[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; +7D|4
} 0=@?ob7
int i1=l; bv]`!g: C
int i2=mid+1; LSa,1{
for(int cur=l;cur<=r;cur++){ A!s`[2 Z
if(i1==mid+1) A-Sv;/yD_
data[cur]=temp[i2++]; >kj`7GA
else if(i2>r) 1an^1!
data[cur]=temp[i1++]; R&8Iz yM
else if(temp[i1] data[cur]=temp[i1++]; H[s(e56z
else 8ndYV>{f
data[cur]=temp[i2++]; BZ94NOOdw
} nhB1D-
} gp};D
8;b(0^
} m,*QP*
nt 81Bk=
改进后的归并排序: ?*[N_'2W+
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package org.rut.util.algorithm.support; eJF5n#
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import org.rut.util.algorithm.SortUtil; \rx3aJl
*xx'@e|<;
/** wa<MRt W=
* @author treeroot I WTwz!+
* @since 2006-2-2 lGV0*Cji
* @version 1.0 /f:dv?!km
*/ =)M/@T
public class ImprovedMergeSort implements SortUtil.Sort { Hu\B"fdS
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private static final int THRESHOLD = 10; nOt&pq7
zvYq@Mhr
/* rXmn7;B}g
* (non-Javadoc) *]ly0nP
* NO7J!k?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +6sy-<ZL:
*/ Ed0QQyC@9
public void sort(int[] data) { _(_a*ml
int[] temp=new int[data.length]; j@W.&- _
mergeSort(data,temp,0,data.length-1); '-r).Xk
} 6LOnU~l,
e}D3d=6`
private void mergeSort(int[] data, int[] temp, int l, int r) { S@jQX
int i, j, k; K,Ef9c/+K
int mid = (l + r) / 2; hEA<o67
if (l == r) I?h)OvWd
return; !^^?dRd*v
if ((mid - l) >= THRESHOLD) L6t+zIUc-~
mergeSort(data, temp, l, mid); Vi>,kF.fV
else TTeH`
insertSort(data, l, mid - l + 1); %}SGl${-
if ((r - mid) > THRESHOLD) 0ZT5bg_M
mergeSort(data, temp, mid + 1, r); MuYk};f
else ;+e}aER&9
insertSort(data, mid + 1, r - mid); O!mvJD
j2Cks_$:
for (i = l; i <= mid; i++) { 8|):`u
temp = data; #^`4DhQ/ 1
} $Z!`Hb
for (j = 1; j <= r - mid; j++) { ~qcNEl\-y
temp[r - j + 1] = data[j + mid]; NaPt"G
} ;9[fonk
int a = temp[l]; <LmIK
int b = temp[r]; O}+.U<V
for (i = l, j = r, k = l; k <= r; k++) { NO~*T?&
if (a < b) { T_i:}ul
data[k] = temp[i++]; $*SW8'],`
a = temp; >sfRI]OG
} else { whmdcVh.
data[k] = temp[j--]; Vr)<\h
b = temp[j]; b=g8eMm
} GQt8p[!
} aH 4c02s$
} H2&@shOOQJ
LM$W*
/** I(]}XZq
* @param data J@^8ko
* @param l Z,RzN5eN
* @param i O,J>/
*/ 8J=?5
private void insertSort(int[] data, int start, int len) { .Obw|V-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); udxFz2>_l$
} J5di[nu
} pf%=h |
} !g?|9
} *?Lv3}E
(*Z)(O*z
堆排序： hLI`If/+K
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package org.rut.util.algorithm.support; m`v2: S}
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import org.rut.util.algorithm.SortUtil; ]Uw<$!$-]s
;Yx)tWQI
/** 8}c$XmCM
* @author treeroot ?{\nf7Y
* @since 2006-2-2 ^$%S &W
* @version 1.0 M9Cv wMi
*/ ZW-yP2
public class HeapSort implements SortUtil.Sort{ ks3`3q 7
TMAJb+@l:
/* (non-Javadoc) &+a9+y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,oN8HpGs
*/ k'gh
public void sort(int[] data) { m`IC6*
MaxHeap h=new MaxHeap(); *-+&[P]m
h.init(data); m#8m] Y
for(int i=0;i h.remove(); c|lu&}BS
System.arraycopy(h.queue,1,data,0,data.length); 0Oi,#]F
} H9KKed47d/
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private static class MaxHeap{ {s)+R[?m<o
%u`8minCt
void init(int[] data){ J1/?JfF
this.queue=new int[data.length+1]; BHd&yIyI
for(int i=0;i queue[++size]=data; k]W[`
fixUp(size); GT~)nC9f
} @En^wN
} g3Ec"_>P
Mx6@$tQ%
private int size=0; M^MdRu
dI*pDDq#
private int[] queue; z3`-plE
Wc,_RN-
public int get() { *7*lE"$p
return queue[1]; y#>,+a#5
} A:>01ZJ5S+
cmBB[pk\
public void remove() { ^:K3vC[h;c
SortUtil.swap(queue,1,size--); unshH<
fixDown(1); FjK3 .>'
} 0T@Zb={
file://fixdown zw+B9PYqX
private void fixDown(int k) { &yGaCq;0
int j; UUSq$~Ct
while ((j = k << 1) <= size) { K2he4<
if (j < size %26amp;%26amp; queue[j] j++; 8 ![|F:
if (queue[k]>queue[j]) file://不用交换 ,O.3&Nz,c
break; CJ(NgYC h
SortUtil.swap(queue,j,k); '/`= R
k = j; eKgisY4#
} 7bqBk,`9
} 7]^M>#
private void fixUp(int k) { `o<' x.I
while (k > 1) { t]>Lh>G
int j = k >> 1; &?VQ,+[<
if (queue[j]>queue[k]) tDSJpW'd
break; (]b!{kS
SortUtil.swap(queue,j,k); =fu :@+
k = j; L~_9_9c
} Z= jr-)kK
} g$( V^
qi;f^9M%
} OH;b"]
D0gZC
} ~}F{vm
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SortUtil： NXwz$}}Pp
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package org.rut.util.algorithm; Z&0'a
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import org.rut.util.algorithm.support.BubbleSort; , 3,gG"
import org.rut.util.algorithm.support.HeapSort; .^N/peUq
import org.rut.util.algorithm.support.ImprovedMergeSort; @[5xq
import org.rut.util.algorithm.support.ImprovedQuickSort; JmPHAUd
import org.rut.util.algorithm.support.InsertSort; /3A^I{e74
import org.rut.util.algorithm.support.MergeSort; HkQ*y$$
import org.rut.util.algorithm.support.QuickSort; W`K7 QWV4
import org.rut.util.algorithm.support.SelectionSort; ;epV<{e$q4
import org.rut.util.algorithm.support.ShellSort; FQT~pfY
dA@'b5N{"
/** _Xnqb+
* @author treeroot Is]aj-#r
* @since 2006-2-2 ]GN7+8l
* @version 1.0 sW)Zi
*/ ld3-C55
public class SortUtil { -M%_\;"de
public final static int INSERT = 1; [`p=(/I&L
public final static int BUBBLE = 2; MxWy*|J}
public final static int SELECTION = 3; bSsh^Z
public final static int SHELL = 4; q2. XoCf
public final static int QUICK = 5; ?z}=B
public final static int IMPROVED_QUICK = 6; hZh9uI7.
public final static int MERGE = 7; ^[]}R:
public final static int IMPROVED_MERGE = 8; #Xhdn\7
public final static int HEAP = 9; P/xKnm~
R16'?,
public static void sort(int[] data) { XpmS{nb
sort(data, IMPROVED_QUICK); bA= |_Wt
} qP{/[uj[K
private static String[] name={ lrnyk(M}Q.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2rmSo&3@s
}; M>&%(4K
A:aE|v/T&
private static Sort[] impl=new Sort[]{ cs T2B[f9D
new InsertSort(), $rz=6h
new BubbleSort(), ':gUOra|I
new SelectionSort(), fQ/ 0R
new ShellSort(), f` :i.Sr
new QuickSort(), /J04^6
new ImprovedQuickSort(), ,S'p%g
new MergeSort(), XEn*?.e
new ImprovedMergeSort(), _{R=B8Zz\
new HeapSort() AK\$i$@6
}; +|bmT
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public static String toString(int algorithm){ >y.%xK
return name[algorithm-1]; (WK&^,zQn
} [ j3&/
`9)t[7
public static void sort(int[] data, int algorithm) { Z-E`>
impl[algorithm-1].sort(data); *GxTX3i}vc
} jov:]Bic
}| J79s2M
public static interface Sort { {Z3dF)>
public void sort(int[] data); |~'IM3Jw(Y
} q6_u@:3u
JL\w_v
public static void swap(int[] data, int i, int j) { 5m?8yT}
int temp = data; xqC+0{]y
data = data[j]; [F*.\
data[j] = temp; = QQ5f5\l
} Y^ kXSU
} vFE;D@bz: