[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; I/B1qw;MN
} xK;e\^v
int i1=l; "^%Z'ou
int i2=mid+1; (p |DcA]BX
for(int cur=l;cur<=r;cur++){ h\y-L~2E
if(i1==mid+1) ut5yf$%
data[cur]=temp[i2++]; BXhWTGiG
else if(i2>r) s;{K!L@
data[cur]=temp[i1++]; U CY2]E
else if(temp[i1] data[cur]=temp[i1++]; )#`H."Z
else AyTx'u
data[cur]=temp[i2++]; m;/i<:`
} FFe)e>bH
} SLoo:)
rAXX}"l6s
} |Td5l?
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改进后的归并排序: >n!ni(
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package org.rut.util.algorithm.support; r(`nt-o@
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import org.rut.util.algorithm.SortUtil; HomN/wKh
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/** $(q8y/,R*-
* @author treeroot 5I,$EGG
* @since 2006-2-2 Ze ? g
* @version 1.0 0ar=cuDm
*/ |F!F{d^p
public class ImprovedMergeSort implements SortUtil.Sort { E _iO@
mU G %LM
private static final int THRESHOLD = 10; 8QF`,oXQO
gb 4pN
/* nGrVw&
* (non-Javadoc) ;nB2o-%
* U:lv^QPG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }*kJ-q&0
*/ 7X'y>\^w^>
public void sort(int[] data) { ;NsO
int[] temp=new int[data.length]; !R:y'Y%j
mergeSort(data,temp,0,data.length-1); ,7,;twKz
} RJc%, ]:
97!5Q~I
private void mergeSort(int[] data, int[] temp, int l, int r) { xl] ;*&
int i, j, k; =B(mIx;m
int mid = (l + r) / 2; G6O/(8
if (l == r) PZM42"[&
return; c8DZJSO
if ((mid - l) >= THRESHOLD) `ROEV~
mergeSort(data, temp, l, mid); Dip*}8$o(w
else \&q=@rJp(z
insertSort(data, l, mid - l + 1); .3wY\W8Dr-
if ((r - mid) > THRESHOLD) o3h-=t
mergeSort(data, temp, mid + 1, r); kx{!b3"
else 3jPB#%F
insertSort(data, mid + 1, r - mid); >oqZ !V5[
|9,UaA
for (i = l; i <= mid; i++) { Z> 74.r
temp = data; 7BFN|S_l
} agsISu(
for (j = 1; j <= r - mid; j++) { cZ< \
temp[r - j + 1] = data[j + mid]; $qm~c[x%
} c8ZCs?
int a = temp[l]; 8H $#+^lW
int b = temp[r]; JTUNb'#RZ
for (i = l, j = r, k = l; k <= r; k++) { Q4K+*Fi}
if (a < b) { {Y_Nj`#BT
data[k] = temp[i++]; (9GbG"
a = temp; &!1}`4$[T
} else { ;KcFy@ 6q5
data[k] = temp[j--]; ?`P2'i<b
b = temp[j]; K{L.ZH>7
} gdi`x|0
} yQ[u3tI
} w0Ij'=:
Y@}FL;3
/** D4Sh9:\
* @param data uva\0q
* @param l l{%a&/
* @param i Y';>O`
*/ !_^g8^>2(
private void insertSort(int[] data, int start, int len) { xo~g78jm7,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +,_c/(P
} mk=#\>
} V0NVGRQ
} POGw`:)A
} M#M?1(O/NE
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堆排序： 6tdI6
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package org.rut.util.algorithm.support; -e*BqH2t
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import org.rut.util.algorithm.SortUtil; Q!$IQJ]|Y
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/** #&siHHs \
* @author treeroot zilaP)5x6
* @since 2006-2-2 4}-#mBV]/
* @version 1.0 wj%wp[KA$
*/ kaFnw(xa
public class HeapSort implements SortUtil.Sort{ 8"M<{72U]
CEqZ:c
/* (non-Javadoc) `C'}e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) afm_Rrg[
*/ 'h}7YP, w
public void sort(int[] data) { d8:C3R
MaxHeap h=new MaxHeap(); Gah lS*W
h.init(data); }1>atgq]w
for(int i=0;i h.remove(); &=zU611,
System.arraycopy(h.queue,1,data,0,data.length); sXB+s
} V2Y$yV8g1
mo9$NGM&}
private static class MaxHeap{ Yu3_=: <C
i<iXHBs
void init(int[] data){ <SQ(~xYi
this.queue=new int[data.length+1]; [g|Hj)(
for(int i=0;i queue[++size]=data; v@_in(dk
fixUp(size); h7?.2Q&S
} lzfDH=&
} ORH93`
oT->^4WY
private int size=0; ^saM$e^c:
FpzP#;
private int[] queue; `Bu9Nq
D5`(}
public int get() { b1=pO]3u
return queue[1]; S=O$JP79
} Wz{%"o
d_T<5Hin
public void remove() { f)^t')
SortUtil.swap(queue,1,size--); "Ot{^_e
fixDown(1); MPvWCPB
} qGa<@ b
file://fixdown T.@sq
private void fixDown(int k) { qLRE}$P
int j; |nm2Uy/0
while ((j = k << 1) <= size) { $ !5f"<FCB
if (j < size %26amp;%26amp; queue[j] j++; a#QByP
if (queue[k]>queue[j]) file://不用交换 }+DDJ6Jzs
break; P6we(I`"2
SortUtil.swap(queue,j,k); +*a7GttU
k = j; IJIQ" s
} S'@=3)
} ND*]gM
private void fixUp(int k) { BD'NuI
while (k > 1) { xt))]aH
int j = k >> 1; kY!C_kFcn
if (queue[j]>queue[k]) i4VK{G~g"
break; $e1:Q#den2
SortUtil.swap(queue,j,k); ysVi3eq
k = j; w_H2gaQ
} 3{pk5_c
} x@Vt[}e
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} 6Ahr_{
7TdQRB
} 0||F`24
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SortUtil： kW(Kh0x
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package org.rut.util.algorithm; _BwKY#09Zp
,Hh*3rR^
import org.rut.util.algorithm.support.BubbleSort; 4W-"|Z_x
import org.rut.util.algorithm.support.HeapSort; o=mo/N4
import org.rut.util.algorithm.support.ImprovedMergeSort; wA",SBGX
import org.rut.util.algorithm.support.ImprovedQuickSort; y.ql#eQ,
import org.rut.util.algorithm.support.InsertSort; .C?GW1[c~@
import org.rut.util.algorithm.support.MergeSort; >)y$mc6
import org.rut.util.algorithm.support.QuickSort; yjd(UWE
import org.rut.util.algorithm.support.SelectionSort; YZ\@)D;
import org.rut.util.algorithm.support.ShellSort; GBr,LN
nNs .,J)
/** [`9^QEj
* @author treeroot dyl 0]Z
* @since 2006-2-2 Gl;f#}
* @version 1.0 j"6:A
*/ ;q&0,B
public class SortUtil { /f]/8b g>
public final static int INSERT = 1; K @C4*?P
public final static int BUBBLE = 2; hiIyaWU
public final static int SELECTION = 3; ol#yjrv
public final static int SHELL = 4; 4Pf+]R
public final static int QUICK = 5; "ZqEP R)
public final static int IMPROVED_QUICK = 6; idz9YpW
public final static int MERGE = 7; QQq/5r4O`q
public final static int IMPROVED_MERGE = 8; .5z&CJDiIi
public final static int HEAP = 9; i*z0Jf["
p}BGw:=
public static void sort(int[] data) { -xTKdm D
sort(data, IMPROVED_QUICK); CPGL!:
} Z+,CL/
private static String[] name={ gi 5XP]z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Iy.mVtcsZ
}; ,\}k~ U99
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private static Sort[] impl=new Sort[]{ 9R>~~~{-Go
new InsertSort(), r},lu=em
new BubbleSort(), !"%S#nrL$
new SelectionSort(), vlAy!:CV
new ShellSort(), #@q1Ko!NZ
new QuickSort(), 1~L\s}|2d
new ImprovedQuickSort(), 5f{wJb2
new MergeSort(), [x|)}P7%s
new ImprovedMergeSort(), ~.H~XKw
new HeapSort() *F..ZS'$[
}; 7P c(<Ui+
gtMw3D`FL
public static String toString(int algorithm){ 4`6< {
return name[algorithm-1]; ExqM1&zpK
} dXDXRY.FMQ
6qf-Y!D5
public static void sort(int[] data, int algorithm) { =tHD 4I
impl[algorithm-1].sort(data); yH+c#w
} }EP|Mb
cPSti
public static interface Sort { P]-#wz=S
public void sort(int[] data); Y=|CPE%V
} w#rVSSXQ3
3jS7 uU
public static void swap(int[] data, int i, int j) { &rcdr+'
int temp = data; <irpmRQr
data = data[j]; _trpXkQp
data[j] = temp; "H@Fe
} Z]7tjRvq)
} ] .`_, IO