[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; /XeDN-{
} 0k@4;BYu
int i1=l; &BY%<h0c
int i2=mid+1; V}. uF,>V
for(int cur=l;cur<=r;cur++){ d(3F:dbk
if(i1==mid+1) X*KQWs.
data[cur]=temp[i2++]; X|TEeE c[L
else if(i2>r) .0:BgM
data[cur]=temp[i1++]; D^baXp8
else if(temp[i1] data[cur]=temp[i1++]; J}c57$Z
else :2pd2S
data[cur]=temp[i2++]; XI} C|]#
} IEfzu L<v
} *p`0dvXG2
x1:+M]Da
} 5Q#;4
w},' 1
改进后的归并排序: Wb+^Ue
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package org.rut.util.algorithm.support; +dX1`%RR[
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import org.rut.util.algorithm.SortUtil; K_{f6c<
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/** jL(=<R(~y
* @author treeroot {>H#/I8si
* @since 2006-2-2 6vbWe@#U/
* @version 1.0 (%}T\~`1z#
*/ 0#pjfc `:
public class ImprovedMergeSort implements SortUtil.Sort { A[oLV"J6x5
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private static final int THRESHOLD = 10; rbiNp6AdL
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/* r(y1^S9!8
* (non-Javadoc) !rZO~a0
* |R8=yO%(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +0rMv
*/ T]Gxf"mK
public void sort(int[] data) { dIQ7u
int[] temp=new int[data.length]; XKp.]c wP
mergeSort(data,temp,0,data.length-1); ~=h]r/b< U
} %jdV8D#Q
gcqcY
private void mergeSort(int[] data, int[] temp, int l, int r) { a*REx_gLG
int i, j, k; BIEc4k5(
int mid = (l + r) / 2; J~eY,n.6]
if (l == r) jb~a z
return; BF@(`D&>
if ((mid - l) >= THRESHOLD) sOg@9-_Uh
mergeSort(data, temp, l, mid); 5LbU'5
else A%>Ir`I
insertSort(data, l, mid - l + 1); e4p:Zb:
if ((r - mid) > THRESHOLD) h#'(i<5v
mergeSort(data, temp, mid + 1, r); +6|Ys
else b Gq0k&
insertSort(data, mid + 1, r - mid); @=,2{JF*6
)f1<-a"D|
for (i = l; i <= mid; i++) { %^n9Z/I
temp = data; {Z 3t0F
} CP_ ?DyWU
for (j = 1; j <= r - mid; j++) { nr*~R-,\
temp[r - j + 1] = data[j + mid]; DeE-M"
} %lNv?sWb
int a = temp[l]; _I8L#4\(=
int b = temp[r]; }hrLM[
for (i = l, j = r, k = l; k <= r; k++) { s\i=-`
if (a < b) { G;_QE<V~_
data[k] = temp[i++]; iwWy]V m7
a = temp; |-4C[5rM
} else { `,i'vb`W#b
data[k] = temp[j--]; gvvl3`S{
b = temp[j]; zvf:*Na")
} ;F9<Yv
} oEbgyT gB
} |Ak>kQJ(1z
eZWN9#p2
/** M[$(Pu
* @param data [/hS5TG|7
* @param l (mz5vzyw
* @param i Z)EmX=
*/ mt3j- Mw
private void insertSort(int[] data, int start, int len) { &o{I9MD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); La48M'u
} J;h4)w~9H3
} Z]DO
} [RCUP.
} Gc>bli<-
ez=$]cln
堆排序： [?x9NQ{
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package org.rut.util.algorithm.support; 9 P_`IsVK
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import org.rut.util.algorithm.SortUtil; vA@Kb3,
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/** ]2(vO0~
* @author treeroot _ vVw2HH
* @since 2006-2-2 QLH&WF
* @version 1.0 :'?%%P
*/ h^^zR)EVb
public class HeapSort implements SortUtil.Sort{ @'L/]
yaD<jc(O
/* (non-Javadoc) hDJq:g wD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {MdxIp[
*/ zIt-mU
public void sort(int[] data) { U^vQr%ha
MaxHeap h=new MaxHeap(); #&0)kr66
h.init(data); ZOc1 vj
for(int i=0;i h.remove(); fiOc;d8
System.arraycopy(h.queue,1,data,0,data.length); 8T92;.~(
} | qtdmm
";}Lf1M9
private static class MaxHeap{ Vd3'dq8/?
l%\3'N]
void init(int[] data){ }uo5rB5D
this.queue=new int[data.length+1]; s (|T@g
for(int i=0;i queue[++size]=data; o0$R|/>i
fixUp(size); o6sL~*hQ
} 26JP<&%L
} 3xef>Xv=
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private int size=0; g]85[xz
)hmU/E@
private int[] queue; JL $6Fw;
fpf1^TZ
public int get() { LSb3w/3M
return queue[1]; {PgB~|W
} r)Ts(#Z
sv\'XarM
public void remove() { |0FRKD]
SortUtil.swap(queue,1,size--); t^ LXGQ
fixDown(1); c_c]0Tm
} ;tTM3W-h
file://fixdown 'c5#M,G~
private void fixDown(int k) { Ze~$by|9f
int j; (UDF^
while ((j = k << 1) <= size) { QEL^0c8~
if (j < size %26amp;%26amp; queue[j] j++; )~xL_yW_X
if (queue[k]>queue[j]) file://不用交换 IF~i*
break; :0IxnK(r&
SortUtil.swap(queue,j,k); _'<V<OjVM!
k = j; O$u;]cg
} 4r#O._Z
} jb1OcI%
private void fixUp(int k) { A]R7H1
while (k > 1) { ^tX+<X
int j = k >> 1; -B:Z(]3#\
if (queue[j]>queue[k]) R9&T0Qf
break; XRXKO>4q
SortUtil.swap(queue,j,k); )bRe"jxn7
k = j; iz]Vb{5n%
} @QI]P{
} k1Zu&4C\
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} yveyAsN`B
7iu?Q
} W!q'wrIx(
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SortUtil： *-$u\?$
hj64ES#x
package org.rut.util.algorithm; k|0Fa}Z[
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import org.rut.util.algorithm.support.BubbleSort; ?GqFtNz
import org.rut.util.algorithm.support.HeapSort; uA=6 HpDB
import org.rut.util.algorithm.support.ImprovedMergeSort; oc'#sE
import org.rut.util.algorithm.support.ImprovedQuickSort; HRIf)n&~f
import org.rut.util.algorithm.support.InsertSort; *V#v6r7<Y/
import org.rut.util.algorithm.support.MergeSort; UXD?gK1
import org.rut.util.algorithm.support.QuickSort; g`)3m,\
import org.rut.util.algorithm.support.SelectionSort; 84L!r
import org.rut.util.algorithm.support.ShellSort; r5Ej
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/** +*,rOK`C
* @author treeroot zf$&+E-
* @since 2006-2-2 Hb'fEo r
* @version 1.0 9(lIz{
*/ lz\{ X
public class SortUtil { *cCr0\Z`
public final static int INSERT = 1; pC(AM=RY!
public final static int BUBBLE = 2; }<7Dyn,
public final static int SELECTION = 3; hKtOh
public final static int SHELL = 4; *E0+!
public final static int QUICK = 5; hRb k-b
public final static int IMPROVED_QUICK = 6; x={t}qDS8
public final static int MERGE = 7; Q_QmyD~m
public final static int IMPROVED_MERGE = 8; Y<3s_
public final static int HEAP = 9; ]*j>yj.Y'~
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public static void sort(int[] data) { ?15k~1nA
sort(data, IMPROVED_QUICK); /b6Y~YbgU
} eHK}U+"\
private static String[] name={ A}C&WT~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )<G>]IP<
}; d|TRP,y
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private static Sort[] impl=new Sort[]{ 2g-'.w
new InsertSort(), d hiLv_/
new BubbleSort(), yd"|HHx
new SelectionSort(), $m:}{:LDCf
new ShellSort(), J9ovy>G
new QuickSort(), Wd$N[|
new ImprovedQuickSort(), CvmZW$5Yo
new MergeSort(), D}"\nCz}y&
new ImprovedMergeSort(), j)Kk:BFFY
new HeapSort() a1ZGMQq!
}; p`gg
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public static String toString(int algorithm){ j^KM
return name[algorithm-1]; $>'}6?C.
} mhJ>5z
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public static void sort(int[] data, int algorithm) { 9UOx~Ty
impl[algorithm-1].sort(data); 1jo.d
} Oz^+;P1
w$A*|^w1
public static interface Sort { TCU|k ,
public void sort(int[] data); z%ljEI"<C
} iJ42` 51
tnqW!F~
public static void swap(int[] data, int i, int j) { /r@P\_
int temp = data; \|R`wFn^P
data = data[j]; QC~B8]
data[j] = temp; SynxMUlA
} l1jS2O(
} l,h#RTfry