[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; %G/hD
} ^?7-r6
int i1=l; +-U- D?-
int i2=mid+1; Rn(ec
for(int cur=l;cur<=r;cur++){ < #}5IQ5`Z
if(i1==mid+1) ~IfJwBn-i
data[cur]=temp[i2++]; tGh~!|P
else if(i2>r) aFb==73aLw
data[cur]=temp[i1++]; .B]MpmpK
else if(temp[i1] data[cur]=temp[i1++]; IS{wtuA.
else ~Z?TFg
data[cur]=temp[i2++]; M4oy
} wc NOLUl
} HJLG=mU
G )trG9 .a
} gx8ouOh
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改进后的归并排序: $m%fwB
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package org.rut.util.algorithm.support; :bu/^mW[
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import org.rut.util.algorithm.SortUtil; Yz/md1T$
+`7i'ff
/** %S@ZXf~:
* @author treeroot \K{0L
* @since 2006-2-2 QQ*hCyw!
* @version 1.0 XSe=sHEI
*/ 0d"[l@UU0
public class ImprovedMergeSort implements SortUtil.Sort { 7$vYo _
a LroD$#
private static final int THRESHOLD = 10; mPtZO*Fc
EyD=q! ZVZ
/* q77;ZPfs8
* (non-Javadoc) /ivJsPH
* Pmr5S4Ka
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B:;pvW]
*/ 8>2.UrC
public void sort(int[] data) { j9x<Y]
int[] temp=new int[data.length]; fcRxp{*zO
mergeSort(data,temp,0,data.length-1); _"Dv uR
} 7a=gH2]&
zl>nSndRE
private void mergeSort(int[] data, int[] temp, int l, int r) { fo*2:?K&
int i, j, k; \Xt7`I<
int mid = (l + r) / 2; hLd^ agX
if (l == r) '8RsN-w
return; zUkgG61
if ((mid - l) >= THRESHOLD) dUeN*Nq&(,
mergeSort(data, temp, l, mid); 55nlg>j
else R[h9"0Y^
insertSort(data, l, mid - l + 1); g|DF[
if ((r - mid) > THRESHOLD) q1$N>;&
mergeSort(data, temp, mid + 1, r); p*R;hU
else }{K) 4M
insertSort(data, mid + 1, r - mid); Fh?gNSWq6
??-[eB.
for (i = l; i <= mid; i++) { 0U(@=7V
temp = data; {3>$[bT
} Ga-k
for (j = 1; j <= r - mid; j++) { :j9l"5"
temp[r - j + 1] = data[j + mid]; zH?!
} VuhGx:Xl
int a = temp[l]; *KZYv=s,u
int b = temp[r]; ?mwt~_s9
for (i = l, j = r, k = l; k <= r; k++) { ]^. _z
if (a < b) { RVnjNy;O`
data[k] = temp[i++]; iW]j9}t
a = temp; v}}F,c(f
} else { 7Utn\l
data[k] = temp[j--]; b$d;Qx
b = temp[j]; 'Vzp2
} acajHs
} [i21FX
} `quw9j9`C\
L:KF_W.I+
/** 9|^2",V
* @param data >a!/QMh
* @param l )#0O>F~
* @param i >Eyt17_H"n
*/ |sJ[0z
private void insertSort(int[] data, int start, int len) { *.ll<p+(-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !_]Y~[
} d\&U*=
} /kZebNf6H
} e&|'I"
} @wGPqg
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堆排序： .9/hHCp
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package org.rut.util.algorithm.support; &&5aM
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import org.rut.util.algorithm.SortUtil; WrnrFz
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/** du $:jN\}
* @author treeroot 4qb/daE:Z
* @since 2006-2-2 SXSgld2uS
* @version 1.0 I13y6= d
*/ bQzZy5,
public class HeapSort implements SortUtil.Sort{ j2t7'bO_
e@L=LW>
/* (non-Javadoc) @+&LYy72
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x77*c._3v
*/ WA<v9#m
public void sort(int[] data) { \#8D>i?m
MaxHeap h=new MaxHeap(); sNbxI|B
h.init(data); JinUV6cr
for(int i=0;i h.remove(); s$zLiQF;
System.arraycopy(h.queue,1,data,0,data.length); b<tNk]7
} S*,17+6dV
sf:,qD=z
private static class MaxHeap{ !4ocZmj\
KaLzg5is
void init(int[] data){ Z\(q@3C
this.queue=new int[data.length+1]; -vAC"8)S
for(int i=0;i queue[++size]=data; AmUr.ofu
fixUp(size); SpIv#?
} [$ubNk;!z
} lB8-Z ow
@f_Lp%K
private int size=0; I }a`0Y&{
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private int[] queue; o@_q]/Mh
y B81f
public int get() { ~T"Rw2vb
return queue[1]; H9Gh>u]}
} RF?`vRZOe
sbfuzpg]*
public void remove() { O0*p0J
SortUtil.swap(queue,1,size--); F;Spi
fixDown(1); `_6C{<O
} K6)Gc%:`
file://fixdown v1#otrf
private void fixDown(int k) { IY1//9
int j; 8$]1M,$r
while ((j = k << 1) <= size) { j}#w)M
if (j < size %26amp;%26amp; queue[j] j++; Q8$}@iA[
if (queue[k]>queue[j]) file://不用交换 Ex.yU{|c
break; XMCXQs&
SortUtil.swap(queue,j,k); SjK
k = j; !K#qeY}
} a)!o @
} oe ~'o'
private void fixUp(int k) { :ffY6L+
while (k > 1) { HRpte=`q
int j = k >> 1; f'F?MINJP
if (queue[j]>queue[k]) Q*GN`07@?d
break; kx8G
SortUtil.swap(queue,j,k); `](e:be}
k = j; NYhB'C2
} RV1coC.g4x
} i}(LqcYU
Do9x XK
} M.JA.I@XC
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} g%aYDl
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SortUtil： .zf~.R;>
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package org.rut.util.algorithm; &L3M]
]|#+zx|/D
import org.rut.util.algorithm.support.BubbleSort; {aZ0;
import org.rut.util.algorithm.support.HeapSort; RCJ|P~*
import org.rut.util.algorithm.support.ImprovedMergeSort; IM*y|UHt
import org.rut.util.algorithm.support.ImprovedQuickSort; g/4[N{Xf
import org.rut.util.algorithm.support.InsertSort; (xycJ`N
import org.rut.util.algorithm.support.MergeSort; ?C]vS_jAh
import org.rut.util.algorithm.support.QuickSort; ??5Q)Erm1
import org.rut.util.algorithm.support.SelectionSort; pG_;$8Hc
import org.rut.util.algorithm.support.ShellSort; k``_EiV4t
pt?bWyKG
/** R- X5K-
* @author treeroot ]43/`FX
* @since 2006-2-2 L]7=?vN=8
* @version 1.0 />C^WQI^
*/ +8T?{K
public class SortUtil { "%)qRe
public final static int INSERT = 1; \Zk;ikEY
public final static int BUBBLE = 2; cUk7i`M;6
public final static int SELECTION = 3; `Uq#W+r,
public final static int SHELL = 4; vN}#Kc\
public final static int QUICK = 5; O}gV`q;
public final static int IMPROVED_QUICK = 6; ~ZaY!(R<
public final static int MERGE = 7; eNh39er
public final static int IMPROVED_MERGE = 8; ^+ml5m
public final static int HEAP = 9; t6rRU~;}
KA5v+~
public static void sort(int[] data) { m5n#v
sort(data, IMPROVED_QUICK); qyb?49I
} H;mSkRD3N
private static String[] name={ VD AaYDi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "37lx;CH
}; _=r6=.
/*~EO{o
private static Sort[] impl=new Sort[]{ $B+8Of
new InsertSort(), PJ')R:e,
new BubbleSort(), |*Yr<zt
new SelectionSort(), f^3*)Ni
new ShellSort(), Xc++b|k
new QuickSort(), +:2klJ
new ImprovedQuickSort(), l03B=$
new MergeSort(), 2F[ q).
new ImprovedMergeSort(), S E<FL/x1#
new HeapSort() ]Ee?6]bN
}; VO5#Qgen
^^u5*n+5
public static String toString(int algorithm){ y G~?MEh{
return name[algorithm-1]; _{ue8kGt
} ,O5NLg-
~i= _J3'
public static void sort(int[] data, int algorithm) { I@\lN&HC
impl[algorithm-1].sort(data); BkAm/R
} pp?D7S
m[osg< CR_
public static interface Sort { TvoyZW\?w
public void sort(int[] data); >-?f0K
} E,Z$pKL?
5PCqYN(:B
public static void swap(int[] data, int i, int j) { `?H]h"{7Q
int temp = data; :9afg
data = data[j]; (M|Dx\_
data[j] = temp; =HK!(C
} u~N?NW Q
} 3m[vXr?