[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; 6l x>>J!H
} &`r-.&Y
int i1=l; ,^< R{{{-A
int i2=mid+1; k%#EEMh
for(int cur=l;cur<=r;cur++){ 4l'fCZhA}
if(i1==mid+1) @Uvz8*b6
data[cur]=temp[i2++]; _6hQ %hv8
else if(i2>r) M FMs[+2_o
data[cur]=temp[i1++]; |aS.a&vwR
else if(temp[i1] data[cur]=temp[i1++]; lb3bm)@:
else s 5Qcl;}
data[cur]=temp[i2++]; |SSSH
} V)k4:H
} G>}255qY
.`H5cuF`
} :eCwY
)2o?#8J
改进后的归并排序: V2EUW!gn 2
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package org.rut.util.algorithm.support; %aCqi(.7
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import org.rut.util.algorithm.SortUtil; _4~+{l+
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/** +\]\[6
* @author treeroot &r/Mi%
* @since 2006-2-2 T?0eVvM
* @version 1.0 <xm7qmqI
*/ ]F~dlH1Wp
public class ImprovedMergeSort implements SortUtil.Sort { Sz`,X0a
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private static final int THRESHOLD = 10; ;$|nrwhy
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/* q54]1TQ
* (non-Javadoc) U7F!Z( 9
* /,yd+wcW#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bAqA1y3=
*/ Zu[su>\
public void sort(int[] data) { ~<bZ1TD
int[] temp=new int[data.length]; *i%d,w0+
mergeSort(data,temp,0,data.length-1); (L&d!$,Dv
} CHX#^0m.
;)*eo_tQ
private void mergeSort(int[] data, int[] temp, int l, int r) { J ZS:MFA
int i, j, k; x 9fip-
int mid = (l + r) / 2; ZY+qA
if (l == r) bY:x8fl
return; T8$y[W-c
if ((mid - l) >= THRESHOLD) Y:[u1~a
mergeSort(data, temp, l, mid); Xx:"4l.w.
else 99QU3c<.
insertSort(data, l, mid - l + 1); 0GeTSFj
if ((r - mid) > THRESHOLD) onzxx4bax
mergeSort(data, temp, mid + 1, r); ;.980+i1
else F]&*ow
insertSort(data, mid + 1, r - mid); (!WD1w
B]tQ(s~
for (i = l; i <= mid; i++) { Wne@<+mX
temp = data; ?e 4/p
} xy;;zOh`
for (j = 1; j <= r - mid; j++) { %'pgGC"|
temp[r - j + 1] = data[j + mid]; 'H;*W|:-]
} $!t4r
int a = temp[l]; tWcHb #
int b = temp[r]; NzvXN1_%
for (i = l, j = r, k = l; k <= r; k++) { ww1[rCh\+
if (a < b) { j8sH|{H!Nq
data[k] = temp[i++]; Q$"D]!G
a = temp; 0g8NHkM:2a
} else { %pCTN P
data[k] = temp[j--]; eaU
b = temp[j]; W"{N Bi
} (E1~H0^
} 8}:nGK|kx
} CqC`8fD1
*vMn$,^0h9
/** iy.\=Cs$N
* @param data 4*;MJ[|
* @param l dWBA1p
* @param i y@yD5$/
*/ 8z\xrY
private void insertSort(int[] data, int start, int len) { )4;`^]F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H\[W/"
} _aeBauD
} a 1*p*dM#
} 6Kz,{F@
} '|=;^Z7.K
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堆排序： />>\IR
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package org.rut.util.algorithm.support; a8Wwq?@
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import org.rut.util.algorithm.SortUtil; Dvln/SBk
c:.eGH_f
/** /qw.p#
* @author treeroot ddR>7d}N
* @since 2006-2-2 32 =z)]FZ
* @version 1.0 &cTU sK
*/ Xn ;AZu^'R
public class HeapSort implements SortUtil.Sort{ |wj?ed$ f
U m+8"W
/* (non-Javadoc) Y<8vw d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ? =+WRjF
*/ #e5\j\#.
public void sort(int[] data) { &kw@,];4Z
MaxHeap h=new MaxHeap(); ?bu>r=oIO]
h.init(data); <9 ;!3xG
for(int i=0;i h.remove(); <54 S
System.arraycopy(h.queue,1,data,0,data.length); GPkpXVm
} 40 0#v|b
/u+e0BHo
private static class MaxHeap{ DlNX 3
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void init(int[] data){ pD+k*
this.queue=new int[data.length+1]; #3d(M
for(int i=0;i queue[++size]=data; )\^-2[;
fixUp(size); 0SPk|kr
} VLN_w$iEq
} #R RRu2
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private int size=0; ~F7gP{r
dC4'{n|7
private int[] queue; 01o4Th m
,6W>can
public int get() { RCLeA=/N@0
return queue[1]; L&OwPd
} 5NLDYi@3
76` .Y
public void remove() { 2dgd~
SortUtil.swap(queue,1,size--); ~<x:q6
fixDown(1); T9q-,w/j;
} P L+sR3bR
file://fixdown j1HW._G
private void fixDown(int k) { ?[>3QE
int j; :p6M=
while ((j = k << 1) <= size) { Oz#{S:24M+
if (j < size %26amp;%26amp; queue[j] j++; Q)z8PQl O
if (queue[k]>queue[j]) file://不用交换 uA#;G/$
break; RY*U"G0#w
SortUtil.swap(queue,j,k); EDs\,f}
k = j; w:l V"]1
} ~.lPEA %%
} ##4HYQ%E
private void fixUp(int k) { $7A8/#
while (k > 1) { eGbGw
int j = k >> 1; $]2vvr
if (queue[j]>queue[k]) 9]o-O]7/
break; w^0nqh
SortUtil.swap(queue,j,k); *siFj CN<
k = j; Xm2z}X(%
} `n?DU;,
} Nu~lsWyRI5
0S$N05
} -1ub^feJ,
@2v_pJy^
} QoH6
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SortUtil： i8HTzv"J
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package org.rut.util.algorithm; Z>#i**
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import org.rut.util.algorithm.support.BubbleSort; 4#hSJ(~7S
import org.rut.util.algorithm.support.HeapSort; 5rZ
import org.rut.util.algorithm.support.ImprovedMergeSort; _ZkI)o
import org.rut.util.algorithm.support.ImprovedQuickSort; t}/( b/VD
import org.rut.util.algorithm.support.InsertSort; 0h7r&t%YsV
import org.rut.util.algorithm.support.MergeSort; i,9)\1R
import org.rut.util.algorithm.support.QuickSort; kX2rp?{
import org.rut.util.algorithm.support.SelectionSort; 0>Z_*U~6
import org.rut.util.algorithm.support.ShellSort; c6]D-YNFG
| (_
/** e6RPIg
* @author treeroot ] {HI?V
* @since 2006-2-2 Alw3\_X
* @version 1.0 K0Fh%Y4)QH
*/ lQkQ9##*
public class SortUtil { mF^v~
public final static int INSERT = 1; /FEVmH?
public final static int BUBBLE = 2; xe&i^+i
public final static int SELECTION = 3; 001FmiV
public final static int SHELL = 4; }Y36C.@H
public final static int QUICK = 5; 7o5BXF
public final static int IMPROVED_QUICK = 6; y;@:ulv[
public final static int MERGE = 7; _/5H l`
public final static int IMPROVED_MERGE = 8; )~ h}
public final static int HEAP = 9; nt7.?$
< F+l
public static void sort(int[] data) { 2WxQ(:d=
sort(data, IMPROVED_QUICK); t"/q]G5
} /{--+ C
private static String[] name={ pgZXJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :T !'N\7
}; ,f;}|d:r
]^K4i)\
private static Sort[] impl=new Sort[]{ )iK6:s#
new InsertSort(), :$BCRQ
new BubbleSort(), 9.B KI/
new SelectionSort(), gn".u!9j
new ShellSort(), a\YV3NJ/A
new QuickSort(), O~K>4ax
new ImprovedQuickSort(), a8Nh=^Py
new MergeSort(), 2Gaa(rJ5o
new ImprovedMergeSort(), LsS
new HeapSort() k4y'b
}; KE3;V2Ym f
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public static String toString(int algorithm){ b9<#K+L-
return name[algorithm-1]; ls:w8&`*
} =`s!;
d8=x0~7
public static void sort(int[] data, int algorithm) { \WB<86+z
impl[algorithm-1].sort(data); DG ;_Vg
} {vyv7L
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public static interface Sort { xx9 g''Q
public void sort(int[] data); v+#}rUTF
} !"/n/jz
.Cl:eu,]
public static void swap(int[] data, int i, int j) { F Yzi~L
int temp = data; E3gh?6
data = data[j]; )@Yf]qx+Y<
data[j] = temp; (~wqa 3
} aa#Y=%^
} (w/T-*