[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; &O(z|-&| x
} '.oEyZA;o
int i1=l; uY5&93R
int i2=mid+1; FLY#
for(int cur=l;cur<=r;cur++){ [Fe`}F}Co8
if(i1==mid+1) waXA%u50
data[cur]=temp[i2++]; _I+#K M
else if(i2>r) +r9:n(VP
data[cur]=temp[i1++]; p_=^E*J]
else if(temp[i1] data[cur]=temp[i1++]; ptGM'
else |/zE(ePc{
data[cur]=temp[i2++]; Q~]#x![u0
} mY2Ubn*
} XbYW,a@w2
gPY2Bnw;l
} D52ELr7
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改进后的归并排序: ro7\}O:I
oUR'gc :
package org.rut.util.algorithm.support; (Ac '}O
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import org.rut.util.algorithm.SortUtil; o <8L,u(U
$zq`hI!1
/** 9)s=%dL
* @author treeroot MsCY5g
* @since 2006-2-2 R1/)Yy
* @version 1.0 -gH1`*YL
*/ %1a\"F![
public class ImprovedMergeSort implements SortUtil.Sort { hf>JW[>Xo
U$6N-q
private static final int THRESHOLD = 10; w<N[K>
mZJ"e,AY
/* hT9fqH
* (non-Javadoc) fLAOA9
* c3]ZU^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D_D<N(O
*/ X'e@(I!0
public void sort(int[] data) { 1Ah
int[] temp=new int[data.length]; )#Ea~>v
mergeSort(data,temp,0,data.length-1); G$:T!
} ` :Am#"j]}
Z ) qc-~S
private void mergeSort(int[] data, int[] temp, int l, int r) { eiI}:5~ /g
int i, j, k; #A@*k}/+
int mid = (l + r) / 2; "n:z("Q*
if (l == r) >}GtmnF
return; vL{sk|2&
if ((mid - l) >= THRESHOLD) X*1vIs;[@
mergeSort(data, temp, l, mid); G%-[vk#]
else >y"V%
insertSort(data, l, mid - l + 1); BftW<1,U^
if ((r - mid) > THRESHOLD) 0Jz'9
mergeSort(data, temp, mid + 1, r); ` *x;&.&v
else `Q^G k{9P
insertSort(data, mid + 1, r - mid); >%x7-->IB
] 7_ f'M1F
for (i = l; i <= mid; i++) { "zJ1vIZY
temp = data; _/MHi-]/.
} 8-UlbO6
for (j = 1; j <= r - mid; j++) { ZJ'#XZpr
temp[r - j + 1] = data[j + mid]; Eic/#j{4
} ko*Ir@SDv
int a = temp[l]; U-#wFc2N
int b = temp[r]; I0.{OJ-
for (i = l, j = r, k = l; k <= r; k++) { SaMg)s~B
if (a < b) { Ly/"da
data[k] = temp[i++]; nJY#d;
a = temp; 7"wr8
} else { F]@vmzr
data[k] = temp[j--]; :w:hqe|_
b = temp[j]; W'eF | hu
} %fnL
} 6%~ Z^>`N
} q3TAWNzI0
3qE2mYK
/** s6%%/|
* @param data l_5]~N
* @param l *=mtt^yZ
* @param i 8-3]Bm!
*/ 9^QiFgJy
private void insertSort(int[] data, int start, int len) { iyAeR!`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9'faH
} @v\Osp t=
} `WGT`A"
} x hBlv
} ,<0R'R
XT> u/Z)
堆排序： !E8y!|7$
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package org.rut.util.algorithm.support; A}?n.MAX>
zs:OHEZw
import org.rut.util.algorithm.SortUtil; :{bvCos<)
#mLF6"A
/** u6Fm qK]Dj
* @author treeroot W0J d2*]
* @since 2006-2-2 XdjM/hB{fD
* @version 1.0 MdmS
*/ {.qeVE{
public class HeapSort implements SortUtil.Sort{ 5P-7"g ca
<]xGd!x$
/* (non-Javadoc) _>+!&_h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q@8Jc[\d
*/ N]udZhkn
public void sort(int[] data) { AE? 0UVI
MaxHeap h=new MaxHeap(); N}Q%y(O^
h.init(data); 0Am&:kX't
for(int i=0;i h.remove(); uP2e/a
System.arraycopy(h.queue,1,data,0,data.length); dU<\FW_
} jcD_<WSe
~x^E kE
private static class MaxHeap{ N^z4I,GV(
kN_ i0~y@-
void init(int[] data){ 8Yc'4v#}
this.queue=new int[data.length+1]; 1Kszpt(Ld
for(int i=0;i queue[++size]=data; d"o5uo
fixUp(size); q{~59{Fha
} kKL'rT6z
} yIy'"BCxM
^=`7]E[p
private int size=0; 1=:=zyEEo
l{<+V)
private int[] queue; 7.mY@
CAg~K[
public int get() { k8IhQ{@
return queue[1]; sh;DCd
} Tq{+9+
dZ}gf}.v
public void remove() { `Cq&;-u
SortUtil.swap(queue,1,size--); 9'+Eu)l:
fixDown(1); "g27|e?y
} zGgPW
file://fixdown -!i1xR(;h
private void fixDown(int k) { HR'sMu3
int j; Pt< JF
while ((j = k << 1) <= size) { PJ}d-
if (j < size %26amp;%26amp; queue[j] j++; 8p D$/
if (queue[k]>queue[j]) file://不用交换 `t[b0; 'OH
break; 0x BO5[w,Y
SortUtil.swap(queue,j,k); -#@l`kt
k = j; Z 0&=Lw
} hK^(Y
} z5.Uv/n\1
private void fixUp(int k) { v2eLH:6
while (k > 1) { ov;1=M~RF
int j = k >> 1; mD@*vq
if (queue[j]>queue[k]) r{\c.\
break; R(p`H}^
SortUtil.swap(queue,j,k); I<E~=
k = j; ;IyA"C(i
} En!X}Owh
} }@6Tcn1
D!7-(3R
} 6[+@#IWx
@7S* ]
} qFQO1"mu
bmCp:6
SortUtil： m8[XA!,
xf2|9Tqt
package org.rut.util.algorithm; FgwIOpqE*
$[f-{B{>*
import org.rut.util.algorithm.support.BubbleSort; 7slpj8
import org.rut.util.algorithm.support.HeapSort; 7pPaHX8
import org.rut.util.algorithm.support.ImprovedMergeSort; h;TN$ /
import org.rut.util.algorithm.support.ImprovedQuickSort; ,bTpD!
import org.rut.util.algorithm.support.InsertSort; lo!^h]iE!
import org.rut.util.algorithm.support.MergeSort; +G:CR,Z>+
import org.rut.util.algorithm.support.QuickSort; 6_mkt|E=
import org.rut.util.algorithm.support.SelectionSort; i?{)o]i
import org.rut.util.algorithm.support.ShellSort; KXrZ:4bg
w?#s)z4}g
/** Cb}I-GtO
* @author treeroot ehTrjb3k
* @since 2006-2-2 KC+jHk
* @version 1.0 ' % d-
*/ ~fnu;'fN
public class SortUtil { N 2XL5<
public final static int INSERT = 1; 4og/y0n,l"
public final static int BUBBLE = 2; <n1panS
public final static int SELECTION = 3; `\-<tk9
public final static int SHELL = 4; 7l(GBr
public final static int QUICK = 5; jw5ldC>U
public final static int IMPROVED_QUICK = 6; ^sVr#T
public final static int MERGE = 7; 52,[dP,g
public final static int IMPROVED_MERGE = 8; Am ~P$dN
public final static int HEAP = 9; B,S~Idr}
bZ0{wpeK=
public static void sort(int[] data) { C))x#P36
sort(data, IMPROVED_QUICK); ;_X2E~i[
} sHqa(ynK
private static String[] name={ !jWE^@P/B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h0.2^vM)R
}; }3O 0nab
qdnwaJ;&
private static Sort[] impl=new Sort[]{ &J?:wC=E
new InsertSort(), rP{Jep!
new BubbleSort(), P,J+'.@
new SelectionSort(), Y_zMj`HE
new ShellSort(), xovsh\s
new QuickSort(), MxgJ+
new ImprovedQuickSort(), H\fsyxM7
new MergeSort(), +'|nsIx,
new ImprovedMergeSort(), Sx8RH),k
new HeapSort() i 558&:
}; =u-q#<h4;
%?hvN
public static String toString(int algorithm){ y{KYR)
return name[algorithm-1]; q6PG=9d0B
} d{J@A;da
?}e^-//*i
public static void sort(int[] data, int algorithm) { Kn=0AdM
impl[algorithm-1].sort(data); w,i?e\5
} =&i#NSK
riZ :#I
public static interface Sort { N7u|< 0[
public void sort(int[] data); b4qMTRnv
} YP Qix
a]/KJn/B(
public static void swap(int[] data, int i, int j) { 1}_4C0h\'
int temp = data; W)Ct*I^
data = data[j]; UgLFU#
data[j] = temp; A.vf)hO
} PI.Zd1r
} M5a&eO