[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; X"hOHx5P
} iO%Zd[
int i1=l; 7y>Tn`V8G
int i2=mid+1; qa 6=W
for(int cur=l;cur<=r;cur++){ 6P%<[Z
if(i1==mid+1) ilDJwZg#
data[cur]=temp[i2++]; k Zk .]b
else if(i2>r) :SQDqG
data[cur]=temp[i1++]; -O~C m}e
else if(temp[i1] data[cur]=temp[i1++]; A$9q!Ui#d
else DC$7B`#D
data[cur]=temp[i2++]; <S\;k@f
} kf+JM/
} JdaFY+f:
Yw~;g:=
} 6?%]odI#
]PR|d\O
改进后的归并排序: o5N]((9
tr}KPdE
package org.rut.util.algorithm.support; K[Yc<Q
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import org.rut.util.algorithm.SortUtil; ; @7
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/** ^H5w41
* @author treeroot }': EJ~H
* @since 2006-2-2 5wzQ?07T_
* @version 1.0 F3r S6_
*/ ojN`#%X
public class ImprovedMergeSort implements SortUtil.Sort { ?@Z7O.u
{ A:LAAf[6
private static final int THRESHOLD = 10; Q?* nuE
_, \y2&KT
/* (g%JK3
* (non-Javadoc) <)_:NRjBF&
* X!U]`Qh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _wm~}_Q
*/ McT\ R{/
public void sort(int[] data) { /\TQc-k?2
int[] temp=new int[data.length]; }7iUagN
mergeSort(data,temp,0,data.length-1); 4]"a;(
} ..??O^
MS{Hz,I,
private void mergeSort(int[] data, int[] temp, int l, int r) { fzLANya
int i, j, k; m5e\rMN~>\
int mid = (l + r) / 2; -,R0IGS
if (l == r) rumAo'T/%
return; >:.w7LQy/
if ((mid - l) >= THRESHOLD) rU; g0'4e
mergeSort(data, temp, l, mid); *mf}bTiS
else aN>U. SB
insertSort(data, l, mid - l + 1); $|Q".dD
if ((r - mid) > THRESHOLD) S#P+B*v
mergeSort(data, temp, mid + 1, r); ^Lsc`<xC
else ~J%R-{U9
insertSort(data, mid + 1, r - mid); a;56k
uAp -$?
for (i = l; i <= mid; i++) { q|n97.vD
temp = data; ~@%(RMJm&
} C}Rs[
for (j = 1; j <= r - mid; j++) { `ajx hp
temp[r - j + 1] = data[j + mid]; h^['rmd
} 9TqnzD
int a = temp[l]; W=~id"XtJ
int b = temp[r]; "w;08TX8
for (i = l, j = r, k = l; k <= r; k++) { M_tj7Q3 W
if (a < b) { zXQVUhL6
data[k] = temp[i++]; 3|q2rA
a = temp; 86/.8
} else { ''_,S,.a20
data[k] = temp[j--]; lxm*;?j`W
b = temp[j]; "=9-i-K9B
} nARxn#<+
} XQK^$Iq]V
} A)OdQFet(
fG<Dhz@
/** {V.Wk
* @param data IZ+*`E
* @param l SrSG{/{
* @param i y= 2=DU
*/ 5RW@_%C
private void insertSort(int[] data, int start, int len) { NI^{$QMj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b([:,T7
} ]F*|U`
} v,n);
} R'Sa?6xS4
} R_maNfS]Z
<[bQo&B2 E
堆排序： JK[T]|G
YFG-U-t3
package org.rut.util.algorithm.support; T]^?l
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import org.rut.util.algorithm.SortUtil; dFzYOG1
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/** TS1pR"6l
* @author treeroot >Q&CgGpW$
* @since 2006-2-2 Dq|GQdZ>o
* @version 1.0 ya#RII']
*/ I[@ts!YD
public class HeapSort implements SortUtil.Sort{ ?vvG)nW
^Fn%K].X
/* (non-Javadoc) Bu&So|@TL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [Uswf3
*/ >xZ5ac I
public void sort(int[] data) { d60c$?"]a(
MaxHeap h=new MaxHeap(); Qr<AV:
h.init(data); ^,LtEwd~Y
for(int i=0;i h.remove(); I<sfN'FpT
System.arraycopy(h.queue,1,data,0,data.length); TFo}\B7
} )GK+
en%J!<&W{K
private static class MaxHeap{ >#INEO
x9h?e`
void init(int[] data){ ;r3}g"D@
this.queue=new int[data.length+1]; tp@*=*^I
for(int i=0;i queue[++size]=data; ~H7!MC~K
fixUp(size); H*GlWgfG
} : g5(HH
} N=q#y@L
uN8/Q2
private int size=0; { E^U6@
oI*d/*
private int[] queue; *u}'}jC1X
3\1#eK'TK.
public int get() { h 5Hr[E1
return queue[1]; 2R\+}
} 7"#f!.E
lVP |W:~K
public void remove() { |88CBiu}
SortUtil.swap(queue,1,size--); uj)yk*
fixDown(1); dbCNhbN(
} Oc#>QZ3
file://fixdown ^}hJL7O'
private void fixDown(int k) { GtC7^Z&E
int j; =)(0.E
while ((j = k << 1) <= size) { C\OECVT
if (j < size %26amp;%26amp; queue[j] j++; +^Fp&K+^
if (queue[k]>queue[j]) file://不用交换 X PA0m
break; ;>8kPG
SortUtil.swap(queue,j,k); vmLpmxS
k = j; X~Cq
} /p,{?~0mj
} ,%kmXh
private void fixUp(int k) { ]W;:|/,c
while (k > 1) { zz&vfO31J
int j = k >> 1; =PZWS&(L
if (queue[j]>queue[k]) pcnl0o~
break; {tc57jsr
SortUtil.swap(queue,j,k); 0Q`&inwh
k = j; j|mv+O
} Z&-tMai;
} 1\y@E
Je 31".
} Od-Ax+Hp
g>yry}>04%
} /9Z!p
M1EOnq4-
SortUtil： #~S>K3(
*!w25t
package org.rut.util.algorithm; 68p R:
F_v-}bbcFQ
import org.rut.util.algorithm.support.BubbleSort; |kseKZ3
import org.rut.util.algorithm.support.HeapSort; *,&S',S-
import org.rut.util.algorithm.support.ImprovedMergeSort; 9n"V\e_R
import org.rut.util.algorithm.support.ImprovedQuickSort; 57<Di!rt
import org.rut.util.algorithm.support.InsertSort; x}|+sS,g
import org.rut.util.algorithm.support.MergeSort; I>aGp|4
import org.rut.util.algorithm.support.QuickSort; +j.qZ8
import org.rut.util.algorithm.support.SelectionSort; $it@>L8
import org.rut.util.algorithm.support.ShellSort; !9D1 Fa
p31oL{D
/** WFem#hq
* @author treeroot t!:)L+$3
* @since 2006-2-2 o0l74
* @version 1.0 <aXoB*Y
*/ C `6S}f,
public class SortUtil { Mb.4J2F?
public final static int INSERT = 1; H{%H^t>
public final static int BUBBLE = 2; !b63ik15O~
public final static int SELECTION = 3; WL1\y|
public final static int SHELL = 4; $ser+Jt=
public final static int QUICK = 5; ceG&,a$\
public final static int IMPROVED_QUICK = 6; A?r^V2+j
public final static int MERGE = 7; *gDl~qNRoS
public final static int IMPROVED_MERGE = 8; NH4?q!'G
public final static int HEAP = 9; SO_>c+Dw
s4bv;W
public static void sort(int[] data) { 5z Kqb
sort(data, IMPROVED_QUICK); ]Jn2Ra"j
} QZ~0o7
private static String[] name={ 03_pwB)^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mf9hFy*<4
}; Mg\TH./Y:
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private static Sort[] impl=new Sort[]{ )NIv "Q
new InsertSort(), iD714+N(
new BubbleSort(), ]-bQNYKX
new SelectionSort(), n}OU Y
new ShellSort(), |vz9Hs$@l
new QuickSort(), 96}eR,
new ImprovedQuickSort(), 1qZG`Vz
new MergeSort(), 9@'4P
new ImprovedMergeSort(), hl]S'yr
new HeapSort() !}t-j3bCs
}; V%51k{
ISBF\ wQY
public static String toString(int algorithm){ (:7a&2/M
return name[algorithm-1]; ]]PE#DDg
} \z:<DsQ&
CN\=9Rvs
public static void sort(int[] data, int algorithm) { yb?|Eww_o
impl[algorithm-1].sort(data); l'uOORI
} V:Mk)8Gf|
`tVy_/3(9
public static interface Sort { UP8{5fx'
public void sort(int[] data); U=QA e
} l9J*um-
#U"1 9@|}
public static void swap(int[] data, int i, int j) { NzlAC
int temp = data; hZU1O
data = data[j]; kceyuD$3G
data[j] = temp; ]r959+\$
} Dr+Ps
} nNQ-"t