[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; M[N.H9
} t4c#' y
int i1=l; imq(3?
int i2=mid+1; =]mx"0i[
for(int cur=l;cur<=r;cur++){ =sVt8FWGY
if(i1==mid+1) Ck a]F2,
data[cur]=temp[i2++]; c89vx 9
else if(i2>r) L;t~rW!1
data[cur]=temp[i1++]; [cAg'R6
else if(temp[i1] data[cur]=temp[i1++]; k_^/
else _5`S)G{
data[cur]=temp[i2++]; 54DR.>O
} X',0MBQ0
} q _|5,_a
?v~3zHK
} *pUV-^uo
xVX||rrh
改进后的归并排序: ^aWNtY' :
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package org.rut.util.algorithm.support; O;t?@!_
AFUl
import org.rut.util.algorithm.SortUtil; R*fR?
myX0<j3G5
/** j;'Wf[V
* @author treeroot I_s(yO4pw
* @since 2006-2-2 X[Gk!dr#
* @version 1.0 QNwAuH T
*/ r:rJv
public class ImprovedMergeSort implements SortUtil.Sort { fzG1<Gem
]H7Mx\
private static final int THRESHOLD = 10; 5kNs@FP
<5vB{)Tq
/* ;!sGfrs0$
* (non-Javadoc) r@UY$z
* M.^A`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `bF;Ew;
*/ =_6h{f&Q
public void sort(int[] data) { ?O Nw*"9
int[] temp=new int[data.length]; y.<Y]m
mergeSort(data,temp,0,data.length-1); 3m7V6##+
} )Dpt<}}\
Z-!T(:E]
private void mergeSort(int[] data, int[] temp, int l, int r) { [&s:x,
int i, j, k; ; O0rt1
int mid = (l + r) / 2; -RDs{c`y%N
if (l == r) @&yj7-]
return; ebK wCZwK*
if ((mid - l) >= THRESHOLD) agD.J)v\
mergeSort(data, temp, l, mid); MCG~{#`
else Q kpmPQK
insertSort(data, l, mid - l + 1); HN@)/5BY
if ((r - mid) > THRESHOLD) a/#,Y<kJ
mergeSort(data, temp, mid + 1, r); UH|.@7w
else BQg]$Tr?
insertSort(data, mid + 1, r - mid); gP%!
@!O{>`
for (i = l; i <= mid; i++) { Z"T(8>c;g
temp = data; .LHe*JC
} P?7b,a95O
for (j = 1; j <= r - mid; j++) { >AFpO*q"
temp[r - j + 1] = data[j + mid]; f`rz)C03
} U# B
int a = temp[l]; R/|{?:r?:x
int b = temp[r]; AE _~DZ:%c
for (i = l, j = r, k = l; k <= r; k++) { dig76D_[e
if (a < b) { ^k##a-t<_>
data[k] = temp[i++]; Jz'+@q6h
a = temp; K 5[ 3WHQ
} else { bOKNWI
data[k] = temp[j--]; giJyMd}x
b = temp[j]; RVx<2,['
} k<qH<<r*
} .CpO+z
} l/NK.Jr
XS/TYdXB8
/** s$6#3%h
* @param data |_m;@.44?U
* @param l Ka{Zoi]
* @param i 5Oq;V:7
*/ Ts6X:D4,
private void insertSort(int[] data, int start, int len) { V1;-5L75
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0n=E.qZ9c
} Gzt5efygKt
} oFp&j@`k8j
} sAlgp2-
} ztpb/9J9
k]g\` gc
堆排序： {jG`l$$
i[#Tn52D
package org.rut.util.algorithm.support; DBDfBb
jp`N%O]6
import org.rut.util.algorithm.SortUtil; `_)dEu
;0gpS y$#
/** mo$*KNW%\
* @author treeroot k>`X! "
* @since 2006-2-2 &pz8vWCk
* @version 1.0 yqwr0yDAl
*/ v g]&T
public class HeapSort implements SortUtil.Sort{ p6)UR~9Rs
p<e~x/@m*
/* (non-Javadoc) A[bxxQSP\H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _3S{n=9
*/ cpVi9]
public void sort(int[] data) { }JsdgO&z
MaxHeap h=new MaxHeap(); l!,{bOZ
h.init(data); Ls{fCi/2F
for(int i=0;i h.remove(); jFfki.H
System.arraycopy(h.queue,1,data,0,data.length); cj *4XYu
} ,YTIYG](
p2K9R4
private static class MaxHeap{ gKCIfxM
"Wp<^ssMo
void init(int[] data){ Le!I-i(aD
this.queue=new int[data.length+1]; < r~Tj
for(int i=0;i queue[++size]=data; KK6YA
fixUp(size); ?Dm&A$r
} qfU3Cwy
} }d(6N&;"zN
u@B"*V~K
private int size=0; n21J7;\/+
lTXU
private int[] queue; #UQ[8e
sh1()vT
public int get() { U|nk86r
return queue[1]; i}19$x.D`
} 8Yh2K}
f/ZE_MN2
public void remove() { f]}F_]
SortUtil.swap(queue,1,size--); 3[rB:cE/
fixDown(1); [6|vx},N
} NL 37Y{b
file://fixdown `upNP/,
private void fixDown(int k) { ks}o9[D3
int j; 51vK>
while ((j = k << 1) <= size) { :y)'qv[
if (j < size %26amp;%26amp; queue[j] j++; FcA0 \`0M
if (queue[k]>queue[j]) file://不用交换 p* @L1
break; 6_Kz}PQ
SortUtil.swap(queue,j,k); q}jf&xUWzH
k = j; $((<le5-)
} ZE^de(Fm
} p98lu'?@
private void fixUp(int k) { & \m\QI
while (k > 1) { UL/>t}AG
int j = k >> 1; P7b2I=t
if (queue[j]>queue[k]) ,o)MiR9-[A
break; ,n*.Yq
SortUtil.swap(queue,j,k); 5kF5`5+Vj
k = j; >@"j9
} !NCT) #G`
} M<"D!h9YP
l- l}xBf
} B.?yHaMI[
iJi|*P5dw
} m_B5M0},
vF,l?cU~
SortUtil： ( nh!tC
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package org.rut.util.algorithm; T*IudxW
i,'~Ds
import org.rut.util.algorithm.support.BubbleSort; yrjm0BM#
import org.rut.util.algorithm.support.HeapSort; ;%1^k/b6t
import org.rut.util.algorithm.support.ImprovedMergeSort; .<.qRq-
import org.rut.util.algorithm.support.ImprovedQuickSort; pqe**`z@y
import org.rut.util.algorithm.support.InsertSort; "hfwj`U
import org.rut.util.algorithm.support.MergeSort; I9E@2[=!
import org.rut.util.algorithm.support.QuickSort; RA6D dqT~
import org.rut.util.algorithm.support.SelectionSort; C\{4<:<_&
import org.rut.util.algorithm.support.ShellSort; !cZsIcIe
89paR[
/** ZZTV >:
* @author treeroot Lh}he:k+
* @since 2006-2-2 wb}tN7~Y;
* @version 1.0 9YJb~tuZ73
*/ b%kh:NV{S
public class SortUtil { 181P;R=}<
public final static int INSERT = 1; t`AD9 H"\!
public final static int BUBBLE = 2; N]duv~JS
public final static int SELECTION = 3; 1jL?z6S
public final static int SHELL = 4; g_=Q=y@,
public final static int QUICK = 5; ^.(]i\V_
public final static int IMPROVED_QUICK = 6; "a: ;
public final static int MERGE = 7; $?\],T
public final static int IMPROVED_MERGE = 8; J0#% *B
public final static int HEAP = 9; ^tah4QmUA
zE[c$KPP
public static void sort(int[] data) { N(9'U0z
sort(data, IMPROVED_QUICK); k2=uP8
} mT.F$Y9
private static String[] name={ B$bsh.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h2q]!01XP
}; \o^+'4hq<5
%;<FfS
private static Sort[] impl=new Sort[]{ ?o4&cCFOE
new InsertSort(), '/j`j>'!^
new BubbleSort(), G>,rf ]N
new SelectionSort(), 3t,SXI@
new ShellSort(), ?d%_o@
new QuickSort(), 2d._X$fx7
new ImprovedQuickSort(), [ACYd/
new MergeSort(), G2Apm`/ y
new ImprovedMergeSort(), aQ)9<LsI
new HeapSort() `drvu?F
}; uk1IT4+
C.@zVt
public static String toString(int algorithm){ lY1m%
return name[algorithm-1]; oqj3Q 1
} C?B7xK
IOA{lN6
public static void sort(int[] data, int algorithm) { ri:fo'4TO
impl[algorithm-1].sort(data); |9y&;3
} ~ e"^-x
NlKnMgt~
public static interface Sort { T>c;q%A/
public void sort(int[] data); sLTf).xh
} WDZEnauE
.Ybm27Dk
public static void swap(int[] data, int i, int j) { F kWJB>
int temp = data; ^I0SfZ'Y
data = data[j]; xWDwg@ P
data[j] = temp; ?*T`a oB
} +z4NxR
} EU+sTe>