At+%zg
else \=?a/
insertSort(data, l, mid - l + 1); fNli
if ((r - mid) > THRESHOLD) Xtq_y'I
mergeSort(data, temp, mid + 1, r); l6T-}h:=
else pXT4)JDpc
insertSort(data, mid + 1, r - mid); )BZ.Sv
B4c]}r+
for (i = l; i <= mid; i++) { =w_Ype`
temp = data; RE7?KR>
} t9kzw*U9
for (j = 1; j <= r - mid; j++) { ';w#w<yaI
temp[r - j + 1] = data[j + mid]; b,l$1{
} 25nt14Y0u
int a = temp[l]; <y2U3;t
int b = temp[r]; (^8Y|:Tz
for (i = l, j = r, k = l; k <= r; k++) { ~drS} V
if (a < b) { P_dCR
data[k] = temp[i++]; u<7/0;D#+
a = temp; }l(&}#dY
} else { Gv!2f
data[k] = temp[j--]; 6"LcJ%o
b = temp[j]; U2tV4_ e
} x*/tyZg6
} \+oQd=K@
} 7{e 4c
r_)' Ps
/** P%V'4pc
* @param data k_L7 kvpt
* @param l ~RW+GTe
* @param i |B?m,U$A!
*/ X:f UI4
private void insertSort(int[] data, int start, int len) { h0*!;Z7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u:6Ic)7'
} 59LZv-l
} )al]*[lY
} VZp5)-!\
} 9tU]`f
''A_[J `>
堆排序： 2@n{yYwy
[`#CXq'
package org.rut.util.algorithm.support; @wGPqg
SB;&GHq"n
import org.rut.util.algorithm.SortUtil; G, }Yl
!fV+z%:
/** Avge eJi
* @author treeroot j"t(0m
* @since 2006-2-2 WrnrFz
* @version 1.0 ^H p; .f.
*/ @N>\|!1CC
public class HeapSort implements SortUtil.Sort{ 4qb/daE:Z
SXSgld2uS
/* (non-Javadoc) I13y6= d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a=|K%ii+Y
*/ j2t7'bO_
public void sort(int[] data) { e@L=LW>
MaxHeap h=new MaxHeap(); @+&LYy72
h.init(data); x77*c._3v
for(int i=0;i h.remove(); !{+,B5 Hc
System.arraycopy(h.queue,1,data,0,data.length); t>L2
} QGMV}y
JinUV6cr
private static class MaxHeap{ \0^Kram>
$P >
void init(int[] data){ A6
this.queue=new int[data.length+1]; E+j/Cu
for(int i=0;i queue[++size]=data; !4ocZmj\
fixUp(size); KaLzg5is
} q\9JgD)
} F#3Q_G^/
+r�
private int size=0; SpIv#?
<v"R.<
private int[] queue; z{%<<pZ
k90YV(
public int get() { W-$Z(Z XL
return queue[1]; ")1:F>
} *l(7D(#
WJ]T\DI
public void remove() { *[Imn\hu
SortUtil.swap(queue,1,size--); `Y0%cXi3
fixDown(1); R)?*N@.s
} ,5P0S0*{
file://fixdown [CTnXb
private void fixDown(int k) { /m!BY}4W
int j; B5,N7z34F
while ((j = k << 1) <= size) { <X#C)-.
if (j < size %26amp;%26amp; queue[j] j++; ^7`BP%6
if (queue[k]>queue[j]) file://不用交换 [>vLf2OID
break; ~V:\ _{mE
SortUtil.swap(queue,j,k); N_LM/of|D
k = j; IY1//9
} 8$]1M,$r
} :^<3>zk
private void fixUp(int k) { Q8$}@iA[
while (k > 1) { "-E\[@/
int j = k >> 1; &.F4b~A7
if (queue[j]>queue[k]) SjK
break; 8:q1~`?5"b
SortUtil.swap(queue,j,k); oe ~'o'
k = j; 3RUy,s
} f'F?MINJP
} +Z,;,5'5G
[XN={
} m%0p\Y-/
I<DL=V
} 7:e{;iG
b8H{8{wi|
SortUtil： 5G}?fSQ>
M^A48u{,"
package org.rut.util.algorithm; E[OJ+ ;c
gZVc 5u<
import org.rut.util.algorithm.support.BubbleSort; 9FF0%*tGo
import org.rut.util.algorithm.support.HeapSort; 2V]UJ<
import org.rut.util.algorithm.support.ImprovedMergeSort; #j;^\rSv-
import org.rut.util.algorithm.support.ImprovedQuickSort; &Hrj3E
import org.rut.util.algorithm.support.InsertSort; eB2a-,
import org.rut.util.algorithm.support.MergeSort; %q"%AauJR
import org.rut.util.algorithm.support.QuickSort; D2#ZpFp"h
import org.rut.util.algorithm.support.SelectionSort; V(}:=eK
import org.rut.util.algorithm.support.ShellSort; pG_;$8Hc
k``_EiV4t
/** yER(6V'\iQ
* @author treeroot y4yhF8E>;U
* @since 2006-2-2 ^"E^zHM(
* @version 1.0 L]7=?vN=8
*/ />C^WQI^
public class SortUtil { +8T?{K
public final static int INSERT = 1; rDtY[
public final static int BUBBLE = 2; K&u_R
public final static int SELECTION = 3; cUk7i`M;6
public final static int SHELL = 4; `Uq#W+r,
public final static int QUICK = 5; vN}#Kc\
public final static int IMPROVED_QUICK = 6; b\f O8{k
public final static int MERGE = 7; #x@$lc=k3
public final static int IMPROVED_MERGE = 8; eNh39er
public final static int HEAP = 9; ^+ml5m
t6rRU~;}
public static void sort(int[] data) { cs48*+m
sort(data, IMPROVED_QUICK); _r#Z}HK
} qyb?49I
private static String[] name={ H;mSkRD3N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VD AaYDi
}; "37lx;CH
_=r6=.
private static Sort[] impl=new Sort[]{ /*~EO{o
new InsertSort(), $B+8Of
new BubbleSort(), PJ')R:e,
new SelectionSort(), |*Yr<zt
new ShellSort(), ME$[=?7XX
new QuickSort(), Xc++b|k
new ImprovedQuickSort(), +:2klJ
new MergeSort(), l03B=$
new ImprovedMergeSort(), 2F[ q).
new HeapSort() hwuiu*
}; ]Ee?6]bN
VO5#Qgen
public static String toString(int algorithm){ ^^u5*n+5
return name[algorithm-1]; y G~?MEh{
} _{ue8kGt
,O5NLg-
public static void sort(int[] data, int algorithm) { ~i= _J3'
impl[algorithm-1].sort(data); I@\lN&HC
} BkAm/R
pp?D7S
public static interface Sort { m[osg< CR_
public void sort(int[] data); TvoyZW\?w
} >-?f0K
=>S]q71
public static void swap(int[] data, int i, int j) { 5PCqYN(:B
int temp = data; `?H]h"{7Q
data = data[j]; :9afg
data[j] = temp; (M|Dx\_
} =HK!(C
} J`Q>3]wL