[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; {?' DZR s
} 2!b+}+:
int i1=l; -HU5E>xG
int i2=mid+1; F+!K9(`|
for(int cur=l;cur<=r;cur++){ ,9W|$2=F
if(i1==mid+1) G-]ndrTn
data[cur]=temp[i2++]; n`krK"Ii
else if(i2>r) d&QB?yLd
data[cur]=temp[i1++]; B6iH[dTy_
else if(temp[i1] data[cur]=temp[i1++]; @m[r0i0J"
else -%lA=pS{Fq
data[cur]=temp[i2++]; 'Bp7LtG92
} Vn-y<*np
} ;V~[kF=t0
c_li.]P
} \ueo^p]_?
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改进后的归并排序: E1'HdOh&z
gSP]& _9j
package org.rut.util.algorithm.support; 6WQT,@?
-Fe))Y'=
import org.rut.util.algorithm.SortUtil; 2R2ws.}
{re<S<j&
/** lV-b
* @author treeroot `r:n[N=Y&
* @since 2006-2-2 ShdE!q7
* @version 1.0 ;{79d8/=
*/ tB_GEt2M
public class ImprovedMergeSort implements SortUtil.Sort { ^b]h4z$
"+iPeRF!hU
private static final int THRESHOLD = 10; "RH pj3 si
Uv~r]P)
/* Y9)uy 8c
* (non-Javadoc) %OeA"#
* db%o3>>e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]4m;NId
*/ ;x*_h
public void sort(int[] data) { ~5[#c27E9
int[] temp=new int[data.length]; |#);^z_
mergeSort(data,temp,0,data.length-1); +pcpb)VL
} dMw0Aw,2]8
h|tdK;)
private void mergeSort(int[] data, int[] temp, int l, int r) { ) N*,cTE
int i, j, k; 0L_JP9e
int mid = (l + r) / 2; O9#8%p% )
if (l == r) $ \j/s:Y
return; G'oMZb ({=
if ((mid - l) >= THRESHOLD) 6px(]QU
mergeSort(data, temp, l, mid); 0>?%{Xy
else :d v{'O
insertSort(data, l, mid - l + 1); d7.}=E.L
if ((r - mid) > THRESHOLD) ^u@"L
mergeSort(data, temp, mid + 1, r); {2EIvKu3:
else )aov]Ns
insertSort(data, mid + 1, r - mid); FA}dKE=c Q
;by`[)
for (i = l; i <= mid; i++) { V7Z+@e-5
temp = data; Em?Z
} ' XJ>;",[
for (j = 1; j <= r - mid; j++) { |'B-^?;
temp[r - j + 1] = data[j + mid]; hSQuML
} #)&kF+
int a = temp[l]; mhZ{}~
int b = temp[r]; 9?5'>WO
for (i = l, j = r, k = l; k <= r; k++) { b*w@kLLN
if (a < b) { ?6;9r[ p
data[k] = temp[i++]; W_:3Sj l'
a = temp; }w{6Ua
} else { [&e|:1
data[k] = temp[j--]; >?/Pl"{b
b = temp[j]; cn62:p]5
} m5c?A+@fZ
} %~eIx=s
} tI42]:z
-?_#Yttu
/** AI{Tw>hZ
* @param data ;m<22@,E&
* @param l d<{>&
* @param i {t<E*5N]a
*/ ~:`5Y"Av:
private void insertSort(int[] data, int start, int len) { EDQKbTaPt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v?Z30?_&h
} F xek#
} |$*1!pL-QP
} d??;r:
} dwd5P7
#|<\q*<
堆排序： ME.l{?v
kj_MzgC'?
package org.rut.util.algorithm.support; .dA_}
~m:oJ+:O
import org.rut.util.algorithm.SortUtil; (}Q(Ux@X
_ebo
/** 0,b.;r
* @author treeroot vO>Fj
* @since 2006-2-2 ,sw|OYb
* @version 1.0 ;gS)o#v0
*/ YfRjr
public class HeapSort implements SortUtil.Sort{ t1Ty.F)r
nHAET
/* (non-Javadoc) eh\_;2P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /V-uo(n< .
*/ {zd07!9y
public void sort(int[] data) { O+iNR9O
MaxHeap h=new MaxHeap(); ''t\J^+&
h.init(data); bSa%?laS
for(int i=0;i h.remove(); } Xbmb8
System.arraycopy(h.queue,1,data,0,data.length); j<"@Y7
} /e/%mo
k P]'
private static class MaxHeap{ _}bs0 kIz
cs+;ijp
void init(int[] data){ b|SDg%e
this.queue=new int[data.length+1]; Q]/ZVcoqo
for(int i=0;i queue[++size]=data; sfD@lW3
fixUp(size); SvTd#>ke
} ~Up5+7k@
} -!o*A>N
Pz\4#E]
private int size=0; (G1KMy
8jBrD1
private int[] queue; olm0O (9
f.yvKi.Cm
public int get() { k^VL{z:EWB
return queue[1]; Q$Q>pV;uH
} `$PdI4~J
]rNM3@bVy
public void remove() { v11Uw?CM
SortUtil.swap(queue,1,size--); !uZ)0R
fixDown(1); >X@4wP7l
} "SMRvi57T
file://fixdown hFMJDGCw>Q
private void fixDown(int k) { ke2zxX2f
int j; ;H' ,PjU
while ((j = k << 1) <= size) { _*l+ze[a
if (j < size %26amp;%26amp; queue[j] j++; >Hr&F nh+
if (queue[k]>queue[j]) file://不用交换 ~ 3!yd0[k
break; hs;YMUA"
SortUtil.swap(queue,j,k); Rb/|ae
k = j; NqlU?
} _xWX/1DY
} Ez1-Nx
private void fixUp(int k) { ylGT9G19
while (k > 1) { ?^3Y+)}
int j = k >> 1; KPi_<LuK
if (queue[j]>queue[k]) ?4`f@=}'K
break; ;B^ 9sr
SortUtil.swap(queue,j,k); nyoLrTs{
k = j; '048Qykt;
} t6q7w
} tZXq<k9
(Sv=R(_s
} ;W 3#q:
H\%^n<]#
} "g5<jp
y&n-8L_
SortUtil： 5)c B\N1u
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package org.rut.util.algorithm; ?]%ZJd
i,h)VCc
import org.rut.util.algorithm.support.BubbleSort; T^ )\
import org.rut.util.algorithm.support.HeapSort; m$.7) 24
import org.rut.util.algorithm.support.ImprovedMergeSort; SuR+Vv
import org.rut.util.algorithm.support.ImprovedQuickSort; d53Eu`QW?
import org.rut.util.algorithm.support.InsertSort; w#d7
import org.rut.util.algorithm.support.MergeSort; !U7}?i&H
import org.rut.util.algorithm.support.QuickSort; sC'PtFK8z
import org.rut.util.algorithm.support.SelectionSort; ).32Im!;#R
import org.rut.util.algorithm.support.ShellSort; >6KwZr BB
aCRiW;+'
/** #Zg pm"MW
* @author treeroot ~hxW3e
* @since 2006-2-2 YB+My~fw{l
* @version 1.0 2!)|B ;y
*/ ^:^
public class SortUtil { Vl^p3f[
public final static int INSERT = 1; 3^Q;On|
public final static int BUBBLE = 2; l( WF
public final static int SELECTION = 3; 6fm oIK{
public final static int SHELL = 4; F! [Gj%~I
public final static int QUICK = 5; 8kf5u#,'
public final static int IMPROVED_QUICK = 6; V8O-|7H$v
public final static int MERGE = 7; Eo`'6 3
public final static int IMPROVED_MERGE = 8; V.e30u5
public final static int HEAP = 9; 5yL\@7u`
g [u*`]-;v
public static void sort(int[] data) { 03n+kh
sort(data, IMPROVED_QUICK); {^.q6,l
} r,<p#4(>_
private static String[] name={ W5uC5C*,l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bXz*g`=;
}; _<6E>"*m
hRQw]
private static Sort[] impl=new Sort[]{ $ghlrV;:ct
new InsertSort(), b:PzqMh{G
new BubbleSort(), Bun^EJ)
new SelectionSort(), e>UU/Ks
new ShellSort(), ~}_S]^br
new QuickSort(), Sa-" G`
new ImprovedQuickSort(), F AQx8P
new MergeSort(), i'B$Xr
new ImprovedMergeSort(), Ou_2UT
new HeapSort() Obx!>mI^6
}; @rv)J[7Y&
F]L96&
public static String toString(int algorithm){ ?BX}0RWMh7
return name[algorithm-1]; m f\tMik<
} nKmf#
L=@8Zi!2<
public static void sort(int[] data, int algorithm) { )+Yu7=S
impl[algorithm-1].sort(data); |&MOus#v
} *qJHoP;
b5#Jo2C`AJ
public static interface Sort { lot;d3}
public void sort(int[] data); YIs_.CTi
} b w!
l>T]Y
public static void swap(int[] data, int i, int j) { v"*c\,
int temp = data; Y 8-;eqH
data = data[j]; OYfRtfE
data[j] = temp; w!b;.l
} E&ReQgBft
} -nZDFC8y$