[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; r~I.F!{
} TV? ^c?{5
int i1=l; n:F@gZd`
int i2=mid+1; $,!hD\a
for(int cur=l;cur<=r;cur++){ p#)e:/Qy
if(i1==mid+1) ,Ak ^nX
data[cur]=temp[i2++]; tzZ|S<e6=\
else if(i2>r) 6!@0VI&P
data[cur]=temp[i1++]; tAaYL \~
else if(temp[i1] data[cur]=temp[i1++]; *8/VSs
else JL@F~U9
data[cur]=temp[i2++]; v<j2L"bj
} W^wd ([
} 6ezcS}:+
~'(9?81d
} sb'lZFSP~s
sbzeY1
改进后的归并排序: Yi[4DfA
.a {QA
package org.rut.util.algorithm.support; H%FM
^Wf S\M`
import org.rut.util.algorithm.SortUtil; ZHz^S)o\[s
YRXK@'[=
/** \{lE0j7}h
* @author treeroot hX&-/fF+f
* @since 2006-2-2 !`Le`c
* @version 1.0 CK=ARh#|
*/ Vfb<o"BQk
public class ImprovedMergeSort implements SortUtil.Sort { @?m+Z"o|z
`nKJR'QC
private static final int THRESHOLD = 10; D$ej+s7
OqtQA#uL
/* )q^(T1
* (non-Javadoc) k/U>N|5
* R!9qQn?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3zbXAR*
*/ -W9gH
public void sort(int[] data) { 9g96 d-
int[] temp=new int[data.length]; m.!wsw
mergeSort(data,temp,0,data.length-1); jBS'g{y-!
} Ny]lvgu9X
r-*l1([eW
private void mergeSort(int[] data, int[] temp, int l, int r) { |"_)zQ
int i, j, k; )t5;d
int mid = (l + r) / 2; >n(F4C-pl
if (l == r) TFYw
return; t]4!{~,
if ((mid - l) >= THRESHOLD) J, r Xx:
mergeSort(data, temp, l, mid); 1}`2\3,
else rJX\6{V!_
insertSort(data, l, mid - l + 1); !F-sA: xq
if ((r - mid) > THRESHOLD) _;#9!"&
mergeSort(data, temp, mid + 1, r); 2av*o~|J*:
else Zct!/u9 Q
insertSort(data, mid + 1, r - mid); z1#oWf{*
,^HS`!s[ E
for (i = l; i <= mid; i++) { (N7O+3+G
temp = data; ve6x/ PD
} SijS5irfk
for (j = 1; j <= r - mid; j++) { 4Q$!c{Y r
temp[r - j + 1] = data[j + mid]; gXF.on4B
} |J\,F.{'
int a = temp[l]; /;7ID41
int b = temp[r]; ]?M)NRk%S
for (i = l, j = r, k = l; k <= r; k++) { .5]{M\aA
if (a < b) { 4'` C1a
data[k] = temp[i++]; X'jr|s^s
a = temp; {-J:4*`
} else { ,b4g.CV
data[k] = temp[j--]; 72u db^
b = temp[j]; :1*zr
} zx7#)*
} xvdY 8%S
} dt<~sOT3s
-nOq\RYV
/** ] ;&"1A
* @param data ZOC#i i`:
* @param l F'rt>YvF
* @param i T30Zk*V
*/ RvR:e|
private void insertSort(int[] data, int start, int len) { d[S#Duz<&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %Sul4: D#
} Nkx0CG*
} 'Wtf>`
} I ld7}R
} g1ytT%]
,&[7u9@
堆排序： CB6o$U
TqAtcAurM
package org.rut.util.algorithm.support; (U_wp's
]H>+m 9
import org.rut.util.algorithm.SortUtil; h mds(lv7
SYeE) mI
/** `2,a(Sk#
* @author treeroot LZ4xfB(
* @since 2006-2-2 8'\~%xw
* @version 1.0 5=Suj*s{D#
*/ y~dB5/
public class HeapSort implements SortUtil.Sort{ 8ZW?|-i
zWb-pF|
/* (non-Javadoc) JdO)YlM-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :pb67Al29
*/ ;$z7[+M
public void sort(int[] data) { /z#F,NB
MaxHeap h=new MaxHeap(); :6zC4Sr^
h.init(data); =},{8fZ4
for(int i=0;i h.remove(); >K5~:mx#3
System.arraycopy(h.queue,1,data,0,data.length); w2C&%Xk
} Y+@g~TE
_;7fraqX
private static class MaxHeap{ |_, /u_
0 7\02f
void init(int[] data){ ><K!~pst}
this.queue=new int[data.length+1]; ]Z/R!y?l"G
for(int i=0;i queue[++size]=data; "9ue76
fixUp(size); @+:4J_N
} /'\;8A$J`
} %Ci^*zb
d@Q][7
private int size=0; r^Y~mq
Ok*Z
private int[] queue; >T QZk4$
HitAc8
public int get() { 4#7Umj
return queue[1]; 9qre|AA
} v&r=-}z2!
u1N1n;#
public void remove() { ^aHh{BQ%
SortUtil.swap(queue,1,size--); M%|f+u&
fixDown(1); p/3BD&6
} V~[:*WOX
file://fixdown L1{T ?aII
private void fixDown(int k) { aHC%19UN
int j; 9T?64t<Ju
while ((j = k << 1) <= size) { 5uttv:@=
if (j < size %26amp;%26amp; queue[j] j++; 'bPk'pj9
if (queue[k]>queue[j]) file://不用交换 V_f`0\[x
break; =hGJAU
SortUtil.swap(queue,j,k); '#<> "|
k = j; Y&g&n o_
} drIK(u\_
} l2s{~IC
private void fixUp(int k) { pC^2Rzf
while (k > 1) { ssA7Dx:
int j = k >> 1; l])Q.m
if (queue[j]>queue[k]) n/AW?'
break; e3g_At\
SortUtil.swap(queue,j,k); tt{`\1q
k = j; FT(iX`YQ
} ZV( w
} EHhd;,;O
sUbFRq
} }[v~&
2( _=SfQ
} -njQc:4W,-
;ctU&`
SortUtil： ;cLUnsB\
6__K#r
package org.rut.util.algorithm; b2s~%}T
s7"i.A
import org.rut.util.algorithm.support.BubbleSort; Z/7dg-$?'0
import org.rut.util.algorithm.support.HeapSort; I="oxf#q
import org.rut.util.algorithm.support.ImprovedMergeSort; a_{6Qdl
import org.rut.util.algorithm.support.ImprovedQuickSort; 1eD.:_t4
import org.rut.util.algorithm.support.InsertSort; :<%vE!$
import org.rut.util.algorithm.support.MergeSort; mW +tV1XjG
import org.rut.util.algorithm.support.QuickSort; .8(%4ejJ(
import org.rut.util.algorithm.support.SelectionSort; ;UpJ=?W
import org.rut.util.algorithm.support.ShellSort; ^yJ:+m;6K
vI|As+`$d
/** ESv:1o`?n
* @author treeroot L/fRF"V
* @since 2006-2-2 VaJfD1zd1
* @version 1.0 Q;wB{vr$
*/ 'F7VM?HBfg
public class SortUtil { %t[K36,p
public final static int INSERT = 1; )$_,?*fq:
public final static int BUBBLE = 2; 8&."uEOOU
public final static int SELECTION = 3; Dft%ip2
public final static int SHELL = 4; uw"*zBxl
public final static int QUICK = 5; k!owl+a
public final static int IMPROVED_QUICK = 6; ;{Jb6'K1h
public final static int MERGE = 7; ^mfjn-=3
public final static int IMPROVED_MERGE = 8; gl "_:atW
public final static int HEAP = 9; " '[hr$h3
}dKLMNqPA
public static void sort(int[] data) { $:;%bjSI
sort(data, IMPROVED_QUICK); l[*sHi
} rN#\AN
private static String[] name={ no|Gq>Xp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TY6 rwU
}; +NR n0 z(
*<q4S(l
private static Sort[] impl=new Sort[]{ ]| WA#8_|
new InsertSort(), ]EN&SWh
new BubbleSort(), $20s]ywS
new SelectionSort(), ~-<:+9m
new ShellSort(), EY$?^iS
new QuickSort(), KTv4< c]
new ImprovedQuickSort(), s#P:6]Ar
new MergeSort(), sUciFAb
new ImprovedMergeSort(), 'hIU_
new HeapSort() tT-=hDw
}; 9|3o<
Z Xb}R^O-
public static String toString(int algorithm){ Y|RdzCM
return name[algorithm-1]; A{(T'/~"
} 41}/w3Z4
DxfMqH[vs
public static void sort(int[] data, int algorithm) { ls @5^g
impl[algorithm-1].sort(data); !FP"M+
} De]^&qw(
?!7 SzLll
public static interface Sort { c,$mWTC
public void sort(int[] data); WjOH/$(
} choL%g}
G#lg|# -#
public static void swap(int[] data, int i, int j) { [+Un ^gD
int temp = data; o(Kcs-W2
data = data[j]; 9-93aC.|}
data[j] = temp; Ux_<d?p
} >[Rz <yv
} VDa|U9N